Fix dumping of casts and transforms using built-in functions

In pg_dump.c dumpCast() and dumpTransform(), we would happily ignore the
cast or transform if it happened to use a built-in function because we
weren't including the information about built-in functions when querying
pg_proc from getFuncs().

Modify the query in getFuncs() to also gather information about
functions which are used by user-defined casts and transforms (where
"user-defined" means "has an OID >= FirstNormalObjectId").  This also
adds to the TAP regression tests for 9.6 and master to cover these
types of objects.

Back-patch all the way for casts, back to 9.5 for transforms.

Discussion: https://www.postgresql.org/message-id/flat/20160504183952.GE10850%40tamriel.snowman.net

1 files changed, 24 insertions, 6 deletions

diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index 5b9f5751e47..cd67082a8f4 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -4506,7 +4506,9 @@ getFuncs(Archive *fout, int *numFuncs)
 	 * 3. Otherwise, we normally exclude functions in pg_catalog.  However, if
 	 * they're members of extensions and we are in binary-upgrade mode then
 	 * include them, since we want to dump extension members individually in
-	 * that mode.
+	 * that mode.  Also, if they are used by casts or transforms then we need
+	 * to gather the information about them, though they won't be dumped if
+	 * they are built-in.
 	 */
 
 	if (fout->remoteVersion >= 70300)
@@ -4524,11 +4526,24 @@ getFuncs(Archive *fout, int *numFuncs)
 							   "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
 								 "WHERE classid = 'pg_proc'::regclass AND "
 								 "objid = p.oid AND deptype = 'i')");
-		appendPQExpBufferStr(query,
+		appendPQExpBuffer(query,
 							 "\n  AND ("
 							 "\n  pronamespace != "
 							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
+							 "WHERE nspname = 'pg_catalog')"
+							 "\n  OR EXISTS (SELECT 1 FROM pg_cast"
+							 "\n  WHERE pg_cast.oid > '%u'::oid"
+							 "\n  AND p.oid = pg_cast.castfunc)",
+							 g_last_builtin_oid);
+
+		if (fout->remoteVersion >= 90500)
+			appendPQExpBuffer(query,
+								 "\n  OR EXISTS (SELECT 1 FROM pg_transform"
+								 "\n  WHERE pg_transform.oid > %u::oid"
+								 "\n  AND (p.oid = pg_transform.trffromsql"
+								 "\n  OR p.oid = pg_transform.trftosql))",
+								 g_last_builtin_oid);
+
 		if (dopt->binary_upgrade && fout->remoteVersion >= 90100)
 			appendPQExpBufferStr(query,
 							   "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
@@ -10835,7 +10850,8 @@ dumpCast(Archive *fout, CastInfo *cast)
 	{
 		funcInfo = findFuncByOid(cast->castfunc);
 		if (funcInfo == NULL)
-			return;
+			exit_horribly(NULL, "unable to find function definition for OID %u",
+						  cast->castfunc);
 	}
 
 	/*
@@ -10939,13 +10955,15 @@ dumpTransform(Archive *fout, TransformInfo *transform)
 	{
 		fromsqlFuncInfo = findFuncByOid(transform->trffromsql);
 		if (fromsqlFuncInfo == NULL)
-			return;
+			exit_horribly(NULL, "unable to find function definition for OID %u",
+						  transform->trffromsql);
 	}
 	if (OidIsValid(transform->trftosql))
 	{
 		tosqlFuncInfo = findFuncByOid(transform->trftosql);
 		if (tosqlFuncInfo == NULL)
-			return;
+			exit_horribly(NULL, "unable to find function definition for OID %u",
+						  transform->trftosql);
 	}
 
 	/* Make sure we are in proper schema (needed for getFormattedTypeName) */