> > Controls if the query planner will produce a plan which will provide > <literal>GROUP BY</literal> keys presorted 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 reordered 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 on. > A correction of myself: presorted -> sorted, reordered ->sorted
Regards, Pavel
