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92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* internal.h--
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* Definitions required throughout the query optimizer.
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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: internal.h,v 1.12 1999/02/02 03:45:24 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef INTERNAL_H
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#define INTERNAL_H
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/*
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* ---------- SHARED MACROS
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*
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* Macros common to modules for creating, accessing, and modifying
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* query tree and query plan components.
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* Shared with the executor.
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*
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*/
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/*
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* System-dependent tuning constants
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*
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*/
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#define _CPU_PAGE_WEIGHT_ 0.033/* CPU-heap-to-page cost weighting factor */
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#define _CPU_INDEX_PAGE_WEIGHT_ 0.017 /* CPU-index-to-page cost
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* weighting factor */
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#define _MAX_KEYS_ INDEX_MAX_KEYS /* maximum number of keys in an
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* index */
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#define _TID_SIZE_ 6 /* sizeof(itemid) (from ../h/itemid.h) */
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/*
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* Size estimates
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*
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*/
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/* The cost of sequentially scanning a materialized temporary relation
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*/
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#define _TEMP_SCAN_COST_ 10
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/* The number of pages and tuples in a materialized relation
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*/
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#define _TEMP_RELATION_PAGES_ 1
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#define _TEMP_RELATION_TUPLES_ 10
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/* The length of a variable-length field in bytes
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*/
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#define _DEFAULT_ATTRIBUTE_WIDTH_ (2 * _TID_SIZE_)
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/*
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* Flags and identifiers
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*
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*/
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/* Identifier for (sort) temp relations */
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/* used to be -1 */
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#define _TEMP_RELATION_ID_ InvalidOid
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/* Identifier for invalid relation OIDs and attribute numbers for use by
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* selectivity functions
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*/
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#define _SELEC_VALUE_UNKNOWN_ -1
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/* Flag indicating that a clause constant is really a parameter (or other
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* non-constant?), a non-parameter, or a constant on the right side
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* of the clause.
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*/
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#define _SELEC_NOT_CONSTANT_ 0
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#define _SELEC_IS_CONSTANT_ 1
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#define _SELEC_CONSTANT_LEFT_ 0
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#define _SELEC_CONSTANT_RIGHT_ 2
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#define TOLERANCE 0.000001
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#define FLOAT_EQUAL(X,Y) ((X) - (Y) < TOLERANCE)
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#define FLOAT_IS_ZERO(X) (FLOAT_EQUAL(X,0.0))
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extern int BushyPlanFlag;
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/* #define deactivate_joininfo(joininfo) joininfo->inactive=true*/
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/*#define joininfo_inactive(joininfo) joininfo->inactive */
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/* GEQO switch according to number of relations in a query */
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#define GEQO_RELS 6
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#endif /* INTERNAL_H */
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