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Merge latest MariaDB 5.1 into MWL#116.

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2010-11-01 15:41:09 +01:00
parent 5614ebe7ed c6b19ea001
commit fb8244a57c
253 changed files with 4992 additions and 1598 deletions
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16
sql/handler.cc
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@ -2090,7 +2090,21 @@ handler *handler::clone(MEM_ROOT *mem_root)
return new_handler;
}
double handler::keyread_time(uint index, uint ranges, ha_rows rows)
{
/*
It is assumed that we will read trough the whole key range and that all
key blocks are half full (normally things are much better). It is also
assumed that each time we read the next key from the index, the handler
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.
*/
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;
}
void handler::ha_statistic_increment(ulong SSV::*offset) const
{