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Implement isolation levels read uncommitted and repeatable read as acting

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like the next higher one.
This commit is contained in:
Peter Eisentraut
2003-11-06 22:08:15 +00:00
parent 144a2ecd57
commit 96889392e9
15 changed files with 156 additions and 69 deletions
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6
src/backend/catalog/sql_features.txt
View File

@ -156,10 +156,10 @@ F051 Basic date and time 07 LOCALTIME YES
F051 Basic date and time 08 LOCALTIMESTAMP YES
F052 Intervals and datetime arithmetic YES
F081 UNION and EXCEPT in views YES
F111 Isolation levels other than SERIALIZABLE NO
F111 Isolation levels other than SERIALIZABLE 01 READ UNCOMMITTED isolation level NO
F111 Isolation levels other than SERIALIZABLE YES
F111 Isolation levels other than SERIALIZABLE 01 READ UNCOMMITTED isolation level YES behaves like READ COMMITTED
F111 Isolation levels other than SERIALIZABLE 02 READ COMMITTED isolation level YES
F111 Isolation levels other than SERIALIZABLE 03 REPEATABLE READ isolation level NO
F111 Isolation levels other than SERIALIZABLE 03 REPEATABLE READ isolation level YES behaves like SERIALIZABLE
F121 Basic diagnostics management NO
F121 Basic diagnostics management 01 GET DIAGNOSTICS statement NO
F121 Basic diagnostics management 02 SET TRANSACTION statement: DIAGNOSTICS SIZE clause NO

4
src/backend/commands/trigger.c
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/trigger.c,v 1.159 2003/10/02 06:34:03 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/trigger.c,v 1.160 2003/11/06 22:08:14 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -1576,7 +1576,7 @@ ltrmark:;
case HeapTupleUpdated:
ReleaseBuffer(buffer);
if (XactIsoLevel == XACT_SERIALIZABLE)
if (IsXactIsoLevelSerializable)
ereport(ERROR,
(errcode(ERRCODE_T_R_SERIALIZATION_FAILURE),
errmsg("could not serialize access due to concurrent update")));

29
src/backend/commands/variable.c
View File

@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/variable.c,v 1.88 2003/09/25 06:57:59 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/variable.c,v 1.89 2003/11/06 22:08:14 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -640,11 +640,21 @@ assign_XactIsoLevel(const char *value, bool doit, bool interactive)
if (doit)
XactIsoLevel = XACT_SERIALIZABLE;
}
else if (strcmp(value, "repeatable read") == 0)
{
if (doit)
XactIsoLevel = XACT_REPEATABLE_READ;
}
else if (strcmp(value, "read committed") == 0)
{
if (doit)
XactIsoLevel = XACT_READ_COMMITTED;
}
else if (strcmp(value, "read uncommitted") == 0)
{
if (doit)
XactIsoLevel = XACT_READ_UNCOMMITTED;
}
else if (strcmp(value, "default") == 0)
{
if (doit)
@ -659,10 +669,19 @@ assign_XactIsoLevel(const char *value, bool doit, bool interactive)
const char *
show_XactIsoLevel(void)
{
if (XactIsoLevel == XACT_SERIALIZABLE)
return "serializable";
else
return "read committed";
switch (XactIsoLevel)
{
case XACT_READ_UNCOMMITTED:
return "read uncommitted";
case XACT_READ_COMMITTED:
return "read committed";
case XACT_REPEATABLE_READ:
return "repeatable read";
case XACT_SERIALIZABLE:
return "serializable";
default:
return "bogus";
}
}

8
src/backend/executor/execMain.c
View File

@ -26,7 +26,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.220 2003/10/01 21:30:52 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.221 2003/11/06 22:08:14 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -1139,7 +1139,7 @@ lnext: ;
break;
case HeapTupleUpdated:
if (XactIsoLevel == XACT_SERIALIZABLE)
if (IsXactIsoLevelSerializable)
ereport(ERROR,
(errcode(ERRCODE_T_R_SERIALIZATION_FAILURE),
errmsg("could not serialize access due to concurrent update")));
@ -1440,7 +1440,7 @@ ldelete:;
break;
case HeapTupleUpdated:
if (XactIsoLevel == XACT_SERIALIZABLE)
if (IsXactIsoLevelSerializable)
ereport(ERROR,
(errcode(ERRCODE_T_R_SERIALIZATION_FAILURE),
errmsg("could not serialize access due to concurrent update")));
@ -1576,7 +1576,7 @@ lreplace:;
break;
case HeapTupleUpdated:
if (XactIsoLevel == XACT_SERIALIZABLE)
if (IsXactIsoLevelSerializable)
ereport(ERROR,
(errcode(ERRCODE_T_R_SERIALIZATION_FAILURE),
errmsg("could not serialize access due to concurrent update")));

14
src/backend/parser/gram.y
View File

@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.436 2003/10/02 06:34:04 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.437 2003/11/06 22:08:14 petere Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -342,7 +342,7 @@ static void doNegateFloat(Value *v);
DATABASE DAY_P DEALLOCATE DEC DECIMAL_P DECLARE DEFAULT DEFAULTS
DEFERRABLE DEFERRED DEFINER DELETE_P DELIMITER DELIMITERS
DESC DISTINCT DO DOMAIN_P DOUBLE_P DROP
DESC DISTINCT DO DOMAIN_P DOUBLE_P DROP
EACH ELSE ENCODING ENCRYPTED END_P ESCAPE EXCEPT EXCLUDING
EXCLUSIVE EXECUTE EXISTS EXPLAIN EXTERNAL EXTRACT
@ -380,7 +380,7 @@ static void doNegateFloat(Value *v);
PRECISION PRESERVE PREPARE PRIMARY
PRIOR PRIVILEGES PROCEDURAL PROCEDURE
READ REAL RECHECK REFERENCES REINDEX RELATIVE_P RENAME REPLACE
READ REAL RECHECK REFERENCES REINDEX RELATIVE_P RENAME REPEATABLE REPLACE
RESET RESTART RESTRICT RETURNS REVOKE RIGHT ROLLBACK ROW ROWS
RULE
@ -393,7 +393,7 @@ static void doNegateFloat(Value *v);
TO TOAST TRAILING TRANSACTION TREAT TRIGGER TRIM TRUE_P
TRUNCATE TRUSTED TYPE_P
UNENCRYPTED UNION UNIQUE UNKNOWN UNLISTEN UNTIL
UNCOMMITTED UNENCRYPTED UNION UNIQUE UNKNOWN UNLISTEN UNTIL
UPDATE USAGE USER USING
VACUUM VALID VALIDATOR VALUES VARCHAR VARYING
@ -922,7 +922,9 @@ var_value: opt_boolean
{ $$ = makeAConst($1); }
;
iso_level: READ COMMITTED { $$ = "read committed"; }
iso_level: READ UNCOMMITTED { $$ = "read uncommitted"; }
| READ COMMITTED { $$ = "read committed"; }
| REPEATABLE READ { $$ = "repeatable read"; }
| SERIALIZABLE { $$ = "serializable"; }
;
@ -7407,6 +7409,7 @@ unreserved_keyword:
| REINDEX
| RELATIVE_P
| RENAME
| REPEATABLE
| REPLACE
| RESET
| RESTART
@ -7445,6 +7448,7 @@ unreserved_keyword:
| TRUNCATE
| TRUSTED
| TYPE_P
| UNCOMMITTED
| UNENCRYPTED
| UNKNOWN
| UNLISTEN

4
src/backend/parser/keywords.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.141 2003/08/04 02:40:01 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.142 2003/11/06 22:08:15 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -251,6 +251,7 @@ static const ScanKeyword ScanKeywords[] = {
{"reindex", REINDEX},
{"relative", RELATIVE_P},
{"rename", RENAME},
{"repeatable", REPEATABLE},
{"replace", REPLACE},
{"reset", RESET},
{"restart", RESTART},
@ -307,6 +308,7 @@ static const ScanKeyword ScanKeywords[] = {
{"truncate", TRUNCATE},
{"trusted", TRUSTED},
{"type", TYPE_P},
{"uncommitted", UNCOMMITTED},
{"unencrypted", UNENCRYPTED},
{"union", UNION},
{"unique", UNIQUE},

4
src/backend/utils/adt/ri_triggers.c
View File

@ -17,7 +17,7 @@
*
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/backend/utils/adt/ri_triggers.c,v 1.63 2003/10/31 03:58:20 wieck Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/ri_triggers.c,v 1.64 2003/11/06 22:08:15 petere Exp $
*
* ----------
*/
@ -3073,7 +3073,7 @@ ri_PerformCheck(RI_QueryKey *qkey, void *qplan,
* rows under current snapshot that wouldn't be visible per the
* transaction snapshot).
*/
if (XactIsoLevel == XACT_SERIALIZABLE)
if (IsXactIsoLevelSerializable)
{
useCurrentSnapshot = detectNewRows;
}

14
src/backend/utils/misc/guc.c
View File

@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/misc/guc.c,v 1.164 2003/10/18 22:59:09 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/misc/guc.c,v 1.165 2003/11/06 22:08:15 petere Exp $
*
*--------------------------------------------------------------------
*/
@ -1346,7 +1346,7 @@ static struct config_string ConfigureNamesString[] =
{"default_transaction_isolation", PGC_USERSET, CLIENT_CONN_STATEMENT,
gettext_noop("Sets the transaction isolation level of each new transaction."),
gettext_noop("Each SQL transaction has an isolation level, which "
"can be either \"read committed\" or \"serializable\".")
"can be either \"read uncommitted\", \"read committed\", \"repeatable read\", or \"serializable\".")
},
&default_iso_level_string,
"read committed", assign_defaultxactisolevel, NULL
@ -4238,11 +4238,21 @@ assign_defaultxactisolevel(const char *newval, bool doit, bool interactive)
if (doit)
DefaultXactIsoLevel = XACT_SERIALIZABLE;
}
else if (strcasecmp(newval, "repeatable read") == 0)
{
if (doit)
DefaultXactIsoLevel = XACT_REPEATABLE_READ;
}
else if (strcasecmp(newval, "read committed") == 0)
{
if (doit)
DefaultXactIsoLevel = XACT_READ_COMMITTED;
}
else if (strcasecmp(newval, "read uncommitted") == 0)
{
if (doit)
DefaultXactIsoLevel = XACT_READ_UNCOMMITTED;
}
else
return NULL;
return newval;

4
src/backend/utils/time/tqual.c
View File

@ -16,7 +16,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/time/tqual.c,v 1.70 2003/10/01 21:30:52 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/time/tqual.c,v 1.71 2003/11/06 22:08:15 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -984,7 +984,7 @@ SetQuerySnapshot(void)
return;
}
if (XactIsoLevel == XACT_SERIALIZABLE)
if (IsXactIsoLevelSerializable)
QuerySnapshot = SerializableSnapshot;
else
QuerySnapshot = GetSnapshotData(&QuerySnapshotData, false);