<!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/allfiles.sgml,v 1.43 2002/07/29 22:14:10 tgl Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/allfiles.sgml,v 1.44 2002/08/04 04:31:44 momjian Exp $
PostgreSQL documentation
Complete list of usable sgml source files in this directory.
-->
<!entity setSessionAuth system "set_session_auth.sgml">
<!entity setTransaction system "set_transaction.sgml">
<!entity show system "show.sgml">
+<!entity startTransaction system "start_transaction.sgml">
<!entity truncate system "truncate.sgml">
<!entity unlisten system "unlisten.sgml">
<!entity update system "update.sgml">
<!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/begin.sgml,v 1.17 2002/04/21 19:02:39 thomas Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/begin.sgml,v 1.18 2002/08/04 04:31:44 momjian Exp $
PostgreSQL documentation
-->
<refsynopsisdivinfo>
<date>1999-07-20</date>
</refsynopsisdivinfo>
- <synopsis>
+ <synopsis>
BEGIN [ WORK | TRANSACTION ]
</synopsis>
-<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ref/set_transaction.sgml,v 1.8 2002/01/20 22:19:57 petere Exp $ -->
+<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ref/set_transaction.sgml,v 1.9 2002/08/04 04:31:44 momjian Exp $ -->
<refentry id="SQL-SET-TRANSACTION">
<docinfo>
<date>2000-11-24</date>
<title>SQL92, SQL99</title>
<para>
- SERIALIZABLE is the default level in <acronym>SQL</acronym>.
- <productname>PostgreSQL</productname> does not provide the
- isolation levels <option>READ UNCOMMITTED</option>
- and <option>REPEATABLE READ</option>. Because
- of multiversion concurrency control, the serializable level is not
+ <option>SERIALIZABLE</option> is the default level in
+ <acronym>SQL</acronym>. <productname>PostgreSQL</productname> does
+ not provide the isolation levels <option>READ UNCOMMITTED</option>
+ and <option>REPEATABLE READ</option>. Because of multiversion
+ concurrency control, the <option>SERIALIZABLE</option> level is not
truly serializable. See the <citetitle>User's Guide</citetitle> for
details.
</para>
<!-- reference.sgml
-$Header: /cvsroot/pgsql/doc/src/sgml/reference.sgml,v 1.32 2002/07/29 22:14:10 tgl Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/reference.sgml,v 1.33 2002/08/04 04:31:44 momjian Exp $
PostgreSQL Reference Manual
-->
&setSessionAuth;
&setTransaction;
&show;
+ &startTransaction;
&truncate;
&unlisten;
&update;
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.198 2002/07/29 22:14:10 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.199 2002/08/04 04:31:44 momjian Exp $
*
*-------------------------------------------------------------------------
*/
TransactionStmt *newnode = makeNode(TransactionStmt);
newnode->command = from->command;
+ Node_Copy(from, newnode, options);
return newnode;
}
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.145 2002/07/29 22:14:10 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.146 2002/08/04 04:31:44 momjian Exp $
*
*-------------------------------------------------------------------------
*/
{
if (a->command != b->command)
return false;
+ if (!equal(a->options, b->options))
+ return false;
return true;
}
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.352 2002/07/31 17:19:51 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.353 2002/08/04 04:31:44 momjian Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
%type <str> opt_id, all_Op, MathOp, opt_name, SpecialRuleRelation
-%type <str> opt_level, opt_encoding
+%type <str> iso_level, opt_encoding
%type <node> grantee
%type <list> grantee_list
%type <ival> privilege
target_list, update_target_list, insert_column_list,
insert_target_list, def_list, opt_indirection,
group_clause, TriggerFuncArgs, select_limit,
- opt_select_limit, opclass_item_list
+ opt_select_limit, opclass_item_list, trans_options
%type <range> into_clause, OptTempTableName
n->args = makeList1($3);
$$ = n;
}
- | TRANSACTION ISOLATION LEVEL opt_level opt_mode
+ | TRANSACTION ISOLATION LEVEL iso_level opt_mode
{
VariableSetStmt *n = makeNode(VariableSetStmt);
n->name = "TRANSACTION ISOLATION LEVEL";
n->args = makeList1(makeStringConst($4, NULL));
$$ = n;
}
- | SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL opt_level
+ | SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL iso_level
{
VariableSetStmt *n = makeNode(VariableSetStmt);
n->name = "default_transaction_isolation";
{ $$ = makeAConst($1); }
;
-opt_level: READ COMMITTED { $$ = "read committed"; }
+iso_level: READ COMMITTED { $$ = "read committed"; }
| SERIALIZABLE { $$ = "serializable"; }
;
{
TransactionStmt *n = makeNode(TransactionStmt);
n->command = ROLLBACK;
+ n->options = NIL;
$$ = (Node *)n;
}
| BEGIN_TRANS opt_trans
{
TransactionStmt *n = makeNode(TransactionStmt);
n->command = BEGIN_TRANS;
+ n->options = NIL;
$$ = (Node *)n;
}
- | COMMIT opt_trans
+ | START TRANSACTION trans_options
{
TransactionStmt *n = makeNode(TransactionStmt);
- n->command = COMMIT;
+ n->command = START;
+ n->options = $3;
$$ = (Node *)n;
}
- | COMMIT opt_trans opt_chain
+ | COMMIT opt_trans
{
TransactionStmt *n = makeNode(TransactionStmt);
n->command = COMMIT;
+ n->options = NIL;
$$ = (Node *)n;
}
| END_TRANS opt_trans
{
TransactionStmt *n = makeNode(TransactionStmt);
n->command = COMMIT;
+ n->options = NIL;
$$ = (Node *)n;
}
| ROLLBACK opt_trans
{
TransactionStmt *n = makeNode(TransactionStmt);
n->command = ROLLBACK;
- $$ = (Node *)n;
- }
- | ROLLBACK opt_trans opt_chain
- {
- TransactionStmt *n = makeNode(TransactionStmt);
- n->command = ROLLBACK;
+ n->options = NIL;
$$ = (Node *)n;
}
;
+trans_options: ISOLATION LEVEL iso_level
+ { $$ = makeList1(makeStringConst($3, NULL)); }
+ | /* EMPTY */ { $$ = NIL; }
+ ;
+
opt_trans: WORK {}
| TRANSACTION {}
| /*EMPTY*/ {}
;
-opt_chain: AND NO CHAIN {}
- | AND CHAIN
- {
- /* SQL99 asks that conforming dbs reject AND CHAIN
- * if they don't support it. So we can't just ignore it.
- * - thomas 2000-08-06
- */
- elog(ERROR, "COMMIT/AND CHAIN not yet supported");
- }
- ;
-
-
/*****************************************************************************
*
* QUERY:
- * define view <viewname> '('target-list ')' [where <quals> ]
+ * create view <viewname> '('target-list ')' AS <query>
*
*****************************************************************************/
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.276 2002/07/30 16:55:45 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.277 2002/08/04 04:31:44 momjian Exp $
*
* NOTES
* this is the "main" module of the postgres backend and
if (!IsUnderPostmaster)
{
puts("\nPOSTGRES backend interactive interface ");
- puts("$Revision: 1.276 $ $Date: 2002/07/30 16:55:45 $\n");
+ puts("$Revision: 1.277 $ $Date: 2002/08/04 04:31:44 $\n");
}
/*
tag = "BEGIN";
break;
+ case START:
+ tag = "START TRANSACTION";
+ break;
+
case COMMIT:
tag = "COMMIT";
break;
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/tcop/utility.c,v 1.167 2002/07/30 16:55:45 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/backend/tcop/utility.c,v 1.168 2002/08/04 04:31:44 momjian Exp $
*
*-------------------------------------------------------------------------
*/
BeginTransactionBlock();
break;
+ /*
+ * START TRANSACTION, as defined by SQL99: Identical to BEGIN,
+ * except that it takes a few additional options.
+ */
+ case START:
+ {
+ BeginTransactionBlock();
+
+ /*
+ * Currently, the only option that can be set is
+ * the transaction isolation level by START
+ * TRANSACTION.
+ */
+ if (stmt->options)
+ {
+ SetPGVariable("TRANSACTION ISOLATION LEVEL",
+ stmt->options,
+ false);
+ }
+ }
+ break;
+
case COMMIT:
EndTransactionBlock();
break;
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Id: parsenodes.h,v 1.196 2002/07/30 16:55:45 momjian Exp $
+ * $Id: parsenodes.h,v 1.197 2002/08/04 04:31:44 momjian Exp $
*
*-------------------------------------------------------------------------
*/
} UnlistenStmt;
/* ----------------------
- * {Begin|Abort|End} Transaction Statement
+ * {Begin|Commit|Rollback} Transaction Statement
* ----------------------
*/
typedef struct TransactionStmt
{
NodeTag type;
- int command; /* BEGIN|END|ABORT */
+ int command; /* BEGIN_TRANS|START|COMMIT|ROLLBACK */
+ List *options;
} TransactionStmt;
/* ----------------------
projects / thirdparty / postgresql.git / commitdiff
