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Fix parallel restore of FKs to partitioned tables

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When an FK constraint is created, it needs the index on the referenced
table to exist and be valid.  When doing parallel pg_restore and the
referenced table was partitioned, this condition can sometimes not be
met, because pg_dump didn't emit sufficient object dependencies to
ensure so; this means that parallel pg_restore would fail in certain
conditions.  Fix by having pg_dump make the FK constraint object
dependent on the partition attachment objects for the constraint's
referenced index.

This has been broken since f56f8f8da6af, so backpatch to Postgres 12.

Discussion: https://postgr.es/m/20191005224333.GA9738@alvherre.pgsql
This commit is contained in:
Alvaro Herrera
2019-10-17 09:58:01 +02:00
parent 3af7c64fe7
commit b304b2b65f
5 changed files with 82 additions and 5 deletions
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21
src/fe_utils/simple_list.c
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@ -114,3 +114,24 @@ simple_string_list_not_touched(SimpleStringList *list)
}
return NULL;
}
/*
* Append a pointer to the list.
*
* Caller must ensure that the pointer remains valid.
*/
void
simple_ptr_list_append(SimplePtrList *list, void *ptr)
{
SimplePtrListCell *cell;
cell = (SimplePtrListCell *) pg_malloc(sizeof(SimplePtrListCell));
cell->next = NULL;
cell->ptr = ptr;
if (list->tail)
list->tail->next = cell;
else
list->head = cell;
list->tail = cell;
}