From 55c0ed8c09b8bd83ced894a349c01f84b7c47e82 Mon Sep 17 00:00:00 2001
From: Laurenz Albe <laurenz.albe@cybertec.at>
Date: Wed, 22 Jan 2025 13:15:27 +0100
Subject: [PATCH v4] Extend ALTER DEFAULT PRIVILEGES for large objects

Previously, ALTER DEFAULT PRIVILEGE didn't support large objects,
so if we want to allow users other than the owner to use the large
object, we need to grant a privilege on it every time a large object
is created.

Author: Haruka Takatsuka
Author: Yugo Nagata
Discussion: https://postgr.es/m/20240424115242.236b499b2bed5b7a27f7a418%40sraoss.co.jp
---
 doc/src/sgml/catalogs.sgml                    |  3 +-
 .../sgml/ref/alter_default_privileges.sgml    | 15 ++-
 src/backend/catalog/aclchk.c                  | 21 +++++
 src/backend/catalog/objectaddress.c           | 18 +++-
 src/backend/catalog/pg_largeobject.c          | 18 +++-
 src/backend/parser/gram.y                     |  5 +-
 src/bin/pg_dump/dumputils.c                   |  3 +-
 src/bin/pg_dump/pg_dump.c                     |  3 +
 src/bin/psql/describe.c                       |  6 +-
 src/bin/psql/tab-complete.in.c                |  2 +-
 src/include/catalog/pg_default_acl.h          |  1 +
 src/include/parser/kwlist.h                   |  1 +
 src/test/regress/expected/privileges.out      | 94 ++++++++++++++++++-
 src/test/regress/sql/privileges.sql           | 36 +++++++
 14 files changed, 215 insertions(+), 11 deletions(-)

diff --git a/doc/src/sgml/catalogs.sgml b/doc/src/sgml/catalogs.sgml
index d3036c5ba9d..47c185916aa 100644
--- a/doc/src/sgml/catalogs.sgml
+++ b/doc/src/sgml/catalogs.sgml
@@ -3338,7 +3338,8 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
        <literal>S</literal> = sequence,
        <literal>f</literal> = function,
        <literal>T</literal> = type,
-       <literal>n</literal> = schema
+       <literal>n</literal> = schema,
+       <literal>L</literal> = large object
       </para></entry>
      </row>
 
diff --git a/doc/src/sgml/ref/alter_default_privileges.sgml b/doc/src/sgml/ref/alter_default_privileges.sgml
index 89aacec4fab..3ab695892da 100644
--- a/doc/src/sgml/ref/alter_default_privileges.sgml
+++ b/doc/src/sgml/ref/alter_default_privileges.sgml
@@ -51,6 +51,11 @@ GRANT { { USAGE | CREATE }
     ON SCHEMAS
     TO { [ GROUP ] <replaceable class="parameter">role_name</replaceable> | PUBLIC } [, ...] [ WITH GRANT OPTION ]
 
+GRANT { { SELECT | UPDATE }
+    [, ...] | ALL [ PRIVILEGES ] }
+    ON LARGE OBJECTS
+    TO { [ GROUP ] <replaceable class="parameter">role_name</replaceable> | PUBLIC } [, ...] [ WITH GRANT OPTION ]
+
 REVOKE [ GRANT OPTION FOR ]
     { { SELECT | INSERT | UPDATE | DELETE | TRUNCATE | REFERENCES | TRIGGER | MAINTAIN }
     [, ...] | ALL [ PRIVILEGES ] }
@@ -83,6 +88,13 @@ REVOKE [ GRANT OPTION FOR ]
     ON SCHEMAS
     FROM { [ GROUP ] <replaceable class="parameter">role_name</replaceable> | PUBLIC } [, ...]
     [ CASCADE | RESTRICT ]
+
+REVOKE [ GRANT OPTION FOR ]
+    { { SELECT | UPDATE }
+    [, ...] | ALL [ PRIVILEGES ] }
+    ON LARGE OBJECTS
+    FROM { [ GROUP ] <replaceable class="parameter">role_name</replaceable> | PUBLIC } [, ...]
+    [ CASCADE | RESTRICT ]
 </synopsis>
  </refsynopsisdiv>
 
@@ -161,7 +173,8 @@ REVOKE [ GRANT OPTION FOR ]
       If <literal>IN SCHEMA</literal> is omitted, the global default privileges
       are altered.
       <literal>IN SCHEMA</literal> is not allowed when setting privileges
-      for schemas, since schemas can't be nested.
+      for schemas and large objects, since schemas can't be nested and
+      large objects don't belong to a schema.
      </para>
     </listitem>
    </varlistentry>
diff --git a/src/backend/catalog/aclchk.c b/src/backend/catalog/aclchk.c
index 02a754cc30a..9ca8a88dc91 100644
--- a/src/backend/catalog/aclchk.c
+++ b/src/backend/catalog/aclchk.c
@@ -1005,6 +1005,10 @@ ExecAlterDefaultPrivilegesStmt(ParseState *pstate, AlterDefaultPrivilegesStmt *s
 			all_privileges = ACL_ALL_RIGHTS_SCHEMA;
 			errormsg = gettext_noop("invalid privilege type %s for schema");
 			break;
+		case OBJECT_LARGEOBJECT:
+			all_privileges = ACL_ALL_RIGHTS_LARGEOBJECT;
+			errormsg = gettext_noop("invalid privilege type %s for large object");
+			break;
 		default:
 			elog(ERROR, "unrecognized GrantStmt.objtype: %d",
 				 (int) action->objtype);
@@ -1196,6 +1200,16 @@ SetDefaultACL(InternalDefaultACL *iacls)
 				this_privileges = ACL_ALL_RIGHTS_SCHEMA;
 			break;
 
+		case OBJECT_LARGEOBJECT:
+			if (OidIsValid(iacls->nspid))
+				ereport(ERROR,
+						(errcode(ERRCODE_INVALID_GRANT_OPERATION),
+						 errmsg("cannot use IN SCHEMA clause when using GRANT/REVOKE ON LARGE OBJECTS")));
+			objtype = DEFACLOBJ_LARGEOBJECT;
+			if (iacls->all_privs && this_privileges == ACL_NO_RIGHTS)
+				this_privileges = ACL_ALL_RIGHTS_LARGEOBJECT;
+			break;
+
 		default:
 			elog(ERROR, "unrecognized object type: %d",
 				 (int) iacls->objtype);
@@ -1439,6 +1453,9 @@ RemoveRoleFromObjectACL(Oid roleid, Oid classid, Oid objid)
 			case DEFACLOBJ_NAMESPACE:
 				iacls.objtype = OBJECT_SCHEMA;
 				break;
+			case DEFACLOBJ_LARGEOBJECT:
+				iacls.objtype = OBJECT_LARGEOBJECT;
+				break;
 			default:
 				/* Shouldn't get here */
 				elog(ERROR, "unexpected default ACL type: %d",
@@ -4250,6 +4267,10 @@ get_user_default_acl(ObjectType objtype, Oid ownerId, Oid nsp_oid)
 			defaclobjtype = DEFACLOBJ_NAMESPACE;
 			break;
 
+		case OBJECT_LARGEOBJECT:
+			defaclobjtype = DEFACLOBJ_LARGEOBJECT;
+			break;
+
 		default:
 			return NULL;
 	}
diff --git a/src/backend/catalog/objectaddress.c b/src/backend/catalog/objectaddress.c
index d8eb8d3deaa..b63fd57dc04 100644
--- a/src/backend/catalog/objectaddress.c
+++ b/src/backend/catalog/objectaddress.c
@@ -2005,16 +2005,20 @@ get_object_address_defacl(List *object, bool missing_ok)
 		case DEFACLOBJ_NAMESPACE:
 			objtype_str = "schemas";
 			break;
+		case DEFACLOBJ_LARGEOBJECT:
+			objtype_str = "large objects";
+			break;
 		default:
 			ereport(ERROR,
 					(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 					 errmsg("unrecognized default ACL object type \"%c\"", objtype),
-					 errhint("Valid object types are \"%c\", \"%c\", \"%c\", \"%c\", \"%c\".",
+					 errhint("Valid object types are \"%c\", \"%c\", \"%c\", \"%c\", \"%c\", \"%c\".",
 							 DEFACLOBJ_RELATION,
 							 DEFACLOBJ_SEQUENCE,
 							 DEFACLOBJ_FUNCTION,
 							 DEFACLOBJ_TYPE,
-							 DEFACLOBJ_NAMESPACE)));
+							 DEFACLOBJ_NAMESPACE,
+							 DEFACLOBJ_LARGEOBJECT)));
 	}
 
 	/*
@@ -3844,6 +3848,12 @@ getObjectDescription(const ObjectAddress *object, bool missing_ok)
 										 _("default privileges on new schemas belonging to role %s"),
 										 rolename);
 						break;
+					case DEFACLOBJ_LARGEOBJECT:
+						Assert(!nspname);
+						appendStringInfo(&buffer,
+										 _("default privileges on new large objects belonging to role %s"),
+										 rolename);
+						break;
 					default:
 						/* shouldn't get here */
 						if (nspname)
@@ -5766,6 +5776,10 @@ getObjectIdentityParts(const ObjectAddress *object,
 						appendStringInfoString(&buffer,
 											   " on schemas");
 						break;
+					case DEFACLOBJ_LARGEOBJECT:
+						appendStringInfoString(&buffer,
+											   " on large objects");
+						break;
 				}
 
 				if (objname)
diff --git a/src/backend/catalog/pg_largeobject.c b/src/backend/catalog/pg_largeobject.c
index 0a477a8e8a9..71a9cc134e1 100644
--- a/src/backend/catalog/pg_largeobject.c
+++ b/src/backend/catalog/pg_largeobject.c
@@ -20,6 +20,7 @@
 #include "catalog/pg_largeobject.h"
 #include "catalog/pg_largeobject_metadata.h"
 #include "miscadmin.h"
+#include "utils/acl.h"
 #include "utils/fmgroids.h"
 #include "utils/rel.h"
 
@@ -39,6 +40,8 @@ LargeObjectCreate(Oid loid)
 	Oid			loid_new;
 	Datum		values[Natts_pg_largeobject_metadata];
 	bool		nulls[Natts_pg_largeobject_metadata];
+	Oid			ownerId;
+	Acl			*lomacl;
 
 	pg_lo_meta = table_open(LargeObjectMetadataRelationId,
 							RowExclusiveLock);
@@ -55,11 +58,18 @@ LargeObjectCreate(Oid loid)
 		loid_new = GetNewOidWithIndex(pg_lo_meta,
 									  LargeObjectMetadataOidIndexId,
 									  Anum_pg_largeobject_metadata_oid);
+	ownerId = GetUserId();
+	lomacl = get_user_default_acl(OBJECT_LARGEOBJECT, ownerId, InvalidOid);
 
 	values[Anum_pg_largeobject_metadata_oid - 1] = ObjectIdGetDatum(loid_new);
 	values[Anum_pg_largeobject_metadata_lomowner - 1]
-		= ObjectIdGetDatum(GetUserId());
-	nulls[Anum_pg_largeobject_metadata_lomacl - 1] = true;
+		= ObjectIdGetDatum(ownerId);
+
+	if (lomacl != NULL)
+		values[Anum_pg_largeobject_metadata_lomacl - 1]
+			= PointerGetDatum(lomacl);
+	else
+		nulls[Anum_pg_largeobject_metadata_lomacl - 1] = true;
 
 	ntup = heap_form_tuple(RelationGetDescr(pg_lo_meta),
 						   values, nulls);
@@ -70,6 +80,10 @@ LargeObjectCreate(Oid loid)
 
 	table_close(pg_lo_meta, RowExclusiveLock);
 
+	/* dependencies on roles mentioned in default ACL */
+	recordDependencyOnNewAcl(LargeObjectRelationId, loid_new, 0,
+							 ownerId, lomacl);
+
 	return loid_new;
 }
 
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index 6079de70e09..9bab74ebb39 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -746,7 +746,7 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query);
 	NOT NOTHING NOTIFY NOTNULL NOWAIT NULL_P NULLIF
 	NULLS_P NUMERIC
 
-	OBJECT_P OF OFF OFFSET OIDS OLD OMIT ON ONLY OPERATOR OPTION OPTIONS OR
+	OBJECT_P OBJECTS_P OF OFF OFFSET OIDS OLD OMIT ON ONLY OPERATOR OPTION OPTIONS OR
 	ORDER ORDINALITY OTHERS OUT_P OUTER_P
 	OVER OVERLAPS OVERLAY OVERRIDING OWNED OWNER
 
@@ -8141,6 +8141,7 @@ defacl_privilege_target:
 			| SEQUENCES		{ $$ = OBJECT_SEQUENCE; }
 			| TYPES_P		{ $$ = OBJECT_TYPE; }
 			| SCHEMAS		{ $$ = OBJECT_SCHEMA; }
+			| LARGE_P OBJECTS_P	{ $$ = OBJECT_LARGEOBJECT; }
 		;
 
 
@@ -17809,6 +17810,7 @@ unreserved_keyword:
 			| NOWAIT
 			| NULLS_P
 			| OBJECT_P
+			| OBJECTS_P
 			| OF
 			| OFF
 			| OIDS
@@ -18430,6 +18432,7 @@ bare_label_keyword:
 			| NULLS_P
 			| NUMERIC
 			| OBJECT_P
+			| OBJECTS_P
 			| OF
 			| OFF
 			| OIDS
diff --git a/src/bin/pg_dump/dumputils.c b/src/bin/pg_dump/dumputils.c
index 5ae77f76367..ab0e9e6da3c 100644
--- a/src/bin/pg_dump/dumputils.c
+++ b/src/bin/pg_dump/dumputils.c
@@ -506,7 +506,8 @@ do { \
 		CONVERT_PRIV('s', "SET");
 		CONVERT_PRIV('A', "ALTER SYSTEM");
 	}
-	else if (strcmp(type, "LARGE OBJECT") == 0)
+	else if (strcmp(type, "LARGE OBJECT") == 0 ||
+			 strcmp(type, "LARGE OBJECTS") == 0)
 	{
 		CONVERT_PRIV('r', "SELECT");
 		CONVERT_PRIV('w', "UPDATE");
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index 8f73a5df956..67c2540cbc6 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -15195,6 +15195,9 @@ dumpDefaultACL(Archive *fout, const DefaultACLInfo *daclinfo)
 		case DEFACLOBJ_NAMESPACE:
 			type = "SCHEMAS";
 			break;
+		case DEFACLOBJ_LARGEOBJECT:
+			type = "LARGE OBJECTS";
+			break;
 		default:
 			/* shouldn't get here */
 			pg_fatal("unrecognized object type in default privileges: %d",
diff --git a/src/bin/psql/describe.c b/src/bin/psql/describe.c
index 2ef99971ac0..4538ea89e17 100644
--- a/src/bin/psql/describe.c
+++ b/src/bin/psql/describe.c
@@ -1221,7 +1221,9 @@ listDefaultACLs(const char *pattern)
 	printfPQExpBuffer(&buf,
 					  "SELECT pg_catalog.pg_get_userbyid(d.defaclrole) AS \"%s\",\n"
 					  "  n.nspname AS \"%s\",\n"
-					  "  CASE d.defaclobjtype WHEN '%c' THEN '%s' WHEN '%c' THEN '%s' WHEN '%c' THEN '%s' WHEN '%c' THEN '%s' WHEN '%c' THEN '%s' END AS \"%s\",\n"
+					  "  CASE d.defaclobjtype "
+					  "    WHEN '%c' THEN '%s' WHEN '%c' THEN '%s' WHEN '%c' THEN '%s'"
+					  "    WHEN '%c' THEN '%s' WHEN '%c' THEN '%s' WHEN '%c' THEN '%s' END AS \"%s\",\n"
 					  "  ",
 					  gettext_noop("Owner"),
 					  gettext_noop("Schema"),
@@ -1235,6 +1237,8 @@ listDefaultACLs(const char *pattern)
 					  gettext_noop("type"),
 					  DEFACLOBJ_NAMESPACE,
 					  gettext_noop("schema"),
+					  DEFACLOBJ_LARGEOBJECT,
+					  gettext_noop("large object"),
 					  gettext_noop("Type"));
 
 	printACLColumn(&buf, "d.defaclacl");
diff --git a/src/bin/psql/tab-complete.in.c b/src/bin/psql/tab-complete.in.c
index 81cbf10aa28..600097da259 100644
--- a/src/bin/psql/tab-complete.in.c
+++ b/src/bin/psql/tab-complete.in.c
@@ -4424,7 +4424,7 @@ match_previous_words(int pattern_id,
 		 * objects supported.
 		 */
 		if (HeadMatches("ALTER", "DEFAULT", "PRIVILEGES"))
-			COMPLETE_WITH("TABLES", "SEQUENCES", "FUNCTIONS", "PROCEDURES", "ROUTINES", "TYPES", "SCHEMAS");
+			COMPLETE_WITH("TABLES", "SEQUENCES", "FUNCTIONS", "PROCEDURES", "ROUTINES", "TYPES", "SCHEMAS", "LARGE OBJECTS");
 		else
 			COMPLETE_WITH_SCHEMA_QUERY_PLUS(Query_for_list_of_grantables,
 											"ALL FUNCTIONS IN SCHEMA",
diff --git a/src/include/catalog/pg_default_acl.h b/src/include/catalog/pg_default_acl.h
index 728024b1fa7..ce6e5098eaf 100644
--- a/src/include/catalog/pg_default_acl.h
+++ b/src/include/catalog/pg_default_acl.h
@@ -68,6 +68,7 @@ MAKE_SYSCACHE(DEFACLROLENSPOBJ, pg_default_acl_role_nsp_obj_index, 8);
 #define DEFACLOBJ_FUNCTION		'f' /* function */
 #define DEFACLOBJ_TYPE			'T' /* type */
 #define DEFACLOBJ_NAMESPACE		'n' /* namespace */
+#define DEFACLOBJ_LARGEOBJECT	'L' /* large object */
 
 #endif							/* EXPOSE_TO_CLIENT_CODE */
 
diff --git a/src/include/parser/kwlist.h b/src/include/parser/kwlist.h
index cf2917ad07e..58e769bce1b 100644
--- a/src/include/parser/kwlist.h
+++ b/src/include/parser/kwlist.h
@@ -308,6 +308,7 @@ PG_KEYWORD("nullif", NULLIF, COL_NAME_KEYWORD, BARE_LABEL)
 PG_KEYWORD("nulls", NULLS_P, UNRESERVED_KEYWORD, BARE_LABEL)
 PG_KEYWORD("numeric", NUMERIC, COL_NAME_KEYWORD, BARE_LABEL)
 PG_KEYWORD("object", OBJECT_P, UNRESERVED_KEYWORD, BARE_LABEL)
+PG_KEYWORD("objects", OBJECTS_P, UNRESERVED_KEYWORD, BARE_LABEL)
 PG_KEYWORD("of", OF, UNRESERVED_KEYWORD, BARE_LABEL)
 PG_KEYWORD("off", OFF, UNRESERVED_KEYWORD, BARE_LABEL)
 PG_KEYWORD("offset", OFFSET, RESERVED_KEYWORD, AS_LABEL)
diff --git a/src/test/regress/expected/privileges.out b/src/test/regress/expected/privileges.out
index 6b01313101b..cf575b46bc8 100644
--- a/src/test/regress/expected/privileges.out
+++ b/src/test/regress/expected/privileges.out
@@ -2637,11 +2637,103 @@ SELECT has_schema_privilege('regress_priv_user2', 'testns4', 'CREATE'); -- yes
 
 ALTER DEFAULT PRIVILEGES REVOKE ALL ON SCHEMAS FROM regress_priv_user2;
 COMMIT;
+--
+-- Test for default privileges on large objects. This is done in a
+-- separate, rollbacked, transaction to avoid any trouble with other
+-- regression sessions.
+--
+BEGIN;
+SELECT lo_create(1007);
+ lo_create 
+-----------
+      1007
+(1 row)
+
+SELECT has_largeobject_privilege('regress_priv_user2', 1007, 'SELECT'); -- no
+ has_largeobject_privilege 
+---------------------------
+ f
+(1 row)
+
+SELECT has_largeobject_privilege('regress_priv_user2', 1007, 'UPDATE'); -- no
+ has_largeobject_privilege 
+---------------------------
+ f
+(1 row)
+
+ALTER DEFAULT PRIVILEGES GRANT SELECT ON LARGE OBJECTS TO regress_priv_user2;
+SELECT lo_create(1008);
+ lo_create 
+-----------
+      1008
+(1 row)
+
+SELECT has_largeobject_privilege('regress_priv_user2', 1008, 'SELECT'); -- yes
+ has_largeobject_privilege 
+---------------------------
+ t
+(1 row)
+
+SELECT has_largeobject_privilege('regress_priv_user6', 1008, 'SELECT'); -- no
+ has_largeobject_privilege 
+---------------------------
+ f
+(1 row)
+
+SELECT has_largeobject_privilege('regress_priv_user2', 1008, 'UPDATE'); -- no
+ has_largeobject_privilege 
+---------------------------
+ f
+(1 row)
+
+ALTER DEFAULT PRIVILEGES GRANT ALL ON LARGE OBJECTS TO regress_priv_user2;
+SELECT lo_create(1009);
+ lo_create 
+-----------
+      1009
+(1 row)
+
+SELECT has_largeobject_privilege('regress_priv_user2', 1009, 'SELECT'); -- true
+ has_largeobject_privilege 
+---------------------------
+ t
+(1 row)
+
+SELECT has_largeobject_privilege('regress_priv_user2', 1009, 'UPDATE'); -- true
+ has_largeobject_privilege 
+---------------------------
+ t
+(1 row)
+
+ALTER DEFAULT PRIVILEGES REVOKE UPDATE ON LARGE OBJECTS FROM regress_priv_user2;
+SELECT lo_create(1010);
+ lo_create 
+-----------
+      1010
+(1 row)
+
+SELECT has_largeobject_privilege('regress_priv_user2', 1010, 'SELECT'); -- true
+ has_largeobject_privilege 
+---------------------------
+ t
+(1 row)
+
+SELECT has_largeobject_privilege('regress_priv_user2', 1010, 'UPDATE'); -- false
+ has_largeobject_privilege 
+---------------------------
+ f
+(1 row)
+
+ROLLBACK;
+ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON LARGE OBJECTS TO public; -- error
+ERROR:  cannot use IN SCHEMA clause when using GRANT/REVOKE ON LARGE OBJECTS
+\c -
 -- Test for DROP OWNED BY with shared dependencies.  This is done in a
 -- separate, rollbacked, transaction to avoid any trouble with other
 -- regression sessions.
 BEGIN;
 ALTER DEFAULT PRIVILEGES GRANT ALL ON FUNCTIONS TO regress_priv_user2;
+ALTER DEFAULT PRIVILEGES GRANT ALL ON LARGE OBJECTS TO regress_priv_user2;
 ALTER DEFAULT PRIVILEGES GRANT ALL ON SCHEMAS TO regress_priv_user2;
 ALTER DEFAULT PRIVILEGES GRANT ALL ON SEQUENCES TO regress_priv_user2;
 ALTER DEFAULT PRIVILEGES GRANT ALL ON TABLES TO regress_priv_user2;
@@ -2652,7 +2744,7 @@ SELECT count(*) FROM pg_shdepend
 	classid = 'pg_default_acl'::regclass;
  count 
 -------
-     5
+     6
 (1 row)
 
 DROP OWNED BY regress_priv_user2, regress_priv_user2;
diff --git a/src/test/regress/sql/privileges.sql b/src/test/regress/sql/privileges.sql
index 60e7443bf59..57c043a0f7d 100644
--- a/src/test/regress/sql/privileges.sql
+++ b/src/test/regress/sql/privileges.sql
@@ -1571,11 +1571,47 @@ ALTER DEFAULT PRIVILEGES REVOKE ALL ON SCHEMAS FROM regress_priv_user2;
 
 COMMIT;
 
+--
+-- Test for default privileges on large objects. This is done in a
+-- separate, rollbacked, transaction to avoid any trouble with other
+-- regression sessions.
+--
+
+BEGIN;
+
+SELECT lo_create(1007);
+SELECT has_largeobject_privilege('regress_priv_user2', 1007, 'SELECT'); -- no
+SELECT has_largeobject_privilege('regress_priv_user2', 1007, 'UPDATE'); -- no
+
+ALTER DEFAULT PRIVILEGES GRANT SELECT ON LARGE OBJECTS TO regress_priv_user2;
+
+SELECT lo_create(1008);
+SELECT has_largeobject_privilege('regress_priv_user2', 1008, 'SELECT'); -- yes
+SELECT has_largeobject_privilege('regress_priv_user6', 1008, 'SELECT'); -- no
+SELECT has_largeobject_privilege('regress_priv_user2', 1008, 'UPDATE'); -- no
+
+ALTER DEFAULT PRIVILEGES GRANT ALL ON LARGE OBJECTS TO regress_priv_user2;
+SELECT lo_create(1009);
+SELECT has_largeobject_privilege('regress_priv_user2', 1009, 'SELECT'); -- true
+SELECT has_largeobject_privilege('regress_priv_user2', 1009, 'UPDATE'); -- true
+
+ALTER DEFAULT PRIVILEGES REVOKE UPDATE ON LARGE OBJECTS FROM regress_priv_user2;
+SELECT lo_create(1010);
+SELECT has_largeobject_privilege('regress_priv_user2', 1010, 'SELECT'); -- true
+SELECT has_largeobject_privilege('regress_priv_user2', 1010, 'UPDATE'); -- false
+
+ROLLBACK;
+
+ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON LARGE OBJECTS TO public; -- error
+
+\c -
+
 -- Test for DROP OWNED BY with shared dependencies.  This is done in a
 -- separate, rollbacked, transaction to avoid any trouble with other
 -- regression sessions.
 BEGIN;
 ALTER DEFAULT PRIVILEGES GRANT ALL ON FUNCTIONS TO regress_priv_user2;
+ALTER DEFAULT PRIVILEGES GRANT ALL ON LARGE OBJECTS TO regress_priv_user2;
 ALTER DEFAULT PRIVILEGES GRANT ALL ON SCHEMAS TO regress_priv_user2;
 ALTER DEFAULT PRIVILEGES GRANT ALL ON SEQUENCES TO regress_priv_user2;
 ALTER DEFAULT PRIVILEGES GRANT ALL ON TABLES TO regress_priv_user2;
-- 
2.48.1

