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Code review for NOWAIT patch: downgrade NOWAIT from fully reserved keyword

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to unreserved keyword, use ereport not elog, assign a separate error code
for 'could not obtain lock' so that applications will be able to detect
that case cleanly.
This commit is contained in:
Tom Lane
2004-10-01 16:40:05 +00:00
parent 392b187a21
commit 4c5e810fcd
6 changed files with 29 additions and 9 deletions
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7
doc/src/sgml/errcodes.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/errcodes.sgml,v 1.8 2004/08/24 00:06:50 neilc Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/errcodes.sgml,v 1.9 2004/10/01 16:39:46 tgl Exp $ -->
<appendix id="errcodes-appendix">
<title><productname>PostgreSQL</productname> Error Codes</title>
@ -1099,6 +1099,11 @@
<entry>CANT CHANGE RUNTIME PARAM</entry>
</row>
<row>
<entry><literal>55P03</literal></entry>
<entry>LOCK NOT AVAILABLE</entry>
</row>
<row>
<entry>Class 57</entry>

4
doc/src/sgml/ref/lock.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/lock.sgml,v 1.42 2004/03/12 00:52:23 neilc Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/lock.sgml,v 1.43 2004/10/01 16:39:47 tgl Exp $
PostgreSQL documentation
-->
@ -37,7 +37,7 @@ where <replaceable class="PARAMETER">lockmode</replaceable> is one of:
if necessary for any conflicting locks to be released. If
<literal>NOWAIT</literal> is specified, <command>LOCK
TABLE</command> does not wait to acquire the desired lock: if it
cannot be immediately acquired, the transaction is aborted and an
cannot be acquired immediately, the command is aborted and an
error is emitted. 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