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Merge mysql.com:/home/timka/mysql/src/5.0-virgin

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into mysql.com:/home/timka/mysql/src/5.0-bug-8576
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unknown 2005-02-23 16:03:58 +02:00
commit a86dd5b707
1 changed files with 6 additions and 2 deletions
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8
sql/opt_range.cc
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@ -7030,8 +7030,12 @@ get_best_group_min_max(PARAM *param, SEL_TREE *tree)
cur_group_key_parts, tree, cur_index_tree, cur_group_key_parts, tree, cur_index_tree,
cur_quick_prefix_records, have_min, have_max, cur_quick_prefix_records, have_min, have_max,
&cur_read_cost, &cur_records); &cur_read_cost, &cur_records);
/*
if (cur_read_cost < best_read_cost) If cur_read_cost is lower than best_read_cost use cur_index.
Do not compare doubles directly because they may have different
representations (64 vs. 80 bits).
*/
if (cur_read_cost < best_read_cost - (DBL_EPSILON * cur_read_cost))
{ {
index_info= cur_index_info; index_info= cur_index_info;
index= cur_index; index= cur_index;