Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Add some recursion and looping defenses in prepjointree.c.
Andrey Lepikhov demonstrated a case where we spend an unreasonable amount of time in pull_up_subqueries(). Not only is that recursing with no explicit check for stack overrun, but the code seems not interruptable by control-C. Let's stick a CHECK_FOR_INTERRUPTS there, along with sprinkling some stack depth checks. An actual fix for the excessive time consumption seems a bit risky to back-patch; but this isn't, so let's do so. Discussion: https://postgr.es/m/703c09a2-08f3-d2ec-b33d-dbecd62428b8@postgrespro.ru
- Loading branch information