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Add SHARE UPDATE EXCLUSIVE lock mode, coming soon to a VACUUM near you.

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Name chosen per pghackers discussion around 6/22/01.
This commit is contained in:
Tom Lane
2001-07-09 22:18:34 +00:00
parent 8902f49abb
commit 4fe42dfbc3
8 changed files with 143 additions and 80 deletions
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44
src/backend/storage/lmgr/lmgr.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/lmgr.c,v 1.48 2001/06/22 00:04:59 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/lmgr.c,v 1.49 2001/07/09 22:18:33 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -33,25 +33,35 @@ static LOCKMASK LockConflicts[] = {
(1 << ExclusiveLock) | (1 << AccessExclusiveLock),
/* RowExclusiveLock */
(1 << ExclusiveLock) | (1 << ShareRowExclusiveLock) | (1 << ShareLock) |
(1 << AccessExclusiveLock),
(1 << ShareLock) | (1 << ShareRowExclusiveLock) |
(1 << ExclusiveLock) | (1 << AccessExclusiveLock),
/* ShareUpdateExclusiveLock */
(1 << ShareUpdateExclusiveLock) |
(1 << ShareLock) | (1 << ShareRowExclusiveLock) |
(1 << ExclusiveLock) | (1 << AccessExclusiveLock),
/* ShareLock */
(1 << ExclusiveLock) | (1 << ShareRowExclusiveLock) |
(1 << RowExclusiveLock) | (1 << AccessExclusiveLock),
(1 << RowExclusiveLock) | (1 << ShareUpdateExclusiveLock) |
(1 << ShareRowExclusiveLock) |
(1 << ExclusiveLock) | (1 << AccessExclusiveLock),
/* ShareRowExclusiveLock */
(1 << ExclusiveLock) | (1 << ShareRowExclusiveLock) |
(1 << ShareLock) | (1 << RowExclusiveLock) | (1 << AccessExclusiveLock),
(1 << RowExclusiveLock) | (1 << ShareUpdateExclusiveLock) |
(1 << ShareLock) | (1 << ShareRowExclusiveLock) |
(1 << ExclusiveLock) | (1 << AccessExclusiveLock),
/* ExclusiveLock */
(1 << ExclusiveLock) | (1 << ShareRowExclusiveLock) | (1 << ShareLock) |
(1 << RowExclusiveLock) | (1 << RowShareLock) | (1 << AccessExclusiveLock),
(1 << RowShareLock) |
(1 << RowExclusiveLock) | (1 << ShareUpdateExclusiveLock) |
(1 << ShareLock) | (1 << ShareRowExclusiveLock) |
(1 << ExclusiveLock) | (1 << AccessExclusiveLock),
/* AccessExclusiveLock */
(1 << ExclusiveLock) | (1 << ShareRowExclusiveLock) | (1 << ShareLock) |
(1 << RowExclusiveLock) | (1 << RowShareLock) |
(1 << AccessExclusiveLock) | (1 << AccessShareLock)
(1 << AccessShareLock) | (1 << RowShareLock) |
(1 << RowExclusiveLock) | (1 << ShareUpdateExclusiveLock) |
(1 << ShareLock) | (1 << ShareRowExclusiveLock) |
(1 << ExclusiveLock) | (1 << AccessExclusiveLock)
};
@@ -63,14 +73,16 @@ static int LockPrios[] = {
2,
/* RowExclusiveLock */
3,
/* ShareLock */
/* ShareUpdateExclusiveLock */
4,
/* ShareRowExclusiveLock */
/* ShareLock */
5,
/* ExclusiveLock */
/* ShareRowExclusiveLock */
6,
/* ExclusiveLock */
7,
/* AccessExclusiveLock */
7
8
};
LOCKMETHOD LockTableId = (LOCKMETHOD) NULL;