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postgres_fdw: Fix interaction of PHVs with child joins.

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Commit f49842d1ee introduced the
concept of a child join, but did not update this code accordingly.

Ashutosh Bapat, with cosmetic changes by me

Discussion: http://postgr.es/m/CAFjFpRf=J_KPOtw+bhZeURYkbizr8ufSaXg6gPEF6DKpgH-t6g@mail.gmail.com
This commit is contained in:
Robert Haas
2018-02-22 10:03:14 -05:00
parent de6428afe1
commit 84cb51b4e2
3 changed files with 50 additions and 1 deletions
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6
contrib/postgres_fdw/postgres_fdw.c
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@ -4565,7 +4565,11 @@ foreign_join_ok(PlannerInfo *root, RelOptInfo *joinrel, JoinType jointype,
foreach(lc, root->placeholder_list)
{
PlaceHolderInfo *phinfo = lfirst(lc);
Relids relids = joinrel->relids;
Relids relids;
/* PlaceHolderInfo refers to parent relids, not child relids. */
relids = IS_OTHER_REL(joinrel) ?
joinrel->top_parent_relids : joinrel->relids;
if (bms_is_subset(phinfo->ph_eval_at, relids) &&
bms_nonempty_difference(relids, phinfo->ph_eval_at))