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Merge MWL #247 from mariadb 5.3 -> mariadb 5.5.

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This commit is contained in:
Igor Babaev
2012-03-02 15:03:20 -08:00
parent 8b469eb515 2521ac0c7f
commit 8bc5045ea3
18 changed files with 10538 additions and 94 deletions
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9
sql/handler.cc
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@@ -2191,11 +2191,12 @@ double handler::keyread_time(uint index, uint ranges, ha_rows rows)
performs a random seek, thus the cost is proportional to the number of
blocks read. This model does not take into account clustered indexes -
engines that support that (e.g. InnoDB) may want to overwrite this method.
The model counts in the time to read index entries from cache.
*/
double keys_per_block= (stats.block_size/2.0/
(table->key_info[index].key_length +
ref_length) + 1);
return (rows + keys_per_block - 1)/ keys_per_block;
ulong len= table->key_info[index].key_length + ref_length;
double keys_per_block= (stats.block_size/2.0/len+1);
return (rows + keys_per_block-1)/ keys_per_block +
len*rows/(stats.block_size+1)/TIME_FOR_COMPARE ;
}
void **handler::ha_data(THD *thd) const