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Add NOWAIT option to LOCK command

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This commit is contained in:
Tatsuo Ishii
2004-03-11 01:47:41 +00:00
parent 60a068b389
commit 0b86ade1c2
9 changed files with 56 additions and 15 deletions
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10
doc/src/sgml/ref/lock.sgml
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@@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/lock.sgml,v 1.40 2003/12/14 00:05:29 neilc Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/lock.sgml,v 1.41 2004/03/11 01:47:35 ishii Exp $
PostgreSQL documentation
-->
@@ -20,7 +20,7 @@ PostgreSQL documentation
<refsynopsisdiv>
<synopsis>
LOCK [ TABLE ] <replaceable class="PARAMETER">name</replaceable> [, ...] [ IN <replaceable class="PARAMETER">lockmode</replaceable> MODE ]
LOCK [ TABLE ] <replaceable class="PARAMETER">name</replaceable> [, ...] [ IN <replaceable class="PARAMETER">lockmode</replaceable> MODE ] [ NOWAIT ]
where <replaceable class="PARAMETER">lockmode</replaceable> is one of:
@@ -34,8 +34,10 @@ where <replaceable class="PARAMETER">lockmode</replaceable> is one of:
<para>
<command>LOCK TABLE</command> obtains a table-level lock, waiting if
necessary for any conflicting locks to be released. Once obtained,
the lock is held for the remainder of the current transaction.
necessary for any conflicting locks to be released.
If <literal>NOWAIT</literal> is given, <command>LOCK TABLE</command>
does not wait for acquiring lock, and throws an error instead.
Once obtained, the lock is held for the remainder of the current transaction.
(There is no <command>UNLOCK TABLE</command> command; locks are always
released at transaction end.)
</para>