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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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22
src/backend/parser/gram.y
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@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.233 2001/06/30 22:03:25 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.234 2001/07/09 22:18:33 tgl Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -153,7 +153,7 @@ static void doNegateFloat(Value *v);
%type <list> createdb_opt_list, createdb_opt_item
%type <ival> opt_lock, lock_type
%type <boolean> opt_lmode, opt_force
%type <boolean> opt_force
%type <ival> user_createdb_clause, user_createuser_clause
%type <str> user_passwd_clause
@@ -3277,18 +3277,18 @@ LockStmt: LOCK_P opt_table relation_name opt_lock
}
;
opt_lock: IN lock_type MODE { $$ = $2; }
opt_lock: IN lock_type MODE { $$ = $2; }
| /*EMPTY*/ { $$ = AccessExclusiveLock; }
;
lock_type: SHARE ROW EXCLUSIVE { $$ = ShareRowExclusiveLock; }
| ROW opt_lmode { $$ = ($2? RowShareLock: RowExclusiveLock); }
| ACCESS opt_lmode { $$ = ($2? AccessShareLock: AccessExclusiveLock); }
| opt_lmode { $$ = ($1? ShareLock: ExclusiveLock); }
;
opt_lmode: SHARE { $$ = TRUE; }
| EXCLUSIVE { $$ = FALSE; }
lock_type: ACCESS SHARE { $$ = AccessShareLock; }
| ROW SHARE { $$ = RowShareLock; }
| ROW EXCLUSIVE { $$ = RowExclusiveLock; }
| SHARE UPDATE EXCLUSIVE { $$ = ShareUpdateExclusiveLock; }
| SHARE { $$ = ShareLock; }
| SHARE ROW EXCLUSIVE { $$ = ShareRowExclusiveLock; }
| EXCLUSIVE { $$ = ExclusiveLock; }
| ACCESS EXCLUSIVE { $$ = AccessExclusiveLock; }
;

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;

3
src/backend/storage/lmgr/lock.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/lock.c,v 1.90 2001/06/27 23:31:39 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/lock.c,v 1.91 2001/07/09 22:18:33 tgl Exp $
*
* NOTES
* Outside modules can create a lock table and acquire/release
@@ -58,6 +58,7 @@ static char *lock_mode_names[] =
"AccessShareLock",
"RowShareLock",
"RowExclusiveLock",
"ShareUpdateExclusiveLock",
"ShareLock",
"ShareRowExclusiveLock",
"ExclusiveLock",