Function advance_aggregates

src/backend/executor/nodeAgg.c:855–863

* Advance each aggregate transition state for one input tuple. The input * tuple has been stored in tmpcontext->ecxt_outertuple, so that it is * accessible to ExecEvalExpr. * * We have two sets of transition states to handle: one for sorted aggregation * and one for hashed; we do them both here, to avoid multiple evaluation of * the inputs. * * When called, CurrentMemoryContext should be

 * When called, CurrentMemoryContext should be the per-query context.
 */
static void
advance_aggregates(AggState *aggstate)
{
	bool		dummynull;

	ExecEvalExprSwitchContext(aggstate->phase->evaltrans,
							  aggstate->tmpcontext,
							  &dummynull);
}

/*
 * Run the transition function for a DISTINCT or ORDER BY aggregate