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/*-------------------------------------------------------------------------
*
* internal.h--
* Definitions required throughout the query optimizer.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: internal.h,v 1.1.1.1 1996/07/09 06:21:34 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef INTERNAL_H
#define INTERNAL_H
/*
* ---------- SHARED MACROS
*
* Macros common to modules for creating, accessing, and modifying
* query tree and query plan components.
* Shared with the executor.
*
*/
#include "nodes/nodes.h"
#include "nodes/primnodes.h"
#include "nodes/plannodes.h"
#include "parser/parsetree.h"
#include "nodes/relation.h"
#include "catalog/pg_index.h" /* for INDEX_MAX_KEYS */
#include "utils/syscache.h" /* for SearchSysCacheGetAttribute, etc. */
/*
* System-dependent tuning constants
*
*/
#define _CPU_PAGE_WEIGHT_ 0.065 /* CPU-to-page cost weighting factor */
#define _PAGE_SIZE_ 8192 /* BLCKSZ (from ../h/bufmgr.h) */
#define _MAX_KEYS_ INDEX_MAX_KEYS /* maximum number of keys in an index */
#define _TID_SIZE_ 6 /* sizeof(itemid) (from ../h/itemid.h) */
/*
* Size estimates
*
*/
/* The cost of sequentially scanning a materialized temporary relation
*/
#define _TEMP_SCAN_COST_ 10
/* The number of pages and tuples in a materialized relation
*/
#define _TEMP_RELATION_PAGES_ 1
#define _TEMP_RELATION_TUPLES_ 10
/* The length of a variable-length field in bytes
*/
#define _DEFAULT_ATTRIBUTE_WIDTH_ (2 * _TID_SIZE_)
/*
* Flags and identifiers
*
*/
/* Identifier for (sort) temp relations */
/* used to be -1 */
#define _TEMP_RELATION_ID_ InvalidOid
/* Identifier for invalid relation OIDs and attribute numbers for use by
* selectivity functions
*/
#define _SELEC_VALUE_UNKNOWN_ -1
/* Flag indicating that a clause constant is really a parameter (or other
* non-constant?), a non-parameter, or a constant on the right side
* of the clause.
*/
#define _SELEC_NOT_CONSTANT_ 0
#define _SELEC_IS_CONSTANT_ 1
#define _SELEC_CONSTANT_LEFT_ 0
#define _SELEC_CONSTANT_RIGHT_ 2
#define TOLERANCE 0.000001
#define FLOAT_EQUAL(X,Y) ((X) - (Y) < TOLERANCE)
#define FLOAT_IS_ZERO(X) (FLOAT_EQUAL(X,0.0))
extern int BushyPlanFlag;
/* #define deactivate_joininfo(joininfo) joininfo->inactive=true*/
/*#define joininfo_inactive(joininfo) joininfo->inactive */
#endif /* INTERNAL_H */
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