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ac4913a0dd
identified by Hiroshi (incorrect cost attributed to OR clauses after multiple passes through set_rest_selec()). I think the code was trying to allow selectivities of OR subclauses to be passed in from outside, but noplace was actually passing any useful data, and set_rest_selec() was passing wrong data. Restructure representation of "indexqual" in IndexPath nodes so that it is the same as for indxqual in completed IndexScan nodes: namely, a toplevel list with an entry for each pass of the index scan, having sublists that are implicitly-ANDed index qual conditions for that pass. You don't want to know what the old representation was :-( Improve documentation of OR-clause indexscan functions. Remove useless 'notclause' field from RestrictInfo nodes. (This might force an initdb for anyone who has stored rules containing RestrictInfos, but I do not think that RestrictInfo ever appears in completed plans.)
27 lines
839 B
C
27 lines
839 B
C
/*-------------------------------------------------------------------------
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*
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* restrictinfo.h
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* prototypes for restrictinfo.c.
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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* $Id: restrictinfo.h,v 1.6 1999/07/24 23:21:05 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef RESTRICTINFO_H
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#define RESTRICTINFO_H
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#include "nodes/relation.h"
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extern bool restriction_is_or_clause(RestrictInfo *restrictinfo);
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extern List *get_actual_clauses(List *restrictinfo_list);
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extern void get_relattvals(List *restrictinfo_list, List **attnos,
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List **values, List **flags);
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extern void get_joinvars(Oid relid, List *restrictinfo_list,
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List **attnos, List **values, List **flags);
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extern List *get_opnos(List *restrictinfo_list);
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#endif /* RESTRICTINFO_H */
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