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Don't call CheckAttributeType() with InvalidOid on dropped cols

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If CheckAttributeType() is called with InvalidOid, it performs a bunch
of pointless, futile syscache lookups with InvalidOid, but ultimately
tolerates it and has no effect. We were calling it with InvalidOid on
dropped columns, but it seems accidental that it works, so let's stop
doing it.

Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://www.postgresql.org/message-id/93ce56cd-02a6-4db1-8224-c8999372facc@iki.fi
Backpatch-through: 14
This commit is contained in:
Heikki Linnakangas 2026-04-23 21:05:27 +03:00
parent 54343f6f90
commit d54e754415
1 changed files with 7 additions and 3 deletions
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10
src/backend/catalog/heap.c
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@ -509,9 +509,13 @@ CheckAttributeNamesTypes(TupleDesc tupdesc, char relkind,
*/
for (i = 0; i < natts; i++)
{
CheckAttributeType(NameStr(TupleDescAttr(tupdesc, i)->attname),
TupleDescAttr(tupdesc, i)->atttypid,
TupleDescAttr(tupdesc, i)->attcollation,
Form_pg_attribute attr = TupleDescAttr(tupdesc, i);
if (attr->attisdropped)
continue;
CheckAttributeType(NameStr(attr->attname),
attr->atttypid,
attr->attcollation,
NIL, /* assume we're creating a new rowtype */
flags);
}