Refactor recordExtObjInitPriv()

Instead of half a dozen of mostly-duplicate conditional branches,
write one common one that can handle most catalogs.  We already have
all the information we need, such as which system catalog corresponds
to which catalog table and which column is the ACL column.

Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/504bc485-6bd6-dd1b-fe10-e7351aeb310d@enterprisedb.com

Author: petere

src/backend/catalog/aclchk.c

@@ -4241,9 +4241,6 @@ recordDependencyOnNewAcl(Oid classId, Oid objectId, int32 objsubId,
  *
  * For the object passed in, this will record its ACL (if any) and the ACLs of
  * any sub-objects (eg: columns) into pg_init_privs.
- *
- * Any new kinds of objects which have ACLs associated with them and can be
- * added to an extension should be added to the if-else tree below.
  */
 void
 recordExtObjInitPriv(Oid objoid, Oid classoid)
@@ -4336,74 +4333,6 @@ recordExtObjInitPriv(Oid objoid, Oid classoid)
 
 		ReleaseSysCache(tuple);
 	}
-	/* pg_foreign_data_wrapper */
-	else if (classoid == ForeignDataWrapperRelationId)
-	{
-		Datum		aclDatum;
-		bool		isNull;
-		HeapTuple	tuple;
-
-		tuple = SearchSysCache1(FOREIGNDATAWRAPPEROID,
-								ObjectIdGetDatum(objoid));
-		if (!HeapTupleIsValid(tuple))
-			elog(ERROR, "cache lookup failed for foreign data wrapper %u",
-				 objoid);
-
-		aclDatum = SysCacheGetAttr(FOREIGNDATAWRAPPEROID, tuple,
-								   Anum_pg_foreign_data_wrapper_fdwacl,
-								   &isNull);
-
-		/* Add the record, if any, for the top-level object */
-		if (!isNull)
-			recordExtensionInitPrivWorker(objoid, classoid, 0,
-										  DatumGetAclP(aclDatum));
-
-		ReleaseSysCache(tuple);
-	}
-	/* pg_foreign_server */
-	else if (classoid == ForeignServerRelationId)
-	{
-		Datum		aclDatum;
-		bool		isNull;
-		HeapTuple	tuple;
-
-		tuple = SearchSysCache1(FOREIGNSERVEROID, ObjectIdGetDatum(objoid));
-		if (!HeapTupleIsValid(tuple))
-			elog(ERROR, "cache lookup failed for foreign server %u",
-				 objoid);
-
-		aclDatum = SysCacheGetAttr(FOREIGNSERVEROID, tuple,
-								   Anum_pg_foreign_server_srvacl,
-								   &isNull);
-
-		/* Add the record, if any, for the top-level object */
-		if (!isNull)
-			recordExtensionInitPrivWorker(objoid, classoid, 0,
-										  DatumGetAclP(aclDatum));
-
-		ReleaseSysCache(tuple);
-	}
-	/* pg_language */
-	else if (classoid == LanguageRelationId)
-	{
-		Datum		aclDatum;
-		bool		isNull;
-		HeapTuple	tuple;
-
-		tuple = SearchSysCache1(LANGOID, ObjectIdGetDatum(objoid));
-		if (!HeapTupleIsValid(tuple))
-			elog(ERROR, "cache lookup failed for language %u", objoid);
-
-		aclDatum = SysCacheGetAttr(LANGOID, tuple, Anum_pg_language_lanacl,
-								   &isNull);
-
-		/* Add the record, if any, for the top-level object */
-		if (!isNull)
-			recordExtensionInitPrivWorker(objoid, classoid, 0,
-										  DatumGetAclP(aclDatum));
-
-		ReleaseSysCache(tuple);
-	}
 	/* pg_largeobject_metadata */
 	else if (classoid == LargeObjectMetadataRelationId)
 	{
@@ -4446,60 +4375,21 @@ recordExtObjInitPriv(Oid objoid, Oid classoid)
 
 		systable_endscan(scan);
 	}
-	/* pg_namespace */
-	else if (classoid == NamespaceRelationId)
+	/* This will error on unsupported classoid. */
+	else if (get_object_attnum_acl(classoid) != InvalidAttrNumber)
 	{
 		Datum		aclDatum;
 		bool		isNull;
 		HeapTuple	tuple;
 
-		tuple = SearchSysCache1(NAMESPACEOID, ObjectIdGetDatum(objoid));
-		if (!HeapTupleIsValid(tuple))
-			elog(ERROR, "cache lookup failed for schema %u", objoid);
-
-		aclDatum = SysCacheGetAttr(NAMESPACEOID, tuple,
-								   Anum_pg_namespace_nspacl, &isNull);
-
-		/* Add the record, if any, for the top-level object */
-		if (!isNull)
-			recordExtensionInitPrivWorker(objoid, classoid, 0,
-										  DatumGetAclP(aclDatum));
-
-		ReleaseSysCache(tuple);
-	}
-	/* pg_proc */
-	else if (classoid == ProcedureRelationId)
-	{
-		Datum		aclDatum;
-		bool		isNull;
-		HeapTuple	tuple;
-
-		tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(objoid));
-		if (!HeapTupleIsValid(tuple))
-			elog(ERROR, "cache lookup failed for function %u", objoid);
-
-		aclDatum = SysCacheGetAttr(PROCOID, tuple, Anum_pg_proc_proacl,
-								   &isNull);
-
-		/* Add the record, if any, for the top-level object */
-		if (!isNull)
-			recordExtensionInitPrivWorker(objoid, classoid, 0,
-										  DatumGetAclP(aclDatum));
-
-		ReleaseSysCache(tuple);
-	}
-	/* pg_type */
-	else if (classoid == TypeRelationId)
-	{
-		Datum		aclDatum;
-		bool		isNull;
-		HeapTuple	tuple;
-
-		tuple = SearchSysCache1(TYPEOID, ObjectIdGetDatum(objoid));
+		tuple = SearchSysCache1(get_object_catcache_oid(classoid),
+								ObjectIdGetDatum(objoid));
 		if (!HeapTupleIsValid(tuple))
-			elog(ERROR, "cache lookup failed for type %u", objoid);
+			elog(ERROR, "cache lookup failed for %s %u",
+				 get_object_class_descr(classoid), objoid);
 
-		aclDatum = SysCacheGetAttr(TYPEOID, tuple, Anum_pg_type_typacl,
+		aclDatum = SysCacheGetAttr(get_object_catcache_oid(classoid), tuple,
+								   get_object_attnum_acl(classoid),
 								   &isNull);
 
 		/* Add the record, if any, for the top-level object */
@@ -4509,32 +4399,6 @@ recordExtObjInitPriv(Oid objoid, Oid classoid)
 
 		ReleaseSysCache(tuple);
 	}
-	else if (classoid == AccessMethodRelationId ||
-			 classoid == CastRelationId ||
-			 classoid == CollationRelationId ||
-			 classoid == ConversionRelationId ||
-			 classoid == EventTriggerRelationId ||
-			 classoid == OperatorRelationId ||
-			 classoid == OperatorClassRelationId ||
-			 classoid == OperatorFamilyRelationId ||
-			 classoid == TSConfigRelationId ||
-			 classoid == TSDictionaryRelationId ||
-			 classoid == TSParserRelationId ||
-			 classoid == TSTemplateRelationId ||
-			 classoid == TransformRelationId
-		)
-	{
-		/* no ACL for these object types, so do nothing. */
-	}
-
-	/*
-	 * complain if we are given a class OID for a class that extensions don't
-	 * support or that we don't recognize.
-	 */
-	else
-	{
-		elog(ERROR, "unrecognized or unsupported class OID: %u", classoid);
-	}
 }
 
 /*