Revert "Fix search_path to a safe value during maintenance operations."

This reverts commit 05e1737351.

contrib/amcheck/verify_nbtree.c

@@ -282,8 +282,6 @@ bt_index_check_internal(Oid indrelid, bool parentcheck, bool heapallindexed,
 		SetUserIdAndSecContext(heaprel->rd_rel->relowner,
 							   save_sec_context | SECURITY_RESTRICTED_OPERATION);
 		save_nestlevel = NewGUCNestLevel();
-		SetConfigOption("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
-						PGC_S_SESSION);
 	}
 	else
 	{

src/backend/access/brin/brin.c

@@ -1066,8 +1066,6 @@ brin_summarize_range(PG_FUNCTION_ARGS)
 		SetUserIdAndSecContext(heapRel->rd_rel->relowner,
 							   save_sec_context | SECURITY_RESTRICTED_OPERATION);
 		save_nestlevel = NewGUCNestLevel();
-		SetConfigOption("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
-						PGC_S_SESSION);
 	}
 	else
 	{

src/backend/catalog/index.c

@@ -1475,8 +1475,6 @@ index_concurrently_build(Oid heapRelationId,
 	SetUserIdAndSecContext(heapRel->rd_rel->relowner,
 						   save_sec_context | SECURITY_RESTRICTED_OPERATION);
 	save_nestlevel = NewGUCNestLevel();
-	SetConfigOption("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
-					PGC_S_SESSION);
 
 	indexRelation = index_open(indexRelationId, RowExclusiveLock);
 
@@ -3008,8 +3006,6 @@ index_build(Relation heapRelation,
 	SetUserIdAndSecContext(heapRelation->rd_rel->relowner,
 						   save_sec_context | SECURITY_RESTRICTED_OPERATION);
 	save_nestlevel = NewGUCNestLevel();
-	SetConfigOption("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
-					PGC_S_SESSION);
 
 	/* Set up initial progress report status */
 	{
@@ -3345,8 +3341,6 @@ validate_index(Oid heapId, Oid indexId, Snapshot snapshot)
 	SetUserIdAndSecContext(heapRelation->rd_rel->relowner,
 						   save_sec_context | SECURITY_RESTRICTED_OPERATION);
 	save_nestlevel = NewGUCNestLevel();
-	SetConfigOption("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
-					PGC_S_SESSION);
 
 	indexRelation = index_open(indexId, RowExclusiveLock);
 
@@ -3607,8 +3601,6 @@ reindex_index(Oid indexId, bool skip_constraint_checks, char persistence,
 	SetUserIdAndSecContext(heapRelation->rd_rel->relowner,
 						   save_sec_context | SECURITY_RESTRICTED_OPERATION);
 	save_nestlevel = NewGUCNestLevel();
-	SetConfigOption("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
-					PGC_S_SESSION);
 
 	if (progress)
 	{

src/backend/commands/analyze.c

@@ -348,8 +348,6 @@ do_analyze_rel(Relation onerel, VacuumParams *params,
 	SetUserIdAndSecContext(onerel->rd_rel->relowner,
 						   save_sec_context | SECURITY_RESTRICTED_OPERATION);
 	save_nestlevel = NewGUCNestLevel();
-	SetConfigOption("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
-					PGC_S_SESSION);
 
 	/* measure elapsed time iff autovacuum logging requires it */
 	if (IsAutoVacuumWorkerProcess() && params->log_min_duration >= 0)

src/backend/commands/cluster.c

@@ -355,8 +355,6 @@ cluster_rel(Oid tableOid, Oid indexOid, ClusterParams *params)
 	SetUserIdAndSecContext(OldHeap->rd_rel->relowner,
 						   save_sec_context | SECURITY_RESTRICTED_OPERATION);
 	save_nestlevel = NewGUCNestLevel();
-	SetConfigOption("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
-					PGC_S_SESSION);
 
 	/*
 	 * Since we may open a new transaction for each relation, we have to check

src/backend/commands/indexcmds.c

@@ -575,8 +575,6 @@ DefineIndex(Oid relationId,
 	int			root_save_nestlevel;
 
 	root_save_nestlevel = NewGUCNestLevel();
-	SetConfigOption("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
-					PGC_S_SESSION);
 
 	/*
 	 * Some callers need us to run with an empty default_tablespace; this is a
@@ -1302,8 +1300,6 @@ DefineIndex(Oid relationId,
 				SetUserIdAndSecContext(childrel->rd_rel->relowner,
 									   child_save_sec_context | SECURITY_RESTRICTED_OPERATION);
 				child_save_nestlevel = NewGUCNestLevel();
-				SetConfigOption("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
-								PGC_S_SESSION);
 
 				/*
 				 * Don't try to create indexes on foreign tables, though. Skip
@@ -3757,8 +3753,6 @@ ReindexRelationConcurrently(Oid relationOid, ReindexParams *params)
 		SetUserIdAndSecContext(heapRel->rd_rel->relowner,
 							   save_sec_context | SECURITY_RESTRICTED_OPERATION);
 		save_nestlevel = NewGUCNestLevel();
-		SetConfigOption("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
-						PGC_S_SESSION);
 
 		/* determine safety of this index for set_indexsafe_procflags */
 		idx->safe = (indexRel->rd_indexprs == NIL &&

src/backend/commands/matview.c

@@ -179,8 +179,6 @@ ExecRefreshMatView(RefreshMatViewStmt *stmt, const char *queryString,
 	SetUserIdAndSecContext(relowner,
 						   save_sec_context | SECURITY_RESTRICTED_OPERATION);
 	save_nestlevel = NewGUCNestLevel();
-	SetConfigOption("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
-					PGC_S_SESSION);
 
 	/* Make sure it is a materialized view. */
 	if (matviewRel->rd_rel->relkind != RELKIND_MATVIEW)

src/backend/commands/vacuum.c

@@ -2172,8 +2172,6 @@ vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
 	SetUserIdAndSecContext(rel->rd_rel->relowner,
 						   save_sec_context | SECURITY_RESTRICTED_OPERATION);
 	save_nestlevel = NewGUCNestLevel();
-	SetConfigOption("search_path", GUC_SAFE_SEARCH_PATH, PGC_USERSET,
-					PGC_S_SESSION);
 
 	/*
 	 * If PROCESS_MAIN is set (the default), it's time to vacuum the main

src/bin/scripts/t/100_vacuumdb.pl

@@ -109,11 +109,15 @@ $node->safe_psql(
   CREATE FUNCTION f1(int) RETURNS int LANGUAGE SQL AS 'SELECT f0($1)';
   CREATE TABLE funcidx (x int);
   INSERT INTO funcidx VALUES (0),(1),(2),(3);
+  CREATE INDEX i0 ON funcidx ((f1(x)));
   CREATE SCHEMA "Foo";
   CREATE TABLE "Foo".bar(id int);
 |);
 $node->command_ok([qw|vacuumdb -Z --table="need""q(uot"(")x") postgres|],
 	'column list');
+$node->command_fails(
+	[qw|vacuumdb -Zt funcidx postgres|],
+	'unqualified name via functional index');
 
 $node->command_fails(
 	[ 'vacuumdb', '--analyze', '--table', 'vactable(c)', 'postgres' ],

src/include/utils/guc.h

@@ -201,12 +201,6 @@ typedef enum
 
 #define GUC_QUALIFIER_SEPARATOR '.'
 
-/*
- * Safe search path when executing code as the table owner, such as during
- * maintenance operations.
- */
-#define GUC_SAFE_SEARCH_PATH "pg_catalog, pg_temp"
-
 /*
  * Bit values in "flags" of a GUC variable.  Note that these don't appear
  * on disk, so we can reassign their values freely.

src/test/modules/test_oat_hooks/expected/test_oat_hooks.out

@@ -89,15 +89,11 @@ NOTICE:  in object access: superuser finished create (subId=0x0) [internal]
 NOTICE:  in process utility: superuser finished CREATE TABLE
 CREATE INDEX regress_test_table_t_idx ON regress_test_table (t);
 NOTICE:  in process utility: superuser attempting CREATE INDEX
-NOTICE:  in object access: superuser attempting namespace search (subId=0x0) [no report on violation, allowed]
-NOTICE:  in object access: superuser finished namespace search (subId=0x0) [no report on violation, allowed]
 NOTICE:  in object access: superuser attempting create (subId=0x0) [explicit]
 NOTICE:  in object access: superuser finished create (subId=0x0) [explicit]
 NOTICE:  in process utility: superuser finished CREATE INDEX
 GRANT SELECT ON Table regress_test_table TO public;
 NOTICE:  in process utility: superuser attempting GRANT
-NOTICE:  in object access: superuser attempting namespace search (subId=0x0) [no report on violation, allowed]
-NOTICE:  in object access: superuser finished namespace search (subId=0x0) [no report on violation, allowed]
 NOTICE:  in process utility: superuser finished GRANT
 CREATE FUNCTION regress_test_func (t text) RETURNS text AS $$
 	SELECT $1;

src/test/regress/expected/privileges.out

@@ -1769,7 +1769,7 @@ SET SESSION AUTHORIZATION regress_sro_user;
 CREATE FUNCTION unwanted_grant() RETURNS void LANGUAGE sql AS
 	'GRANT regress_priv_group2 TO regress_sro_user';
 CREATE FUNCTION mv_action() RETURNS bool LANGUAGE sql AS
-	'DECLARE c CURSOR WITH HOLD FOR SELECT public.unwanted_grant(); SELECT true';
+	'DECLARE c CURSOR WITH HOLD FOR SELECT unwanted_grant(); SELECT true';
 -- REFRESH of this MV will queue a GRANT at end of transaction
 CREATE MATERIALIZED VIEW sro_mv AS SELECT mv_action() WITH NO DATA;
 REFRESH MATERIALIZED VIEW sro_mv;
@@ -1783,12 +1783,12 @@ SET SESSION AUTHORIZATION regress_sro_user;
 -- INSERT to this table will queue a GRANT at end of transaction
 CREATE TABLE sro_trojan_table ();
 CREATE FUNCTION sro_trojan() RETURNS trigger LANGUAGE plpgsql AS
-	'BEGIN PERFORM public.unwanted_grant(); RETURN NULL; END';
+	'BEGIN PERFORM unwanted_grant(); RETURN NULL; END';
 CREATE CONSTRAINT TRIGGER t AFTER INSERT ON sro_trojan_table
     INITIALLY DEFERRED FOR EACH ROW EXECUTE PROCEDURE sro_trojan();
 -- Now, REFRESH will issue such an INSERT, queueing the GRANT
 CREATE OR REPLACE FUNCTION mv_action() RETURNS bool LANGUAGE sql AS
-	'INSERT INTO public.sro_trojan_table DEFAULT VALUES; SELECT true';
+	'INSERT INTO sro_trojan_table DEFAULT VALUES; SELECT true';
 REFRESH MATERIALIZED VIEW sro_mv;
 ERROR:  cannot fire deferred trigger within security-restricted operation
 CONTEXT:  SQL function "mv_action" statement 1
@@ -1800,15 +1800,15 @@ BEGIN; SET CONSTRAINTS ALL IMMEDIATE; REFRESH MATERIALIZED VIEW sro_mv; COMMIT;
 ERROR:  permission denied to grant role "regress_priv_group2"
 DETAIL:  Only roles with the ADMIN option on role "regress_priv_group2" may grant this role.
 CONTEXT:  SQL function "unwanted_grant" statement 1
-SQL statement "SELECT public.unwanted_grant()"
-PL/pgSQL function public.sro_trojan() line 1 at PERFORM
+SQL statement "SELECT unwanted_grant()"
+PL/pgSQL function sro_trojan() line 1 at PERFORM
 SQL function "mv_action" statement 1
 -- REFRESH MATERIALIZED VIEW CONCURRENTLY use of eval_const_expressions()
 SET SESSION AUTHORIZATION regress_sro_user;
 CREATE FUNCTION unwanted_grant_nofail(int) RETURNS int
 	IMMUTABLE LANGUAGE plpgsql AS $$
 BEGIN
-	PERFORM public.unwanted_grant();
+	PERFORM unwanted_grant();
 	RAISE WARNING 'owned';
 	RETURN 1;
 EXCEPTION WHEN OTHERS THEN

src/test/regress/expected/vacuum.out

@@ -64,7 +64,7 @@ CLUSTER vaccluster;
 CREATE FUNCTION do_analyze() RETURNS VOID VOLATILE LANGUAGE SQL
 	AS 'ANALYZE pg_am';
 CREATE FUNCTION wrap_do_analyze(c INT) RETURNS INT IMMUTABLE LANGUAGE SQL
-	AS 'SELECT $1 FROM public.do_analyze()';
+	AS 'SELECT $1 FROM do_analyze()';
 CREATE INDEX ON vaccluster(wrap_do_analyze(i));
 INSERT INTO vaccluster VALUES (1), (2);
 ANALYZE vaccluster;

src/test/regress/sql/privileges.sql

@@ -1177,7 +1177,7 @@ SET SESSION AUTHORIZATION regress_sro_user;
 CREATE FUNCTION unwanted_grant() RETURNS void LANGUAGE sql AS
 	'GRANT regress_priv_group2 TO regress_sro_user';
 CREATE FUNCTION mv_action() RETURNS bool LANGUAGE sql AS
-	'DECLARE c CURSOR WITH HOLD FOR SELECT public.unwanted_grant(); SELECT true';
+	'DECLARE c CURSOR WITH HOLD FOR SELECT unwanted_grant(); SELECT true';
 -- REFRESH of this MV will queue a GRANT at end of transaction
 CREATE MATERIALIZED VIEW sro_mv AS SELECT mv_action() WITH NO DATA;
 REFRESH MATERIALIZED VIEW sro_mv;
@@ -1188,12 +1188,12 @@ SET SESSION AUTHORIZATION regress_sro_user;
 -- INSERT to this table will queue a GRANT at end of transaction
 CREATE TABLE sro_trojan_table ();
 CREATE FUNCTION sro_trojan() RETURNS trigger LANGUAGE plpgsql AS
-	'BEGIN PERFORM public.unwanted_grant(); RETURN NULL; END';
+	'BEGIN PERFORM unwanted_grant(); RETURN NULL; END';
 CREATE CONSTRAINT TRIGGER t AFTER INSERT ON sro_trojan_table
     INITIALLY DEFERRED FOR EACH ROW EXECUTE PROCEDURE sro_trojan();
 -- Now, REFRESH will issue such an INSERT, queueing the GRANT
 CREATE OR REPLACE FUNCTION mv_action() RETURNS bool LANGUAGE sql AS
-	'INSERT INTO public.sro_trojan_table DEFAULT VALUES; SELECT true';
+	'INSERT INTO sro_trojan_table DEFAULT VALUES; SELECT true';
 REFRESH MATERIALIZED VIEW sro_mv;
 \c -
 REFRESH MATERIALIZED VIEW sro_mv;
@@ -1204,7 +1204,7 @@ SET SESSION AUTHORIZATION regress_sro_user;
 CREATE FUNCTION unwanted_grant_nofail(int) RETURNS int
 	IMMUTABLE LANGUAGE plpgsql AS $$
 BEGIN
-	PERFORM public.unwanted_grant();
+	PERFORM unwanted_grant();
 	RAISE WARNING 'owned';
 	RETURN 1;
 EXCEPTION WHEN OTHERS THEN

src/test/regress/sql/vacuum.sql

@@ -49,7 +49,7 @@ CLUSTER vaccluster;
 CREATE FUNCTION do_analyze() RETURNS VOID VOLATILE LANGUAGE SQL
 	AS 'ANALYZE pg_am';
 CREATE FUNCTION wrap_do_analyze(c INT) RETURNS INT IMMUTABLE LANGUAGE SQL
-	AS 'SELECT $1 FROM public.do_analyze()';
+	AS 'SELECT $1 FROM do_analyze()';
 CREATE INDEX ON vaccluster(wrap_do_analyze(i));
 INSERT INTO vaccluster VALUES (1), (2);
 ANALYZE vaccluster;