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The pilot patch for mwl#253.

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This commit is contained in:
Igor Babaev
2013-03-11 07:44:24 -07:00
parent 938d47dcdc
commit fc1c8ffdad
25 changed files with 1219 additions and 34 deletions
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6
sql/opt_range_mrr.cc
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@@ -268,8 +268,10 @@ walk_up_n_right:
range->end_key.keypart_map= make_prev_keypart_map(cur->max_key_parts);
if (!(cur->min_key_flag & ~NULL_RANGE) && !cur->max_key_flag &&
(uint)key_tree->part+1 == seq->param->table->key_info[seq->real_keyno].key_parts &&
(seq->param->table->key_info[seq->real_keyno].flags & HA_NOSAME) &&
(seq->real_keyno == MAX_KEY ||
((uint)key_tree->part+1 ==
seq->param->table->key_info[seq->real_keyno].key_parts &&
(seq->param->table->key_info[seq->real_keyno].flags & HA_NOSAME))) &&
range->start_key.length == range->end_key.length &&
!memcmp(seq->param->min_key,seq->param->max_key,range->start_key.length))
range->range_flag= UNIQUE_RANGE | (cur->min_key_flag & NULL_RANGE);