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Allow BEGIN WORK to specify transaction isolation level, like START

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TRANSACTION.
This commit is contained in:
Bruce Momjian 2004-01-10 02:21:08 +00:00
parent e439fef6fc
commit a620a760ed
4 changed files with 41 additions and 11 deletions
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17
doc/src/sgml/ref/begin.sgml
View File

@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/begin.sgml,v 1.27 2003/11/29 19:51:38 pgsql Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/begin.sgml,v 1.28 2004/01/10 02:21:08 momjian Exp $
PostgreSQL documentation
-->
@ -21,6 +21,8 @@ PostgreSQL documentation
<refsynopsisdiv>
<synopsis>
BEGIN [ WORK | TRANSACTION ]
[ ISOLATION LEVEL { READ UNCOMMITTED | READ COMMITTED | REPEATABLE READ | SERIALIZABLE } ]
[ READ WRITE | READ ONLY ]
</synopsis>
</refsynopsisdiv>
@ -49,6 +51,13 @@ BEGIN [ WORK | TRANSACTION ]
other sessions will be unable to see the intermediate states
wherein not all the related updates have been done.
</para>
<para>
If the isolation level or read/write mode is specified, the new
transaction has those characteristics, as if
<xref linkend="sql-set-transaction" endterm="sql-set-transaction-title">
was executed.
</para>
</refsect1>
<refsect1>
@ -65,6 +74,12 @@ BEGIN [ WORK | TRANSACTION ]
</listitem>
</varlistentry>
</variablelist>
<para>
See under <xref linkend="sql-set-transaction"
endterm="sql-set-transaction-title"> about the meaning of the
other parameters.
</para>
</refsect1>
<refsect1>

7
doc/src/sgml/ref/start_transaction.sgml
View File

@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/start_transaction.sgml,v 1.9 2003/11/29 19:51:39 pgsql Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/start_transaction.sgml,v 1.10 2004/01/10 02:21:08 momjian Exp $
PostgreSQL documentation
-->
@ -33,9 +33,8 @@ START TRANSACTION
This command begins a new transaction. If the isolation level or
read/write mode is specified, the new transaction has those
characteristics, as if <xref linkend="sql-set-transaction"
endterm="sql-set-transaction-title"> was executed. In all other
respects, the behavior of this command is identical to the <xref
linkend="sql-begin" endterm="sql-begin-title"> command.
endterm="sql-set-transaction-title"> was executed. It is the same
as the <xref linkend="sql-begin" endterm="sql-begin-title"> command.
</para>
</refsect1>

6
src/backend/parser/gram.y
View File

@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.443 2004/01/07 18:56:27 neilc Exp $
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.444 2004/01/10 02:21:08 momjian Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -3674,11 +3674,11 @@ TransactionStmt:
n->options = NIL;
$$ = (Node *)n;
}
| BEGIN_P opt_transaction
| BEGIN_P opt_transaction transaction_mode_list_or_empty
{
TransactionStmt *n = makeNode(TransactionStmt);
n->kind = TRANS_STMT_BEGIN;
n->options = NIL;
n->options = $3;
$$ = (Node *)n;
}
| START TRANSACTION transaction_mode_list_or_empty

22
src/bin/psql/tab-complete.c
View File

@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2003, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/tab-complete.c,v 1.97 2003/12/01 22:21:54 momjian Exp $
* $PostgreSQL: pgsql/src/bin/psql/tab-complete.c,v 1.98 2004/01/10 02:21:08 momjian Exp $
*/
/*----------------------------------------------------------------------
@ -723,6 +723,18 @@ psql_completion(char *text, int start, int end)
else if (strcasecmp(prev2_wd, "ANALYZE") == 0)
COMPLETE_WITH_CONST(";");
/* BEGIN, COMMIT, ROLLBACK, ABORT, */
else if (strcasecmp(prev_wd, "BEGIN") == 0 ||
strcasecmp(prev_wd, "END") == 0 ||
strcasecmp(prev_wd, "COMMIT") == 0 ||
strcasecmp(prev_wd, "ROLLBACK") == 0 ||
strcasecmp(prev_wd, "ABORT") == 0)
{
static const char * const list_TRANS[] =
{"WORK", "TRANSACTION", NULL};
COMPLETE_WITH_LIST(list_TRANS);
}
/* CLUSTER */
/* If the previous word is CLUSTER, produce list of indexes. */
else if (strcasecmp(prev_wd, "CLUSTER") == 0)
@ -1099,10 +1111,14 @@ psql_completion(char *text, int start, int end)
strcasecmp(prev_wd, "SHOW") == 0)
COMPLETE_WITH_LIST(pgsql_variables);
/* Complete "SET TRANSACTION" */
else if ((strcasecmp(prev2_wd, "SET") == 0
&& strcasecmp(prev_wd, "TRANSACTION") == 0)
else if ((strcasecmp(prev2_wd, "SET") == 0 &&
strcasecmp(prev_wd, "TRANSACTION") == 0)
|| (strcasecmp(prev2_wd, "START") == 0
&& strcasecmp(prev_wd, "TRANSACTION") == 0)
|| (strcasecmp(prev2_wd, "BEGIN") == 0
&& strcasecmp(prev_wd, "WORK") == 0)
|| (strcasecmp(prev2_wd, "BEGIN") == 0
&& strcasecmp(prev_wd, "TRANSACTION") == 0)
|| (strcasecmp(prev4_wd, "SESSION") == 0
&& strcasecmp(prev3_wd, "CHARACTERISTICS") == 0
&& strcasecmp(prev2_wd, "AS") == 0