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Support SET FROM CURRENT in CREATE/ALTER FUNCTION, ALTER DATABASE, ALTER ROLE.

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(Actually, it works as a plain statement too, but I didn't document that
because it seems a bit useless.)  Unify VariableResetStmt with
VariableSetStmt, and clean up some ancient cruft in the representation of
same.
This commit is contained in:
Tom Lane
2007-09-03 18:46:30 +00:00
parent dd4594e332
commit e7889b83b7
17 changed files with 382 additions and 360 deletions
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14
doc/src/sgml/ref/alter_function.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/alter_function.sgml,v 1.14 2007/09/03 00:39:12 tgl Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/alter_function.sgml,v 1.15 2007/09/03 18:46:29 tgl Exp $
PostgreSQL documentation
-->
@ -21,7 +21,7 @@ PostgreSQL documentation
<refsynopsisdiv>
<synopsis>
ALTER FUNCTION <replaceable>name</replaceable> ( [ [ <replaceable class="parameter">argmode</replaceable> ] [ <replaceable class="parameter">argname</replaceable> ] <replaceable class="parameter">argtype</replaceable> [, ...] ] )
<replaceable class="PARAMETER">action</replaceable> [, ... ] [ RESTRICT ]
<replaceable class="PARAMETER">action</replaceable> [ ... ] [ RESTRICT ]
ALTER FUNCTION <replaceable>name</replaceable> ( [ [ <replaceable class="parameter">argmode</replaceable> ] [ <replaceable class="parameter">argname</replaceable> ] <replaceable class="parameter">argtype</replaceable> [, ...] ] )
RENAME TO <replaceable>new_name</replaceable>
ALTER FUNCTION <replaceable>name</replaceable> ( [ [ <replaceable class="parameter">argmode</replaceable> ] [ <replaceable class="parameter">argname</replaceable> ] <replaceable class="parameter">argtype</replaceable> [, ...] ] )
@ -36,8 +36,10 @@ where <replaceable class="PARAMETER">action</replaceable> is one of:
[ EXTERNAL ] SECURITY INVOKER | [ EXTERNAL ] SECURITY DEFINER
COST <replaceable class="parameter">execution_cost</replaceable>
ROWS <replaceable class="parameter">result_rows</replaceable>
SET <replaceable class="parameter">parameter</replaceable> { TO | = } { <replaceable class="parameter">value</replaceable> | DEFAULT }
RESET <replaceable class="parameter">parameter</replaceable>
SET <replaceable class="parameter">configuration_parameter</replaceable> { TO | = } { <replaceable class="parameter">value</replaceable> | DEFAULT }
SET <replaceable class="parameter">configuration_parameter</replaceable> FROM CURRENT
RESET <replaceable class="parameter">configuration_parameter</replaceable>
RESET ALL
</synopsis>
</refsynopsisdiv>
@ -215,7 +217,7 @@ where <replaceable class="PARAMETER">action</replaceable> is one of:
</varlistentry>
<varlistentry>
<term><replaceable>parameter</replaceable></term>
<term><replaceable>configuration_parameter</replaceable></term>
<term><replaceable>value</replaceable></term>
<listitem>
<para>
@ -226,6 +228,8 @@ where <replaceable class="PARAMETER">action</replaceable> is one of:
setting is removed, so that the function executes with the value
present in its environment. Use <literal>RESET
ALL</literal> to clear all function-local settings.
<literal>SET FROM CURRENT</> saves the session's current value of
the parameter as the value to be applied when the function is entered.
</para>
<para>