diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/config.sgml | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index 698169afdb6..0c7a9082c54 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -5341,6 +5341,25 @@ ANY <replaceable class="parameter">num_sync</replaceable> ( <replaceable class=" </listitem> </varlistentry> + <varlistentry id="guc-enable-groupby-reordering" xreflabel="enable_group_by_reordering"> + <term><varname>enable_group_by_reordering</varname> (<type>boolean</type>) + <indexterm> + <primary><varname>enable_group_by_reordering</varname> configuration parameter</primary> + </indexterm> + </term> + <listitem> + <para> + Controls if the query planner will produce a plan which will provide + <literal>GROUP BY</literal> keys sorted in the order of keys of + a child node of the plan, such as an index scan. When disabled, the + query planner will produce a plan with <literal>GROUP BY</literal> + keys only sorted to match the <literal>ORDER BY</literal> clause, + if any. When enabled, the planner will try to produce a more + efficient plan. The default value is <literal>on</literal>. + </para> + </listitem> + </varlistentry> + <varlistentry id="guc-enable-hashagg" xreflabel="enable_hashagg"> <term><varname>enable_hashagg</varname> (<type>boolean</type>) <indexterm> |