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Allow MOVE FORWARD n, MOVE BACKWARD n, MOVE FORWARD ALL, MOVE BACKWARD ALL

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in plpgsql.  Clean up a couple of corner cases in the MOVE/FETCH syntax.

Pavel Stehule
This commit is contained in:
Tom Lane
2009-09-29 20:05:29 +00:00
parent 25549edb26
commit 960d7ff022
7 changed files with 178 additions and 23 deletions
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13
doc/src/sgml/plpgsql.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/plpgsql.sgml,v 1.142 2009/06/18 10:22:08 petere Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/plpgsql.sgml,v 1.143 2009/09/29 20:05:29 tgl Exp $ -->
<chapter id="plpgsql">
<title><application>PL/pgSQL</application> - <acronym>SQL</acronym> Procedural Language</title>
@ -2655,16 +2655,18 @@ MOVE <optional> <replaceable>direction</replaceable> { FROM | IN } </optional> <
</para>
<para>
The options for the <replaceable>direction</replaceable> clause are
the same as for <command>FETCH</>, namely
The <replaceable>direction</replaceable> clause can be any of the
variants allowed in the SQL <xref linkend="sql-fetch"
endterm="sql-fetch-title"> command, namely
<literal>NEXT</>,
<literal>PRIOR</>,
<literal>FIRST</>,
<literal>LAST</>,
<literal>ABSOLUTE</> <replaceable>count</replaceable>,
<literal>RELATIVE</> <replaceable>count</replaceable>,
<literal>FORWARD</>, or
<literal>BACKWARD</>.
<literal>ALL</>,
<literal>FORWARD</> <optional> <replaceable>count</replaceable> | <literal>ALL</> </optional>, or
<literal>BACKWARD</> <optional> <replaceable>count</replaceable> | <literal>ALL</> </optional>.
Omitting <replaceable>direction</replaceable> is the same
as specifying <literal>NEXT</>.
<replaceable>direction</replaceable> values that require moving
@ -2678,6 +2680,7 @@ MOVE <optional> <replaceable>direction</replaceable> { FROM | IN } </optional> <
MOVE curs1;
MOVE LAST FROM curs3;
MOVE RELATIVE -2 FROM curs4;
MOVE FORWARD 2 FROM curs4;
</programlisting>
</para>
</sect3>