database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-08-30 06:01:21 +03:00
Code Activity

Reset relhassubclass upon attaching table as a partition

Browse Source 
We don't allow inheritance parents as partitions, and have checks to
prevent this; but if a table _was_ in the past an inheritance parents
and all their children are removed, the pg_class.relhassubclass flag
may remain set, which confuses the partition pruning code (most
obviously, it results in an assertion failure; in production builds it
may be worse.)

Fix by resetting relhassubclass on attach.

Backpatch to all supported versions.

Reported-by: Alexander Lakhin <exclusion@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/18550-d5e047e9a897a889@postgresql.org
This commit is contained in:
Alvaro Herrera
2024-07-24 12:38:18 +02:00
parent 547dd2cbda
commit f74fac06c6
3 changed files with 24 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/backend/catalog/heap.c
View File

@@ -3518,6 +3518,14 @@ StorePartitionBound(Relation rel, Relation parent, PartitionBoundSpec *bound)
new_val, new_null, new_repl);
/* Also set the flag */
((Form_pg_class) GETSTRUCT(newtuple))->relispartition = true;
/*
* We already checked for no inheritance children, but reset
* relhassubclass in case it was left over.
*/
if (rel->rd_rel->relkind == RELKIND_RELATION && rel->rd_rel->relhassubclass)
((Form_pg_class) GETSTRUCT(newtuple))->relhassubclass = false;
CatalogTupleUpdate(classRel, &newtuple->t_self, newtuple);
heap_freetuple(newtuple);
table_close(classRel, RowExclusiveLock);