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37168b8da4
right thing with variable-free clauses that contain noncachable functions, such as 'WHERE random() < 0.5' --- these are evaluated once per potential output tuple. Expressions that contain only Params are now candidates to be indexscan quals --- for example, 'var = ($1 + 1)' can now be indexed. Cope with RelabelType nodes atop potential indexscan variables --- this oversight prevents 7.0.* from recognizing some potentially indexscanable situations.
26 lines
801 B
C
26 lines
801 B
C
/*-------------------------------------------------------------------------
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*
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* nodeNestloop.h
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*
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*
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*
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* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: nodeNestloop.h,v 1.13 2000/08/13 02:50:20 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef NODENESTLOOP_H
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#define NODENESTLOOP_H
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#include "nodes/plannodes.h"
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extern TupleTableSlot *ExecNestLoop(NestLoop *node);
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extern bool ExecInitNestLoop(NestLoop *node, EState *estate, Plan *parent);
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extern int ExecCountSlotsNestLoop(NestLoop *node);
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extern void ExecEndNestLoop(NestLoop *node);
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extern void ExecReScanNestLoop(NestLoop *node, ExprContext *exprCtxt,
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Plan *parent);
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#endif /* NODENESTLOOP_H */
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