diff options
| author | Alvaro Herrera | 2020-05-06 16:29:41 +0000 |
|---|---|---|
| committer | Alvaro Herrera | 2020-05-06 16:29:41 +0000 |
| commit | 5be594caf818e0b5e33f8dec191f2707394a6d95 (patch) | |
| tree | 70b45229d9dbe7d4ca66da924b413542e11946c0 /src/include | |
| parent | f21599311e50a43c90a3d33ef4f60193a774321a (diff) | |
Heed lock protocol in DROP OWNED BY
We were acquiring object locks then deleting objects one by one, instead
of acquiring all object locks first, ignoring those that did not exist,
and then deleting all objects together. The latter is the correct
protocol to use, and what this commits changes to code to do. Failing
to follow that leads to "cache lookup failed for relation XYZ" error
reports when DROP OWNED runs concurrently with other DDL -- for example,
a session termination that removes some temp tables.
Author: Álvaro Herrera
Reported-by: Mithun Chicklore Yogendra (Mithun CY)
Reviewed-by: Ahsan Hadi, Tom Lane
Discussion: https://postgr.es/m/CADq3xVZTbzK4ZLKq+dn_vB4QafXXbmMgDP3trY-GuLnib2Ai1w@mail.gmail.com
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/catalog/dependency.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/include/catalog/dependency.h b/src/include/catalog/dependency.h index 2c6abe26a5a..a8f7e9965b7 100644 --- a/src/include/catalog/dependency.h +++ b/src/include/catalog/dependency.h @@ -142,6 +142,10 @@ typedef enum ObjectClass /* in dependency.c */ +extern void AcquireDeletionLock(const ObjectAddress *object, int flags); + +extern void ReleaseDeletionLock(const ObjectAddress *object); + extern void performDeletion(const ObjectAddress *object, DropBehavior behavior, int flags); |