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> There are some minor fixes to the GEQO. 

> Please apply them to the direcory "backend/optimizer/geqo".
> Two new files with different crossover techniques are included.
> Standard procedure is optimization by means of "geqo_erx.c"
> (Edge Recombination Crossover).

From: "Martin S. Utesch" <utesch@aut.tu-freiberg.de>
This commit is contained in:
Marc G. Fournier 1997-03-14 16:03:02 +00:00
parent f749fe4934
commit 71fd8d4a4b
4 changed files with 223 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/backend/optimizer/geqo/Makefile
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@ -5,7 +5,7 @@
#
# Copyright (c) 1994, Regents of the University of California
#
# $Id: Makefile,v 1.2 1997/02/19 14:51:55 scrappy Exp $
# $Id: Makefile,v 1.3 1997/03/14 16:02:40 scrappy Exp $
#
#-------------------------------------------------------------------------
@ -21,9 +21,8 @@ CFLAGS+=$(INCLUDE_OPT) -Wno-error
OBJS = geqo_copy.o geqo_eval.o geqo_main.o geqo_misc.o \
geqo_params.o geqo_paths.o geqo_pool.o geqo_recombination.o \
geqo_selection.o \
geqo_erx.o geqo_pmx.o geqo_cx.o geqo_px.o
geqo_erx.o geqo_pmx.o geqo_cx.o geqo_px.o geqo_ox1.o geqo_ox2.o
# not ready yet: geqo_ox1.o geqo_ox2.o
# deprecated: minspantree.o
all: SUBSYS.o

10
src/backend/optimizer/geqo/geqo_main.c
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@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: geqo_main.c,v 1.2 1997/02/19 14:51:59 scrappy Exp $
* $Id: geqo_main.c,v 1.3 1997/03/14 16:02:51 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@ -71,22 +71,22 @@ geqo(Query *root)
Chromosome *daddy;
Chromosome *kid;
#if defined(ERX)
Edge *edge_table; /* list of edges */
int edge_failures=0;
float difference;
#endif
#if defined(CX) || defined(PX) || defined(QX1) || defined(QX2)
#if defined(CX) || defined(PX) || defined(OX1) || defined(OX2)
City *city_table; /* list of cities */
#endif
#if defined(CX)
int cycle_diffs=0;
#endif
#if defined(CX) && defined(GEQO_DEBUG)
int mutations=0;
#endif
int number_of_rels;
Pool *pool;

103
src/backend/optimizer/geqo/geqo_ox1.c Normal file
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@ -0,0 +1,103 @@
/*------------------------------------------------------------------------
*
* geqo_ox1.c--
*
* order crossover [OX] routines;
* OX1 operator according to Davis
* (Proc Int'l Joint Conf on AI)
*
* $Id: geqo_ox1.c,v 1.1 1997/03/14 16:02:58 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
/* contributed by:
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
* Martin Utesch * Institute of Automatic Control *
= = University of Mining and Technology =
* utesch@aut.tu-freiberg.de * Freiberg, Germany *
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
*/
/* the ox algorithm is adopted from Genitor : */
/*************************************************************/
/* */
/* Copyright (c) 1990 */
/* Darrell L. Whitley */
/* Computer Science Department */
/* Colorado State University */
/* */
/* Permission is hereby granted to copy all or any part of */
/* this program for free distribution. The author's name */
/* and this copyright notice must be included in any copy. */
/* */
/*************************************************************/
#include "postgres.h"
#include "nodes/pg_list.h"
#include "nodes/relation.h"
#include "nodes/primnodes.h"
#include "utils/palloc.h"
#include "utils/elog.h"
#include "optimizer/internal.h"
#include "optimizer/paths.h"
#include "optimizer/pathnode.h"
#include "optimizer/clauses.h"
#include "optimizer/cost.h"
#include "optimizer/geqo_gene.h"
#include "optimizer/geqo.h"
#include "optimizer/geqo_recombination.h"
#include "optimizer/geqo_random.h"
/* ox1--
*
* position crossover
*/
void
ox1(Gene *tour1, Gene *tour2, Gene *offspring, int num_gene, City *city_table)
{
int left, right, k, p, temp;
/* initialize city table */
for (k = 1; k <= num_gene; k++)
city_table[k].used = 0;
/* select portion to copy from tour1 */
left = geqo_randint (num_gene - 1, 0);
right = geqo_randint (num_gene - 1, 0);
if (left > right)
{
temp = left;
left = right;
right = temp;
}
/* copy portion from tour1 to offspring */
for (k = left; k <= right; k++)
{
offspring[k] = tour1[k];
city_table[(int) tour1[k]].used = 1;
}
k = (right + 1) % num_gene; /* index into offspring */
p = k; /* index into tour2 */
/* copy stuff from tour2 to offspring */
while (k != left)
{
if (!city_table[(int) tour2[p]].used)
{
offspring[k] = tour2[p];
k = (k + 1) % num_gene;
city_table[(int) tour2[p]].used = 1;
}
p = (p + 1) % num_gene; /* increment tour2-index */
}
}

113
src/backend/optimizer/geqo/geqo_ox2.c Normal file
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@ -0,0 +1,113 @@
/*------------------------------------------------------------------------
*
* geqo_ox2.c--
*
* order crossover [OX] routines;
* OX2 operator according to Syswerda
* (The Genetic Algorithms Handbook, ed L Davis)
*
* $Id: geqo_ox2.c,v 1.1 1997/03/14 16:03:02 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
/* contributed by:
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
* Martin Utesch * Institute of Automatic Control *
= = University of Mining and Technology =
* utesch@aut.tu-freiberg.de * Freiberg, Germany *
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
*/
/* the ox algorithm is adopted from Genitor : */
/*************************************************************/
/* */
/* Copyright (c) 1990 */
/* Darrell L. Whitley */
/* Computer Science Department */
/* Colorado State University */
/* */
/* Permission is hereby granted to copy all or any part of */
/* this program for free distribution. The author's name */
/* and this copyright notice must be included in any copy. */
/* */
/*************************************************************/
#include "postgres.h"
#include "nodes/pg_list.h"
#include "nodes/relation.h"
#include "nodes/primnodes.h"
#include "utils/palloc.h"
#include "utils/elog.h"
#include "optimizer/internal.h"
#include "optimizer/paths.h"
#include "optimizer/pathnode.h"
#include "optimizer/clauses.h"
#include "optimizer/cost.h"
#include "optimizer/geqo_gene.h"
#include "optimizer/geqo.h"
#include "optimizer/geqo_recombination.h"
#include "optimizer/geqo_random.h"
/* ox2--
*
* position crossover
*/
void
ox2(Gene *tour1, Gene *tour2, Gene *offspring, int num_gene, City *city_table)
{
int k, j, count, pos, select, num_positions;
/* initialize city table */
for (k = 1; k <= num_gene; k++) {
city_table[k].used = 0;
city_table[k-1].select_list = -1;
}
/* determine the number of positions to be inherited from tour1 */
num_positions = geqo_randint (2*num_gene/3, num_gene/3);
/* make a list of selected cities */
for (k=0; k<num_positions; k++) {
pos = geqo_randint (num_gene - 1, 0);
city_table[pos].select_list = (int) tour1[pos];
city_table[(int) tour1[pos]].used = 1; /* mark used */
}
count = 0;
k = 0;
/* consolidate the select list to adjacent positions */
while (count < num_positions) {
if (city_table[k].select_list == -1) {
j = k + 1;
while ((city_table[j].select_list == -1) && (j < num_gene))
j++;
city_table[k].select_list = city_table[j].select_list;
city_table[j].select_list = -1;
count ++;
}
else
count ++;
k++;
}
select = 0;
for (k=0; k<num_gene; k++) {
if (city_table[(int) tour2[k]].used) {
offspring[k] = (Gene) city_table[select].select_list;
select ++; /* next city in the select list */
}
else /* city isn't used yet, so inherit from tour2 */
offspring[k] = tour2[k];
}
}