From: Álvaro Herrera <alvherre@kurilemu.de>
Date: Wed, 16 Jul 2025 17:22:53 +0000 (+0200)
Subject: Fix dumping of comments on invalid constraints on domains
X-Git-Url: http://git.postgresql.org/gitweb/?a=commitdiff_plain;h=5a261c135d43857b3d614399bd6dd0c058dc6bbe;p=postgresql.git

Fix dumping of comments on invalid constraints on domains

We skip dumping constraints together with domains if they are invalid
('separate') so that they appear after data -- but their comments were
dumped together with the domain definition, which in effect leads to the
comment being dumped when the constraint does not yet exist.  Delay
them in the same way.

Oversight in 7eca575d1c28; backpatch all the way back.

Author: jian he <jian.universality@gmail.com>
Discussion: http://postgr.es/m/CACJufxF_C2pe6J_+nPr6C5jf5rQnbYP8XOKr4HM8yHZtp2aQqQ@mail.gmail.com
---

diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index 2c587b8f756..e85f2200b27 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -11168,8 +11168,13 @@ dumpDomain(Archive *fout, const TypeInfo *tyinfo)
 	for (i = 0; i < tyinfo->nDomChecks; i++)
 	{
 		ConstraintInfo *domcheck = &(tyinfo->domChecks[i]);
-		PQExpBuffer conprefix = createPQExpBuffer();
+		PQExpBuffer conprefix;
 
+		/* but only if the constraint itself was dumped here */
+		if (domcheck->separate)
+			continue;
+
+		conprefix = createPQExpBuffer();
 		appendPQExpBuffer(conprefix, "CONSTRAINT %s ON DOMAIN",
 						  fmtId(domcheck->dobj.name));
 
@@ -16805,6 +16810,22 @@ dumpConstraint(Archive *fout, const ConstraintInfo *coninfo)
 										  .section = SECTION_POST_DATA,
 										  .createStmt = q->data,
 										  .dropStmt = delq->data));
+
+			if (coninfo->dobj.dump & DUMP_COMPONENT_COMMENT)
+			{
+				PQExpBuffer conprefix = createPQExpBuffer();
+				char	   *qtypname = pg_strdup(fmtId(tyinfo->dobj.name));
+
+				appendPQExpBuffer(conprefix, "CONSTRAINT %s ON DOMAIN",
+								  fmtId(coninfo->dobj.name));
+
+				dumpComment(fout, conprefix->data, qtypname,
+							tyinfo->dobj.namespace->dobj.name,
+							tyinfo->rolname,
+							coninfo->dobj.catId, 0, tyinfo->dobj.dumpId);
+				destroyPQExpBuffer(conprefix);
+				free(qtypname);
+			}
 		}
 	}
 	else
diff --git a/src/test/regress/expected/constraints.out b/src/test/regress/expected/constraints.out
index cf0b80d6169..a5b5795e587 100644
--- a/src/test/regress/expected/constraints.out
+++ b/src/test/regress/expected/constraints.out
@@ -830,3 +830,7 @@ DROP TABLE constraint_comments_tbl;
 DROP DOMAIN constraint_comments_dom;
 DROP ROLE regress_constraint_comments;
 DROP ROLE regress_constraint_comments_noaccess;
+-- Leave some constraints for the pg_upgrade test to pick up
+CREATE DOMAIN constraint_comments_dom AS int;
+ALTER DOMAIN constraint_comments_dom ADD CONSTRAINT inv_ck CHECK (value > 0) NOT VALID;
+COMMENT ON CONSTRAINT inv_ck ON DOMAIN constraint_comments_dom IS 'comment on invalid constraint';
diff --git a/src/test/regress/sql/constraints.sql b/src/test/regress/sql/constraints.sql
index e3e3bea7091..c47db9469f5 100644
--- a/src/test/regress/sql/constraints.sql
+++ b/src/test/regress/sql/constraints.sql
@@ -632,3 +632,9 @@ DROP DOMAIN constraint_comments_dom;
 
 DROP ROLE regress_constraint_comments;
 DROP ROLE regress_constraint_comments_noaccess;
+
+-- Leave some constraints for the pg_upgrade test to pick up
+CREATE DOMAIN constraint_comments_dom AS int;
+
+ALTER DOMAIN constraint_comments_dom ADD CONSTRAINT inv_ck CHECK (value > 0) NOT VALID;
+COMMENT ON CONSTRAINT inv_ck ON DOMAIN constraint_comments_dom IS 'comment on invalid constraint';