v11-0006-Tests-for-parallel-copy.patch

From d4be261350ac38278cb90973d395f3fc96aec396 Mon Sep 17 00:00:00 2001
From: Vignesh C <vignesh21@gmail.com>
Date: Wed, 18 Nov 2020 07:58:58 +0530
Subject: [PATCH v11 6/6] Tests for parallel copy.

This patch has the tests for parallel copy.
---
 contrib/postgres_fdw/expected/postgres_fdw.out |  48 ++++
 contrib/postgres_fdw/sql/postgres_fdw.sql      |  52 ++++
 src/test/regress/expected/copy2.out            | 324 +++++++++++++++++++++-
 src/test/regress/input/copy.source             |  31 +++
 src/test/regress/output/copy.source            |  27 ++
 src/test/regress/sql/copy2.sql                 | 369 ++++++++++++++++++++++++-
 6 files changed, 843 insertions(+), 8 deletions(-)

diff --git a/contrib/postgres_fdw/expected/postgres_fdw.out b/contrib/postgres_fdw/expected/postgres_fdw.out
index 2d88d06..1e78b6a 100644
--- a/contrib/postgres_fdw/expected/postgres_fdw.out
+++ b/contrib/postgres_fdw/expected/postgres_fdw.out
@@ -9033,5 +9033,53 @@ SELECT 1 FROM ft1 LIMIT 1;    -- should fail
 ERROR:  08006
 \set VERBOSITY default
 COMMIT;
+-- parallel copy related tests.
+CREATE TABLE test_parallel_copy (
+        a INT,
+        b INT,
+        c TEXT default 'stuff',
+        d TEXT,
+        e TEXT
+) ;
+CREATE FOREIGN TABLE test_parallel_copy_ft (
+        a INT,
+        b INT,
+        c TEXT default 'stuff',
+        d TEXT,
+        e TEXT
+) SERVER loopback OPTIONS (table_name 'test_parallel_copy') ;
+-- parallel copy into foreign table, parallelism must not be picked up.
+COPY test_parallel_copy_ft FROM stdin WITH (PARALLEL 1);
+SELECT count(*) FROM test_parallel_copy_ft;
+ count 
+-------
+     2
+(1 row)
+
+-- parallel copy into a table with foreign partition.
+CREATE TABLE part_test_parallel_copy (
+        a INT,
+        b INT,
+        c TEXT default 'stuff',
+        d TEXT,
+        e TEXT
+) PARTITION BY LIST (b);
+CREATE FOREIGN TABLE part_test_parallel_copy_a1 (c TEXT, b INT, a INT, e TEXT, d TEXT) SERVER loopback;
+CREATE TABLE part_test_parallel_copy_a2 (a INT, c TEXT, b INT, d TEXT, e TEXT);
+ALTER TABLE part_test_parallel_copy ATTACH PARTITION part_test_parallel_copy_a1 FOR VALUES IN(1);
+ALTER TABLE part_test_parallel_copy ATTACH PARTITION part_test_parallel_copy_a2 FOR VALUES IN(2);
+-- Verify that sequential copy is choosen by checking error in not from a parallel worker.
+COPY part_test_parallel_copy FROM stdin WITH (PARALLEL 1);
+ERROR:  extra data after last expected column
+CONTEXT:  COPY part_test_parallel_copy, line 1: "1	1	test_c1	test_d1	test_e1	test_nonexistent1"
+SELECT count(*) FROM part_test_parallel_copy WHERE b = 2;
+ count 
+-------
+     0
+(1 row)
+
 -- Clean up
 DROP PROCEDURE terminate_backend_and_wait(text);
+DROP FOREIGN TABLE test_parallel_copy_ft;
+DROP TABLE test_parallel_copy;
+DROP TABLE part_test_parallel_copy;
diff --git a/contrib/postgres_fdw/sql/postgres_fdw.sql b/contrib/postgres_fdw/sql/postgres_fdw.sql
index 7581c54..f804e4c 100644
--- a/contrib/postgres_fdw/sql/postgres_fdw.sql
+++ b/contrib/postgres_fdw/sql/postgres_fdw.sql
@@ -2695,5 +2695,57 @@ SELECT 1 FROM ft1 LIMIT 1;    -- should fail
 \set VERBOSITY default
 COMMIT;
 
+-- parallel copy related tests.
+CREATE TABLE test_parallel_copy (
+        a INT,
+        b INT,
+        c TEXT default 'stuff',
+        d TEXT,
+        e TEXT
+) ;
+
+CREATE FOREIGN TABLE test_parallel_copy_ft (
+        a INT,
+        b INT,
+        c TEXT default 'stuff',
+        d TEXT,
+        e TEXT
+) SERVER loopback OPTIONS (table_name 'test_parallel_copy') ;
+
+-- parallel copy into foreign table, parallelism must not be picked up.
+COPY test_parallel_copy_ft FROM stdin WITH (PARALLEL 1);
+1	1	test_c1	test_d1	test_e1
+2	2	test_c2	test_d2	test_e2
+\.
+
+SELECT count(*) FROM test_parallel_copy_ft;
+
+-- parallel copy into a table with foreign partition.
+CREATE TABLE part_test_parallel_copy (
+        a INT,
+        b INT,
+        c TEXT default 'stuff',
+        d TEXT,
+        e TEXT
+) PARTITION BY LIST (b);
+
+CREATE FOREIGN TABLE part_test_parallel_copy_a1 (c TEXT, b INT, a INT, e TEXT, d TEXT) SERVER loopback;
+
+CREATE TABLE part_test_parallel_copy_a2 (a INT, c TEXT, b INT, d TEXT, e TEXT);
+
+ALTER TABLE part_test_parallel_copy ATTACH PARTITION part_test_parallel_copy_a1 FOR VALUES IN(1);
+
+ALTER TABLE part_test_parallel_copy ATTACH PARTITION part_test_parallel_copy_a2 FOR VALUES IN(2);
+
+-- Verify that sequential copy is choosen by checking error in not from a parallel worker.
+COPY part_test_parallel_copy FROM stdin WITH (PARALLEL 1);
+1	1	test_c1	test_d1	test_e1	test_nonexistent1
+\.
+
+SELECT count(*) FROM part_test_parallel_copy WHERE b = 2;
+
 -- Clean up
 DROP PROCEDURE terminate_backend_and_wait(text);
+DROP FOREIGN TABLE test_parallel_copy_ft;
+DROP TABLE test_parallel_copy;
+DROP TABLE part_test_parallel_copy;
diff --git a/src/test/regress/expected/copy2.out b/src/test/regress/expected/copy2.out
index c64f071..22274cb 100644
--- a/src/test/regress/expected/copy2.out
+++ b/src/test/regress/expected/copy2.out
@@ -301,18 +301,32 @@ It is "perfect".|
 "It is ""perfect"".","	"
 "",
 --test that we read consecutive LFs properly
-CREATE TEMP TABLE testnl (a int, b text, c int);
+CREATE TABLE testnl (a int, b text, c int);
 COPY testnl FROM stdin CSV;
+COPY testnl FROM stdin WITH (FORMAT 'csv', PARALLEL 1);
+SELECT * FROM testnl;
+ a |          b           | c 
+---+----------------------+---
+ 1 | a field with two LFs+| 2
+   |                     +| 
+   | inside               | 
+ 1 | a field with two LFs+| 2
+   |                     +| 
+   | inside               | 
+(2 rows)
+
 -- test end of copy marker
-CREATE TEMP TABLE testeoc (a text);
+CREATE TABLE testeoc (a text);
 COPY testeoc FROM stdin CSV;
+TRUNCATE testeoc;
+COPY testeoc FROM stdin WITH (FORMAT 'csv', PARALLEL 1);
 COPY testeoc TO stdout CSV;
 a\.
 \.b
 c\.d
 "\."
 -- test handling of nonstandard null marker that violates escaping rules
-CREATE TEMP TABLE testnull(a int, b text);
+CREATE TABLE testnull(a int, b text);
 INSERT INTO testnull VALUES (1, E'\\0'), (NULL, NULL);
 COPY testnull TO stdout WITH NULL AS E'\\0';
 1	\\0
@@ -327,6 +341,15 @@ SELECT * FROM testnull;
     | 
 (4 rows)
 
+TRUNCATE testnull;
+COPY testnull FROM stdin WITH (NULL E'\\0', PARALLEL 1);
+SELECT * FROM testnull;
+ a  | b  
+----+----
+ 42 | \0
+    | 
+(2 rows)
+
 BEGIN;
 CREATE TABLE vistest (LIKE testeoc);
 COPY vistest FROM stdin CSV;
@@ -396,6 +419,34 @@ SELECT * FROM vistest;
 
 BEGIN;
 TRUNCATE vistest;
+COPY vistest FROM stdin WITH (FORMAT 'csv', FREEZE, PARALLEL 1);
+SELECT * FROM vistest;
+ a  
+----
+ a2
+ b
+(2 rows)
+
+SAVEPOINT s1;
+TRUNCATE vistest;
+COPY vistest FROM stdin WITH (FORMAT 'csv', FREEZE, PARALLEL 1);
+SELECT * FROM vistest;
+ a  
+----
+ d2
+ e
+(2 rows)
+
+COMMIT;
+SELECT * FROM vistest;
+ a  
+----
+ d2
+ e
+(2 rows)
+
+BEGIN;
+TRUNCATE vistest;
 COPY vistest FROM stdin CSV FREEZE;
 SELECT * FROM vistest;
  a 
@@ -456,7 +507,7 @@ SELECT * FROM vistest;
 (2 rows)
 
 -- Test FORCE_NOT_NULL and FORCE_NULL options
-CREATE TEMP TABLE forcetest (
+CREATE TABLE forcetest (
     a INT NOT NULL,
     b TEXT NOT NULL,
     c TEXT,
@@ -467,6 +518,8 @@ CREATE TEMP TABLE forcetest (
 -- should succeed with no effect ("b" remains an empty string, "c" remains NULL)
 BEGIN;
 COPY forcetest (a, b, c) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(b), FORCE_NULL(c));
+TRUNCATE forcetest;
+COPY forcetest (a, b, c) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(b), FORCE_NULL(c), PARALLEL 1);
 COMMIT;
 SELECT b, c FROM forcetest WHERE a = 1;
  b |  c   
@@ -477,6 +530,8 @@ SELECT b, c FROM forcetest WHERE a = 1;
 -- should succeed, FORCE_NULL and FORCE_NOT_NULL can be both specified
 BEGIN;
 COPY forcetest (a, b, c, d) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(c,d), FORCE_NULL(c,d));
+TRUNCATE forcetest;
+COPY forcetest (a, b, c, d) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(c,d), FORCE_NULL(c,d), PARALLEL 1);
 COMMIT;
 SELECT c, d FROM forcetest WHERE a = 2;
  c |  d   
@@ -533,6 +588,30 @@ select * from check_con_tbl;
    
 (2 rows)
 
+\d+ check_con_tbl
+                               Table "public.check_con_tbl"
+ Column |  Type   | Collation | Nullable | Default | Storage | Stats target | Description 
+--------+---------+-----------+----------+---------+---------+--------------+-------------
+ f1     | integer |           |          |         | plain   |              | 
+Check constraints:
+    "check_con_tbl_check" CHECK (check_con_function(check_con_tbl.*))
+
+truncate check_con_tbl;
+copy check_con_tbl from stdin with (parallel 1);
+NOTICE:  input = {"f1":1}
+NOTICE:  input = {"f1":null}
+copy check_con_tbl from stdin with (parallel 1);
+NOTICE:  input = {"f1":0}
+ERROR:  new row for relation "check_con_tbl" violates check constraint "check_con_tbl_check"
+DETAIL:  Failing row contains (0).
+CONTEXT:  COPY check_con_tbl, line 1: "0"
+select * from check_con_tbl;
+ f1 
+----
+  1
+   
+(2 rows)
+
 -- test with RLS enabled.
 CREATE ROLE regress_rls_copy_user;
 CREATE ROLE regress_rls_copy_user_colperms;
@@ -647,10 +726,247 @@ SELECT * FROM instead_of_insert_tbl;
 (2 rows)
 
 COMMIT;
+-- Parallel copy tests.
+CREATE TABLE test_parallel_copy (
+        a INT,
+        b INT,
+        c TEXT not null default 'stuff',
+        d TEXT,
+        e TEXT
+) ;
+COPY test_parallel_copy (a, b, c, d, e) FROM stdin WITH (PARALLEL 1);
+COPY test_parallel_copy (b, d) FROM stdin WITH (PARALLEL 1);
+COPY test_parallel_copy (b, d) FROM stdin WITH (PARALLEL 1);
+COPY test_parallel_copy (b, d) FROM stdin WITH (PARALLEL 1, FORMAT 'csv', HEADER);
+-- zero workers: should perform non-parallel copy
+COPY test_parallel_copy (b, d) FROM stdin WITH (PARALLEL 0);
+ERROR:  value 0 out of bounds for option "parallel"
+DETAIL:  Valid values are between "1" and "1024".
+-- referencing table: should perform non-parallel copy
+CREATE TABLE test_copy_pk(c1 INT PRIMARY KEY);
+INSERT INTO test_copy_pk VALUES(10);
+CREATE TABLE test_copy_ri(c1 INT REFERENCES test_copy_pk(c1));
+COPY test_copy_ri FROM stdin WITH (FORMAT csv, DELIMITER ',', PARALLEL 1);
+-- expressions: should perform non-parallel copy
+CREATE TABLE test_copy_expr (index INT, height REAL, weight REAL);
+COPY test_copy_expr FROM STDIN WITH (FORMAT csv, DELIMITER ',', PARALLEL 1) WHERE height > random() * 65;
+-- serial data: should perform non-parallel copy
+CREATE TABLE testserial (index SERIAL, height REAL);
+COPY testserial(height) FROM STDIN WITH (FORMAT csv, DELIMITER ',', PARALLEL 1);
+-- temporary table copy: should perform non-parallel copy
+CREATE TEMPORARY TABLE temp_test(
+        a int
+) ;
+COPY temp_test (a) FROM stdin WITH (PARALLEL 1);
+-- non-existent column in column list: should fail
+COPY test_parallel_copy (xyz) FROM stdin WITH (PARALLEL 1);
+ERROR:  column "xyz" of relation "test_parallel_copy" does not exist
+-- too many columns in column list: should fail
+COPY test_parallel_copy (a, b, c, d, e, d, c) FROM stdin WITH (PARALLEL 1);
+ERROR:  column "d" specified more than once
+-- missing data: should fail
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+ERROR:  invalid input syntax for type integer: ""
+CONTEXT:  COPY test_parallel_copy, line 0, column a: ""
+parallel worker
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+ERROR:  missing data for column "e"
+CONTEXT:  COPY test_parallel_copy, line 1: "2000	230	23	23"
+parallel worker
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+ERROR:  missing data for column "e"
+CONTEXT:  COPY test_parallel_copy, line 1: "2001	231	\N	\N"
+parallel worker
+-- extra data: should fail
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+ERROR:  extra data after last expected column
+CONTEXT:  COPY test_parallel_copy, line 1: "2002	232	40	50	60	70	80"
+parallel worker
+-- various COPY options: delimiters, oids, NULL string, encoding
+COPY test_parallel_copy (b, c, d, e) FROM stdin WITH (DELIMITER ',', null 'x', PARALLEL 1) ;
+COPY test_parallel_copy FROM stdin WITH (DELIMITER ';', NULL '', PARALLEL 1);
+COPY test_parallel_copy FROM stdin WITH (DELIMITER ':', NULL E'\\X', ENCODING 'sql_ascii', PARALLEL 1);
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1) WHERE a = 50004;
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1) WHERE a > 60003;
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1) WHERE f > 60003;
+ERROR:  column "f" does not exist
+LINE 1: ..._parallel_copy FROM stdin WITH (PARALLEL 1) WHERE f > 60003;
+                                                             ^
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1) WHERE a = max(x.b);
+ERROR:  missing FROM-clause entry for table "x"
+LINE 1: ...rallel_copy FROM stdin WITH (PARALLEL 1) WHERE a = max(x.b);
+                                                                  ^
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1) WHERE a IN (SELECT 1 FROM x);
+ERROR:  cannot use subquery in COPY FROM WHERE condition
+LINE 1: ...arallel_copy FROM stdin WITH (PARALLEL 1) WHERE a IN (SELECT...
+                                                             ^
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1) WHERE a IN (generate_series(1,5));
+ERROR:  set-returning functions are not allowed in COPY FROM WHERE conditions
+LINE 1: ...lel_copy FROM stdin WITH (PARALLEL 1) WHERE a IN (generate_s...
+                                                             ^
+COPY test_parallel_copy FROM stdin WITH(PARALLEL 1) WHERE a = row_number() over(b);
+ERROR:  window functions are not allowed in COPY FROM WHERE conditions
+LINE 1: ...rallel_copy FROM stdin WITH(PARALLEL 1) WHERE a = row_number...
+                                                             ^
+-- check results of copy in
+SELECT * FROM test_parallel_copy ORDER BY 1;
+   a   | b  |     c      |    d    |    e    
+-------+----+------------+---------+---------
+     1 | 11 | test_c1    | test_d1 | test_e1
+     2 | 12 | test_c2    | test_d2 | test_e2
+  3000 |    | c          |         | 
+  4000 |    | C          |         | 
+  4001 |  1 | empty      |         | 
+  4002 |  2 | null       |         | 
+  4003 |  3 | Backslash  | \       | \
+  4004 |  4 | BackslashX | \X      | \X
+  4005 |  5 | N          | N       | N
+  4006 |  6 | BackslashN | \N      | \N
+  4007 |  7 | XX         | XX      | XX
+  4008 |  8 | Delimiter  | :       | :
+ 50004 | 25 | 35         | 45      | 55
+ 60004 | 25 | 35         | 45      | 55
+ 60005 | 26 | 36         | 46      | 56
+       |  3 | stuff      | test_d3 | 
+       |  4 | stuff      | test_d4 | 
+       |  5 | stuff      | test_d5 | 
+       |    | ,          | \,      | \
+       |    | x          | \x      | \x
+       |    | 45         | 80      | 90
+(21 rows)
+
+-- parallel copy test for unlogged tables. should execute in parallel worker
+CREATE UNLOGGED TABLE test_parallel_copy_unlogged(
+        a INT,
+        b INT,
+        c TEXT default 'stuff',
+        d TEXT,
+        e TEXT
+);
+COPY test_parallel_copy_unlogged FROM stdin WITH (PARALLEL 1);
+SELECT count(*) FROM test_parallel_copy_unlogged;
+ count 
+-------
+     2
+(1 row)
+
+-- parallel copy test for various trigger types
+TRUNCATE test_parallel_copy;
+-- parallel safe trigger function
+CREATE OR REPLACE FUNCTION parallel_copy_trig_func() RETURNS TRIGGER
+LANGUAGE plpgsql PARALLEL SAFE AS $$
+BEGIN
+  RETURN NEW;
+END;
+$$;
+-- before insert row trigger
+CREATE TRIGGER parallel_copy_trig
+BEFORE INSERT ON test_parallel_copy
+FOR EACH ROW
+EXECUTE PROCEDURE parallel_copy_trig_func();
+-- no parallelism should be picked
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy;
+-- after insert row trigger
+CREATE TRIGGER parallel_copy_trig
+AFTER INSERT ON test_parallel_copy
+FOR EACH ROW
+EXECUTE PROCEDURE parallel_copy_trig_func();
+-- no parallelism should be picked
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy;
+-- before insert statement trigger
+CREATE TRIGGER parallel_copy_trig
+BEFORE INSERT ON test_parallel_copy
+FOR EACH STATEMENT
+EXECUTE PROCEDURE parallel_copy_trig_func();
+-- parallelism should be picked, since the trigger function is parallel safe
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy;
+-- after insert statement trigger
+CREATE TRIGGER parallel_copy_trig
+AFTER INSERT ON test_parallel_copy
+FOR EACH STATEMENT
+EXECUTE PROCEDURE parallel_copy_trig_func();
+-- no parallelism should be picked
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy;
+-- transition table is involved
+CREATE TRIGGER parallel_copy_trig
+AFTER INSERT ON test_parallel_copy REFERENCING NEW TABLE AS new_table
+FOR EACH STATEMENT
+EXECUTE PROCEDURE parallel_copy_trig_func();
+-- no parallelism should be picked
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy;
+-- make trigger function parallel unsafe
+ALTER FUNCTION parallel_copy_trig_func PARALLEL UNSAFE;
+-- before statement trigger has a parallel unsafe function
+CREATE TRIGGER parallel_copy_trig
+BEFORE INSERT ON test_parallel_copy
+FOR EACH STATEMENT
+EXECUTE PROCEDURE parallel_copy_trig_func();
+-- no parallelism should be picked
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+SELECT count(*) FROM test_parallel_copy;
+ count 
+-------
+    12
+(1 row)
+
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy;
+-- instead of insert trigger, no parallelism should be picked
+COPY instead_of_insert_tbl_view FROM stdin WITH(PARALLEL 1);;
+SELECT count(*) FROM instead_of_insert_tbl_view;
+ count 
+-------
+     1
+(1 row)
+
+-- parallel copy test for a partitioned table with a before insert trigger on
+-- one of the partition
+ALTER FUNCTION parallel_copy_trig_func PARALLEL SAFE;
+CREATE TABLE test_parallel_copy_part (
+        a INT,
+        b INT,
+        c TEXT default 'stuff',
+        d TEXT,
+        e TEXT
+) PARTITION BY LIST (b);
+CREATE TABLE test_parallel_copy_part_a1 (c TEXT, b INT, a INT, e TEXT, d TEXT);
+CREATE TABLE test_parallel_copy_part_a2 (a INT, c TEXT, b INT, d TEXT, e TEXT);
+ALTER TABLE test_parallel_copy_part ATTACH PARTITION test_parallel_copy_part_a1 FOR VALUES IN(1);
+ALTER TABLE test_parallel_copy_part ATTACH PARTITION test_parallel_copy_part_a2 FOR VALUES IN(2);
+CREATE TRIGGER parallel_copy_trig
+BEFORE INSERT ON test_parallel_copy_part_a2
+FOR EACH ROW
+EXECUTE PROCEDURE parallel_copy_trig_func();
+-- Verify that sequential copy is choosen by checking error in not from a parallel worker.
+COPY test_parallel_copy_part FROM stdin WITH (PARALLEL 1);
+ERROR:  extra data after last expected column
+CONTEXT:  COPY test_parallel_copy_part, line 2: "2	2	test_c2	test_d2	test_e2	test_ne2"
+SELECT count(*) FROM test_parallel_copy_part;
+ count 
+-------
+     0
+(1 row)
+
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy_part_a2;
 -- clean up
+DROP TABLE test_copy_ri;
+DROP TABLE test_copy_pk;
+DROP TABLE test_copy_expr;
+DROP TABLE testeoc;
+DROP TABLE testnl;
 DROP TABLE forcetest;
+DROP TABLE test_parallel_copy;
+DROP TABLE test_parallel_copy_unlogged;
+DROP TABLE test_parallel_copy_part;
+DROP TABLE testserial;
+DROP TABLE testnull;
 DROP TABLE vistest;
 DROP FUNCTION truncate_in_subxact();
+DROP FUNCTION parallel_copy_trig_func();
 DROP TABLE x, y;
 DROP TABLE rls_t1 CASCADE;
 DROP ROLE regress_rls_copy_user;
diff --git a/src/test/regress/input/copy.source b/src/test/regress/input/copy.source
index a1d529a..cb39c66 100644
--- a/src/test/regress/input/copy.source
+++ b/src/test/regress/input/copy.source
@@ -15,6 +15,13 @@ DELETE FROM onek;
 
 COPY onek FROM '@abs_builddir@/results/onek.data';
 
+-- test parallel copy
+COPY tenk1 FROM '@abs_srcdir@/data/tenk.data' WITH (parallel 2);
+
+SELECT COUNT(*) FROM tenk1;
+
+TRUNCATE tenk1;
+
 COPY tenk1 FROM '@abs_srcdir@/data/tenk.data';
 
 COPY slow_emp4000 FROM '@abs_srcdir@/data/rect.data';
@@ -159,6 +166,30 @@ truncate parted_copytest;
 
 copy parted_copytest from '@abs_builddir@/results/parted_copytest.csv';
 
+-- Test parallel copy from with a partitioned table.
+truncate parted_copytest;
+
+copy parted_copytest from '@abs_builddir@/results/parted_copytest.csv' with (parallel 2);
+
+-- Test parallel copy from for toast table with csv and binary format file
+create table test_parallel_copy_toast(a1 int, b1 text, c1 text default null);
+
+insert into test_parallel_copy_toast select i, (repeat(md5(i::text), 100000)) FROM generate_series(1,2) AS i;
+
+copy test_parallel_copy_toast to '@abs_builddir@/results/parallelcopytoast.csv' with(format csv);
+
+copy test_parallel_copy_toast to '@abs_builddir@/results/parallelcopytoast.dat' with(format binary);
+
+truncate test_parallel_copy_toast;
+
+copy test_parallel_copy_toast from '@abs_builddir@/results/parallelcopytoast.csv' with(format csv, parallel 2);
+
+copy test_parallel_copy_toast from '@abs_builddir@/results/parallelcopytoast.dat' with(format binary, parallel 2);
+
+select count(*) from test_parallel_copy_toast;
+
+drop table test_parallel_copy_toast;
+
 -- Ensure COPY FREEZE errors for partitioned tables.
 begin;
 truncate parted_copytest;
diff --git a/src/test/regress/output/copy.source b/src/test/regress/output/copy.source
index 938d355..a5dca79 100644
--- a/src/test/regress/output/copy.source
+++ b/src/test/regress/output/copy.source
@@ -9,6 +9,15 @@ COPY onek FROM '@abs_srcdir@/data/onek.data';
 COPY onek TO '@abs_builddir@/results/onek.data';
 DELETE FROM onek;
 COPY onek FROM '@abs_builddir@/results/onek.data';
+-- test parallel copy
+COPY tenk1 FROM '@abs_srcdir@/data/tenk.data' WITH (parallel 2);
+SELECT COUNT(*) FROM tenk1;
+ count 
+-------
+ 10000
+(1 row)
+
+TRUNCATE tenk1;
 COPY tenk1 FROM '@abs_srcdir@/data/tenk.data';
 COPY slow_emp4000 FROM '@abs_srcdir@/data/rect.data';
 COPY person FROM '@abs_srcdir@/data/person.data';
@@ -113,6 +122,24 @@ insert into parted_copytest select x,1,'One' from generate_series(1011,1020) x;
 copy (select * from parted_copytest order by a) to '@abs_builddir@/results/parted_copytest.csv';
 truncate parted_copytest;
 copy parted_copytest from '@abs_builddir@/results/parted_copytest.csv';
+-- Test parallel copy from with a partitioned table.
+truncate parted_copytest;
+copy parted_copytest from '@abs_builddir@/results/parted_copytest.csv' with (parallel 2);
+-- Test parallel copy from for toast table with csv and binary format file
+create table test_parallel_copy_toast(a1 int, b1 text, c1 text default null);
+insert into test_parallel_copy_toast select i, (repeat(md5(i::text), 100000)) FROM generate_series(1,2) AS i;
+copy test_parallel_copy_toast to '@abs_builddir@/results/parallelcopytoast.csv' with(format csv);
+copy test_parallel_copy_toast to '@abs_builddir@/results/parallelcopytoast.dat' with(format binary);
+truncate test_parallel_copy_toast;
+copy test_parallel_copy_toast from '@abs_builddir@/results/parallelcopytoast.csv' with(format csv, parallel 2);
+copy test_parallel_copy_toast from '@abs_builddir@/results/parallelcopytoast.dat' with(format binary, parallel 2);
+select count(*) from test_parallel_copy_toast;
+ count 
+-------
+     4
+(1 row)
+
+drop table test_parallel_copy_toast;
 -- Ensure COPY FREEZE errors for partitioned tables.
 begin;
 truncate parted_copytest;
diff --git a/src/test/regress/sql/copy2.sql b/src/test/regress/sql/copy2.sql
index b3c16af..ebca6e6 100644
--- a/src/test/regress/sql/copy2.sql
+++ b/src/test/regress/sql/copy2.sql
@@ -171,7 +171,7 @@ COPY y TO stdout (FORMAT CSV, FORCE_QUOTE *);
 
 --test that we read consecutive LFs properly
 
-CREATE TEMP TABLE testnl (a int, b text, c int);
+CREATE TABLE testnl (a int, b text, c int);
 
 COPY testnl FROM stdin CSV;
 1,"a field with two LFs
@@ -179,8 +179,16 @@ COPY testnl FROM stdin CSV;
 inside",2
 \.
 
+COPY testnl FROM stdin WITH (FORMAT 'csv', PARALLEL 1);
+1,"a field with two LFs
+
+inside",2
+\.
+
+SELECT * FROM testnl;
+
 -- test end of copy marker
-CREATE TEMP TABLE testeoc (a text);
+CREATE TABLE testeoc (a text);
 
 COPY testeoc FROM stdin CSV;
 a\.
@@ -189,11 +197,19 @@ c\.d
 "\."
 \.
 
+TRUNCATE testeoc;
+COPY testeoc FROM stdin WITH (FORMAT 'csv', PARALLEL 1);
+a\.
+\.b
+c\.d
+"\."
+\.
+
 COPY testeoc TO stdout CSV;
 
 -- test handling of nonstandard null marker that violates escaping rules
 
-CREATE TEMP TABLE testnull(a int, b text);
+CREATE TABLE testnull(a int, b text);
 INSERT INTO testnull VALUES (1, E'\\0'), (NULL, NULL);
 
 COPY testnull TO stdout WITH NULL AS E'\\0';
@@ -205,6 +221,14 @@ COPY testnull FROM stdin WITH NULL AS E'\\0';
 
 SELECT * FROM testnull;
 
+TRUNCATE testnull;
+COPY testnull FROM stdin WITH (NULL E'\\0', PARALLEL 1);
+42	\\0
+\0	\0
+\.
+
+SELECT * FROM testnull;
+
 BEGIN;
 CREATE TABLE vistest (LIKE testeoc);
 COPY vistest FROM stdin CSV;
@@ -249,6 +273,23 @@ SELECT * FROM vistest;
 
 BEGIN;
 TRUNCATE vistest;
+COPY vistest FROM stdin WITH (FORMAT 'csv', FREEZE, PARALLEL 1);
+a2
+b
+\.
+SELECT * FROM vistest;
+SAVEPOINT s1;
+TRUNCATE vistest;
+COPY vistest FROM stdin WITH (FORMAT 'csv', FREEZE, PARALLEL 1);
+d2
+e
+\.
+SELECT * FROM vistest;
+COMMIT;
+SELECT * FROM vistest;
+
+BEGIN;
+TRUNCATE vistest;
 COPY vistest FROM stdin CSV FREEZE;
 x
 y
@@ -298,7 +339,7 @@ SELECT * FROM vistest;
 COMMIT;
 SELECT * FROM vistest;
 -- Test FORCE_NOT_NULL and FORCE_NULL options
-CREATE TEMP TABLE forcetest (
+CREATE TABLE forcetest (
     a INT NOT NULL,
     b TEXT NOT NULL,
     c TEXT,
@@ -311,6 +352,10 @@ BEGIN;
 COPY forcetest (a, b, c) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(b), FORCE_NULL(c));
 1,,""
 \.
+TRUNCATE forcetest;
+COPY forcetest (a, b, c) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(b), FORCE_NULL(c), PARALLEL 1);
+1,,""
+\.
 COMMIT;
 SELECT b, c FROM forcetest WHERE a = 1;
 -- should succeed, FORCE_NULL and FORCE_NOT_NULL can be both specified
@@ -318,6 +363,10 @@ BEGIN;
 COPY forcetest (a, b, c, d) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(c,d), FORCE_NULL(c,d));
 2,'a',,""
 \.
+TRUNCATE forcetest;
+COPY forcetest (a, b, c, d) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(c,d), FORCE_NULL(c,d), PARALLEL 1);
+2,'a',,""
+\.
 COMMIT;
 SELECT c, d FROM forcetest WHERE a = 2;
 -- should fail with not-null constraint violation
@@ -353,6 +402,16 @@ copy check_con_tbl from stdin;
 0
 \.
 select * from check_con_tbl;
+\d+ check_con_tbl
+truncate check_con_tbl;
+copy check_con_tbl from stdin with (parallel 1);
+1
+\N
+\.
+copy check_con_tbl from stdin with (parallel 1);
+0
+\.
+select * from check_con_tbl;
 
 -- test with RLS enabled.
 CREATE ROLE regress_rls_copy_user;
@@ -454,10 +513,312 @@ test1
 SELECT * FROM instead_of_insert_tbl;
 COMMIT;
 
+-- Parallel copy tests.
+CREATE TABLE test_parallel_copy (
+        a INT,
+        b INT,
+        c TEXT not null default 'stuff',
+        d TEXT,
+        e TEXT
+) ;
+
+COPY test_parallel_copy (a, b, c, d, e) FROM stdin WITH (PARALLEL 1);
+1	11	test_c1	test_d1	test_e1
+2	12	test_c2	test_d2	test_e2
+\.
+
+COPY test_parallel_copy (b, d) FROM stdin WITH (PARALLEL 1);
+3	test_d3
+\.
+
+COPY test_parallel_copy (b, d) FROM stdin WITH (PARALLEL 1);
+4	test_d4
+5	test_d5
+\.
+
+COPY test_parallel_copy (b, d) FROM stdin WITH (PARALLEL 1, FORMAT 'csv', HEADER);
+b	d
+\.
+
+-- zero workers: should perform non-parallel copy
+COPY test_parallel_copy (b, d) FROM stdin WITH (PARALLEL 0);
+
+-- referencing table: should perform non-parallel copy
+CREATE TABLE test_copy_pk(c1 INT PRIMARY KEY);
+INSERT INTO test_copy_pk VALUES(10);
+CREATE TABLE test_copy_ri(c1 INT REFERENCES test_copy_pk(c1));
+COPY test_copy_ri FROM stdin WITH (FORMAT csv, DELIMITER ',', PARALLEL 1);
+10
+\.
+
+-- expressions: should perform non-parallel copy
+CREATE TABLE test_copy_expr (index INT, height REAL, weight REAL);
+
+COPY test_copy_expr FROM STDIN WITH (FORMAT csv, DELIMITER ',', PARALLEL 1) WHERE height > random() * 65;
+60,60,60
+\.
+
+-- serial data: should perform non-parallel copy
+CREATE TABLE testserial (index SERIAL, height REAL);
+
+COPY testserial(height) FROM STDIN WITH (FORMAT csv, DELIMITER ',', PARALLEL 1);
+60
+\.
+
+-- temporary table copy: should perform non-parallel copy
+CREATE TEMPORARY TABLE temp_test(
+        a int
+) ;
+
+COPY temp_test (a) FROM stdin WITH (PARALLEL 1);
+10
+\.
+
+-- non-existent column in column list: should fail
+COPY test_parallel_copy (xyz) FROM stdin WITH (PARALLEL 1);
+
+-- too many columns in column list: should fail
+COPY test_parallel_copy (a, b, c, d, e, d, c) FROM stdin WITH (PARALLEL 1);
+
+-- missing data: should fail
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+
+\.
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+2000	230	23	23
+\.
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+2001	231	\N	\N
+\.
+
+-- extra data: should fail
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+2002	232	40	50	60	70	80
+\.
+
+-- various COPY options: delimiters, oids, NULL string, encoding
+COPY test_parallel_copy (b, c, d, e) FROM stdin WITH (DELIMITER ',', null 'x', PARALLEL 1) ;
+x,45,80,90
+x,\x,\\x,\\\x
+x,\,,\\\,,\\
+\.
+
+COPY test_parallel_copy FROM stdin WITH (DELIMITER ';', NULL '', PARALLEL 1);
+3000;;c;;
+\.
+
+COPY test_parallel_copy FROM stdin WITH (DELIMITER ':', NULL E'\\X', ENCODING 'sql_ascii', PARALLEL 1);
+4000:\X:C:\X:\X
+4001:1:empty::
+4002:2:null:\X:\X
+4003:3:Backslash:\\:\\
+4004:4:BackslashX:\\X:\\X
+4005:5:N:\N:\N
+4006:6:BackslashN:\\N:\\N
+4007:7:XX:\XX:\XX
+4008:8:Delimiter:\::\:
+\.
+
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1) WHERE a = 50004;
+50003	24	34	44	54
+50004	25	35	45 	55
+50005	26	36	46	56
+\.
+
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1) WHERE a > 60003;
+60001	22	32	42	52
+60002	23	33	43	53
+60003	24	34	44	54
+60004	25	35	45	55
+60005	26	36	46	56
+\.
+
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1) WHERE f > 60003;
+
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1) WHERE a = max(x.b);
+
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1) WHERE a IN (SELECT 1 FROM x);
+
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1) WHERE a IN (generate_series(1,5));
+
+COPY test_parallel_copy FROM stdin WITH(PARALLEL 1) WHERE a = row_number() over(b);
+
+-- check results of copy in
+SELECT * FROM test_parallel_copy ORDER BY 1;
+
+-- parallel copy test for unlogged tables. should execute in parallel worker
+CREATE UNLOGGED TABLE test_parallel_copy_unlogged(
+        a INT,
+        b INT,
+        c TEXT default 'stuff',
+        d TEXT,
+        e TEXT
+);
+
+COPY test_parallel_copy_unlogged FROM stdin WITH (PARALLEL 1);
+1	1	test_c1	test_d1	test_e1
+2	2	test_c2	test_d2	test_e2
+\.
+
+SELECT count(*) FROM test_parallel_copy_unlogged;
+
+-- parallel copy test for various trigger types
+TRUNCATE test_parallel_copy;
+
+-- parallel safe trigger function
+CREATE OR REPLACE FUNCTION parallel_copy_trig_func() RETURNS TRIGGER
+LANGUAGE plpgsql PARALLEL SAFE AS $$
+BEGIN
+  RETURN NEW;
+END;
+$$;
+
+-- before insert row trigger
+CREATE TRIGGER parallel_copy_trig
+BEFORE INSERT ON test_parallel_copy
+FOR EACH ROW
+EXECUTE PROCEDURE parallel_copy_trig_func();
+
+-- no parallelism should be picked
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+1	1	test_c1	test_d1	test_e1
+2	2	test_c2	test_d2	test_e2
+\.
+
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy;
+
+-- after insert row trigger
+CREATE TRIGGER parallel_copy_trig
+AFTER INSERT ON test_parallel_copy
+FOR EACH ROW
+EXECUTE PROCEDURE parallel_copy_trig_func();
+
+-- no parallelism should be picked
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+1	1	test_c1	test_d1	test_e1
+2	2	test_c2	test_d2	test_e2
+\.
+
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy;
+
+-- before insert statement trigger
+CREATE TRIGGER parallel_copy_trig
+BEFORE INSERT ON test_parallel_copy
+FOR EACH STATEMENT
+EXECUTE PROCEDURE parallel_copy_trig_func();
+
+-- parallelism should be picked, since the trigger function is parallel safe
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+1	1	test_c1	test_d1	test_e1
+2	2	test_c2	test_d2	test_e2
+\.
+
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy;
+
+-- after insert statement trigger
+CREATE TRIGGER parallel_copy_trig
+AFTER INSERT ON test_parallel_copy
+FOR EACH STATEMENT
+EXECUTE PROCEDURE parallel_copy_trig_func();
+
+-- no parallelism should be picked
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+1	1	test_c1	test_d1	test_e1
+2	2	test_c2	test_d2	test_e2
+\.
+
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy;
+
+-- transition table is involved
+CREATE TRIGGER parallel_copy_trig
+AFTER INSERT ON test_parallel_copy REFERENCING NEW TABLE AS new_table
+FOR EACH STATEMENT
+EXECUTE PROCEDURE parallel_copy_trig_func();
+
+-- no parallelism should be picked
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+1	1	test_c1	test_d1	test_e1
+2	2	test_c2	test_d2	test_e2
+\.
+
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy;
+
+-- make trigger function parallel unsafe
+ALTER FUNCTION parallel_copy_trig_func PARALLEL UNSAFE;
+
+-- before statement trigger has a parallel unsafe function
+CREATE TRIGGER parallel_copy_trig
+BEFORE INSERT ON test_parallel_copy
+FOR EACH STATEMENT
+EXECUTE PROCEDURE parallel_copy_trig_func();
+
+-- no parallelism should be picked
+COPY test_parallel_copy FROM stdin WITH (PARALLEL 1);
+1	1	test_c1	test_d1	test_e1
+2	2	test_c2	test_d2	test_e2
+\.
+
+SELECT count(*) FROM test_parallel_copy;
+
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy;
+
+-- instead of insert trigger, no parallelism should be picked
+COPY instead_of_insert_tbl_view FROM stdin WITH(PARALLEL 1);;
+test1
+\.
+
+SELECT count(*) FROM instead_of_insert_tbl_view;
+
+-- parallel copy test for a partitioned table with a before insert trigger on
+-- one of the partition
+ALTER FUNCTION parallel_copy_trig_func PARALLEL SAFE;
+
+CREATE TABLE test_parallel_copy_part (
+        a INT,
+        b INT,
+        c TEXT default 'stuff',
+        d TEXT,
+        e TEXT
+) PARTITION BY LIST (b);
+
+CREATE TABLE test_parallel_copy_part_a1 (c TEXT, b INT, a INT, e TEXT, d TEXT);
+
+CREATE TABLE test_parallel_copy_part_a2 (a INT, c TEXT, b INT, d TEXT, e TEXT);
+
+ALTER TABLE test_parallel_copy_part ATTACH PARTITION test_parallel_copy_part_a1 FOR VALUES IN(1);
+
+ALTER TABLE test_parallel_copy_part ATTACH PARTITION test_parallel_copy_part_a2 FOR VALUES IN(2);
+
+CREATE TRIGGER parallel_copy_trig
+BEFORE INSERT ON test_parallel_copy_part_a2
+FOR EACH ROW
+EXECUTE PROCEDURE parallel_copy_trig_func();
+
+-- Verify that sequential copy is choosen by checking error in not from a parallel worker.
+COPY test_parallel_copy_part FROM stdin WITH (PARALLEL 1);
+1	1	test_c1	test_d1	test_e1
+2	2	test_c2	test_d2	test_e2	test_ne2
+\.
+
+SELECT count(*) FROM test_parallel_copy_part;
+
+DROP TRIGGER parallel_copy_trig ON test_parallel_copy_part_a2;
+
 -- clean up
+DROP TABLE test_copy_ri;
+DROP TABLE test_copy_pk;
+DROP TABLE test_copy_expr;
+DROP TABLE testeoc;
+DROP TABLE testnl;
 DROP TABLE forcetest;
+DROP TABLE test_parallel_copy;
+DROP TABLE test_parallel_copy_unlogged;
+DROP TABLE test_parallel_copy_part;
+DROP TABLE testserial;
+DROP TABLE testnull;
 DROP TABLE vistest;
 DROP FUNCTION truncate_in_subxact();
+DROP FUNCTION parallel_copy_trig_func();
 DROP TABLE x, y;
 DROP TABLE rls_t1 CASCADE;
 DROP ROLE regress_rls_copy_user;
-- 
1.8.3.1