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New handler::index_flags() definition to make it easy to check the full used key and a specific key part.

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Added key part to optimize_range() to fix problems when using fields in key parts.
This commit is contained in:
monty@mysql.com
2004-07-08 15:45:25 +03:00
parent 6fdafa5635
commit db7efa2780
25 changed files with 83 additions and 56 deletions
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9
sql/opt_range.cc
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@ -727,7 +727,8 @@ int SQL_SELECT::test_quick_select(THD *thd, key_map keys_to_use,
found_records=check_quick_select(&param, idx, *key);
if (found_records != HA_POS_ERROR && found_records > 2 &&
head->used_keys.is_set(keynr) &&
(head->file->index_flags(keynr) & HA_KEYREAD_ONLY))
(head->file->index_flags(keynr, param.max_key_part, 1) &
HA_KEYREAD_ONLY))
{
/*
We can resolve this by only reading through this key.
@ -1028,7 +1029,8 @@ get_mm_leaf(PARAM *param, COND *conf_func, Field *field, KEY_PART *key_part,
String tmp(buff1,sizeof(buff1),value->collation.collation),*res;
uint length,offset,min_length,max_length;
if (!field->optimize_range(param->real_keynr[key_part->key]))
if (!field->optimize_range(param->real_keynr[key_part->key],
key_part->part))
DBUG_RETURN(0); // Can't optimize this
if (!(res= value->val_str(&tmp)))
DBUG_RETURN(&null_element);
@ -1093,7 +1095,8 @@ get_mm_leaf(PARAM *param, COND *conf_func, Field *field, KEY_PART *key_part,
DBUG_RETURN(new SEL_ARG(field,min_str,max_str));
}
if (!field->optimize_range(param->real_keynr[key_part->key]) &&
if (!field->optimize_range(param->real_keynr[key_part->key],
key_part->part) &&
type != Item_func::EQ_FUNC &&
type != Item_func::EQUAL_FUNC)
DBUG_RETURN(0); // Can't optimize this