1 /*------------------------------------------------------------------------- 2 * 3 * geqo_recombination.h 4 * prototypes for recombination in the genetic query optimizer 5 * 6 * Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group 7 * Portions Copyright (c) 1994, Regents of the University of California 8 * 9 * src/include/optimizer/geqo_recombination.h 10 * 11 *------------------------------------------------------------------------- 12 */ 13 14 /* contributed by: 15 =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= 16 * Martin Utesch * Institute of Automatic Control * 17 = = University of Mining and Technology = 18 * utesch@aut.tu-freiberg.de * Freiberg, Germany * 19 =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= 20 */ 21 22 /* -- parts of this are adapted from D. Whitley's Genitor algorithm -- */ 23 24 #ifndef GEQO_RECOMBINATION_H 25 #define GEQO_RECOMBINATION_H 26 27 #include "optimizer/geqo.h" 28 29 30 extern void init_tour(PlannerInfo *root, Gene *tour, int num_gene); 31 32 33 /* edge recombination crossover [ERX] */ 34 35 typedef struct Edge 36 { 37 Gene edge_list[4]; /* list of edges */ 38 int total_edges; 39 int unused_edges; 40 } Edge; 41 42 extern Edge *alloc_edge_table(PlannerInfo *root, int num_gene); 43 extern void free_edge_table(PlannerInfo *root, Edge *edge_table); 44 45 extern float gimme_edge_table(PlannerInfo *root, Gene *tour1, Gene *tour2, 46 int num_gene, Edge *edge_table); 47 48 extern int gimme_tour(PlannerInfo *root, Edge *edge_table, Gene *new_gene, 49 int num_gene); 50 51 52 /* partially matched crossover [PMX] */ 53 54 #define DAD 1 /* indicator for gene from dad */ 55 #define MOM 0 /* indicator for gene from mom */ 56 57 extern void pmx(PlannerInfo *root, 58 Gene *tour1, Gene *tour2, 59 Gene *offspring, int num_gene); 60 61 62 typedef struct City 63 { 64 int tour2_position; 65 int tour1_position; 66 int used; 67 int select_list; 68 } City; 69 70 extern City * alloc_city_table(PlannerInfo *root, int num_gene); 71 extern void free_city_table(PlannerInfo *root, City * city_table); 72 73 /* cycle crossover [CX] */ 74 extern int cx(PlannerInfo *root, Gene *tour1, Gene *tour2, 75 Gene *offspring, int num_gene, City * city_table); 76 77 /* position crossover [PX] */ 78 extern void px(PlannerInfo *root, Gene *tour1, Gene *tour2, Gene *offspring, 79 int num_gene, City * city_table); 80 81 /* order crossover [OX1] according to Davis */ 82 extern void ox1(PlannerInfo *root, Gene *mom, Gene *dad, Gene *offspring, 83 int num_gene, City * city_table); 84 85 /* order crossover [OX2] according to Syswerda */ 86 extern void ox2(PlannerInfo *root, Gene *mom, Gene *dad, Gene *offspring, 87 int num_gene, City * city_table); 88 89 #endif /* GEQO_RECOMBINATION_H */ 90