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2c0ef9777c
bits indicating which optional capabilities can actually be exercised at runtime. This will allow Sort and Material nodes, and perhaps later other nodes, to avoid unnecessary overhead in common cases. This commit just adds the infrastructure and arranges to pass the correct flag values down to plan nodes; none of the actual optimizations are here yet. I'm committing this separately in case anyone wants to measure the added overhead. (It should be negligible.) Simon Riggs and Tom Lane
30 lines
920 B
C
30 lines
920 B
C
/*-------------------------------------------------------------------------
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*
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* nodeAgg.h
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* prototypes for nodeAgg.c
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*
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*
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/executor/nodeAgg.h,v 1.25 2006/02/28 04:10:28 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef NODEAGG_H
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#define NODEAGG_H
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#include "fmgr.h"
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#include "nodes/execnodes.h"
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extern int ExecCountSlotsAgg(Agg *node);
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extern AggState *ExecInitAgg(Agg *node, EState *estate, int eflags);
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extern TupleTableSlot *ExecAgg(AggState *node);
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extern void ExecEndAgg(AggState *node);
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extern void ExecReScanAgg(AggState *node, ExprContext *exprCtxt);
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extern Size hash_agg_entry_size(int numAggs);
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extern Datum aggregate_dummy(PG_FUNCTION_ARGS);
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#endif /* NODEAGG_H */
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