v2-0001-Trim-regression-test-expected-output-for-xml.patch

text/plain

Filename: v2-0001-Trim-regression-test-expected-output-for-xml.patch
Type: text/plain
Part: 0
Message: Re: Use \if/\endif to remove non-libxml2 expected output in regression tests

Patch

Format: format-patch
Series: patch v2-0001
Subject: Trim regression test expected output for xml
File+
src/test/regress/expected/xml_1.out 7 1484
src/test/regress/expected/xml_2.out 0 1873
src/test/regress/expected/xml.out 31 25
src/test/regress/sql/xml.sql 14 7
From 1e9bbbbfa547d556b164985dd8d64e96afa5edb7 Mon Sep 17 00:00:00 2001
From: Michael Paquier <michael@paquier.xyz>
Date: Mon, 15 Jun 2026 09:47:10 +0900
Subject: [PATCH v2] Trim regression test expected output for xml

Three expected test outputs needed to be updated.  The expected output
trimmed here shaves a lot of lines.  This commit reduces the amount of
expected output to maintain.

Tom Lane has some up with a way to remove xml_2.out (output required for
libxml2 2.9.3), by tweaking the XML inputs generate the same errors
across all known version.  xml_1.out is reduced in size by using an \if
query that checks at a very early stage of the test if XML data can be
handled (my tweak).

(XXX: need to edit that more.)

Author: Tom Lane <tgl@sss.pgh.pa.us>
Author: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/aiu6CXO67q-s70n5@paquier.xyz
Backpatch-through: 14
---
 src/test/regress/expected/xml.out   |   56 +-
 src/test/regress/expected/xml_1.out | 1491 +--------------------
 src/test/regress/expected/xml_2.out | 1873 ---------------------------
 src/test/regress/sql/xml.sql        |   21 +-
 4 files changed, 52 insertions(+), 3389 deletions(-)
 delete mode 100644 src/test/regress/expected/xml_2.out

diff --git a/src/test/regress/expected/xml.out b/src/test/regress/expected/xml.out
index 3e80a7ff465d..c8f89104ce36 100644
--- a/src/test/regress/expected/xml.out
+++ b/src/test/regress/expected/xml.out
@@ -4,13 +4,19 @@ CREATE TABLE xmltest (
 );
 INSERT INTO xmltest VALUES (1, '<value>one</value>');
 INSERT INTO xmltest VALUES (2, '<value>two</value>');
-INSERT INTO xmltest VALUES (3, '<wrong');
+INSERT INTO xmltest VALUES (3, '<value>two</wrong>  ');
 ERROR:  invalid XML content
-LINE 1: INSERT INTO xmltest VALUES (3, '<wrong');
+LINE 1: INSERT INTO xmltest VALUES (3, '<value>two</wrong>  ');
                                        ^
-DETAIL:  line 1: Couldn't find end of Start Tag wrong line 1
-<wrong
-      ^
+DETAIL:  line 1: Opening and ending tag mismatch: value line 1 and wrong
+<value>two</wrong>  
+                  ^
+-- If no XML data could be inserted, skip the tests as the server has been
+-- compiled without libxml support.
+SELECT count(*) = 0 AS skip_test FROM xmltest \gset
+\if :skip_test
+\quit
+\endif
 SELECT * FROM xmltest;
  id |        data        
 ----+--------------------
@@ -89,13 +95,13 @@ SELECT xmlconcat(1, 2);
 ERROR:  argument of XMLCONCAT must be type xml, not type integer
 LINE 1: SELECT xmlconcat(1, 2);
                          ^
-SELECT xmlconcat('bad', '<syntax');
+SELECT xmlconcat('bad', '<wrong></syntax>  ');
 ERROR:  invalid XML content
-LINE 1: SELECT xmlconcat('bad', '<syntax');
+LINE 1: SELECT xmlconcat('bad', '<wrong></syntax>  ');
                                 ^
-DETAIL:  line 1: Couldn't find end of Start Tag syntax line 1
-<syntax
-       ^
+DETAIL:  line 1: Opening and ending tag mismatch: wrong line 1 and syntax
+<wrong></syntax>  
+                ^
 SELECT xmlconcat('<foo/>', NULL, '<?xml version="1.1" standalone="no"?><bar/>');
   xmlconcat   
 --------------
@@ -271,13 +277,13 @@ SELECT xmlparse(content '<relativens xmlns=''relative''/>');
  <relativens xmlns='relative'/>
 (1 row)
 
-SELECT xmlparse(content '<twoerrors>&idontexist;</unbalanced>');
+SELECT xmlparse(content '<twoerrors>&idontexist;</unbalanced>  ');
 ERROR:  invalid XML content
 DETAIL:  line 1: Entity 'idontexist' not defined
-<twoerrors>&idontexist;</unbalanced>
+<twoerrors>&idontexist;</unbalanced>  
                        ^
 line 1: Opening and ending tag mismatch: twoerrors line 1 and unbalanced
-<twoerrors>&idontexist;</unbalanced>
+<twoerrors>&idontexist;</unbalanced>  
                                     ^
 SELECT xmlparse(content '<nosuchprefix:tag/>');
       xmlparse       
@@ -285,11 +291,11 @@ SELECT xmlparse(content '<nosuchprefix:tag/>');
  <nosuchprefix:tag/>
 (1 row)
 
-SELECT xmlparse(document '   ');
+SELECT xmlparse(document '!');
 ERROR:  invalid XML document
 DETAIL:  line 1: Start tag expected, '<' not found
-   
-   ^
+!
+^
 SELECT xmlparse(document 'abc');
 ERROR:  invalid XML document
 DETAIL:  line 1: Start tag expected, '<' not found
@@ -301,21 +307,21 @@ SELECT xmlparse(document '<abc>x</abc>');
  <abc>x</abc>
 (1 row)
 
-SELECT xmlparse(document '<invalidentity>&</abc>');
+SELECT xmlparse(document '<invalidentity>&</abc>  ');
 ERROR:  invalid XML document
 DETAIL:  line 1: xmlParseEntityRef: no name
-<invalidentity>&</abc>
+<invalidentity>&</abc>  
                 ^
 line 1: Opening and ending tag mismatch: invalidentity line 1 and abc
-<invalidentity>&</abc>
+<invalidentity>&</abc>  
                       ^
-SELECT xmlparse(document '<undefinedentity>&idontexist;</abc>');
+SELECT xmlparse(document '<undefinedentity>&idontexist;</abc>  ');
 ERROR:  invalid XML document
 DETAIL:  line 1: Entity 'idontexist' not defined
-<undefinedentity>&idontexist;</abc>
+<undefinedentity>&idontexist;</abc>  
                              ^
 line 1: Opening and ending tag mismatch: undefinedentity line 1 and abc
-<undefinedentity>&idontexist;</abc>
+<undefinedentity>&idontexist;</abc>  
                                    ^
 SELECT xmlparse(document '<invalidns xmlns=''&lt;''/>');
          xmlparse          
@@ -329,13 +335,13 @@ SELECT xmlparse(document '<relativens xmlns=''relative''/>');
  <relativens xmlns='relative'/>
 (1 row)
 
-SELECT xmlparse(document '<twoerrors>&idontexist;</unbalanced>');
+SELECT xmlparse(document '<twoerrors>&idontexist;</unbalanced>  ');
 ERROR:  invalid XML document
 DETAIL:  line 1: Entity 'idontexist' not defined
-<twoerrors>&idontexist;</unbalanced>
+<twoerrors>&idontexist;</unbalanced>  
                        ^
 line 1: Opening and ending tag mismatch: twoerrors line 1 and unbalanced
-<twoerrors>&idontexist;</unbalanced>
+<twoerrors>&idontexist;</unbalanced>  
                                     ^
 SELECT xmlparse(document '<nosuchprefix:tag/>');
       xmlparse       
diff --git a/src/test/regress/expected/xml_1.out b/src/test/regress/expected/xml_1.out
index 2697c68a5116..fe7a17d42283 100644
--- a/src/test/regress/expected/xml_1.out
+++ b/src/test/regress/expected/xml_1.out
@@ -12,1490 +12,13 @@ ERROR:  unsupported XML feature
 LINE 1: INSERT INTO xmltest VALUES (2, '<value>two</value>');
                                        ^
 DETAIL:  This functionality requires the server to be built with libxml support.
-INSERT INTO xmltest VALUES (3, '<wrong');
+INSERT INTO xmltest VALUES (3, '<value>two</wrong>  ');
 ERROR:  unsupported XML feature
-LINE 1: INSERT INTO xmltest VALUES (3, '<wrong');
+LINE 1: INSERT INTO xmltest VALUES (3, '<value>two</wrong>  ');
                                        ^
 DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT * FROM xmltest;
- id | data 
-----+------
-(0 rows)
-
--- test non-throwing API, too
-SELECT pg_input_is_valid('<value>one</value>', 'xml');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT pg_input_is_valid('<value>one</', 'xml');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT message FROM pg_input_error_info('<value>one</', 'xml');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT pg_input_is_valid('<?xml version="1.0" standalone="y"?><foo/>', 'xml');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT message FROM pg_input_error_info('<?xml version="1.0" standalone="y"?><foo/>', 'xml');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlcomment('test');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlcomment('-test');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlcomment('test-');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlcomment('--test');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlcomment('te st');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlconcat(xmlcomment('hello'),
-                 xmlelement(NAME qux, 'foo'),
-                 xmlcomment('world'));
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlconcat('hello', 'you');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlconcat('hello', 'you');
-                         ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlconcat(1, 2);
-ERROR:  argument of XMLCONCAT must be type xml, not type integer
-LINE 1: SELECT xmlconcat(1, 2);
-                         ^
-SELECT xmlconcat('bad', '<syntax');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlconcat('bad', '<syntax');
-                         ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlconcat('<foo/>', NULL, '<?xml version="1.1" standalone="no"?><bar/>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlconcat('<foo/>', NULL, '<?xml version="1.1" standa...
-                         ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlconcat('<?xml version="1.1"?><foo/>', NULL, '<?xml version="1.1" standalone="no"?><bar/>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlconcat('<?xml version="1.1"?><foo/>', NULL, '<?xml...
-                         ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlconcat(NULL);
- xmlconcat 
------------
- 
-(1 row)
-
-SELECT xmlconcat(NULL, NULL);
- xmlconcat 
------------
- 
-(1 row)
-
-SELECT xmlelement(name element,
-                  xmlattributes (1 as one, 'deuce' as two),
-                  'content');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name element,
-                  xmlattributes ('unnamed and wrong'));
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name element, xmlelement(name nested, 'stuff'));
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name employee, xmlforest(name, age, salary as pay)) FROM emp;
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name duplicate, xmlattributes(1 as a, 2 as b, 3 as a));
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name num, 37);
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name foo, text 'bar');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name foo, xml 'bar');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name foo, text 'b<a/>r');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name foo, xml 'b<a/>r');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name foo, array[1, 2, 3]);
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SET xmlbinary TO base64;
-SELECT xmlelement(name foo, bytea 'bar');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SET xmlbinary TO hex;
-SELECT xmlelement(name foo, bytea 'bar');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name foo, xmlattributes(true as bar));
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name foo, xmlattributes('2009-04-09 00:24:37'::timestamp as bar));
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name foo, xmlattributes('infinity'::timestamp as bar));
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlelement(name foo, xmlattributes('<>&"''' as funny, xml 'b<a/>r' as funnier));
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(content '');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(content '  ');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(content 'abc');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(content '<abc>x</abc>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(content '<invalidentity>&</invalidentity>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(content '<undefinedentity>&idontexist;</undefinedentity>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(content '<invalidns xmlns=''&lt;''/>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(content '<relativens xmlns=''relative''/>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(content '<twoerrors>&idontexist;</unbalanced>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(content '<nosuchprefix:tag/>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(document '   ');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(document 'abc');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(document '<abc>x</abc>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(document '<invalidentity>&</abc>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(document '<undefinedentity>&idontexist;</abc>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(document '<invalidns xmlns=''&lt;''/>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(document '<relativens xmlns=''relative''/>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(document '<twoerrors>&idontexist;</unbalanced>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlparse(document '<nosuchprefix:tag/>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlpi(name foo);
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlpi(name xml);
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlpi(name xmlstuff);
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlpi(name foo, 'bar');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlpi(name foo, 'in?>valid');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlpi(name foo, null);
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlpi(name xml, null);
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlpi(name xmlstuff, null);
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlpi(name "xml-stylesheet", 'href="mystyle.css" type="text/css"');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlpi(name foo, '   bar');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlroot(xml '<foo/>', version no value, standalone no value);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlroot(xml '<foo/>', version no value, standalone no...
-                           ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlroot(xml '<foo/>', version '2.0');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlroot(xml '<foo/>', version '2.0');
-                           ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlroot(xml '<foo/>', version no value, standalone yes);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlroot(xml '<foo/>', version no value, standalone ye...
-                           ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlroot(xml '<?xml version="1.1"?><foo/>', version no value, standalone yes);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlroot(xml '<?xml version="1.1"?><foo/>', version no...
-                           ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlroot(xmlroot(xml '<foo/>', version '1.0'), version '1.1', standalone no);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlroot(xmlroot(xml '<foo/>', version '1.0'), version...
-                                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlroot('<?xml version="1.1" standalone="yes"?><foo/>', version no value, standalone no);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlroot('<?xml version="1.1" standalone="yes"?><foo/>...
-                       ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlroot('<?xml version="1.1" standalone="yes"?><foo/>', version no value, standalone no value);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlroot('<?xml version="1.1" standalone="yes"?><foo/>...
-                       ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlroot('<?xml version="1.1" standalone="yes"?><foo/>', version no value);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlroot('<?xml version="1.1" standalone="yes"?><foo/>...
-                       ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlroot (
-  xmlelement (
-    name gazonk,
-    xmlattributes (
-      'val' AS name,
-      1 + 1 AS num
-    ),
-    xmlelement (
-      NAME qux,
-      'foo'
-    )
-  ),
-  version '1.0',
-  standalone yes
-);
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(content data as character varying(20)) FROM xmltest;
- xmlserialize 
---------------
-(0 rows)
-
-SELECT xmlserialize(content 'good' as char(10));
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(content 'good' as char(10));
-                                    ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(document 'bad' as text);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(document 'bad' as text);
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- indent
-SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val></bar></foo>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val><...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(CONTENT  '<foo><bar><val x="y">42</val></bar></foo>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(CONTENT  '<foo><bar><val x="y">42</val><...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- no indent
-SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val></bar></foo>' AS text NO INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val><...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(CONTENT  '<foo><bar><val x="y">42</val></bar></foo>' AS text NO INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(CONTENT  '<foo><bar><val x="y">42</val><...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- indent non singly-rooted xml
-SELECT xmlserialize(DOCUMENT '<foo>73</foo><bar><val x="y">42</val></bar>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(DOCUMENT '<foo>73</foo><bar><val x="y">4...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(CONTENT  '<foo>73</foo><bar><val x="y">42</val></bar>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(CONTENT  '<foo>73</foo><bar><val x="y">4...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- indent non singly-rooted xml with mixed contents
-SELECT xmlserialize(DOCUMENT 'text node<foo>73</foo>text node<bar><val x="y">42</val></bar>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(DOCUMENT 'text node<foo>73</foo>text nod...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(CONTENT  'text node<foo>73</foo>text node<bar><val x="y">42</val></bar>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(CONTENT  'text node<foo>73</foo>text nod...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- indent singly-rooted xml with mixed contents
-SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val><val x="y">text node<val>73</val></val></bar></foo>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val><...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(CONTENT  '<foo><bar><val x="y">42</val><val x="y">text node<val>73</val></val></bar></foo>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(CONTENT  '<foo><bar><val x="y">42</val><...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- indent empty string
-SELECT xmlserialize(DOCUMENT '' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(DOCUMENT '' AS text INDENT);
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(CONTENT  '' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(CONTENT  '' AS text INDENT);
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- whitespaces
-SELECT xmlserialize(DOCUMENT '  ' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(DOCUMENT '  ' AS text INDENT);
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(CONTENT  '  ' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(CONTENT  '  ' AS text INDENT);
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- indent null
-SELECT xmlserialize(DOCUMENT NULL AS text INDENT);
- xmlserialize 
---------------
- 
-(1 row)
-
-SELECT xmlserialize(CONTENT  NULL AS text INDENT);
- xmlserialize 
---------------
- 
-(1 row)
-
--- indent with XML declaration
-SELECT xmlserialize(DOCUMENT '<?xml version="1.0" encoding="UTF-8"?><foo><bar><val>73</val></bar></foo>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(DOCUMENT '<?xml version="1.0" encoding="...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(CONTENT  '<?xml version="1.0" encoding="UTF-8"?><foo><bar><val>73</val></bar></foo>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(CONTENT  '<?xml version="1.0" encoding="...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- indent containing DOCTYPE declaration
-SELECT xmlserialize(DOCUMENT '<!DOCTYPE a><a/>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(DOCUMENT '<!DOCTYPE a><a/>' AS text INDE...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(CONTENT  '<!DOCTYPE a><a/>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(CONTENT  '<!DOCTYPE a><a/>' AS text INDE...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- indent xml with empty element
-SELECT xmlserialize(DOCUMENT '<foo><bar></bar></foo>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(DOCUMENT '<foo><bar></bar></foo>' AS tex...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(CONTENT  '<foo><bar></bar></foo>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(CONTENT  '<foo><bar></bar></foo>' AS tex...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- 'no indent' = not using 'no indent'
-SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val></bar></foo>' AS text) = xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val></bar></foo>' AS text NO INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val><...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(CONTENT  '<foo><bar><val x="y">42</val></bar></foo>' AS text) = xmlserialize(CONTENT '<foo><bar><val x="y">42</val></bar></foo>' AS text NO INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(CONTENT  '<foo><bar><val x="y">42</val><...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- indent xml strings containing blank nodes
-SELECT xmlserialize(DOCUMENT '<foo>   <bar></bar>    </foo>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(DOCUMENT '<foo>   <bar></bar>    </foo>'...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlserialize(CONTENT  'text node<foo>    <bar></bar>   </foo>' AS text INDENT);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmlserialize(CONTENT  'text node<foo>    <bar></bar> ...
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml '<foo>bar</foo>' IS DOCUMENT;
-ERROR:  unsupported XML feature
-LINE 1: SELECT xml '<foo>bar</foo>' IS DOCUMENT;
-                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml '<foo>bar</foo><bar>foo</bar>' IS DOCUMENT;
-ERROR:  unsupported XML feature
-LINE 1: SELECT xml '<foo>bar</foo><bar>foo</bar>' IS DOCUMENT;
-                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml '<abc/>' IS NOT DOCUMENT;
-ERROR:  unsupported XML feature
-LINE 1: SELECT xml '<abc/>' IS NOT DOCUMENT;
-                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml 'abc' IS NOT DOCUMENT;
-ERROR:  unsupported XML feature
-LINE 1: SELECT xml 'abc' IS NOT DOCUMENT;
-                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT '<>' IS NOT DOCUMENT;
-ERROR:  unsupported XML feature
-LINE 1: SELECT '<>' IS NOT DOCUMENT;
-               ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlagg(data) FROM xmltest;
- xmlagg 
---------
- 
-(1 row)
-
-SELECT xmlagg(data) FROM xmltest WHERE id > 10;
- xmlagg 
---------
- 
-(1 row)
-
-SELECT xmlelement(name employees, xmlagg(xmlelement(name name, name))) FROM emp;
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
--- Check mapping SQL identifier to XML name
-SELECT xmlpi(name ":::_xml_abc135.%-&_");
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlpi(name "123");
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-PREPARE foo (xml) AS SELECT xmlconcat('<foo/>', $1);
-ERROR:  unsupported XML feature
-LINE 1: PREPARE foo (xml) AS SELECT xmlconcat('<foo/>', $1);
-                                              ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SET XML OPTION DOCUMENT;
-EXECUTE foo ('<bar/>');
-ERROR:  prepared statement "foo" does not exist
-EXECUTE foo ('bad');
-ERROR:  prepared statement "foo" does not exist
-SELECT xml '<!DOCTYPE a><a/><b/>';
-ERROR:  unsupported XML feature
-LINE 1: SELECT xml '<!DOCTYPE a><a/><b/>';
-                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SET XML OPTION CONTENT;
-EXECUTE foo ('<bar/>');
-ERROR:  prepared statement "foo" does not exist
-EXECUTE foo ('good');
-ERROR:  prepared statement "foo" does not exist
-SELECT xml '<!-- in SQL:2006+ a doc is content too--> <?y z?> <!DOCTYPE a><a/>';
-ERROR:  unsupported XML feature
-LINE 1: SELECT xml '<!-- in SQL:2006+ a doc is content too--> <?y z?...
-                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml '<?xml version="1.0"?> <!-- hi--> <!DOCTYPE a><a/>';
-ERROR:  unsupported XML feature
-LINE 1: SELECT xml '<?xml version="1.0"?> <!-- hi--> <!DOCTYPE a><a/...
-                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml '<!DOCTYPE a><a/>';
-ERROR:  unsupported XML feature
-LINE 1: SELECT xml '<!DOCTYPE a><a/>';
-                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml '<!-- hi--> oops <!DOCTYPE a><a/>';
-ERROR:  unsupported XML feature
-LINE 1: SELECT xml '<!-- hi--> oops <!DOCTYPE a><a/>';
-                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml '<!-- hi--> <oops/> <!DOCTYPE a><a/>';
-ERROR:  unsupported XML feature
-LINE 1: SELECT xml '<!-- hi--> <oops/> <!DOCTYPE a><a/>';
-                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml '<!DOCTYPE a><a/><b/>';
-ERROR:  unsupported XML feature
-LINE 1: SELECT xml '<!DOCTYPE a><a/><b/>';
-                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- Test backwards parsing
-CREATE VIEW xmlview1 AS SELECT xmlcomment('test');
-CREATE VIEW xmlview2 AS SELECT xmlconcat('hello', 'you');
-ERROR:  unsupported XML feature
-LINE 1: CREATE VIEW xmlview2 AS SELECT xmlconcat('hello', 'you');
-                                                 ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-CREATE VIEW xmlview3 AS SELECT xmlelement(name element, xmlattributes (1 as ":one:", 'deuce' as two), 'content&');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-CREATE VIEW xmlview4 AS SELECT xmlelement(name employee, xmlforest(name, age, salary as pay)) FROM emp;
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-CREATE VIEW xmlview5 AS SELECT xmlparse(content '<abc>x</abc>');
-CREATE VIEW xmlview6 AS SELECT xmlpi(name foo, 'bar');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-CREATE VIEW xmlview7 AS SELECT xmlroot(xml '<foo/>', version no value, standalone yes);
-ERROR:  unsupported XML feature
-LINE 1: CREATE VIEW xmlview7 AS SELECT xmlroot(xml '<foo/>', version...
-                                                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-CREATE VIEW xmlview8 AS SELECT xmlserialize(content 'good' as char(10));
-ERROR:  unsupported XML feature
-LINE 1: ...EATE VIEW xmlview8 AS SELECT xmlserialize(content 'good' as ...
-                                                             ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-CREATE VIEW xmlview9 AS SELECT xmlserialize(content 'good' as text);
-ERROR:  unsupported XML feature
-LINE 1: ...EATE VIEW xmlview9 AS SELECT xmlserialize(content 'good' as ...
-                                                             ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-CREATE VIEW xmlview10 AS SELECT xmlserialize(document '<foo><bar>42</bar></foo>' AS text indent);
-ERROR:  unsupported XML feature
-LINE 1: ...TE VIEW xmlview10 AS SELECT xmlserialize(document '<foo><bar...
-                                                             ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-CREATE VIEW xmlview11 AS SELECT xmlserialize(document '<foo><bar>42</bar></foo>' AS character varying no indent);
-ERROR:  unsupported XML feature
-LINE 1: ...TE VIEW xmlview11 AS SELECT xmlserialize(document '<foo><bar...
-                                                             ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT table_name, view_definition FROM information_schema.views
-  WHERE table_name LIKE 'xmlview%' ORDER BY 1;
- table_name |                                view_definition                                 
-------------+--------------------------------------------------------------------------------
- xmlview1   |  SELECT xmlcomment('test'::text) AS xmlcomment;
- xmlview5   |  SELECT XMLPARSE(CONTENT '<abc>x</abc>'::text STRIP WHITESPACE) AS "xmlparse";
-(2 rows)
-
--- Text XPath expressions evaluation
-SELECT xpath('/value', data) FROM xmltest;
- xpath 
--------
-(0 rows)
-
-SELECT xpath(NULL, NULL) IS NULL FROM xmltest;
- ?column? 
-----------
-(0 rows)
-
-SELECT xpath('', '<!-- error -->');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('', '<!-- error -->');
-                         ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('//text()', '<local:data xmlns:local="http://127.0.0.1"><local:piece id="1">number one</local:piece><local:piece id="2" /></local:data>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('//text()', '<local:data xmlns:local="http://12...
-                                 ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('//loc:piece/@id', '<local:data xmlns:local="http://127.0.0.1"><local:piece id="1">number one</local:piece><local:piece id="2" /></local:data>', ARRAY[ARRAY['loc', 'http://127.0.0.1']]);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('//loc:piece/@id', '<local:data xmlns:local="ht...
-                                        ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('//loc:piece', '<local:data xmlns:local="http://127.0.0.1"><local:piece id="1">number one</local:piece><local:piece id="2" /></local:data>', ARRAY[ARRAY['loc', 'http://127.0.0.1']]);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('//loc:piece', '<local:data xmlns:local="http:/...
-                                    ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('//loc:piece', '<local:data xmlns:local="http://127.0.0.1" xmlns="http://127.0.0.2"><local:piece id="1"><internal>number one</internal><internal2/></local:piece><local:piece id="2" /></local:data>', ARRAY[ARRAY['loc', 'http://127.0.0.1']]);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('//loc:piece', '<local:data xmlns:local="http:/...
-                                    ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('//b', '<a>one <b>two</b> three <b>etc</b></a>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('//b', '<a>one <b>two</b> three <b>etc</b></a>'...
-                            ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('//text()', '<root>&lt;</root>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('//text()', '<root>&lt;</root>');
-                                 ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('//@value', '<root value="&lt;"/>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('//@value', '<root value="&lt;"/>');
-                                 ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('''<<invalid>>''', '<root/>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('''<<invalid>>''', '<root/>');
-                                        ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('count(//*)', '<root><sub/><sub/></root>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('count(//*)', '<root><sub/><sub/></root>');
-                                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('count(//*)=0', '<root><sub/><sub/></root>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('count(//*)=0', '<root><sub/><sub/></root>');
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('count(//*)=3', '<root><sub/><sub/></root>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('count(//*)=3', '<root><sub/><sub/></root>');
-                                     ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('name(/*)', '<root><sub/><sub/></root>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('name(/*)', '<root><sub/><sub/></root>');
-                                 ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('/nosuchtag', '<root/>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('/nosuchtag', '<root/>');
-                                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('root', '<root/>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('root', '<root/>');
-                             ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath('//namespace::foo', '<root xmlns:foo="http://127.0.0.1"/>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('//namespace::foo', '<root xmlns:foo="http://12...
-                                         ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- Round-trip non-ASCII data through xpath().
-DO $$
-DECLARE
-  xml_declaration text := '<?xml version="1.0" encoding="ISO-8859-1"?>';
-  degree_symbol text;
-  res xml[];
-BEGIN
-  -- Per the documentation, except when the server encoding is UTF8, xpath()
-  -- may not work on non-ASCII data.  The untranslatable_character and
-  -- undefined_function traps below, currently dead code, will become relevant
-  -- if we remove this limitation.
-  IF current_setting('server_encoding') <> 'UTF8' THEN
-    RAISE LOG 'skip: encoding % unsupported for xpath',
-      current_setting('server_encoding');
-    RETURN;
-  END IF;
-
-  degree_symbol := convert_from('\xc2b0', 'UTF8');
-  res := xpath('text()', (xml_declaration ||
-    '<x>' || degree_symbol || '</x>')::xml);
-  IF degree_symbol <> res[1]::text THEN
-    RAISE 'expected % (%), got % (%)',
-      degree_symbol, convert_to(degree_symbol, 'UTF8'),
-      res[1], convert_to(res[1]::text, 'UTF8');
-  END IF;
-EXCEPTION
-  -- character with byte sequence 0xc2 0xb0 in encoding "UTF8" has no equivalent in encoding "LATIN8"
-  WHEN undefined_function
-  -- unsupported XML feature
-  OR feature_not_supported THEN
-    RAISE LOG 'skip: %', SQLERRM;
-END
-$$;
--- Test xmlexists and xpath_exists
-SELECT xmlexists('//town[text() = ''Toronto'']' PASSING BY REF '<towns><town>Bidford-on-Avon</town><town>Cwmbran</town><town>Bristol</town></towns>');
-ERROR:  unsupported XML feature
-LINE 1: ...sts('//town[text() = ''Toronto'']' PASSING BY REF '<towns><t...
-                                                             ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlexists('//town[text() = ''Cwmbran'']' PASSING BY REF '<towns><town>Bidford-on-Avon</town><town>Cwmbran</town><town>Bristol</town></towns>');
-ERROR:  unsupported XML feature
-LINE 1: ...sts('//town[text() = ''Cwmbran'']' PASSING BY REF '<towns><t...
-                                                             ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmlexists('count(/nosuchtag)' PASSING BY REF '<root/>');
-ERROR:  unsupported XML feature
-LINE 1: ...LECT xmlexists('count(/nosuchtag)' PASSING BY REF '<root/>')...
-                                                             ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath_exists('//town[text() = ''Toronto'']','<towns><town>Bidford-on-Avon</town><town>Cwmbran</town><town>Bristol</town></towns>'::xml);
-ERROR:  unsupported XML feature
-LINE 1: ...ELECT xpath_exists('//town[text() = ''Toronto'']','<towns><t...
-                                                             ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath_exists('//town[text() = ''Cwmbran'']','<towns><town>Bidford-on-Avon</town><town>Cwmbran</town><town>Bristol</town></towns>'::xml);
-ERROR:  unsupported XML feature
-LINE 1: ...ELECT xpath_exists('//town[text() = ''Cwmbran'']','<towns><t...
-                                                             ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xpath_exists('count(/nosuchtag)', '<root/>'::xml);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath_exists('count(/nosuchtag)', '<root/>'::xml);
-                                                 ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-INSERT INTO xmltest VALUES (4, '<menu><beers><name>Budvar</name><cost>free</cost><name>Carling</name><cost>lots</cost></beers></menu>'::xml);
-ERROR:  unsupported XML feature
-LINE 1: INSERT INTO xmltest VALUES (4, '<menu><beers><name>Budvar</n...
-                                       ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-INSERT INTO xmltest VALUES (5, '<menu><beers><name>Molson</name><cost>free</cost><name>Carling</name><cost>lots</cost></beers></menu>'::xml);
-ERROR:  unsupported XML feature
-LINE 1: INSERT INTO xmltest VALUES (5, '<menu><beers><name>Molson</n...
-                                       ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-INSERT INTO xmltest VALUES (6, '<myns:menu xmlns:myns="http://myns.com"><myns:beers><myns:name>Budvar</myns:name><myns:cost>free</myns:cost><myns:name>Carling</myns:name><myns:cost>lots</myns:cost></myns:beers></myns:menu>'::xml);
-ERROR:  unsupported XML feature
-LINE 1: INSERT INTO xmltest VALUES (6, '<myns:menu xmlns:myns="http:...
-                                       ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-INSERT INTO xmltest VALUES (7, '<myns:menu xmlns:myns="http://myns.com"><myns:beers><myns:name>Molson</myns:name><myns:cost>free</myns:cost><myns:name>Carling</myns:name><myns:cost>lots</myns:cost></myns:beers></myns:menu>'::xml);
-ERROR:  unsupported XML feature
-LINE 1: INSERT INTO xmltest VALUES (7, '<myns:menu xmlns:myns="http:...
-                                       ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beer' PASSING data);
- count 
--------
-     0
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beer' PASSING BY REF data BY REF);
- count 
--------
-     0
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beers' PASSING BY REF data);
- count 
--------
-     0
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beers/name[text() = ''Molson'']' PASSING BY REF data);
- count 
--------
-     0
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/menu/beer',data);
- count 
--------
-     0
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/menu/beers',data);
- count 
--------
-     0
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/menu/beers/name[text() = ''Molson'']',data);
- count 
--------
-     0
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/myns:menu/myns:beer',data,ARRAY[ARRAY['myns','http://myns.com']]);
- count 
--------
-     0
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/myns:menu/myns:beers',data,ARRAY[ARRAY['myns','http://myns.com']]);
- count 
--------
-     0
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/myns:menu/myns:beers/myns:name[text() = ''Molson'']',data,ARRAY[ARRAY['myns','http://myns.com']]);
- count 
--------
-     0
-(1 row)
-
-CREATE TABLE query ( expr TEXT );
-INSERT INTO query VALUES ('/menu/beers/cost[text() = ''lots'']');
-SELECT COUNT(id) FROM xmltest, query WHERE xmlexists(expr PASSING BY REF data);
- count 
--------
-     0
-(1 row)
-
--- Test xml_is_well_formed and variants
-SELECT xml_is_well_formed_document('<foo>bar</foo>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed_document('abc');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed_content('<foo>bar</foo>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed_content('abc');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SET xmloption TO DOCUMENT;
-SELECT xml_is_well_formed('abc');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed('<>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed('<abc/>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed('<foo>bar</foo>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed('<foo>bar</foo');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed('<foo><bar>baz</foo>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed('<local:data xmlns:local="http://127.0.0.1"><local:piece id="1">number one</local:piece><local:piece id="2" /></local:data>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed('<pg:foo xmlns:pg="http://postgresql.org/stuff">bar</my:foo>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed('<pg:foo xmlns:pg="http://postgresql.org/stuff">bar</pg:foo>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed('<invalidentity>&</abc>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed('<undefinedentity>&idontexist;</abc>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed('<invalidns xmlns=''&lt;''/>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed('<relativens xmlns=''relative''/>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xml_is_well_formed('<twoerrors>&idontexist;</unbalanced>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SET xmloption TO CONTENT;
-SELECT xml_is_well_formed('abc');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
--- Since xpath() deals with namespaces, it's a bit stricter about
--- what's well-formed and what's not. If we don't obey these rules
--- (i.e. ignore namespace-related errors from libxml), xpath()
--- fails in subtle ways. The following would for example produce
--- the xml value
---   <invalidns xmlns='<'/>
--- which is invalid because '<' may not appear un-escaped in
--- attribute values.
--- Since different libxml versions emit slightly different
--- error messages, we suppress the DETAIL in this test.
-\set VERBOSITY terse
-SELECT xpath('/*', '<invalidns xmlns=''&lt;''/>');
-ERROR:  unsupported XML feature at character 20
-\set VERBOSITY default
--- Again, the XML isn't well-formed for namespace purposes
-SELECT xpath('/*', '<nosuchprefix:tag/>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('/*', '<nosuchprefix:tag/>');
-                           ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- XPath deprecates relative namespaces, but they're not supposed to
--- throw an error, only a warning.
-SELECT xpath('/*', '<relativens xmlns=''relative''/>');
-ERROR:  unsupported XML feature
-LINE 1: SELECT xpath('/*', '<relativens xmlns=''relative''/>');
-                           ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- External entity references should not leak filesystem information.
-SELECT XMLPARSE(DOCUMENT '<!DOCTYPE foo [<!ENTITY c SYSTEM "/etc/passwd">]><foo>&c;</foo>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT XMLPARSE(DOCUMENT '<!DOCTYPE foo [<!ENTITY c SYSTEM "/etc/no.such.file">]><foo>&c;</foo>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
--- This might or might not load the requested DTD, but it mustn't throw error.
-SELECT XMLPARSE(DOCUMENT '<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"><chapter>&nbsp;</chapter>');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
--- XMLPATH tests
-CREATE TABLE xmldata(data xml);
-INSERT INTO xmldata VALUES('<ROWS>
-<ROW id="1">
-  <COUNTRY_ID>AU</COUNTRY_ID>
-  <COUNTRY_NAME>Australia</COUNTRY_NAME>
-  <REGION_ID>3</REGION_ID>
-</ROW>
-<ROW id="2">
-  <COUNTRY_ID>CN</COUNTRY_ID>
-  <COUNTRY_NAME>China</COUNTRY_NAME>
-  <REGION_ID>3</REGION_ID>
-</ROW>
-<ROW id="3">
-  <COUNTRY_ID>HK</COUNTRY_ID>
-  <COUNTRY_NAME>HongKong</COUNTRY_NAME>
-  <REGION_ID>3</REGION_ID>
-</ROW>
-<ROW id="4">
-  <COUNTRY_ID>IN</COUNTRY_ID>
-  <COUNTRY_NAME>India</COUNTRY_NAME>
-  <REGION_ID>3</REGION_ID>
-</ROW>
-<ROW id="5">
-  <COUNTRY_ID>JP</COUNTRY_ID>
-  <COUNTRY_NAME>Japan</COUNTRY_NAME>
-  <REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>
-</ROW>
-<ROW id="6">
-  <COUNTRY_ID>SG</COUNTRY_ID>
-  <COUNTRY_NAME>Singapore</COUNTRY_NAME>
-  <REGION_ID>3</REGION_ID><SIZE unit="km">791</SIZE>
-</ROW>
-</ROWS>');
-ERROR:  unsupported XML feature
-LINE 1: INSERT INTO xmldata VALUES('<ROWS>
-                                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- XMLTABLE with columns
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME/text()' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
- id | _id | country_name | country_id | region_id | size | unit | premier_name 
-----+-----+--------------+------------+-----------+------+------+--------------
-(0 rows)
-
-CREATE VIEW xmltableview1 AS SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME/text()' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
-SELECT * FROM xmltableview1;
- id | _id | country_name | country_id | region_id | size | unit | premier_name 
-----+-----+--------------+------------+-----------+------+------+--------------
-(0 rows)
-
-\sv xmltableview1
-CREATE OR REPLACE VIEW public.xmltableview1 AS
- SELECT "xmltable".id,
-    "xmltable"._id,
-    "xmltable".country_name,
-    "xmltable".country_id,
-    "xmltable".region_id,
-    "xmltable".size,
-    "xmltable".unit,
-    "xmltable".premier_name
-   FROM ( SELECT xmldata.data
-           FROM xmldata) x,
-    LATERAL XMLTABLE(('/ROWS/ROW'::text) PASSING (x.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME/text()'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
-EXPLAIN (COSTS OFF) SELECT * FROM xmltableview1;
-               QUERY PLAN                
------------------------------------------
- Nested Loop
-   ->  Seq Scan on xmldata
-   ->  Table Function Scan on "xmltable"
-(3 rows)
-
-EXPLAIN (COSTS OFF, VERBOSE) SELECT * FROM xmltableview1;
-                                                                                                                                                                                                                            QUERY PLAN                                                                                                                                                                                                                            
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- Nested Loop
-   Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-   ->  Seq Scan on public.xmldata
-         Output: xmldata.data
-   ->  Table Function Scan on "xmltable"
-         Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-         Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME/text()'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
-(7 rows)
-
--- errors
-SELECT * FROM XMLTABLE (ROW () PASSING null COLUMNS v1 timestamp) AS f (v1, v2);
-ERROR:  XMLTABLE function has 1 columns available but 2 columns specified
-SELECT * FROM XMLTABLE (ROW () PASSING null COLUMNS v1 timestamp __pg__is_not_null 1) AS f (v1);
-ERROR:  option name "__pg__is_not_null" cannot be used in XMLTABLE
-LINE 1: ...MLTABLE (ROW () PASSING null COLUMNS v1 timestamp __pg__is_n...
-                                                             ^
--- XMLNAMESPACES tests
-SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS zz),
-                      '/zz:rows/zz:row'
-                      PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
-                      COLUMNS a int PATH 'zz:a');
-ERROR:  unsupported XML feature
-LINE 3:                       PASSING '<rows xmlns="http://x.y"><row...
-                                      ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-CREATE VIEW xmltableview2 AS SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS "Zz"),
-                      '/Zz:rows/Zz:row'
-                      PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
-                      COLUMNS a int PATH 'Zz:a');
-ERROR:  unsupported XML feature
-LINE 3:                       PASSING '<rows xmlns="http://x.y"><row...
-                                      ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT * FROM xmltableview2;
-ERROR:  relation "xmltableview2" does not exist
-LINE 1: SELECT * FROM xmltableview2;
-                      ^
-\sv xmltableview2
-ERROR:  relation "xmltableview2" does not exist
-SELECT * FROM XMLTABLE(XMLNAMESPACES(DEFAULT 'http://x.y'),
-                      '/rows/row'
-                      PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
-                      COLUMNS a int PATH 'a');
-ERROR:  unsupported XML feature
-LINE 3:                       PASSING '<rows xmlns="http://x.y"><row...
-                                      ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT * FROM XMLTABLE('.'
-                       PASSING '<foo/>'
-                       COLUMNS a text PATH 'foo/namespace::node()');
-ERROR:  unsupported XML feature
-LINE 2:                        PASSING '<foo/>'
-                                       ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- used in prepare statements
-PREPARE pp AS
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
-EXECUTE pp;
- id | _id | country_name | country_id | region_id | size | unit | premier_name 
-----+-----+--------------+------------+-----------+------+------+--------------
-(0 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int);
- COUNTRY_NAME | REGION_ID 
---------------+-----------
-(0 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY, "COUNTRY_NAME" text, "REGION_ID" int);
- id | COUNTRY_NAME | REGION_ID 
-----+--------------+-----------
-(0 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int);
- id | COUNTRY_NAME | REGION_ID 
-----+--------------+-----------
-(0 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id');
- id 
-----
-(0 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY);
- id 
-----
-(0 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH '.');
- id | COUNTRY_NAME | REGION_ID | rawdata 
-----+--------------+-----------+---------
-(0 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH './*');
- id | COUNTRY_NAME | REGION_ID | rawdata 
-----+--------------+-----------+---------
-(0 rows)
-
-SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z-->  bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text);
-ERROR:  unsupported XML feature
-LINE 1: SELECT * FROM xmltable('/root' passing '<root><element>a1a<!...
-                                               ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z-->  bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text PATH 'element/text()'); -- should fail
-ERROR:  unsupported XML feature
-LINE 1: SELECT * FROM xmltable('/root' passing '<root><element>a1a<!...
-                                               ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- CDATA test
-select * from xmltable('d/r' passing '<d><r><c><![CDATA[<hello> &"<>!<a>foo</a>]]></c></r><r><c>2</c></r></d>' columns c text);
-ERROR:  unsupported XML feature
-LINE 1: select * from xmltable('d/r' passing '<d><r><c><![CDATA[<hel...
-                                             ^
-DETAIL:  This functionality requires the server to be built with libxml support.
--- XML builtin entities
-SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>&apos;</ent></a><a><ent>&quot;</ent></a><a><ent>&amp;</ent></a><a><ent>&lt;</ent></a><a><ent>&gt;</ent></a></x>' COLUMNS ent text);
-ERROR:  unsupported XML feature
-LINE 1: SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>&apos;</en...
-                                              ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>&apos;</ent></a><a><ent>&quot;</ent></a><a><ent>&amp;</ent></a><a><ent>&lt;</ent></a><a><ent>&gt;</ent></a></x>' COLUMNS ent xml);
-ERROR:  unsupported XML feature
-LINE 1: SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>&apos;</en...
-                                              ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-EXPLAIN (VERBOSE, COSTS OFF)
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
-                                                                                                                                                                                                                        QUERY PLAN                                                                                                                                                                                                                         
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- Nested Loop
-   Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-   ->  Seq Scan on public.xmldata
-         Output: xmldata.data
-   ->  Table Function Scan on "xmltable"
-         Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-         Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
-(7 rows)
-
--- test qual
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) WHERE "COUNTRY_NAME" = 'Japan';
- COUNTRY_NAME | REGION_ID 
---------------+-----------
-(0 rows)
-
-EXPLAIN (VERBOSE, COSTS OFF)
-SELECT f.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) AS f WHERE "COUNTRY_NAME" = 'Japan';
-                                                                                    QUERY PLAN                                                                                    
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- Nested Loop
-   Output: f."COUNTRY_NAME", f."REGION_ID"
-   ->  Seq Scan on public.xmldata
-         Output: xmldata.data
-   ->  Table Function Scan on "xmltable" f
-         Output: f."COUNTRY_NAME", f."REGION_ID"
-         Table Function Call: XMLTABLE(('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]'::text) PASSING (xmldata.data) COLUMNS "COUNTRY_NAME" text, "REGION_ID" integer)
-         Filter: (f."COUNTRY_NAME" = 'Japan'::text)
-(8 rows)
-
-EXPLAIN (VERBOSE, FORMAT JSON, COSTS OFF)
-SELECT f.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) AS f WHERE "COUNTRY_NAME" = 'Japan';
-                                                                                           QUERY PLAN                                                                                            
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- [                                                                                                                                                                                              +
-   {                                                                                                                                                                                            +
-     "Plan": {                                                                                                                                                                                  +
-       "Node Type": "Nested Loop",                                                                                                                                                              +
-       "Parallel Aware": false,                                                                                                                                                                 +
-       "Async Capable": false,                                                                                                                                                                  +
-       "Join Type": "Inner",                                                                                                                                                                    +
-       "Disabled": false,                                                                                                                                                                       +
-       "Output": ["f.\"COUNTRY_NAME\"", "f.\"REGION_ID\""],                                                                                                                                     +
-       "Inner Unique": false,                                                                                                                                                                   +
-       "Plans": [                                                                                                                                                                               +
-         {                                                                                                                                                                                      +
-           "Node Type": "Seq Scan",                                                                                                                                                             +
-           "Parent Relationship": "Outer",                                                                                                                                                      +
-           "Parallel Aware": false,                                                                                                                                                             +
-           "Async Capable": false,                                                                                                                                                              +
-           "Relation Name": "xmldata",                                                                                                                                                          +
-           "Schema": "public",                                                                                                                                                                  +
-           "Alias": "xmldata",                                                                                                                                                                  +
-           "Disabled": false,                                                                                                                                                                   +
-           "Output": ["xmldata.data"]                                                                                                                                                           +
-         },                                                                                                                                                                                     +
-         {                                                                                                                                                                                      +
-           "Node Type": "Table Function Scan",                                                                                                                                                  +
-           "Parent Relationship": "Inner",                                                                                                                                                      +
-           "Parallel Aware": false,                                                                                                                                                             +
-           "Async Capable": false,                                                                                                                                                              +
-           "Table Function Name": "xmltable",                                                                                                                                                   +
-           "Alias": "f",                                                                                                                                                                        +
-           "Disabled": false,                                                                                                                                                                   +
-           "Output": ["f.\"COUNTRY_NAME\"", "f.\"REGION_ID\""],                                                                                                                                 +
-           "Table Function Call": "XMLTABLE(('/ROWS/ROW[COUNTRY_NAME=\"Japan\" or COUNTRY_NAME=\"India\"]'::text) PASSING (xmldata.data) COLUMNS \"COUNTRY_NAME\" text, \"REGION_ID\" integer)",+
-           "Filter": "(f.\"COUNTRY_NAME\" = 'Japan'::text)"                                                                                                                                     +
-         }                                                                                                                                                                                      +
-       ]                                                                                                                                                                                        +
-     }                                                                                                                                                                                          +
-   }                                                                                                                                                                                            +
- ]
-(1 row)
-
--- should to work with more data
-INSERT INTO xmldata VALUES('<ROWS>
-<ROW id="10">
-  <COUNTRY_ID>CZ</COUNTRY_ID>
-  <COUNTRY_NAME>Czech Republic</COUNTRY_NAME>
-  <REGION_ID>2</REGION_ID><PREMIER_NAME>Milos Zeman</PREMIER_NAME>
-</ROW>
-<ROW id="11">
-  <COUNTRY_ID>DE</COUNTRY_ID>
-  <COUNTRY_NAME>Germany</COUNTRY_NAME>
-  <REGION_ID>2</REGION_ID>
-</ROW>
-<ROW id="12">
-  <COUNTRY_ID>FR</COUNTRY_ID>
-  <COUNTRY_NAME>France</COUNTRY_NAME>
-  <REGION_ID>2</REGION_ID>
-</ROW>
-</ROWS>');
-ERROR:  unsupported XML feature
-LINE 1: INSERT INTO xmldata VALUES('<ROWS>
-                                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-INSERT INTO xmldata VALUES('<ROWS>
-<ROW id="20">
-  <COUNTRY_ID>EG</COUNTRY_ID>
-  <COUNTRY_NAME>Egypt</COUNTRY_NAME>
-  <REGION_ID>1</REGION_ID>
-</ROW>
-<ROW id="21">
-  <COUNTRY_ID>SD</COUNTRY_ID>
-  <COUNTRY_NAME>Sudan</COUNTRY_NAME>
-  <REGION_ID>1</REGION_ID>
-</ROW>
-</ROWS>');
-ERROR:  unsupported XML feature
-LINE 1: INSERT INTO xmldata VALUES('<ROWS>
-                                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
- id | _id | country_name | country_id | region_id | size | unit | premier_name 
-----+-----+--------------+------------+-----------+------+------+--------------
-(0 rows)
-
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified')
-  WHERE region_id = 2;
- id | _id | country_name | country_id | region_id | size | unit | premier_name 
-----+-----+--------------+------------+-----------+------+------+--------------
-(0 rows)
-
-EXPLAIN (VERBOSE, COSTS OFF)
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified')
-  WHERE region_id = 2;
-                                                                                                                                                                                                                        QUERY PLAN                                                                                                                                                                                                                         
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- Nested Loop
-   Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-   ->  Seq Scan on public.xmldata
-         Output: xmldata.data
-   ->  Table Function Scan on "xmltable"
-         Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-         Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
-         Filter: ("xmltable".region_id = 2)
-(8 rows)
-
--- should fail, NULL value
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE' NOT NULL,
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
- id | _id | country_name | country_id | region_id | size | unit | premier_name 
-----+-----+--------------+------------+-----------+------+------+--------------
-(0 rows)
-
--- if all is ok, then result is empty
--- one line xml test
-WITH
-   x AS (SELECT proname, proowner, procost::numeric, pronargs,
-                array_to_string(proargnames,',') as proargnames,
-                case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes
-           FROM pg_proc WHERE proname = 'f_leak'),
-   y AS (SELECT xmlelement(name proc,
-                           xmlforest(proname, proowner,
-                                     procost, pronargs,
-                                     proargnames, proargtypes)) as proc
-           FROM x),
-   z AS (SELECT xmltable.*
-           FROM y,
-                LATERAL xmltable('/proc' PASSING proc
-                                 COLUMNS proname name,
-                                         proowner oid,
-                                         procost float,
-                                         pronargs int,
-                                         proargnames text,
-                                         proargtypes text))
-   SELECT * FROM z
-   EXCEPT SELECT * FROM x;
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
--- multi line xml test, result should be empty too
-WITH
-   x AS (SELECT proname, proowner, procost::numeric, pronargs,
-                array_to_string(proargnames,',') as proargnames,
-                case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes
-           FROM pg_proc),
-   y AS (SELECT xmlelement(name data,
-                           xmlagg(xmlelement(name proc,
-                                             xmlforest(proname, proowner, procost,
-                                                       pronargs, proargnames, proargtypes)))) as doc
-           FROM x),
-   z AS (SELECT xmltable.*
-           FROM y,
-                LATERAL xmltable('/data/proc' PASSING doc
-                                 COLUMNS proname name,
-                                         proowner oid,
-                                         procost float,
-                                         pronargs int,
-                                         proargnames text,
-                                         proargtypes text))
-   SELECT * FROM z
-   EXCEPT SELECT * FROM x;
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-CREATE TABLE xmltest2(x xml, _path text);
-INSERT INTO xmltest2 VALUES('<d><r><ac>1</ac></r></d>', 'A');
-ERROR:  unsupported XML feature
-LINE 1: INSERT INTO xmltest2 VALUES('<d><r><ac>1</ac></r></d>', 'A')...
-                                    ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-INSERT INTO xmltest2 VALUES('<d><r><bc>2</bc></r></d>', 'B');
-ERROR:  unsupported XML feature
-LINE 1: INSERT INTO xmltest2 VALUES('<d><r><bc>2</bc></r></d>', 'B')...
-                                    ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-INSERT INTO xmltest2 VALUES('<d><r><cc>3</cc></r></d>', 'C');
-ERROR:  unsupported XML feature
-LINE 1: INSERT INTO xmltest2 VALUES('<d><r><cc>3</cc></r></d>', 'C')...
-                                    ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-INSERT INTO xmltest2 VALUES('<d><r><dc>2</dc></r></d>', 'D');
-ERROR:  unsupported XML feature
-LINE 1: INSERT INTO xmltest2 VALUES('<d><r><dc>2</dc></r></d>', 'D')...
-                                    ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmltable.* FROM xmltest2, LATERAL xmltable('/d/r' PASSING x COLUMNS a int PATH '' || lower(_path) || 'c');
- a 
----
-(0 rows)
-
-SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH '.');
- a 
----
-(0 rows)
-
-SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH 'x' DEFAULT ascii(_path) - 54);
- a 
----
-(0 rows)
-
--- XPath result can be boolean or number too
-SELECT * FROM XMLTABLE('*' PASSING '<a>a</a>' COLUMNS a xml PATH '.', b text PATH '.', c text PATH '"hi"', d boolean PATH '. = "a"', e integer PATH 'string-length(.)');
-ERROR:  unsupported XML feature
-LINE 1: SELECT * FROM XMLTABLE('*' PASSING '<a>a</a>' COLUMNS a xml ...
-                                           ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-\x
-SELECT * FROM XMLTABLE('*' PASSING '<e>pre<!--c1--><?pi arg?><![CDATA[&ent1]]><n2>&amp;deep</n2>post</e>' COLUMNS x xml PATH '/e/n2', y xml PATH '/');
-ERROR:  unsupported XML feature
-LINE 1: SELECT * FROM XMLTABLE('*' PASSING '<e>pre<!--c1--><?pi arg?...
-                                           ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-\x
-SELECT * FROM XMLTABLE('.' PASSING XMLELEMENT(NAME a) columns a varchar(20) PATH '"<foo/>"', b xml PATH '"<foo/>"');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmltext(NULL);
- xmltext 
----------
- 
-(1 row)
-
-SELECT xmltext('');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmltext('  ');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmltext('foo `$_-+?=*^%!|/\()[]{}');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmltext('foo & <"bar">');
-ERROR:  unsupported XML feature
-DETAIL:  This functionality requires the server to be built with libxml support.
-SELECT xmltext('x'|| '<P>73</P>'::xml || .42 || true || 'j'::char);
-ERROR:  unsupported XML feature
-LINE 1: SELECT xmltext('x'|| '<P>73</P>'::xml || .42 || true || 'j':...
-                             ^
-DETAIL:  This functionality requires the server to be built with libxml support.
+-- If no XML data could be inserted, skip the tests as the server has been
+-- compiled without libxml support.
+SELECT count(*) = 0 AS skip_test FROM xmltest \gset
+\if :skip_test
+\quit
diff --git a/src/test/regress/expected/xml_2.out b/src/test/regress/expected/xml_2.out
deleted file mode 100644
index f51ad196e159..000000000000
--- a/src/test/regress/expected/xml_2.out
+++ /dev/null
@@ -1,1873 +0,0 @@
-CREATE TABLE xmltest (
-    id int,
-    data xml
-);
-INSERT INTO xmltest VALUES (1, '<value>one</value>');
-INSERT INTO xmltest VALUES (2, '<value>two</value>');
-INSERT INTO xmltest VALUES (3, '<wrong');
-ERROR:  invalid XML content
-LINE 1: INSERT INTO xmltest VALUES (3, '<wrong');
-                                       ^
-DETAIL:  line 1: Couldn't find end of Start Tag wrong line 1
-SELECT * FROM xmltest;
- id |        data        
-----+--------------------
-  1 | <value>one</value>
-  2 | <value>two</value>
-(2 rows)
-
--- test non-throwing API, too
-SELECT pg_input_is_valid('<value>one</value>', 'xml');
- pg_input_is_valid 
--------------------
- t
-(1 row)
-
-SELECT pg_input_is_valid('<value>one</', 'xml');
- pg_input_is_valid 
--------------------
- f
-(1 row)
-
-SELECT message FROM pg_input_error_info('<value>one</', 'xml');
-       message       
----------------------
- invalid XML content
-(1 row)
-
-SELECT pg_input_is_valid('<?xml version="1.0" standalone="y"?><foo/>', 'xml');
- pg_input_is_valid 
--------------------
- f
-(1 row)
-
-SELECT message FROM pg_input_error_info('<?xml version="1.0" standalone="y"?><foo/>', 'xml');
-                   message                    
-----------------------------------------------
- invalid XML content: invalid XML declaration
-(1 row)
-
-SELECT xmlcomment('test');
- xmlcomment  
--------------
- <!--test-->
-(1 row)
-
-SELECT xmlcomment('-test');
-  xmlcomment  
---------------
- <!---test-->
-(1 row)
-
-SELECT xmlcomment('test-');
-ERROR:  invalid XML comment
-SELECT xmlcomment('--test');
-ERROR:  invalid XML comment
-SELECT xmlcomment('te st');
-  xmlcomment  
---------------
- <!--te st-->
-(1 row)
-
-SELECT xmlconcat(xmlcomment('hello'),
-                 xmlelement(NAME qux, 'foo'),
-                 xmlcomment('world'));
-               xmlconcat                
-----------------------------------------
- <!--hello--><qux>foo</qux><!--world-->
-(1 row)
-
-SELECT xmlconcat('hello', 'you');
- xmlconcat 
------------
- helloyou
-(1 row)
-
-SELECT xmlconcat(1, 2);
-ERROR:  argument of XMLCONCAT must be type xml, not type integer
-LINE 1: SELECT xmlconcat(1, 2);
-                         ^
-SELECT xmlconcat('bad', '<syntax');
-ERROR:  invalid XML content
-LINE 1: SELECT xmlconcat('bad', '<syntax');
-                                ^
-DETAIL:  line 1: Couldn't find end of Start Tag syntax line 1
-SELECT xmlconcat('<foo/>', NULL, '<?xml version="1.1" standalone="no"?><bar/>');
-  xmlconcat   
---------------
- <foo/><bar/>
-(1 row)
-
-SELECT xmlconcat('<?xml version="1.1"?><foo/>', NULL, '<?xml version="1.1" standalone="no"?><bar/>');
-             xmlconcat             
------------------------------------
- <?xml version="1.1"?><foo/><bar/>
-(1 row)
-
-SELECT xmlconcat(NULL);
- xmlconcat 
------------
- 
-(1 row)
-
-SELECT xmlconcat(NULL, NULL);
- xmlconcat 
------------
- 
-(1 row)
-
-SELECT xmlelement(name element,
-                  xmlattributes (1 as one, 'deuce' as two),
-                  'content');
-                   xmlelement                   
-------------------------------------------------
- <element one="1" two="deuce">content</element>
-(1 row)
-
-SELECT xmlelement(name element,
-                  xmlattributes ('unnamed and wrong'));
-ERROR:  unnamed XML attribute value must be a column reference
-LINE 2:                   xmlattributes ('unnamed and wrong'));
-                                         ^
-SELECT xmlelement(name element, xmlelement(name nested, 'stuff'));
-                xmlelement                 
--------------------------------------------
- <element><nested>stuff</nested></element>
-(1 row)
-
-SELECT xmlelement(name employee, xmlforest(name, age, salary as pay)) FROM emp;
-                              xmlelement                              
-----------------------------------------------------------------------
- <employee><name>sharon</name><age>25</age><pay>1000</pay></employee>
- <employee><name>sam</name><age>30</age><pay>2000</pay></employee>
- <employee><name>bill</name><age>20</age><pay>1000</pay></employee>
- <employee><name>jeff</name><age>23</age><pay>600</pay></employee>
- <employee><name>cim</name><age>30</age><pay>400</pay></employee>
- <employee><name>linda</name><age>19</age><pay>100</pay></employee>
-(6 rows)
-
-SELECT xmlelement(name duplicate, xmlattributes(1 as a, 2 as b, 3 as a));
-ERROR:  XML attribute name "a" appears more than once
-LINE 1: ...ment(name duplicate, xmlattributes(1 as a, 2 as b, 3 as a));
-                                                              ^
-SELECT xmlelement(name num, 37);
-  xmlelement   
----------------
- <num>37</num>
-(1 row)
-
-SELECT xmlelement(name foo, text 'bar');
-   xmlelement   
-----------------
- <foo>bar</foo>
-(1 row)
-
-SELECT xmlelement(name foo, xml 'bar');
-   xmlelement   
-----------------
- <foo>bar</foo>
-(1 row)
-
-SELECT xmlelement(name foo, text 'b<a/>r');
-       xmlelement        
--------------------------
- <foo>b&lt;a/&gt;r</foo>
-(1 row)
-
-SELECT xmlelement(name foo, xml 'b<a/>r');
-    xmlelement     
--------------------
- <foo>b<a/>r</foo>
-(1 row)
-
-SELECT xmlelement(name foo, array[1, 2, 3]);
-                               xmlelement                                
--------------------------------------------------------------------------
- <foo><element>1</element><element>2</element><element>3</element></foo>
-(1 row)
-
-SET xmlbinary TO base64;
-SELECT xmlelement(name foo, bytea 'bar');
-   xmlelement    
------------------
- <foo>YmFy</foo>
-(1 row)
-
-SET xmlbinary TO hex;
-SELECT xmlelement(name foo, bytea 'bar');
-    xmlelement     
--------------------
- <foo>626172</foo>
-(1 row)
-
-SELECT xmlelement(name foo, xmlattributes(true as bar));
-    xmlelement     
--------------------
- <foo bar="true"/>
-(1 row)
-
-SELECT xmlelement(name foo, xmlattributes('2009-04-09 00:24:37'::timestamp as bar));
-            xmlelement            
-----------------------------------
- <foo bar="2009-04-09T00:24:37"/>
-(1 row)
-
-SELECT xmlelement(name foo, xmlattributes('infinity'::timestamp as bar));
-ERROR:  timestamp out of range
-DETAIL:  XML does not support infinite timestamp values.
-SELECT xmlelement(name foo, xmlattributes('<>&"''' as funny, xml 'b<a/>r' as funnier));
-                         xmlelement                         
-------------------------------------------------------------
- <foo funny="&lt;&gt;&amp;&quot;'" funnier="b&lt;a/&gt;r"/>
-(1 row)
-
-SELECT xmlparse(content '');
- xmlparse 
-----------
- 
-(1 row)
-
-SELECT xmlparse(content '  ');
- xmlparse 
-----------
-   
-(1 row)
-
-SELECT xmlparse(content 'abc');
- xmlparse 
-----------
- abc
-(1 row)
-
-SELECT xmlparse(content '<abc>x</abc>');
-   xmlparse   
---------------
- <abc>x</abc>
-(1 row)
-
-SELECT xmlparse(content '<invalidentity>&</invalidentity>');
-ERROR:  invalid XML content
-DETAIL:  line 1: xmlParseEntityRef: no name
-<invalidentity>&</invalidentity>
-                ^
-SELECT xmlparse(content '<undefinedentity>&idontexist;</undefinedentity>');
-ERROR:  invalid XML content
-DETAIL:  line 1: Entity 'idontexist' not defined
-<undefinedentity>&idontexist;</undefinedentity>
-                             ^
-SELECT xmlparse(content '<invalidns xmlns=''&lt;''/>');
-         xmlparse          
----------------------------
- <invalidns xmlns='&lt;'/>
-(1 row)
-
-SELECT xmlparse(content '<relativens xmlns=''relative''/>');
-            xmlparse            
---------------------------------
- <relativens xmlns='relative'/>
-(1 row)
-
-SELECT xmlparse(content '<twoerrors>&idontexist;</unbalanced>');
-ERROR:  invalid XML content
-DETAIL:  line 1: Entity 'idontexist' not defined
-<twoerrors>&idontexist;</unbalanced>
-                       ^
-line 1: Opening and ending tag mismatch: twoerrors line 1 and unbalanced
-SELECT xmlparse(content '<nosuchprefix:tag/>');
-      xmlparse       
----------------------
- <nosuchprefix:tag/>
-(1 row)
-
-SELECT xmlparse(document '   ');
-ERROR:  invalid XML document
-DETAIL:  line 1: Start tag expected, '<' not found
-SELECT xmlparse(document 'abc');
-ERROR:  invalid XML document
-DETAIL:  line 1: Start tag expected, '<' not found
-abc
-^
-SELECT xmlparse(document '<abc>x</abc>');
-   xmlparse   
---------------
- <abc>x</abc>
-(1 row)
-
-SELECT xmlparse(document '<invalidentity>&</abc>');
-ERROR:  invalid XML document
-DETAIL:  line 1: xmlParseEntityRef: no name
-<invalidentity>&</abc>
-                ^
-line 1: Opening and ending tag mismatch: invalidentity line 1 and abc
-SELECT xmlparse(document '<undefinedentity>&idontexist;</abc>');
-ERROR:  invalid XML document
-DETAIL:  line 1: Entity 'idontexist' not defined
-<undefinedentity>&idontexist;</abc>
-                             ^
-line 1: Opening and ending tag mismatch: undefinedentity line 1 and abc
-SELECT xmlparse(document '<invalidns xmlns=''&lt;''/>');
-         xmlparse          
----------------------------
- <invalidns xmlns='&lt;'/>
-(1 row)
-
-SELECT xmlparse(document '<relativens xmlns=''relative''/>');
-            xmlparse            
---------------------------------
- <relativens xmlns='relative'/>
-(1 row)
-
-SELECT xmlparse(document '<twoerrors>&idontexist;</unbalanced>');
-ERROR:  invalid XML document
-DETAIL:  line 1: Entity 'idontexist' not defined
-<twoerrors>&idontexist;</unbalanced>
-                       ^
-line 1: Opening and ending tag mismatch: twoerrors line 1 and unbalanced
-SELECT xmlparse(document '<nosuchprefix:tag/>');
-      xmlparse       
----------------------
- <nosuchprefix:tag/>
-(1 row)
-
-SELECT xmlpi(name foo);
-  xmlpi  
----------
- <?foo?>
-(1 row)
-
-SELECT xmlpi(name xml);
-ERROR:  invalid XML processing instruction
-DETAIL:  XML processing instruction target name cannot be "xml".
-SELECT xmlpi(name xmlstuff);
-    xmlpi     
---------------
- <?xmlstuff?>
-(1 row)
-
-SELECT xmlpi(name foo, 'bar');
-    xmlpi    
--------------
- <?foo bar?>
-(1 row)
-
-SELECT xmlpi(name foo, 'in?>valid');
-ERROR:  invalid XML processing instruction
-DETAIL:  XML processing instruction cannot contain "?>".
-SELECT xmlpi(name foo, null);
- xmlpi 
--------
- 
-(1 row)
-
-SELECT xmlpi(name xml, null);
-ERROR:  invalid XML processing instruction
-DETAIL:  XML processing instruction target name cannot be "xml".
-SELECT xmlpi(name xmlstuff, null);
- xmlpi 
--------
- 
-(1 row)
-
-SELECT xmlpi(name "xml-stylesheet", 'href="mystyle.css" type="text/css"');
-                         xmlpi                         
--------------------------------------------------------
- <?xml-stylesheet href="mystyle.css" type="text/css"?>
-(1 row)
-
-SELECT xmlpi(name foo, '   bar');
-    xmlpi    
--------------
- <?foo bar?>
-(1 row)
-
-SELECT xmlroot(xml '<foo/>', version no value, standalone no value);
- xmlroot 
----------
- <foo/>
-(1 row)
-
-SELECT xmlroot(xml '<foo/>', version '2.0');
-           xmlroot           
------------------------------
- <?xml version="2.0"?><foo/>
-(1 row)
-
-SELECT xmlroot(xml '<foo/>', version no value, standalone yes);
-                   xmlroot                    
-----------------------------------------------
- <?xml version="1.0" standalone="yes"?><foo/>
-(1 row)
-
-SELECT xmlroot(xml '<?xml version="1.1"?><foo/>', version no value, standalone yes);
-                   xmlroot                    
-----------------------------------------------
- <?xml version="1.0" standalone="yes"?><foo/>
-(1 row)
-
-SELECT xmlroot(xmlroot(xml '<foo/>', version '1.0'), version '1.1', standalone no);
-                   xmlroot                   
----------------------------------------------
- <?xml version="1.1" standalone="no"?><foo/>
-(1 row)
-
-SELECT xmlroot('<?xml version="1.1" standalone="yes"?><foo/>', version no value, standalone no);
-                   xmlroot                   
----------------------------------------------
- <?xml version="1.0" standalone="no"?><foo/>
-(1 row)
-
-SELECT xmlroot('<?xml version="1.1" standalone="yes"?><foo/>', version no value, standalone no value);
- xmlroot 
----------
- <foo/>
-(1 row)
-
-SELECT xmlroot('<?xml version="1.1" standalone="yes"?><foo/>', version no value);
-                   xmlroot                    
-----------------------------------------------
- <?xml version="1.0" standalone="yes"?><foo/>
-(1 row)
-
-SELECT xmlroot (
-  xmlelement (
-    name gazonk,
-    xmlattributes (
-      'val' AS name,
-      1 + 1 AS num
-    ),
-    xmlelement (
-      NAME qux,
-      'foo'
-    )
-  ),
-  version '1.0',
-  standalone yes
-);
-                                         xmlroot                                          
-------------------------------------------------------------------------------------------
- <?xml version="1.0" standalone="yes"?><gazonk name="val" num="2"><qux>foo</qux></gazonk>
-(1 row)
-
-SELECT xmlserialize(content data as character varying(20)) FROM xmltest;
-    xmlserialize    
---------------------
- <value>one</value>
- <value>two</value>
-(2 rows)
-
-SELECT xmlserialize(content 'good' as char(10));
- xmlserialize 
---------------
- good      
-(1 row)
-
-SELECT xmlserialize(document 'bad' as text);
-ERROR:  not an XML document
--- indent
-SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val></bar></foo>' AS text INDENT);
-      xmlserialize       
--------------------------
- <foo>                  +
-   <bar>                +
-     <val x="y">42</val>+
-   </bar>               +
- </foo>
-(1 row)
-
-SELECT xmlserialize(CONTENT  '<foo><bar><val x="y">42</val></bar></foo>' AS text INDENT);
-      xmlserialize       
--------------------------
- <foo>                  +
-   <bar>                +
-     <val x="y">42</val>+
-   </bar>               +
- </foo>
-(1 row)
-
--- no indent
-SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val></bar></foo>' AS text NO INDENT);
-               xmlserialize                
--------------------------------------------
- <foo><bar><val x="y">42</val></bar></foo>
-(1 row)
-
-SELECT xmlserialize(CONTENT  '<foo><bar><val x="y">42</val></bar></foo>' AS text NO INDENT);
-               xmlserialize                
--------------------------------------------
- <foo><bar><val x="y">42</val></bar></foo>
-(1 row)
-
--- indent non singly-rooted xml
-SELECT xmlserialize(DOCUMENT '<foo>73</foo><bar><val x="y">42</val></bar>' AS text INDENT);
-ERROR:  not an XML document
-SELECT xmlserialize(CONTENT  '<foo>73</foo><bar><val x="y">42</val></bar>' AS text INDENT);
-     xmlserialize      
------------------------
- <foo>73</foo>        +
- <bar>                +
-   <val x="y">42</val>+
- </bar>
-(1 row)
-
--- indent non singly-rooted xml with mixed contents
-SELECT xmlserialize(DOCUMENT 'text node<foo>73</foo>text node<bar><val x="y">42</val></bar>' AS text INDENT);
-ERROR:  not an XML document
-SELECT xmlserialize(CONTENT  'text node<foo>73</foo>text node<bar><val x="y">42</val></bar>' AS text INDENT);
-      xmlserialize      
-------------------------
- text node             +
- <foo>73</foo>text node+
- <bar>                 +
-   <val x="y">42</val> +
- </bar>
-(1 row)
-
--- indent singly-rooted xml with mixed contents
-SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val><val x="y">text node<val>73</val></val></bar></foo>' AS text INDENT);
-                xmlserialize                 
----------------------------------------------
- <foo>                                      +
-   <bar>                                    +
-     <val x="y">42</val>                    +
-     <val x="y">text node<val>73</val></val>+
-   </bar>                                   +
- </foo>
-(1 row)
-
-SELECT xmlserialize(CONTENT  '<foo><bar><val x="y">42</val><val x="y">text node<val>73</val></val></bar></foo>' AS text INDENT);
-                xmlserialize                 
----------------------------------------------
- <foo>                                      +
-   <bar>                                    +
-     <val x="y">42</val>                    +
-     <val x="y">text node<val>73</val></val>+
-   </bar>                                   +
- </foo>
-(1 row)
-
--- indent empty string
-SELECT xmlserialize(DOCUMENT '' AS text INDENT);
-ERROR:  not an XML document
-SELECT xmlserialize(CONTENT  '' AS text INDENT);
- xmlserialize 
---------------
- 
-(1 row)
-
--- whitespaces
-SELECT xmlserialize(DOCUMENT '  ' AS text INDENT);
-ERROR:  not an XML document
-SELECT xmlserialize(CONTENT  '  ' AS text INDENT);
- xmlserialize 
---------------
-   
-(1 row)
-
--- indent null
-SELECT xmlserialize(DOCUMENT NULL AS text INDENT);
- xmlserialize 
---------------
- 
-(1 row)
-
-SELECT xmlserialize(CONTENT  NULL AS text INDENT);
- xmlserialize 
---------------
- 
-(1 row)
-
--- indent with XML declaration
-SELECT xmlserialize(DOCUMENT '<?xml version="1.0" encoding="UTF-8"?><foo><bar><val>73</val></bar></foo>' AS text INDENT);
-              xmlserialize              
-----------------------------------------
- <?xml version="1.0" encoding="UTF-8"?>+
- <foo>                                 +
-   <bar>                               +
-     <val>73</val>                     +
-   </bar>                              +
- </foo>
-(1 row)
-
-SELECT xmlserialize(CONTENT  '<?xml version="1.0" encoding="UTF-8"?><foo><bar><val>73</val></bar></foo>' AS text INDENT);
-   xmlserialize    
--------------------
- <foo>            +
-   <bar>          +
-     <val>73</val>+
-   </bar>         +
- </foo>
-(1 row)
-
--- indent containing DOCTYPE declaration
-SELECT xmlserialize(DOCUMENT '<!DOCTYPE a><a/>' AS text INDENT);
- xmlserialize 
---------------
- <!DOCTYPE a>+
- <a/>
-(1 row)
-
-SELECT xmlserialize(CONTENT  '<!DOCTYPE a><a/>' AS text INDENT);
- xmlserialize 
---------------
- <!DOCTYPE a>+
- <a/>        +
- 
-(1 row)
-
--- indent xml with empty element
-SELECT xmlserialize(DOCUMENT '<foo><bar></bar></foo>' AS text INDENT);
- xmlserialize 
---------------
- <foo>       +
-   <bar/>    +
- </foo>
-(1 row)
-
-SELECT xmlserialize(CONTENT  '<foo><bar></bar></foo>' AS text INDENT);
- xmlserialize 
---------------
- <foo>       +
-   <bar/>    +
- </foo>
-(1 row)
-
--- 'no indent' = not using 'no indent'
-SELECT xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val></bar></foo>' AS text) = xmlserialize(DOCUMENT '<foo><bar><val x="y">42</val></bar></foo>' AS text NO INDENT);
- ?column? 
-----------
- t
-(1 row)
-
-SELECT xmlserialize(CONTENT  '<foo><bar><val x="y">42</val></bar></foo>' AS text) = xmlserialize(CONTENT '<foo><bar><val x="y">42</val></bar></foo>' AS text NO INDENT);
- ?column? 
-----------
- t
-(1 row)
-
--- indent xml strings containing blank nodes
-SELECT xmlserialize(DOCUMENT '<foo>   <bar></bar>    </foo>' AS text INDENT);
- xmlserialize 
---------------
- <foo>       +
-   <bar/>    +
- </foo>
-(1 row)
-
-SELECT xmlserialize(CONTENT  'text node<foo>    <bar></bar>   </foo>' AS text INDENT);
- xmlserialize 
---------------
- text node   +
- <foo>       +
-   <bar/>    +
- </foo>
-(1 row)
-
-SELECT xml '<foo>bar</foo>' IS DOCUMENT;
- ?column? 
-----------
- t
-(1 row)
-
-SELECT xml '<foo>bar</foo><bar>foo</bar>' IS DOCUMENT;
- ?column? 
-----------
- f
-(1 row)
-
-SELECT xml '<abc/>' IS NOT DOCUMENT;
- ?column? 
-----------
- f
-(1 row)
-
-SELECT xml 'abc' IS NOT DOCUMENT;
- ?column? 
-----------
- t
-(1 row)
-
-SELECT '<>' IS NOT DOCUMENT;
-ERROR:  invalid XML content
-LINE 1: SELECT '<>' IS NOT DOCUMENT;
-               ^
-DETAIL:  line 1: StartTag: invalid element name
-<>
- ^
-SELECT xmlagg(data) FROM xmltest;
-                xmlagg                
---------------------------------------
- <value>one</value><value>two</value>
-(1 row)
-
-SELECT xmlagg(data) FROM xmltest WHERE id > 10;
- xmlagg 
---------
- 
-(1 row)
-
-SELECT xmlelement(name employees, xmlagg(xmlelement(name name, name))) FROM emp;
-                                                           xmlelement                                                           
---------------------------------------------------------------------------------------------------------------------------------
- <employees><name>sharon</name><name>sam</name><name>bill</name><name>jeff</name><name>cim</name><name>linda</name></employees>
-(1 row)
-
--- Check mapping SQL identifier to XML name
-SELECT xmlpi(name ":::_xml_abc135.%-&_");
-                      xmlpi                      
--------------------------------------------------
- <?_x003A_::_x005F_xml_abc135._x0025_-_x0026__?>
-(1 row)
-
-SELECT xmlpi(name "123");
-     xmlpi     
----------------
- <?_x0031_23?>
-(1 row)
-
-PREPARE foo (xml) AS SELECT xmlconcat('<foo/>', $1);
-SET XML OPTION DOCUMENT;
-EXECUTE foo ('<bar/>');
-  xmlconcat   
---------------
- <foo/><bar/>
-(1 row)
-
-EXECUTE foo ('bad');
-ERROR:  invalid XML document
-LINE 1: EXECUTE foo ('bad');
-                     ^
-DETAIL:  line 1: Start tag expected, '<' not found
-bad
-^
-SELECT xml '<!DOCTYPE a><a/><b/>';
-ERROR:  invalid XML document
-LINE 1: SELECT xml '<!DOCTYPE a><a/><b/>';
-                   ^
-DETAIL:  line 1: Extra content at the end of the document
-<!DOCTYPE a><a/><b/>
-                ^
-SET XML OPTION CONTENT;
-EXECUTE foo ('<bar/>');
-  xmlconcat   
---------------
- <foo/><bar/>
-(1 row)
-
-EXECUTE foo ('good');
- xmlconcat  
-------------
- <foo/>good
-(1 row)
-
-SELECT xml '<!-- in SQL:2006+ a doc is content too--> <?y z?> <!DOCTYPE a><a/>';
-                                xml                                 
---------------------------------------------------------------------
- <!-- in SQL:2006+ a doc is content too--> <?y z?> <!DOCTYPE a><a/>
-(1 row)
-
-SELECT xml '<?xml version="1.0"?> <!-- hi--> <!DOCTYPE a><a/>';
-             xml              
-------------------------------
-  <!-- hi--> <!DOCTYPE a><a/>
-(1 row)
-
-SELECT xml '<!DOCTYPE a><a/>';
-       xml        
-------------------
- <!DOCTYPE a><a/>
-(1 row)
-
-SELECT xml '<!-- hi--> oops <!DOCTYPE a><a/>';
-ERROR:  invalid XML content
-LINE 1: SELECT xml '<!-- hi--> oops <!DOCTYPE a><a/>';
-                   ^
-DETAIL:  line 1: StartTag: invalid element name
-<!-- hi--> oops <!DOCTYPE a><a/>
-                 ^
-SELECT xml '<!-- hi--> <oops/> <!DOCTYPE a><a/>';
-ERROR:  invalid XML content
-LINE 1: SELECT xml '<!-- hi--> <oops/> <!DOCTYPE a><a/>';
-                   ^
-DETAIL:  line 1: StartTag: invalid element name
-<!-- hi--> <oops/> <!DOCTYPE a><a/>
-                    ^
-SELECT xml '<!DOCTYPE a><a/><b/>';
-ERROR:  invalid XML content
-LINE 1: SELECT xml '<!DOCTYPE a><a/><b/>';
-                   ^
-DETAIL:  line 1: Extra content at the end of the document
-<!DOCTYPE a><a/><b/>
-                ^
--- Test backwards parsing
-CREATE VIEW xmlview1 AS SELECT xmlcomment('test');
-CREATE VIEW xmlview2 AS SELECT xmlconcat('hello', 'you');
-CREATE VIEW xmlview3 AS SELECT xmlelement(name element, xmlattributes (1 as ":one:", 'deuce' as two), 'content&');
-CREATE VIEW xmlview4 AS SELECT xmlelement(name employee, xmlforest(name, age, salary as pay)) FROM emp;
-CREATE VIEW xmlview5 AS SELECT xmlparse(content '<abc>x</abc>');
-CREATE VIEW xmlview6 AS SELECT xmlpi(name foo, 'bar');
-CREATE VIEW xmlview7 AS SELECT xmlroot(xml '<foo/>', version no value, standalone yes);
-CREATE VIEW xmlview8 AS SELECT xmlserialize(content 'good' as char(10));
-CREATE VIEW xmlview9 AS SELECT xmlserialize(content 'good' as text);
-CREATE VIEW xmlview10 AS SELECT xmlserialize(document '<foo><bar>42</bar></foo>' AS text indent);
-CREATE VIEW xmlview11 AS SELECT xmlserialize(document '<foo><bar>42</bar></foo>' AS character varying no indent);
-SELECT table_name, view_definition FROM information_schema.views
-  WHERE table_name LIKE 'xmlview%' ORDER BY 1;
- table_name |                                                            view_definition                                                            
-------------+---------------------------------------------------------------------------------------------------------------------------------------
- xmlview1   |  SELECT xmlcomment('test'::text) AS xmlcomment;
- xmlview10  |  SELECT XMLSERIALIZE(DOCUMENT '<foo><bar>42</bar></foo>'::xml AS text INDENT) AS "xmlserialize";
- xmlview11  |  SELECT (XMLSERIALIZE(DOCUMENT '<foo><bar>42</bar></foo>'::xml AS character varying NO INDENT))::character varying AS "xmlserialize";
- xmlview2   |  SELECT XMLCONCAT('hello'::xml, 'you'::xml) AS "xmlconcat";
- xmlview3   |  SELECT XMLELEMENT(NAME element, XMLATTRIBUTES(1 AS ":one:", 'deuce' AS two), 'content&') AS "xmlelement";
- xmlview4   |  SELECT XMLELEMENT(NAME employee, XMLFOREST(name AS name, age AS age, salary AS pay)) AS "xmlelement"                                +
-            |    FROM emp;
- xmlview5   |  SELECT XMLPARSE(CONTENT '<abc>x</abc>'::text STRIP WHITESPACE) AS "xmlparse";
- xmlview6   |  SELECT XMLPI(NAME foo, 'bar'::text) AS "xmlpi";
- xmlview7   |  SELECT XMLROOT('<foo/>'::xml, VERSION NO VALUE, STANDALONE YES) AS "xmlroot";
- xmlview8   |  SELECT (XMLSERIALIZE(CONTENT 'good'::xml AS character(10) NO INDENT))::character(10) AS "xmlserialize";
- xmlview9   |  SELECT XMLSERIALIZE(CONTENT 'good'::xml AS text NO INDENT) AS "xmlserialize";
-(11 rows)
-
--- Text XPath expressions evaluation
-SELECT xpath('/value', data) FROM xmltest;
-        xpath         
-----------------------
- {<value>one</value>}
- {<value>two</value>}
-(2 rows)
-
-SELECT xpath(NULL, NULL) IS NULL FROM xmltest;
- ?column? 
-----------
- t
- t
-(2 rows)
-
-SELECT xpath('', '<!-- error -->');
-ERROR:  empty XPath expression
-CONTEXT:  SQL function "xpath" statement 1
-SELECT xpath('//text()', '<local:data xmlns:local="http://127.0.0.1"><local:piece id="1">number one</local:piece><local:piece id="2" /></local:data>');
-     xpath      
-----------------
- {"number one"}
-(1 row)
-
-SELECT xpath('//loc:piece/@id', '<local:data xmlns:local="http://127.0.0.1"><local:piece id="1">number one</local:piece><local:piece id="2" /></local:data>', ARRAY[ARRAY['loc', 'http://127.0.0.1']]);
- xpath 
--------
- {1,2}
-(1 row)
-
-SELECT xpath('//loc:piece', '<local:data xmlns:local="http://127.0.0.1"><local:piece id="1">number one</local:piece><local:piece id="2" /></local:data>', ARRAY[ARRAY['loc', 'http://127.0.0.1']]);
-                                                                     xpath                                                                      
-------------------------------------------------------------------------------------------------------------------------------------------------
- {"<local:piece xmlns:local=\"http://127.0.0.1\" id=\"1\">number one</local:piece>","<local:piece xmlns:local=\"http://127.0.0.1\" id=\"2\"/>"}
-(1 row)
-
-SELECT xpath('//loc:piece', '<local:data xmlns:local="http://127.0.0.1" xmlns="http://127.0.0.2"><local:piece id="1"><internal>number one</internal><internal2/></local:piece><local:piece id="2" /></local:data>', ARRAY[ARRAY['loc', 'http://127.0.0.1']]);
-                                                                                                   xpath                                                                                                    
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- {"<local:piece xmlns:local=\"http://127.0.0.1\" xmlns=\"http://127.0.0.2\" id=\"1\"><internal>number one</internal><internal2/></local:piece>","<local:piece xmlns:local=\"http://127.0.0.1\" id=\"2\"/>"}
-(1 row)
-
-SELECT xpath('//b', '<a>one <b>two</b> three <b>etc</b></a>');
-          xpath          
--------------------------
- {<b>two</b>,<b>etc</b>}
-(1 row)
-
-SELECT xpath('//text()', '<root>&lt;</root>');
- xpath  
---------
- {&lt;}
-(1 row)
-
-SELECT xpath('//@value', '<root value="&lt;"/>');
- xpath  
---------
- {&lt;}
-(1 row)
-
-SELECT xpath('''<<invalid>>''', '<root/>');
-           xpath           
----------------------------
- {&lt;&lt;invalid&gt;&gt;}
-(1 row)
-
-SELECT xpath('count(//*)', '<root><sub/><sub/></root>');
- xpath 
--------
- {3}
-(1 row)
-
-SELECT xpath('count(//*)=0', '<root><sub/><sub/></root>');
-  xpath  
----------
- {false}
-(1 row)
-
-SELECT xpath('count(//*)=3', '<root><sub/><sub/></root>');
- xpath  
---------
- {true}
-(1 row)
-
-SELECT xpath('name(/*)', '<root><sub/><sub/></root>');
- xpath  
---------
- {root}
-(1 row)
-
-SELECT xpath('/nosuchtag', '<root/>');
- xpath 
--------
- {}
-(1 row)
-
-SELECT xpath('root', '<root/>');
-   xpath   
------------
- {<root/>}
-(1 row)
-
-SELECT xpath('//namespace::foo', '<root xmlns:foo="http://127.0.0.1"/>');
-       xpath        
---------------------
- {http://127.0.0.1}
-(1 row)
-
--- Round-trip non-ASCII data through xpath().
-DO $$
-DECLARE
-  xml_declaration text := '<?xml version="1.0" encoding="ISO-8859-1"?>';
-  degree_symbol text;
-  res xml[];
-BEGIN
-  -- Per the documentation, except when the server encoding is UTF8, xpath()
-  -- may not work on non-ASCII data.  The untranslatable_character and
-  -- undefined_function traps below, currently dead code, will become relevant
-  -- if we remove this limitation.
-  IF current_setting('server_encoding') <> 'UTF8' THEN
-    RAISE LOG 'skip: encoding % unsupported for xpath',
-      current_setting('server_encoding');
-    RETURN;
-  END IF;
-
-  degree_symbol := convert_from('\xc2b0', 'UTF8');
-  res := xpath('text()', (xml_declaration ||
-    '<x>' || degree_symbol || '</x>')::xml);
-  IF degree_symbol <> res[1]::text THEN
-    RAISE 'expected % (%), got % (%)',
-      degree_symbol, convert_to(degree_symbol, 'UTF8'),
-      res[1], convert_to(res[1]::text, 'UTF8');
-  END IF;
-EXCEPTION
-  -- character with byte sequence 0xc2 0xb0 in encoding "UTF8" has no equivalent in encoding "LATIN8"
-  WHEN undefined_function
-  -- unsupported XML feature
-  OR feature_not_supported THEN
-    RAISE LOG 'skip: %', SQLERRM;
-END
-$$;
--- Test xmlexists and xpath_exists
-SELECT xmlexists('//town[text() = ''Toronto'']' PASSING BY REF '<towns><town>Bidford-on-Avon</town><town>Cwmbran</town><town>Bristol</town></towns>');
- xmlexists 
------------
- f
-(1 row)
-
-SELECT xmlexists('//town[text() = ''Cwmbran'']' PASSING BY REF '<towns><town>Bidford-on-Avon</town><town>Cwmbran</town><town>Bristol</town></towns>');
- xmlexists 
------------
- t
-(1 row)
-
-SELECT xmlexists('count(/nosuchtag)' PASSING BY REF '<root/>');
- xmlexists 
------------
- t
-(1 row)
-
-SELECT xpath_exists('//town[text() = ''Toronto'']','<towns><town>Bidford-on-Avon</town><town>Cwmbran</town><town>Bristol</town></towns>'::xml);
- xpath_exists 
---------------
- f
-(1 row)
-
-SELECT xpath_exists('//town[text() = ''Cwmbran'']','<towns><town>Bidford-on-Avon</town><town>Cwmbran</town><town>Bristol</town></towns>'::xml);
- xpath_exists 
---------------
- t
-(1 row)
-
-SELECT xpath_exists('count(/nosuchtag)', '<root/>'::xml);
- xpath_exists 
---------------
- t
-(1 row)
-
-INSERT INTO xmltest VALUES (4, '<menu><beers><name>Budvar</name><cost>free</cost><name>Carling</name><cost>lots</cost></beers></menu>'::xml);
-INSERT INTO xmltest VALUES (5, '<menu><beers><name>Molson</name><cost>free</cost><name>Carling</name><cost>lots</cost></beers></menu>'::xml);
-INSERT INTO xmltest VALUES (6, '<myns:menu xmlns:myns="http://myns.com"><myns:beers><myns:name>Budvar</myns:name><myns:cost>free</myns:cost><myns:name>Carling</myns:name><myns:cost>lots</myns:cost></myns:beers></myns:menu>'::xml);
-INSERT INTO xmltest VALUES (7, '<myns:menu xmlns:myns="http://myns.com"><myns:beers><myns:name>Molson</myns:name><myns:cost>free</myns:cost><myns:name>Carling</myns:name><myns:cost>lots</myns:cost></myns:beers></myns:menu>'::xml);
-SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beer' PASSING data);
- count 
--------
-     0
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beer' PASSING BY REF data BY REF);
- count 
--------
-     0
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beers' PASSING BY REF data);
- count 
--------
-     2
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xmlexists('/menu/beers/name[text() = ''Molson'']' PASSING BY REF data);
- count 
--------
-     1
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/menu/beer',data);
- count 
--------
-     0
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/menu/beers',data);
- count 
--------
-     2
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/menu/beers/name[text() = ''Molson'']',data);
- count 
--------
-     1
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/myns:menu/myns:beer',data,ARRAY[ARRAY['myns','http://myns.com']]);
- count 
--------
-     0
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/myns:menu/myns:beers',data,ARRAY[ARRAY['myns','http://myns.com']]);
- count 
--------
-     2
-(1 row)
-
-SELECT COUNT(id) FROM xmltest WHERE xpath_exists('/myns:menu/myns:beers/myns:name[text() = ''Molson'']',data,ARRAY[ARRAY['myns','http://myns.com']]);
- count 
--------
-     1
-(1 row)
-
-CREATE TABLE query ( expr TEXT );
-INSERT INTO query VALUES ('/menu/beers/cost[text() = ''lots'']');
-SELECT COUNT(id) FROM xmltest, query WHERE xmlexists(expr PASSING BY REF data);
- count 
--------
-     2
-(1 row)
-
--- Test xml_is_well_formed and variants
-SELECT xml_is_well_formed_document('<foo>bar</foo>');
- xml_is_well_formed_document 
------------------------------
- t
-(1 row)
-
-SELECT xml_is_well_formed_document('abc');
- xml_is_well_formed_document 
------------------------------
- f
-(1 row)
-
-SELECT xml_is_well_formed_content('<foo>bar</foo>');
- xml_is_well_formed_content 
-----------------------------
- t
-(1 row)
-
-SELECT xml_is_well_formed_content('abc');
- xml_is_well_formed_content 
-----------------------------
- t
-(1 row)
-
-SET xmloption TO DOCUMENT;
-SELECT xml_is_well_formed('abc');
- xml_is_well_formed 
---------------------
- f
-(1 row)
-
-SELECT xml_is_well_formed('<>');
- xml_is_well_formed 
---------------------
- f
-(1 row)
-
-SELECT xml_is_well_formed('<abc/>');
- xml_is_well_formed 
---------------------
- t
-(1 row)
-
-SELECT xml_is_well_formed('<foo>bar</foo>');
- xml_is_well_formed 
---------------------
- t
-(1 row)
-
-SELECT xml_is_well_formed('<foo>bar</foo');
- xml_is_well_formed 
---------------------
- f
-(1 row)
-
-SELECT xml_is_well_formed('<foo><bar>baz</foo>');
- xml_is_well_formed 
---------------------
- f
-(1 row)
-
-SELECT xml_is_well_formed('<local:data xmlns:local="http://127.0.0.1"><local:piece id="1">number one</local:piece><local:piece id="2" /></local:data>');
- xml_is_well_formed 
---------------------
- t
-(1 row)
-
-SELECT xml_is_well_formed('<pg:foo xmlns:pg="http://postgresql.org/stuff">bar</my:foo>');
- xml_is_well_formed 
---------------------
- f
-(1 row)
-
-SELECT xml_is_well_formed('<pg:foo xmlns:pg="http://postgresql.org/stuff">bar</pg:foo>');
- xml_is_well_formed 
---------------------
- t
-(1 row)
-
-SELECT xml_is_well_formed('<invalidentity>&</abc>');
- xml_is_well_formed 
---------------------
- f
-(1 row)
-
-SELECT xml_is_well_formed('<undefinedentity>&idontexist;</abc>');
- xml_is_well_formed 
---------------------
- f
-(1 row)
-
-SELECT xml_is_well_formed('<invalidns xmlns=''&lt;''/>');
- xml_is_well_formed 
---------------------
- t
-(1 row)
-
-SELECT xml_is_well_formed('<relativens xmlns=''relative''/>');
- xml_is_well_formed 
---------------------
- t
-(1 row)
-
-SELECT xml_is_well_formed('<twoerrors>&idontexist;</unbalanced>');
- xml_is_well_formed 
---------------------
- f
-(1 row)
-
-SET xmloption TO CONTENT;
-SELECT xml_is_well_formed('abc');
- xml_is_well_formed 
---------------------
- t
-(1 row)
-
--- Since xpath() deals with namespaces, it's a bit stricter about
--- what's well-formed and what's not. If we don't obey these rules
--- (i.e. ignore namespace-related errors from libxml), xpath()
--- fails in subtle ways. The following would for example produce
--- the xml value
---   <invalidns xmlns='<'/>
--- which is invalid because '<' may not appear un-escaped in
--- attribute values.
--- Since different libxml versions emit slightly different
--- error messages, we suppress the DETAIL in this test.
-\set VERBOSITY terse
-SELECT xpath('/*', '<invalidns xmlns=''&lt;''/>');
-ERROR:  could not parse XML document
-\set VERBOSITY default
--- Again, the XML isn't well-formed for namespace purposes
-SELECT xpath('/*', '<nosuchprefix:tag/>');
-ERROR:  could not parse XML document
-DETAIL:  line 1: Namespace prefix nosuchprefix on tag is not defined
-<nosuchprefix:tag/>
-                 ^
-CONTEXT:  SQL function "xpath" statement 1
--- XPath deprecates relative namespaces, but they're not supposed to
--- throw an error, only a warning.
-SELECT xpath('/*', '<relativens xmlns=''relative''/>');
-WARNING:  line 1: xmlns: URI relative is not absolute
-<relativens xmlns='relative'/>
-                            ^
-                xpath                 
---------------------------------------
- {"<relativens xmlns=\"relative\"/>"}
-(1 row)
-
--- External entity references should not leak filesystem information.
-SELECT XMLPARSE(DOCUMENT '<!DOCTYPE foo [<!ENTITY c SYSTEM "/etc/passwd">]><foo>&c;</foo>');
-                            xmlparse                             
------------------------------------------------------------------
- <!DOCTYPE foo [<!ENTITY c SYSTEM "/etc/passwd">]><foo>&c;</foo>
-(1 row)
-
-SELECT XMLPARSE(DOCUMENT '<!DOCTYPE foo [<!ENTITY c SYSTEM "/etc/no.such.file">]><foo>&c;</foo>');
-                               xmlparse                                
------------------------------------------------------------------------
- <!DOCTYPE foo [<!ENTITY c SYSTEM "/etc/no.such.file">]><foo>&c;</foo>
-(1 row)
-
--- This might or might not load the requested DTD, but it mustn't throw error.
-SELECT XMLPARSE(DOCUMENT '<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"><chapter>&nbsp;</chapter>');
-                                                                       xmlparse                                                                       
-------------------------------------------------------------------------------------------------------------------------------------------------------
- <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"><chapter>&nbsp;</chapter>
-(1 row)
-
--- XMLPATH tests
-CREATE TABLE xmldata(data xml);
-INSERT INTO xmldata VALUES('<ROWS>
-<ROW id="1">
-  <COUNTRY_ID>AU</COUNTRY_ID>
-  <COUNTRY_NAME>Australia</COUNTRY_NAME>
-  <REGION_ID>3</REGION_ID>
-</ROW>
-<ROW id="2">
-  <COUNTRY_ID>CN</COUNTRY_ID>
-  <COUNTRY_NAME>China</COUNTRY_NAME>
-  <REGION_ID>3</REGION_ID>
-</ROW>
-<ROW id="3">
-  <COUNTRY_ID>HK</COUNTRY_ID>
-  <COUNTRY_NAME>HongKong</COUNTRY_NAME>
-  <REGION_ID>3</REGION_ID>
-</ROW>
-<ROW id="4">
-  <COUNTRY_ID>IN</COUNTRY_ID>
-  <COUNTRY_NAME>India</COUNTRY_NAME>
-  <REGION_ID>3</REGION_ID>
-</ROW>
-<ROW id="5">
-  <COUNTRY_ID>JP</COUNTRY_ID>
-  <COUNTRY_NAME>Japan</COUNTRY_NAME>
-  <REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>
-</ROW>
-<ROW id="6">
-  <COUNTRY_ID>SG</COUNTRY_ID>
-  <COUNTRY_NAME>Singapore</COUNTRY_NAME>
-  <REGION_ID>3</REGION_ID><SIZE unit="km">791</SIZE>
-</ROW>
-</ROWS>');
--- XMLTABLE with columns
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME/text()' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
- id | _id | country_name | country_id | region_id | size | unit | premier_name  
-----+-----+--------------+------------+-----------+------+------+---------------
-  1 |   1 | Australia    | AU         |         3 |      |      | not specified
-  2 |   2 | China        | CN         |         3 |      |      | not specified
-  3 |   3 | HongKong     | HK         |         3 |      |      | not specified
-  4 |   4 | India        | IN         |         3 |      |      | not specified
-  5 |   5 | Japan        | JP         |         3 |      |      | Sinzo Abe
-  6 |   6 | Singapore    | SG         |         3 |  791 | km   | not specified
-(6 rows)
-
-CREATE VIEW xmltableview1 AS SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME/text()' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
-SELECT * FROM xmltableview1;
- id | _id | country_name | country_id | region_id | size | unit | premier_name  
-----+-----+--------------+------------+-----------+------+------+---------------
-  1 |   1 | Australia    | AU         |         3 |      |      | not specified
-  2 |   2 | China        | CN         |         3 |      |      | not specified
-  3 |   3 | HongKong     | HK         |         3 |      |      | not specified
-  4 |   4 | India        | IN         |         3 |      |      | not specified
-  5 |   5 | Japan        | JP         |         3 |      |      | Sinzo Abe
-  6 |   6 | Singapore    | SG         |         3 |  791 | km   | not specified
-(6 rows)
-
-\sv xmltableview1
-CREATE OR REPLACE VIEW public.xmltableview1 AS
- SELECT "xmltable".id,
-    "xmltable"._id,
-    "xmltable".country_name,
-    "xmltable".country_id,
-    "xmltable".region_id,
-    "xmltable".size,
-    "xmltable".unit,
-    "xmltable".premier_name
-   FROM ( SELECT xmldata.data
-           FROM xmldata) x,
-    LATERAL XMLTABLE(('/ROWS/ROW'::text) PASSING (x.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME/text()'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
-EXPLAIN (COSTS OFF) SELECT * FROM xmltableview1;
-               QUERY PLAN                
------------------------------------------
- Nested Loop
-   ->  Seq Scan on xmldata
-   ->  Table Function Scan on "xmltable"
-(3 rows)
-
-EXPLAIN (COSTS OFF, VERBOSE) SELECT * FROM xmltableview1;
-                                                                                                                                                                                                                            QUERY PLAN                                                                                                                                                                                                                            
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- Nested Loop
-   Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-   ->  Seq Scan on public.xmldata
-         Output: xmldata.data
-   ->  Table Function Scan on "xmltable"
-         Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-         Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME/text()'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
-(7 rows)
-
--- errors
-SELECT * FROM XMLTABLE (ROW () PASSING null COLUMNS v1 timestamp) AS f (v1, v2);
-ERROR:  XMLTABLE function has 1 columns available but 2 columns specified
-SELECT * FROM XMLTABLE (ROW () PASSING null COLUMNS v1 timestamp __pg__is_not_null 1) AS f (v1);
-ERROR:  option name "__pg__is_not_null" cannot be used in XMLTABLE
-LINE 1: ...MLTABLE (ROW () PASSING null COLUMNS v1 timestamp __pg__is_n...
-                                                             ^
--- XMLNAMESPACES tests
-SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS zz),
-                      '/zz:rows/zz:row'
-                      PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
-                      COLUMNS a int PATH 'zz:a');
- a  
-----
- 10
-(1 row)
-
-CREATE VIEW xmltableview2 AS SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS "Zz"),
-                      '/Zz:rows/Zz:row'
-                      PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
-                      COLUMNS a int PATH 'Zz:a');
-SELECT * FROM xmltableview2;
- a  
-----
- 10
-(1 row)
-
-\sv xmltableview2
-CREATE OR REPLACE VIEW public.xmltableview2 AS
- SELECT a
-   FROM XMLTABLE(XMLNAMESPACES ('http://x.y'::text AS "Zz"), ('/Zz:rows/Zz:row'::text) PASSING ('<rows xmlns="http://x.y"><row><a>10</a></row></rows>'::xml) COLUMNS a integer PATH ('Zz:a'::text))
-SELECT * FROM XMLTABLE(XMLNAMESPACES(DEFAULT 'http://x.y'),
-                      '/rows/row'
-                      PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
-                      COLUMNS a int PATH 'a');
-ERROR:  DEFAULT namespace is not supported
-SELECT * FROM XMLTABLE('.'
-                       PASSING '<foo/>'
-                       COLUMNS a text PATH 'foo/namespace::node()');
-                  a                   
---------------------------------------
- http://www.w3.org/XML/1998/namespace
-(1 row)
-
--- used in prepare statements
-PREPARE pp AS
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
-EXECUTE pp;
- id | _id | country_name | country_id | region_id | size | unit | premier_name  
-----+-----+--------------+------------+-----------+------+------+---------------
-  1 |   1 | Australia    | AU         |         3 |      |      | not specified
-  2 |   2 | China        | CN         |         3 |      |      | not specified
-  3 |   3 | HongKong     | HK         |         3 |      |      | not specified
-  4 |   4 | India        | IN         |         3 |      |      | not specified
-  5 |   5 | Japan        | JP         |         3 |      |      | Sinzo Abe
-  6 |   6 | Singapore    | SG         |         3 |  791 | km   | not specified
-(6 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int);
- COUNTRY_NAME | REGION_ID 
---------------+-----------
- India        |         3
- Japan        |         3
-(2 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY, "COUNTRY_NAME" text, "REGION_ID" int);
- id | COUNTRY_NAME | REGION_ID 
-----+--------------+-----------
-  1 | India        |         3
-  2 | Japan        |         3
-(2 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int);
- id | COUNTRY_NAME | REGION_ID 
-----+--------------+-----------
-  4 | India        |         3
-  5 | Japan        |         3
-(2 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id');
- id 
-----
-  4
-  5
-(2 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY);
- id 
-----
-  1
-  2
-(2 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH '.');
- id | COUNTRY_NAME | REGION_ID |                             rawdata                              
-----+--------------+-----------+------------------------------------------------------------------
-  4 | India        |         3 | <ROW id="4">                                                    +
-    |              |           |   <COUNTRY_ID>IN</COUNTRY_ID>                                   +
-    |              |           |   <COUNTRY_NAME>India</COUNTRY_NAME>                            +
-    |              |           |   <REGION_ID>3</REGION_ID>                                      +
-    |              |           | </ROW>
-  5 | Japan        |         3 | <ROW id="5">                                                    +
-    |              |           |   <COUNTRY_ID>JP</COUNTRY_ID>                                   +
-    |              |           |   <COUNTRY_NAME>Japan</COUNTRY_NAME>                            +
-    |              |           |   <REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>+
-    |              |           | </ROW>
-(2 rows)
-
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH './*');
- id | COUNTRY_NAME | REGION_ID |                                                           rawdata                                                           
-----+--------------+-----------+-----------------------------------------------------------------------------------------------------------------------------
-  4 | India        |         3 | <COUNTRY_ID>IN</COUNTRY_ID><COUNTRY_NAME>India</COUNTRY_NAME><REGION_ID>3</REGION_ID>
-  5 | Japan        |         3 | <COUNTRY_ID>JP</COUNTRY_ID><COUNTRY_NAME>Japan</COUNTRY_NAME><REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>
-(2 rows)
-
-SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z-->  bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text);
-       element        
-----------------------
- a1aa2a   bbbbxxxcccc
-(1 row)
-
-SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z-->  bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text PATH 'element/text()'); -- should fail
-ERROR:  more than one value returned by column XPath expression
--- CDATA test
-select * from xmltable('d/r' passing '<d><r><c><![CDATA[<hello> &"<>!<a>foo</a>]]></c></r><r><c>2</c></r></d>' columns c text);
-            c            
--------------------------
- <hello> &"<>!<a>foo</a>
- 2
-(2 rows)
-
--- XML builtin entities
-SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>&apos;</ent></a><a><ent>&quot;</ent></a><a><ent>&amp;</ent></a><a><ent>&lt;</ent></a><a><ent>&gt;</ent></a></x>' COLUMNS ent text);
- ent 
------
- '
- "
- &
- <
- >
-(5 rows)
-
-SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>&apos;</ent></a><a><ent>&quot;</ent></a><a><ent>&amp;</ent></a><a><ent>&lt;</ent></a><a><ent>&gt;</ent></a></x>' COLUMNS ent xml);
-       ent        
-------------------
- <ent>'</ent>
- <ent>"</ent>
- <ent>&amp;</ent>
- <ent>&lt;</ent>
- <ent>&gt;</ent>
-(5 rows)
-
-EXPLAIN (VERBOSE, COSTS OFF)
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
-                                                                                                                                                                                                                        QUERY PLAN                                                                                                                                                                                                                         
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- Nested Loop
-   Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-   ->  Seq Scan on public.xmldata
-         Output: xmldata.data
-   ->  Table Function Scan on "xmltable"
-         Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-         Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
-(7 rows)
-
--- test qual
-SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) WHERE "COUNTRY_NAME" = 'Japan';
- COUNTRY_NAME | REGION_ID 
---------------+-----------
- Japan        |         3
-(1 row)
-
-EXPLAIN (VERBOSE, COSTS OFF)
-SELECT f.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) AS f WHERE "COUNTRY_NAME" = 'Japan';
-                                                                                    QUERY PLAN                                                                                    
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- Nested Loop
-   Output: f."COUNTRY_NAME", f."REGION_ID"
-   ->  Seq Scan on public.xmldata
-         Output: xmldata.data
-   ->  Table Function Scan on "xmltable" f
-         Output: f."COUNTRY_NAME", f."REGION_ID"
-         Table Function Call: XMLTABLE(('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]'::text) PASSING (xmldata.data) COLUMNS "COUNTRY_NAME" text, "REGION_ID" integer)
-         Filter: (f."COUNTRY_NAME" = 'Japan'::text)
-(8 rows)
-
-EXPLAIN (VERBOSE, FORMAT JSON, COSTS OFF)
-SELECT f.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) AS f WHERE "COUNTRY_NAME" = 'Japan';
-                                                                                           QUERY PLAN                                                                                            
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- [                                                                                                                                                                                              +
-   {                                                                                                                                                                                            +
-     "Plan": {                                                                                                                                                                                  +
-       "Node Type": "Nested Loop",                                                                                                                                                              +
-       "Parallel Aware": false,                                                                                                                                                                 +
-       "Async Capable": false,                                                                                                                                                                  +
-       "Join Type": "Inner",                                                                                                                                                                    +
-       "Disabled": false,                                                                                                                                                                       +
-       "Output": ["f.\"COUNTRY_NAME\"", "f.\"REGION_ID\""],                                                                                                                                     +
-       "Inner Unique": false,                                                                                                                                                                   +
-       "Plans": [                                                                                                                                                                               +
-         {                                                                                                                                                                                      +
-           "Node Type": "Seq Scan",                                                                                                                                                             +
-           "Parent Relationship": "Outer",                                                                                                                                                      +
-           "Parallel Aware": false,                                                                                                                                                             +
-           "Async Capable": false,                                                                                                                                                              +
-           "Relation Name": "xmldata",                                                                                                                                                          +
-           "Schema": "public",                                                                                                                                                                  +
-           "Alias": "xmldata",                                                                                                                                                                  +
-           "Disabled": false,                                                                                                                                                                   +
-           "Output": ["xmldata.data"]                                                                                                                                                           +
-         },                                                                                                                                                                                     +
-         {                                                                                                                                                                                      +
-           "Node Type": "Table Function Scan",                                                                                                                                                  +
-           "Parent Relationship": "Inner",                                                                                                                                                      +
-           "Parallel Aware": false,                                                                                                                                                             +
-           "Async Capable": false,                                                                                                                                                              +
-           "Table Function Name": "xmltable",                                                                                                                                                   +
-           "Alias": "f",                                                                                                                                                                        +
-           "Disabled": false,                                                                                                                                                                   +
-           "Output": ["f.\"COUNTRY_NAME\"", "f.\"REGION_ID\""],                                                                                                                                 +
-           "Table Function Call": "XMLTABLE(('/ROWS/ROW[COUNTRY_NAME=\"Japan\" or COUNTRY_NAME=\"India\"]'::text) PASSING (xmldata.data) COLUMNS \"COUNTRY_NAME\" text, \"REGION_ID\" integer)",+
-           "Filter": "(f.\"COUNTRY_NAME\" = 'Japan'::text)"                                                                                                                                     +
-         }                                                                                                                                                                                      +
-       ]                                                                                                                                                                                        +
-     }                                                                                                                                                                                          +
-   }                                                                                                                                                                                            +
- ]
-(1 row)
-
--- should to work with more data
-INSERT INTO xmldata VALUES('<ROWS>
-<ROW id="10">
-  <COUNTRY_ID>CZ</COUNTRY_ID>
-  <COUNTRY_NAME>Czech Republic</COUNTRY_NAME>
-  <REGION_ID>2</REGION_ID><PREMIER_NAME>Milos Zeman</PREMIER_NAME>
-</ROW>
-<ROW id="11">
-  <COUNTRY_ID>DE</COUNTRY_ID>
-  <COUNTRY_NAME>Germany</COUNTRY_NAME>
-  <REGION_ID>2</REGION_ID>
-</ROW>
-<ROW id="12">
-  <COUNTRY_ID>FR</COUNTRY_ID>
-  <COUNTRY_NAME>France</COUNTRY_NAME>
-  <REGION_ID>2</REGION_ID>
-</ROW>
-</ROWS>');
-INSERT INTO xmldata VALUES('<ROWS>
-<ROW id="20">
-  <COUNTRY_ID>EG</COUNTRY_ID>
-  <COUNTRY_NAME>Egypt</COUNTRY_NAME>
-  <REGION_ID>1</REGION_ID>
-</ROW>
-<ROW id="21">
-  <COUNTRY_ID>SD</COUNTRY_ID>
-  <COUNTRY_NAME>Sudan</COUNTRY_NAME>
-  <REGION_ID>1</REGION_ID>
-</ROW>
-</ROWS>');
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
- id | _id |  country_name  | country_id | region_id | size | unit | premier_name  
-----+-----+----------------+------------+-----------+------+------+---------------
-  1 |   1 | Australia      | AU         |         3 |      |      | not specified
-  2 |   2 | China          | CN         |         3 |      |      | not specified
-  3 |   3 | HongKong       | HK         |         3 |      |      | not specified
-  4 |   4 | India          | IN         |         3 |      |      | not specified
-  5 |   5 | Japan          | JP         |         3 |      |      | Sinzo Abe
-  6 |   6 | Singapore      | SG         |         3 |  791 | km   | not specified
- 10 |   1 | Czech Republic | CZ         |         2 |      |      | Milos Zeman
- 11 |   2 | Germany        | DE         |         2 |      |      | not specified
- 12 |   3 | France         | FR         |         2 |      |      | not specified
- 20 |   1 | Egypt          | EG         |         1 |      |      | not specified
- 21 |   2 | Sudan          | SD         |         1 |      |      | not specified
-(11 rows)
-
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified')
-  WHERE region_id = 2;
- id | _id |  country_name  | country_id | region_id | size | unit | premier_name  
-----+-----+----------------+------------+-----------+------+------+---------------
- 10 |   1 | Czech Republic | CZ         |         2 |      |      | Milos Zeman
- 11 |   2 | Germany        | DE         |         2 |      |      | not specified
- 12 |   3 | France         | FR         |         2 |      |      | not specified
-(3 rows)
-
-EXPLAIN (VERBOSE, COSTS OFF)
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE',
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified')
-  WHERE region_id = 2;
-                                                                                                                                                                                                                        QUERY PLAN                                                                                                                                                                                                                         
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- Nested Loop
-   Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-   ->  Seq Scan on public.xmldata
-         Output: xmldata.data
-   ->  Table Function Scan on "xmltable"
-         Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
-         Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
-         Filter: ("xmltable".region_id = 2)
-(8 rows)
-
--- should fail, NULL value
-SELECT  xmltable.*
-   FROM (SELECT data FROM xmldata) x,
-        LATERAL XMLTABLE('/ROWS/ROW'
-                         PASSING data
-                         COLUMNS id int PATH '@id',
-                                  _id FOR ORDINALITY,
-                                  country_name text PATH 'COUNTRY_NAME' NOT NULL,
-                                  country_id text PATH 'COUNTRY_ID',
-                                  region_id int PATH 'REGION_ID',
-                                  size float PATH 'SIZE' NOT NULL,
-                                  unit text PATH 'SIZE/@unit',
-                                  premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
-ERROR:  null is not allowed in column "size"
--- if all is ok, then result is empty
--- one line xml test
-WITH
-   x AS (SELECT proname, proowner, procost::numeric, pronargs,
-                array_to_string(proargnames,',') as proargnames,
-                case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes
-           FROM pg_proc WHERE proname = 'f_leak'),
-   y AS (SELECT xmlelement(name proc,
-                           xmlforest(proname, proowner,
-                                     procost, pronargs,
-                                     proargnames, proargtypes)) as proc
-           FROM x),
-   z AS (SELECT xmltable.*
-           FROM y,
-                LATERAL xmltable('/proc' PASSING proc
-                                 COLUMNS proname name,
-                                         proowner oid,
-                                         procost float,
-                                         pronargs int,
-                                         proargnames text,
-                                         proargtypes text))
-   SELECT * FROM z
-   EXCEPT SELECT * FROM x;
- proname | proowner | procost | pronargs | proargnames | proargtypes 
----------+----------+---------+----------+-------------+-------------
-(0 rows)
-
--- multi line xml test, result should be empty too
-WITH
-   x AS (SELECT proname, proowner, procost::numeric, pronargs,
-                array_to_string(proargnames,',') as proargnames,
-                case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes
-           FROM pg_proc),
-   y AS (SELECT xmlelement(name data,
-                           xmlagg(xmlelement(name proc,
-                                             xmlforest(proname, proowner, procost,
-                                                       pronargs, proargnames, proargtypes)))) as doc
-           FROM x),
-   z AS (SELECT xmltable.*
-           FROM y,
-                LATERAL xmltable('/data/proc' PASSING doc
-                                 COLUMNS proname name,
-                                         proowner oid,
-                                         procost float,
-                                         pronargs int,
-                                         proargnames text,
-                                         proargtypes text))
-   SELECT * FROM z
-   EXCEPT SELECT * FROM x;
- proname | proowner | procost | pronargs | proargnames | proargtypes 
----------+----------+---------+----------+-------------+-------------
-(0 rows)
-
-CREATE TABLE xmltest2(x xml, _path text);
-INSERT INTO xmltest2 VALUES('<d><r><ac>1</ac></r></d>', 'A');
-INSERT INTO xmltest2 VALUES('<d><r><bc>2</bc></r></d>', 'B');
-INSERT INTO xmltest2 VALUES('<d><r><cc>3</cc></r></d>', 'C');
-INSERT INTO xmltest2 VALUES('<d><r><dc>2</dc></r></d>', 'D');
-SELECT xmltable.* FROM xmltest2, LATERAL xmltable('/d/r' PASSING x COLUMNS a int PATH '' || lower(_path) || 'c');
- a 
----
- 1
- 2
- 3
- 2
-(4 rows)
-
-SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH '.');
- a 
----
- 1
- 2
- 3
- 2
-(4 rows)
-
-SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH 'x' DEFAULT ascii(_path) - 54);
- a  
-----
- 11
- 12
- 13
- 14
-(4 rows)
-
--- XPath result can be boolean or number too
-SELECT * FROM XMLTABLE('*' PASSING '<a>a</a>' COLUMNS a xml PATH '.', b text PATH '.', c text PATH '"hi"', d boolean PATH '. = "a"', e integer PATH 'string-length(.)');
-    a     | b | c  | d | e 
-----------+---+----+---+---
- <a>a</a> | a | hi | t | 1
-(1 row)
-
-\x
-SELECT * FROM XMLTABLE('*' PASSING '<e>pre<!--c1--><?pi arg?><![CDATA[&ent1]]><n2>&amp;deep</n2>post</e>' COLUMNS x xml PATH '/e/n2', y xml PATH '/');
--[ RECORD 1 ]-----------------------------------------------------------
-x | <n2>&amp;deep</n2>
-y | <e>pre<!--c1--><?pi arg?><![CDATA[&ent1]]><n2>&amp;deep</n2>post</e>+
-  | 
-
-\x
-SELECT * FROM XMLTABLE('.' PASSING XMLELEMENT(NAME a) columns a varchar(20) PATH '"<foo/>"', b xml PATH '"<foo/>"');
-   a    |      b       
---------+--------------
- <foo/> | &lt;foo/&gt;
-(1 row)
-
-SELECT xmltext(NULL);
- xmltext 
----------
- 
-(1 row)
-
-SELECT xmltext('');
- xmltext 
----------
- 
-(1 row)
-
-SELECT xmltext('  ');
- xmltext 
----------
-   
-(1 row)
-
-SELECT xmltext('foo `$_-+?=*^%!|/\()[]{}');
-         xmltext          
---------------------------
- foo `$_-+?=*^%!|/\()[]{}
-(1 row)
-
-SELECT xmltext('foo & <"bar">');
-              xmltext              
------------------------------------
- foo &amp; &lt;&quot;bar&quot;&gt;
-(1 row)
-
-SELECT xmltext('x'|| '<P>73</P>'::xml || .42 || true || 'j'::char);
-             xmltext             
----------------------------------
- x&lt;P&gt;73&lt;/P&gt;0.42truej
-(1 row)
-
diff --git a/src/test/regress/sql/xml.sql b/src/test/regress/sql/xml.sql
index 2b8445e499ec..97d7b65350cd 100644
--- a/src/test/regress/sql/xml.sql
+++ b/src/test/regress/sql/xml.sql
@@ -5,7 +5,14 @@ CREATE TABLE xmltest (
 
 INSERT INTO xmltest VALUES (1, '<value>one</value>');
 INSERT INTO xmltest VALUES (2, '<value>two</value>');
-INSERT INTO xmltest VALUES (3, '<wrong');
+INSERT INTO xmltest VALUES (3, '<value>two</wrong>  ');
+
+-- If no XML data could be inserted, skip the tests as the server has been
+-- compiled without libxml support.
+SELECT count(*) = 0 AS skip_test FROM xmltest \gset
+\if :skip_test
+\quit
+\endif
 
 SELECT * FROM xmltest;
 
@@ -30,7 +37,7 @@ SELECT xmlconcat(xmlcomment('hello'),
 
 SELECT xmlconcat('hello', 'you');
 SELECT xmlconcat(1, 2);
-SELECT xmlconcat('bad', '<syntax');
+SELECT xmlconcat('bad', '<wrong></syntax>  ');
 SELECT xmlconcat('<foo/>', NULL, '<?xml version="1.1" standalone="no"?><bar/>');
 SELECT xmlconcat('<?xml version="1.1"?><foo/>', NULL, '<?xml version="1.1" standalone="no"?><bar/>');
 SELECT xmlconcat(NULL);
@@ -75,17 +82,17 @@ SELECT xmlparse(content '<invalidentity>&</invalidentity>');
 SELECT xmlparse(content '<undefinedentity>&idontexist;</undefinedentity>');
 SELECT xmlparse(content '<invalidns xmlns=''&lt;''/>');
 SELECT xmlparse(content '<relativens xmlns=''relative''/>');
-SELECT xmlparse(content '<twoerrors>&idontexist;</unbalanced>');
+SELECT xmlparse(content '<twoerrors>&idontexist;</unbalanced>  ');
 SELECT xmlparse(content '<nosuchprefix:tag/>');
 
-SELECT xmlparse(document '   ');
+SELECT xmlparse(document '!');
 SELECT xmlparse(document 'abc');
 SELECT xmlparse(document '<abc>x</abc>');
-SELECT xmlparse(document '<invalidentity>&</abc>');
-SELECT xmlparse(document '<undefinedentity>&idontexist;</abc>');
+SELECT xmlparse(document '<invalidentity>&</abc>  ');
+SELECT xmlparse(document '<undefinedentity>&idontexist;</abc>  ');
 SELECT xmlparse(document '<invalidns xmlns=''&lt;''/>');
 SELECT xmlparse(document '<relativens xmlns=''relative''/>');
-SELECT xmlparse(document '<twoerrors>&idontexist;</unbalanced>');
+SELECT xmlparse(document '<twoerrors>&idontexist;</unbalanced>  ');
 SELECT xmlparse(document '<nosuchprefix:tag/>');
 
 
-- 
2.54.0