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Optimizer can now estimate selectivity of IS NULL, IS NOT NULL,
IS TRUE, etc, with some degree of verisimilitude. Split out selectivity support functions from builtins.h into a new header file selfuncs.h, so as to reduce the number of header files builtins.h must depend on. Fix a few missing inclusions exposed thereby. From Joe Conway, with some kibitzing from Tom Lane.
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@ -9,7 +9,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.107 2001/06/17 02:05:19 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.108 2001/06/25 21:11:43 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -37,6 +37,7 @@
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#include "utils/builtins.h"
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#include "utils/fmgroids.h"
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#include "utils/lsyscache.h"
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#include "utils/selfuncs.h"
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#include "utils/syscache.h"
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