Movatterモバイル変換

[0]ホーム
URL:

Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly

 Sign up
Appearance settings

Commit630b81d

Browse files
committed
Revert "Allow parallel workers to cope with a newly-created session user ID."
This reverts commit5887dd4.Some buildfarm animals are failing with "cannot change"client_encoding" during a parallel operation". It looks likeassign_client_encoding is unhappy at being asked to roll back aclient_encoding setting after a parallel worker encounters afailure. There must be more to it though: why didn't I see thisduring local testing? In any case, it's clear that moving theRestoreGUCState() call is not as side-effect-free as I thought.Given that the bugf5f30c2 intended to fix has gone unreportedfor years, it's not something that's urgent to fix; I'm notwilling to risk messing with it further with only days to ournext release wrap.
1 parent5887dd4 commit630b81d

File tree

4 files changed

+6
-43
lines changed

4 files changed

+6
-43
lines changed

‎src/backend/access/transam/parallel.c‎

Lines changed: 4 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -1410,6 +1410,10 @@ ParallelWorkerMain(Datum main_arg)
14101410
libraryspace=shm_toc_lookup(toc,PARALLEL_KEY_LIBRARY, false);
14111411
StartTransactionCommand();
14121412
RestoreLibraryState(libraryspace);
1413+
1414+
/* Restore GUC values from launching backend. */
1415+
gucspace=shm_toc_lookup(toc,PARALLEL_KEY_GUC, false);
1416+
RestoreGUCState(gucspace);
14131417
CommitTransactionCommand();
14141418

14151419
/* Crank up a transaction state appropriate to a parallel worker. */
@@ -1451,14 +1455,6 @@ ParallelWorkerMain(Datum main_arg)
14511455
*/
14521456
InvalidateSystemCaches();
14531457

1454-
/*
1455-
* Restore GUC values from launching backend. We can't do this earlier,
1456-
* because GUC check hooks that do catalog lookups need to see the same
1457-
* database state as the leader.
1458-
*/
1459-
gucspace=shm_toc_lookup(toc,PARALLEL_KEY_GUC, false);
1460-
RestoreGUCState(gucspace);
1461-
14621458
/*
14631459
* Restore current role id. Skip verifying whether session user is
14641460
* allowed to become this role and blindly restore the leader's state for

‎src/backend/commands/variable.c‎

Lines changed: 2 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -577,16 +577,14 @@ check_transaction_read_only(bool *newval, void **extra, GucSource source)
577577
* We allow idempotent changes at any time, but otherwise this can only be
578578
* changed in a toplevel transaction that has not yet taken a snapshot.
579579
*
580-
* As in check_transaction_read_only, allow it if not inside a transaction,
581-
* or if restoring state in a parallel worker.
580+
* As in check_transaction_read_only, allow it if not inside a transaction.
582581
*/
583582
bool
584583
check_transaction_isolation(int*newval,void**extra,GucSourcesource)
585584
{
586585
intnewXactIsoLevel=*newval;
587586

588-
if (newXactIsoLevel!=XactIsoLevel&&
589-
IsTransactionState()&& !InitializingParallelWorker)
587+
if (newXactIsoLevel!=XactIsoLevel&&IsTransactionState())
590588
{
591589
if (FirstSnapshotSet)
592590
{
@@ -621,10 +619,6 @@ check_transaction_isolation(int *newval, void **extra, GucSource source)
621619
bool
622620
check_transaction_deferrable(bool*newval,void**extra,GucSourcesource)
623621
{
624-
/* Just accept the value when restoring state in a parallel worker */
625-
if (InitializingParallelWorker)
626-
return true;
627-
628622
if (IsSubTransaction())
629623
{
630624
GUC_check_errcode(ERRCODE_ACTIVE_SQL_TRANSACTION);

‎src/test/regress/expected/select_parallel.out‎

Lines changed: 0 additions & 18 deletions
Original file line numberDiff line numberDiff line change
@@ -1294,21 +1294,3 @@ SELECT 1 FROM tenk1_vw_sec
12941294
(9 rows)
12951295

12961296
rollback;
1297-
-- test that a newly-created session role propagates to workers.
1298-
begin;
1299-
create role regress_parallel_worker;
1300-
set session authorization regress_parallel_worker;
1301-
select current_setting('session_authorization');
1302-
current_setting
1303-
-------------------------
1304-
regress_parallel_worker
1305-
(1 row)
1306-
1307-
set debug_parallel_query = 1;
1308-
select current_setting('session_authorization');
1309-
current_setting
1310-
-------------------------
1311-
regress_parallel_worker
1312-
(1 row)
1313-
1314-
rollback;

‎src/test/regress/sql/select_parallel.sql‎

Lines changed: 0 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -496,12 +496,3 @@ SELECT 1 FROM tenk1_vw_sec
496496
WHERE (SELECTsum(f1)FROM int4_tblWHERE f1< unique1)<100;
497497

498498
rollback;
499-
500-
-- test that a newly-created session role propagates to workers.
501-
begin;
502-
create role regress_parallel_worker;
503-
set session authorization regress_parallel_worker;
504-
select current_setting('session_authorization');
505-
set debug_parallel_query=1;
506-
select current_setting('session_authorization');
507-
rollback;

0 commit comments

Comments
 (0)
[8]ページ先頭
©2009-2025 Movatter.jp