diff options
| author | Tom Lane | 1999-05-17 00:25:34 +0000 |
|---|---|---|
| committer | Tom Lane | 1999-05-17 00:25:34 +0000 |
| commit | 1332c1e14404407c9a106bf7096e8f58b16dc566 (patch) | |
| tree | 523343f9485b4fc7cae696786787bfaccaf49b83 /src/include/optimizer | |
| parent | c686be8d5687f5e31df0a97ee52ccfe5842071b5 (diff) | |
Change GEQO optimizer to release memory after each gene
is evaluated. This bounds memory usage to something reasonable even
when many tables are being joined.
Diffstat (limited to 'src/include/optimizer')
| -rw-r--r-- | src/include/optimizer/geqo.h | 25 |
1 files changed, 10 insertions, 15 deletions
diff --git a/src/include/optimizer/geqo.h b/src/include/optimizer/geqo.h index 9a4c61d4a05..aba1d86096b 100644 --- a/src/include/optimizer/geqo.h +++ b/src/include/optimizer/geqo.h @@ -5,7 +5,7 @@ * * Copyright (c) 1994, Regents of the University of California * - * $Id: geqo.h,v 1.13 1999/02/18 04:55:54 momjian Exp $ + * $Id: geqo.h,v 1.14 1999/05/17 00:25:32 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -56,27 +56,22 @@ #define SELECTION_BIAS 2.0 /* selective pressure within population */ /* should be 1.5 <= SELECTION_BIAS <= 2.0 */ -int PoolSize; -int Generations; +/* parameter values set in geqo_params.c */ +extern int PoolSize; +extern int Generations; +extern long RandomSeed; +extern double SelectionBias; -long RandomSeed; /* defaults to (long) time(NULL) in - * geqo_params.c */ -double SelectionBias; - -/* logarithmic base for rel->size decrease in case of long - queries that cause an integer overflow; used in geqo_eval.c */ - -#define GEQO_LOG_BASE 1.5 /* should be 1.0 < GEQO_LOG_BASE <= 2.0 */ - /* ^^^ */ - -/* geqo prototypes */ +/* routines in geqo_main.c */ extern RelOptInfo *geqo(Query *root); +/* routines in geqo_params.c */ extern void geqo_params(int string_length); +/* routines in geqo_eval.c */ +extern void geqo_eval_startup(void); extern Cost geqo_eval(Query *root, Gene *tour, int num_gene); extern RelOptInfo *gimme_tree(Query *root, Gene *tour, int rel_count, int num_gene, RelOptInfo *old_rel); - #endif /* GEQO_H */ |