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Implementation of the MWL#247: Make the optimizer use extended keys.

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The main patch.
.
This commit is contained in:
Igor Babaev
2011-12-31 02:25:57 -08:00
parent 1c47e1ca0d
commit b6b5f9fabe
13 changed files with 10204 additions and 72 deletions
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4
sql/opt_sum.cc
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@@ -844,7 +844,6 @@ static bool matching_cond(bool max_fl, TABLE_REF *ref, KEY *keyinfo,
1 Can use key to optimize MIN()/MAX().
In this case ref, range_fl and prefix_len are updated
*/
static bool find_key_for_maxmin(bool max_fl, TABLE_REF *ref,
Field* field, COND *cond,
@@ -873,7 +872,8 @@ static bool find_key_for_maxmin(bool max_fl, TABLE_REF *ref,
continue;
uint jdx= 0;
*prefix_len= 0;
for (part= keyinfo->key_part, part_end= part+keyinfo->key_parts ;
part_end= keyinfo->key_part+table->actual_n_key_parts(keyinfo);
for (part= keyinfo->key_part ;
part != part_end ;
part++, jdx++, key_part_to_use= (key_part_to_use << 1) | 1)
{