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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
28 lines
968 B
C
28 lines
968 B
C
/*-------------------------------------------------------------------------
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*
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* nodeMaterial.h
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*
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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/nodeMaterial.h,v 1.24 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 NODEMATERIAL_H
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#define NODEMATERIAL_H
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#include "nodes/execnodes.h"
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extern int ExecCountSlotsMaterial(Material *node);
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extern MaterialState *ExecInitMaterial(Material *node, EState *estate, int eflags);
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extern TupleTableSlot *ExecMaterial(MaterialState *node);
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extern void ExecEndMaterial(MaterialState *node);
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extern void ExecMaterialMarkPos(MaterialState *node);
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extern void ExecMaterialRestrPos(MaterialState *node);
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extern void ExecMaterialReScan(MaterialState *node, ExprContext *exprCtxt);
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#endif /* NODEMATERIAL_H */
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