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Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/config.sgml | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index 0d61dcb1798..4d899e3b244 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -3821,6 +3821,26 @@ ANY <replaceable class="parameter">num_sync</replaceable> ( <replaceable class=" </listitem> </varlistentry> + <varlistentry id="guc-enable-partitionwise-aggregate" xreflabel="enable_partitionwise_aggregate"> + <term><varname>enable_partitionwise_aggregate</varname> (<type>boolean</type>) + <indexterm> + <primary><varname>enable_partitionwise_aggregate</varname> configuration parameter</primary> + </indexterm> + </term> + <listitem> + <para> + Enables or disables the query planner's use of partitionwise grouping + or aggregation, which allows grouping or aggregation on a partitioned + tables performed separately for each partition. If the <literal>GROUP + BY</literal> clause does not include the partition keys, only partial + aggregation can be performed on a per-partition basis, and + finalization must be performed later. Because partitionwise grouping + or aggregation can use significantly more CPU time and memory during + planning, the default is <literal>off</literal>. + </para> + </listitem> + </varlistentry> + <varlistentry id="guc-enable-seqscan" xreflabel="enable_seqscan"> <term><varname>enable_seqscan</varname> (<type>boolean</type>) <indexterm> |