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Code Issues

Update for explicit PLAN support and little cosmetic changes.

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This commit is contained in:
arnobrinkman 2002-11-09 01:42:10 +00:00
parent 97bf6ab7f1
commit 2600ac844b
1 changed files with 5 additions and 3 deletions
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8
src/jrd/opt.cpp
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@ -191,6 +191,7 @@ static int opt_debug_flag = DEBUG_NONE;
#define INDEX_COST 30.0
#define CACHE_PAGES_PER_STREAM 15
#define SELECTIVITY_THRESHOLD_FACTOR 10
#define OR_SELECTIVITY_THRESHOLD_FACTOR 2000
#define SQL_MATCH_1_CHAR '_' /* Not translatable */
#define SQL_MATCH_ANY_CHARS '%' /* Not translatable */
@ -3838,6 +3839,7 @@ static RSB gen_retrieval(TDBB tdbb,
idx_priority_level[i] =
(idx_eql_count * MAX_IDX * MAX_IDX) +
(idx_field_count * MAX_IDX) + (idx->idx_count);
}
}
@ -3864,7 +3866,7 @@ static RSB gen_retrieval(TDBB tdbb,
they are in fact, so we should be optimistic in this case. */
IDX *idx = idx_csb[last_idx];
bool should_be_used = true;
if (idx->idx_selectivity) {
if (idx->idx_selectivity && !(csb_tail->csb_plan)) {
if (selectivity * SELECTIVITY_THRESHOLD_FACTOR < idx->idx_selectivity) {
should_be_used = false;
}
@ -4976,7 +4978,7 @@ static NOD make_inversion(TDBB tdbb,
/* AB: If the boolean is a part of an earlier created index
retrieval don't think about to use a own index. */
retrieval check with the selectivity if it's really interresting to use. */
accept = TRUE;
used_in_compound = FALSE;
selectivity = 1; /* Real maximum selectivity possible is 1 */
@ -5021,7 +5023,7 @@ static NOD make_inversion(TDBB tdbb,
interesting to use it if it's better as the compound index
selectivity * factor */
if (((accept || used_in_compound) &&
(idx->idx_selectivity < selectivity * 2000)) ||
(idx->idx_selectivity < selectivity * OR_SELECTIVITY_THRESHOLD_FACTOR)) ||
(csb_tail->csb_plan)) {
match_index(tdbb, opt, stream, boolean, idx);
if (opt->opt_rpt[0].opt_lower || opt->opt_rpt[0].opt_upper) {