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9ab4d98168
a new PlannerInfo struct, which is passed around instead of the bare Query in all the planning code. This commit is essentially just a code-beautification exercise, but it does open the door to making larger changes to the planner data structures without having to muck with the widely-known Query struct.
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* geqo.h
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* prototypes for various files in optimizer/geqo
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*
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/optimizer/geqo.h,v 1.39 2005/06/05 22:32:58 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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/* contributed by:
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=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
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* Martin Utesch * Institute of Automatic Control *
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= = University of Mining and Technology =
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* utesch@aut.tu-freiberg.de * Freiberg, Germany *
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=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
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*/
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#ifndef GEQO_H
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#define GEQO_H
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#include "nodes/relation.h"
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#include "optimizer/geqo_gene.h"
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/* GEQO debug flag */
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/*
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#define GEQO_DEBUG
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*/
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/* recombination mechanism */
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/*
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#define ERX
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#define PMX
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#define CX
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#define PX
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#define OX1
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#define OX2
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*/
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#define ERX
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/*
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* Configuration options
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*
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* If you change these, update backend/utils/misc/postgresql.sample.conf
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*/
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extern int Geqo_effort; /* 1 .. 10, knob for adjustment of
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* defaults */
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#define DEFAULT_GEQO_EFFORT 5
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#define MIN_GEQO_EFFORT 1
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#define MAX_GEQO_EFFORT 10
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extern int Geqo_pool_size; /* 2 .. inf, or 0 to use default */
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extern int Geqo_generations; /* 1 .. inf, or 0 to use default */
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extern double Geqo_selection_bias;
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#define DEFAULT_GEQO_SELECTION_BIAS 2.0
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#define MIN_GEQO_SELECTION_BIAS 1.5
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#define MAX_GEQO_SELECTION_BIAS 2.0
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/*
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* Data structure to encapsulate information needed for building plan trees
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* (i.e., geqo_eval and gimme_tree).
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*/
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typedef struct
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{
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PlannerInfo *root; /* the query we are planning */
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List *initial_rels; /* the base relations */
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} GeqoEvalData;
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/* routines in geqo_main.c */
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extern RelOptInfo *geqo(PlannerInfo *root,
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int number_of_rels, List *initial_rels);
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/* routines in geqo_eval.c */
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extern Cost geqo_eval(Gene *tour, int num_gene, GeqoEvalData *evaldata);
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extern RelOptInfo *gimme_tree(Gene *tour, int num_gene,
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GeqoEvalData *evaldata);
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#endif /* GEQO_H */
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