Hi ~ We have interface RelHintsPropagator for hints propagation customization, but you may need to modify the code of the rule a little bit.
Best, Danny Chan Taras Ledkov <[email protected]> 于2021年5月26日周三 下午7:26写道： > Hi, > > I am trying to figure out how to use hints correctly. > > My case: > I've registered hint for Aggregate node to force expand DISTINCT aggregate. > Because is some cases plan with DISTINCT aggregate to JOIN cannot be > chosen by the cost. > > I see that different rules treat hints differently. > e.g.: > - AggregateExpandDistinctAggregatesRule - copy hints of the source node > for new aggregate nodes. > - AggregateReduceFunctionsRule - create new node and looses the original > hints. > > Is is correct behavior and am I missing something at the hints/planner > logic? > > -- > Taras Ledkov > Mail-To: [email protected] > >
