database/postgres
database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-05-02 11:44:50 +03:00
Code

Fix possible crash with Parallel Bitmap Heap Scan.

Browse Source 
If a Parallel Bitmap Heap scan's chain of leftmost descendents
includes a BitmapOr whose first child is a BitmapAnd, the prior coding
would mistakenly create a non-shared TIDBitmap and then try to perform
shared iteration.

Report by Tomas Vondra.  Patch by Dilip Kumar.

Discussion: http://postgr.es/m/50e89684-8ad9-dead-8767-c9545bafd3b6@2ndquadrant.com
This commit is contained in:
Robert Haas 2017-10-13 14:53:28 -04:00
parent d48bf6a94d
commit a3b1c22189
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/backend/optimizer/plan/createplan.c
View File

@ -4926,7 +4926,11 @@ bitmap_subplan_mark_shared(Plan *plan)
bitmap_subplan_mark_shared(
linitial(((BitmapAnd *) plan)->bitmapplans));
else if (IsA(plan, BitmapOr))
{
((BitmapOr *) plan)->isshared = true;
bitmap_subplan_mark_shared(
linitial(((BitmapOr *) plan)->bitmapplans));
}
else if (IsA(plan, BitmapIndexScan))
((BitmapIndexScan *) plan)->isshared = true;
else