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Add an assertion in get_object_address()

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Some places declared a Relation before calling get_object_address()
only to assert that the relation is NULL after the call.

The new assertion allows passing NULL as the relation argument at
those places making the code cleaner and easier to understand.

Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Discussion: https://www.postgresql.org/message-id/ZzG34eNrT83W/Orz@ip-10-97-1-34.eu-west-3.compute.internal
This commit is contained in:
Peter Eisentraut 2024-11-15 08:42:59 +01:00
parent 818119afcc
commit e468ec0fdd
2 changed files with 11 additions and 13 deletions
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7
src/backend/catalog/objectaddress.c
View File

@ -896,7 +896,8 @@ static void getRelationIdentity(StringInfo buffer, Oid relid, List **object,
*
* If the object is a relation or a child object of a relation (e.g. an
* attribute or constraint), the relation is also opened and *relp receives
* the open relcache entry pointer; otherwise, *relp is set to NULL. This
* the open relcache entry pointer; otherwise, *relp is set to NULL.
* (relp can be NULL if the caller never passes a relation-related object.) This
* is a bit grotty but it makes life simpler, since the caller will
* typically need the relcache entry too. Caller must close the relcache
* entry when done with it. The relation is locked with the specified lockmode
@ -1204,7 +1205,11 @@ get_object_address(ObjectType objtype, Node *object,
old_address = address;
}
/* relp must be given if it's a relation */
Assert(!relation || relp);
/* Return the object address and the relation. */
if (relp)
*relp = relation;
return address;
}

15
src/backend/commands/alter.c
View File

@ -421,13 +421,11 @@ ExecRenameStmt(RenameStmt *stmt)
{
ObjectAddress address;
Relation catalog;
Relation relation;
address = get_object_address(stmt->renameType,
stmt->object,
&relation,
NULL,
AccessExclusiveLock, false);
Assert(relation == NULL);
catalog = table_open(address.classId, RowExclusiveLock);
AlterObjectRename_internal(catalog,
@ -482,8 +480,7 @@ ExecAlterObjectDependsStmt(AlterObjectDependsStmt *stmt, ObjectAddress *refAddre
table_close(rel, NoLock);
refAddr = get_object_address(OBJECT_EXTENSION, (Node *) stmt->extname,
&rel, AccessExclusiveLock, false);
Assert(rel == NULL);
NULL, AccessExclusiveLock, false);
if (refAddress)
*refAddress = refAddr;
@ -563,16 +560,14 @@ ExecAlterObjectSchemaStmt(AlterObjectSchemaStmt *stmt,
case OBJECT_TSTEMPLATE:
{
Relation catalog;
Relation relation;
Oid classId;
Oid nspOid;
address = get_object_address(stmt->objectType,
stmt->object,
&relation,
NULL,
AccessExclusiveLock,
false);
Assert(relation == NULL);
classId = address.classId;
catalog = table_open(classId, RowExclusiveLock);
nspOid = LookupCreationNamespace(stmt->newschema);
@ -876,15 +871,13 @@ ExecAlterOwnerStmt(AlterOwnerStmt *stmt)
case OBJECT_TSDICTIONARY:
case OBJECT_TSCONFIGURATION:
{
Relation relation;
ObjectAddress address;
address = get_object_address(stmt->objectType,
stmt->object,
&relation,
NULL,
AccessExclusiveLock,
false);
Assert(relation == NULL);
AlterObjectOwner_internal(address.classId, address.objectId,
newowner);