v4-0003-Support-global-temporary-sequences.patch

From 7f7ae6335041b6dd730cfcad1d26f35f3722cd41 Mon Sep 17 00:00:00 2001
From: Dean Rasheed <dean.a.rasheed@gmail.com>
Date: Tue, 9 Jun 2026 19:00:09 +0100
Subject: [PATCH v4 3/9] Support global temporary sequences.

---
 src/backend/catalog/global_temp.c           |   5 +
 src/backend/commands/sequence.c             |  66 ++++++++
 src/backend/parser/parse_utilcmd.c          |   3 +-
 src/bin/pg_dump/pg_dump.c                   |   4 +-
 src/bin/psql/describe.c                     |   6 +
 src/include/commands/sequence.h             |   1 +
 src/test/isolation/expected/global-temp.out | 176 ++++++++++----------
 src/test/isolation/specs/global-temp.spec   |   2 +-
 src/test/regress/expected/global_temp.out   | 123 +++++++++-----
 src/test/regress/sql/global_temp.sql        |  10 +-
 10 files changed, 258 insertions(+), 138 deletions(-)

diff --git a/src/backend/catalog/global_temp.c b/src/backend/catalog/global_temp.c
index 4ddadabfa1b..d4de2f02ffb 100644
--- a/src/backend/catalog/global_temp.c
+++ b/src/backend/catalog/global_temp.c
@@ -62,6 +62,7 @@
 #include "access/xlogutils.h"
 #include "catalog/global_temp.h"
 #include "catalog/storage.h"
+#include "commands/sequence.h"
 #include "lib/dshash.h"
 #include "miscadmin.h"
 #include "storage/ipc.h"
@@ -865,6 +866,10 @@ InitGlobalTempRelation(Relation relation)
 			if (nblocks > 0)
 				relation->rd_index->indisvalid = false;
 		}
+
+		/* If it's a sequence, initialize it */
+		if (relation->rd_rel->relkind == RELKIND_SEQUENCE)
+			InitGlobalTempSequence(relation);
 	}
 
 	/* The remaining initialization works as if we had created it locally */
diff --git a/src/backend/commands/sequence.c b/src/backend/commands/sequence.c
index 551667650ba..9a7cace6c37 100644
--- a/src/backend/commands/sequence.c
+++ b/src/backend/commands/sequence.c
@@ -321,6 +321,72 @@ ResetSequence(Oid seq_relid)
 	sequence_close(seq_rel, NoLock);
 }
 
+/*
+ * InitGlobalTempSequence - initialize a global temporary sequence
+ *
+ * This is called the first time a global temporary sequence is accessed from
+ * a backend other than the backend that created it.  On entry, the sequence
+ * should have valid catalog entries, and its physical disk file should have
+ * been created, but be empty.
+ */
+void
+InitGlobalTempSequence(Relation seq_rel)
+{
+	Oid			seq_relid = RelationGetRelid(seq_rel);
+	SeqTable	elm;
+	HeapTuple	pgstuple;
+	Form_pg_sequence pgsform;
+	int64		startv;
+	int			i;
+	Datum		value[SEQ_COL_LASTCOL];
+	bool		null[SEQ_COL_LASTCOL];
+	TupleDesc	tupDesc;
+	HeapTuple	tuple;
+
+	/* Find or create a hash table entry for this sequence */
+	if (seqhashtab == NULL)
+		create_seq_hashtable();
+
+	elm = (SeqTable) hash_search(seqhashtab, &seq_relid, HASH_ENTER, NULL);
+
+	/* Initialize the sequence state */
+	elm->filenumber = seq_rel->rd_rel->relfilenode;
+	elm->lxid = InvalidLocalTransactionId;
+	elm->last_valid = false;
+	elm->last = elm->cached = 0;
+
+	/* Read the sequence definition from pg_sequence */
+	pgstuple = SearchSysCache1(SEQRELID, ObjectIdGetDatum(seq_relid));
+	if (!HeapTupleIsValid(pgstuple))
+		elog(ERROR, "cache lookup failed for sequence %u", seq_relid);
+	pgsform = (Form_pg_sequence) GETSTRUCT(pgstuple);
+	startv = pgsform->seqstart;
+	ReleaseSysCache(pgstuple);
+
+	/* Build a new sequence tuple */
+	for (i = SEQ_COL_FIRSTCOL; i <= SEQ_COL_LASTCOL; i++)
+	{
+		switch (i)
+		{
+			case SEQ_COL_LASTVAL:
+				value[i - 1] = Int64GetDatumFast(startv);
+				break;
+			case SEQ_COL_LOG:
+				value[i - 1] = Int64GetDatum((int64) 0);
+				break;
+			case SEQ_COL_CALLED:
+				value[i - 1] = BoolGetDatum(false);
+				break;
+		}
+		null[i - 1] = false;
+	}
+	tupDesc = RelationGetDescr(seq_rel);
+	tuple = heap_form_tuple(tupDesc, value, null);
+
+	/* Initialize the sequence's data */
+	fill_seq_with_data(seq_rel, tuple);
+}
+
 /*
  * Initialize a sequence's relation with the specified tuple as content
  *
diff --git a/src/backend/parser/parse_utilcmd.c b/src/backend/parser/parse_utilcmd.c
index a049cc67ed6..9fb216752dd 100644
--- a/src/backend/parser/parse_utilcmd.c
+++ b/src/backend/parser/parse_utilcmd.c
@@ -496,7 +496,8 @@ generateSerialExtraStmts(CreateStmtContext *cxt, ColumnDef *column,
 	seqpersistence = cxt->rel ? cxt->rel->rd_rel->relpersistence : cxt->relation->relpersistence;
 	if (loggedEl)
 	{
-		if (seqpersistence == RELPERSISTENCE_TEMP)
+		if (seqpersistence == RELPERSISTENCE_TEMP ||
+			seqpersistence == RELPERSISTENCE_GLOBAL_TEMP)
 			ereport(ERROR,
 					(errcode(ERRCODE_INVALID_TABLE_DEFINITION),
 					 errmsg("cannot set logged status of a temporary sequence"),
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index c31e15aff7a..e3fd28e47f2 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -19613,7 +19613,9 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 		appendPQExpBuffer(query,
 						  "CREATE %sSEQUENCE %s\n",
 						  tbinfo->relpersistence == RELPERSISTENCE_UNLOGGED ?
-						  "UNLOGGED " : "",
+						  "UNLOGGED " :
+						  tbinfo->relpersistence == RELPERSISTENCE_GLOBAL_TEMP ?
+						  "GLOBAL TEMP " : "",
 						  fmtQualifiedDumpable(tbinfo));
 
 		if (seq->seqtype != SEQTYPE_BIGINT)
diff --git a/src/bin/psql/describe.c b/src/bin/psql/describe.c
index 34daeba6e36..7483a1ab72b 100644
--- a/src/bin/psql/describe.c
+++ b/src/bin/psql/describe.c
@@ -1915,6 +1915,12 @@ describeOneTableDetails(const char *schemaname,
 		if (tableinfo.relpersistence == RELPERSISTENCE_UNLOGGED)
 			printfPQExpBuffer(&title, _("Unlogged sequence \"%s.%s\""),
 							  schemaname, relationname);
+		else if (tableinfo.relpersistence == RELPERSISTENCE_TEMP)
+			printfPQExpBuffer(&title, _("Temporary sequence \"%s.%s\""),
+							  schemaname, relationname);
+		else if (tableinfo.relpersistence == RELPERSISTENCE_GLOBAL_TEMP)
+			printfPQExpBuffer(&title, _("Global temporary sequence \"%s.%s\""),
+							  schemaname, relationname);
 		else
 			printfPQExpBuffer(&title, _("Sequence \"%s.%s\""),
 							  schemaname, relationname);
diff --git a/src/include/commands/sequence.h b/src/include/commands/sequence.h
index 2c3c4a3f074..6f514ac6dd1 100644
--- a/src/include/commands/sequence.h
+++ b/src/include/commands/sequence.h
@@ -47,6 +47,7 @@ extern ObjectAddress AlterSequence(ParseState *pstate, AlterSeqStmt *stmt);
 extern void SequenceChangePersistence(Oid relid, char newrelpersistence);
 extern void DeleteSequenceTuple(Oid relid);
 extern void ResetSequence(Oid seq_relid);
+extern void InitGlobalTempSequence(Relation seq_rel);
 extern void SetSequence(Oid relid, int64 next, bool iscalled);
 extern void ResetSequenceCaches(void);
 
diff --git a/src/test/isolation/expected/global-temp.out b/src/test/isolation/expected/global-temp.out
index 78d944d34f8..748188f5393 100644
--- a/src/test/isolation/expected/global-temp.out
+++ b/src/test/isolation/expected/global-temp.out
@@ -4,15 +4,15 @@ starting permutation: ins1 ins2 sel1 sel2
 step ins1: INSERT INTO tmp VALUES (1, 's1');
 step ins2: INSERT INTO tmp VALUES (1, 's2');
 step sel1: SELECT * FROM tmp;
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2: SELECT * FROM tmp;
-key|val
----+---
-  1|s2 
+key|val|seq
+---+---+---
+  1|s2 |  1
 (1 row)
 
 
@@ -41,28 +41,28 @@ step ins1: INSERT INTO tmp VALUES (1, 's1');
 step b2: BEGIN;
 step ins2: INSERT INTO tmp VALUES (1, 's2');
 step sel1: SELECT * FROM tmp;
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2: SELECT * FROM tmp;
-key|val
----+---
-  1|s2 
+key|val|seq
+---+---+---
+  1|s2 |  1
 (1 row)
 
 step c2: COMMIT;
 step sel1: SELECT * FROM tmp;
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2: SELECT * FROM tmp;
-key|val
----+---
-  1|s2 
+key|val|seq
+---+---+---
+  1|s2 |  1
 (1 row)
 
 
@@ -71,27 +71,27 @@ step ins1: INSERT INTO tmp VALUES (1, 's1');
 step b2: BEGIN;
 step ins2: INSERT INTO tmp VALUES (1, 's2');
 step sel1: SELECT * FROM tmp;
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2: SELECT * FROM tmp;
-key|val
----+---
-  1|s2 
+key|val|seq
+---+---+---
+  1|s2 |  1
 (1 row)
 
 step r2: ROLLBACK;
 step sel1: SELECT * FROM tmp;
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2: SELECT * FROM tmp;
-key|val
----+---
+key|val|seq
+---+---+---
 (0 rows)
 
 
@@ -100,28 +100,28 @@ step ins1: INSERT INTO tmp VALUES (1, 's1');
 step b2: BEGIN;
 step ins2: INSERT INTO tmp VALUES (1, 's2');
 step sel1: SELECT * FROM tmp;
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2: SELECT * FROM tmp;
-key|val
----+---
-  1|s2 
+key|val|seq
+---+---+---
+  1|s2 |  1
 (1 row)
 
 step sp2: SAVEPOINT sp;
 step r2: ROLLBACK;
 step sel1: SELECT * FROM tmp;
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2: SELECT * FROM tmp;
-key|val
----+---
+key|val|seq
+---+---+---
 (0 rows)
 
 
@@ -131,39 +131,39 @@ step b2: BEGIN;
 step sp2: SAVEPOINT sp;
 step ins2: INSERT INTO tmp VALUES (1, 's2');
 step sel1: SELECT * FROM tmp;
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2: SELECT * FROM tmp;
-key|val
----+---
-  1|s2 
+key|val|seq
+---+---+---
+  1|s2 |  1
 (1 row)
 
 step rsp2: ROLLBACK TO SAVEPOINT sp;
 step sel1: SELECT * FROM tmp;
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2: SELECT * FROM tmp;
-key|val
----+---
+key|val|seq
+---+---+---
 (0 rows)
 
 step r2: ROLLBACK;
 step sel1: SELECT * FROM tmp;
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2: SELECT * FROM tmp;
-key|val
----+---
+key|val|seq
+---+---+---
 (0 rows)
 
 
@@ -175,27 +175,27 @@ step sp2: SAVEPOINT sp;
 step t2: TRUNCATE tmp;
 step rsp2: ROLLBACK TO SAVEPOINT sp;
 step sel1: SELECT * FROM tmp;
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2: SELECT * FROM tmp;
-key|val
----+---
-  1|s2 
+key|val|seq
+---+---+---
+  1|s2 |  1
 (1 row)
 
 step r2: ROLLBACK;
 step sel1: SELECT * FROM tmp;
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2: SELECT * FROM tmp;
-key|val
----+---
+key|val|seq
+---+---+---
 (0 rows)
 
 
@@ -257,9 +257,9 @@ Index Scan using tmp_val_idx on tmp
   Index Cond: (val = 's1'::text)   
 (2 rows)
 
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step ins2: INSERT INTO tmp VALUES (1, 's2');
@@ -276,9 +276,9 @@ Index Scan using tmp_val_idx on tmp
   Index Cond: (val = 's2'::text)   
 (2 rows)
 
-key|val
----+---
-  1|s2 
+key|val|seq
+---+---+---
+  1|s2 |  1
 (1 row)
 
 
@@ -299,9 +299,9 @@ Index Scan using tmp_val_idx on tmp
   Index Cond: (val = 's1'::text)   
 (2 rows)
 
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2_idx: 
@@ -318,9 +318,9 @@ Seq Scan on tmp
   Filter: (val = 's2'::text)
 (3 rows)
 
-key|val
----+---
-  1|s2 
+key|val|seq
+---+---+---
+  1|s2 |  1
 (1 row)
 
 
@@ -341,9 +341,9 @@ Index Scan using tmp_val_idx on tmp
   Index Cond: (val = 's1'::text)   
 (2 rows)
 
-key|val
----+---
-  1|s1 
+key|val|seq
+---+---+---
+  1|s1 |  1
 (1 row)
 
 step sel2_idx: 
@@ -360,9 +360,9 @@ Seq Scan on tmp
   Filter: (val = 's2'::text)
 (3 rows)
 
-key|val
----+---
-  1|s2 
+key|val|seq
+---+---+---
+  1|s2 |  1
 (1 row)
 
 step reidx2: REINDEX INDEX tmp_val_idx;
@@ -379,8 +379,8 @@ Index Scan using tmp_val_idx on tmp
   Index Cond: (val = 's2'::text)   
 (2 rows)
 
-key|val
----+---
-  1|s2 
+key|val|seq
+---+---+---
+  1|s2 |  1
 (1 row)
 
diff --git a/src/test/isolation/specs/global-temp.spec b/src/test/isolation/specs/global-temp.spec
index f33170260ce..0099ef86a1a 100644
--- a/src/test/isolation/specs/global-temp.spec
+++ b/src/test/isolation/specs/global-temp.spec
@@ -1,7 +1,7 @@
 # Test global temporary relations
 
 setup {
-  CREATE GLOBAL TEMP TABLE tmp (key int PRIMARY KEY, val text);
+  CREATE GLOBAL TEMP TABLE tmp (key int PRIMARY KEY, val text, seq serial);
 
   CREATE GLOBAL TEMP TABLE tmp_parted (key int PRIMARY KEY, val text) PARTITION BY LIST (key);
   CREATE GLOBAL TEMP TABLE tmp_p1 PARTITION OF tmp_parted FOR VALUES IN (1);
diff --git a/src/test/regress/expected/global_temp.out b/src/test/regress/expected/global_temp.out
index 41f7075f863..6745146de9f 100644
--- a/src/test/regress/expected/global_temp.out
+++ b/src/test/regress/expected/global_temp.out
@@ -13,16 +13,17 @@ CREATE GLOBAL TEMP TABLE pg_temp.tmp1 (a int); -- fail
 ERROR:  cannot create global temporary relation in temporary schema
 LINE 1: CREATE GLOBAL TEMP TABLE pg_temp.tmp1 (a int);
                                  ^
-CREATE GLOBAL TEMP TABLE tmp1 (a int PRIMARY KEY, b text);
+CREATE GLOBAL TEMP TABLE tmp1 (a int PRIMARY KEY, b text, c serial);
 CREATE SCHEMA global_temp_xxx CREATE GLOBAL TEMP TABLE tmp2 (a int);
 CREATE SCHEMA global_temp_yyy;
 CREATE GLOBAL TEMP TABLE global_temp_yyy.tmp3 (a int);
 \d tmp1
-  Global temporary table "global_temp_tests.tmp1"
- Column |  Type   | Collation | Nullable | Default 
---------+---------+-----------+----------+---------
+              Global temporary table "global_temp_tests.tmp1"
+ Column |  Type   | Collation | Nullable |             Default             
+--------+---------+-----------+----------+---------------------------------
  a      | integer |           | not null | 
  b      | text    |           |          | 
+ c      | integer |           | not null | nextval('tmp1_c_seq'::regclass)
 Indexes:
     "tmp1_pkey" PRIMARY KEY, btree (a)
 
@@ -54,16 +55,16 @@ NOTICE:  drop cascades to table global_temp_yyy.tmp3
 -- Basic tests
 INSERT INTO tmp1 VALUES (1, 'xxx');
 SELECT * FROM tmp1;
- a |  b  
----+-----
- 1 | xxx
+ a |  b  | c 
+---+-----+---
+ 1 | xxx | 1
 (1 row)
 
 \c
 SET search_path = global_temp_tests;
 SELECT * FROM tmp1;
- a | b 
----+---
+ a | b | c 
+---+---+---
 (0 rows)
 
 -- Test index
@@ -78,9 +79,9 @@ SELECT * FROM tmp1 WHERE a = 1;
 (2 rows)
 
 SELECT * FROM tmp1 WHERE a = 1;
- a |  b  
----+-----
- 1 | xxx
+ a |  b  | c 
+---+-----+---
+ 1 | xxx | 1
 (1 row)
 
 RESET enable_seqscan;
@@ -96,9 +97,9 @@ SELECT * FROM tmp1 WHERE b = 'xxx';
 (2 rows)
 
 SELECT * FROM tmp1 WHERE b = 'xxx';
- a |  b  
----+-----
- 1 | xxx
+ a |  b  | c 
+---+-----+---
+ 1 | xxx | 1
 (1 row)
 
 RESET enable_seqscan;
@@ -128,9 +129,9 @@ ERROR:  ON COMMIT DROP cannot be used on global temporary tables
 -- Two-phase commit not allowed with global temp tables
 BEGIN;
 SELECT * FROM tmp1;
- a |  b  
----+-----
- 1 | xxx
+ a |  b  | c 
+---+-----+---
+ 1 | xxx | 1
 (1 row)
 
 PREPARE TRANSACTION 'twophase'; -- fail
@@ -256,83 +257,113 @@ INSERT INTO tmp1 VALUES (1, 'xxx');
 BEGIN;
 TRUNCATE tmp1;
 SELECT * FROM tmp1;
- a | b 
----+---
+ a | b | c 
+---+---+---
 (0 rows)
 
 ROLLBACK;
 SELECT * FROM tmp1;
- a |  b  
----+-----
- 1 | xxx
+ a |  b  | c 
+---+-----+---
+ 1 | xxx | 1
 (1 row)
 
 BEGIN;
 SAVEPOINT sp1;
 TRUNCATE tmp1;
 SELECT * FROM tmp1;
- a | b 
----+---
+ a | b | c 
+---+---+---
 (0 rows)
 
 RELEASE sp1;
 SELECT * FROM tmp1;
- a | b 
----+---
+ a | b | c 
+---+---+---
 (0 rows)
 
 ROLLBACK;
 SELECT * FROM tmp1;
- a |  b  
----+-----
- 1 | xxx
+ a |  b  | c 
+---+-----+---
+ 1 | xxx | 1
 (1 row)
 
 BEGIN;
 SAVEPOINT sp1;
 TRUNCATE tmp1;
 SELECT * FROM tmp1;
- a | b 
----+---
+ a | b | c 
+---+---+---
 (0 rows)
 
 ROLLBACK TO sp1;
 SELECT * FROM tmp1;
- a |  b  
----+-----
- 1 | xxx
+ a |  b  | c 
+---+-----+---
+ 1 | xxx | 1
 (1 row)
 
 COMMIT;
 SELECT * FROM tmp1;
- a |  b  
----+-----
- 1 | xxx
+ a |  b  | c 
+---+-----+---
+ 1 | xxx | 1
 (1 row)
 
 TRUNCATE tmp1;
 SELECT * FROM tmp1;
- a | b 
----+---
+ a | b | c 
+---+---+---
 (0 rows)
 
 -- Test view creation
 INSERT INTO tmp1 VALUES (1, 'xxx');
 CREATE VIEW v AS SELECT * FROM tmp1;
 SELECT * FROM v;
- a |  b  
----+-----
- 1 | xxx
+ a |  b  | c 
+---+-----+---
+ 1 | xxx | 2
 (1 row)
 
 DROP VIEW v;
 CREATE TEMP VIEW v AS SELECT * FROM tmp1;
 SELECT * FROM v;
- a |  b  
----+-----
- 1 | xxx
+ a |  b  | c 
+---+-----+---
+ 1 | xxx | 2
 (1 row)
 
 DROP VIEW v;
 CREATE GLOBAL TEMP VIEW v AS SELECT * FROM tmp1; -- fail
 ERROR:  views cannot be global temporary because they do not have storage
+-- Test global temp sequence
+CREATE GLOBAL TEMP SEQUENCE s MINVALUE 100 MAXVALUE 130 INCREMENT 10 START WITH 110 CYCLE;
+\d s
+         Global temporary sequence "global_temp_tests.s"
+  Type  | Start | Minimum | Maximum | Increment | Cycles? | Cache 
+--------+-------+---------+---------+-----------+---------+-------
+ bigint |   110 |     100 |     130 |        10 | yes     |     1
+
+SELECT nextval('s') FROM generate_series(1, 5);
+ nextval 
+---------
+     110
+     120
+     130
+     100
+     110
+(5 rows)
+
+\c
+SET search_path = global_temp_tests;
+SELECT nextval('s') FROM generate_series(1, 5);
+ nextval 
+---------
+     110
+     120
+     130
+     100
+     110
+(5 rows)
+
diff --git a/src/test/regress/sql/global_temp.sql b/src/test/regress/sql/global_temp.sql
index f8e04933b81..0a677557a71 100644
--- a/src/test/regress/sql/global_temp.sql
+++ b/src/test/regress/sql/global_temp.sql
@@ -11,7 +11,7 @@ SET ROLE regress_global_temp_user;
 
 -- Test table creation
 CREATE GLOBAL TEMP TABLE pg_temp.tmp1 (a int); -- fail
-CREATE GLOBAL TEMP TABLE tmp1 (a int PRIMARY KEY, b text);
+CREATE GLOBAL TEMP TABLE tmp1 (a int PRIMARY KEY, b text, c serial);
 CREATE SCHEMA global_temp_xxx CREATE GLOBAL TEMP TABLE tmp2 (a int);
 CREATE SCHEMA global_temp_yyy;
 CREATE GLOBAL TEMP TABLE global_temp_yyy.tmp3 (a int);
@@ -180,3 +180,11 @@ SELECT * FROM v;
 DROP VIEW v;
 
 CREATE GLOBAL TEMP VIEW v AS SELECT * FROM tmp1; -- fail
+
+-- Test global temp sequence
+CREATE GLOBAL TEMP SEQUENCE s MINVALUE 100 MAXVALUE 130 INCREMENT 10 START WITH 110 CYCLE;
+\d s
+SELECT nextval('s') FROM generate_series(1, 5);
+\c
+SET search_path = global_temp_tests;
+SELECT nextval('s') FROM generate_series(1, 5);
-- 
2.51.0