diff options
Diffstat (limited to 'sql/sql_select.cc')
| -rw-r--r-- | sql/sql_select.cc | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 1748080dd71..26987c9072e 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -8946,7 +8946,7 @@ best_access_path(JOIN *join, We assume here that, thanks to the hash, we don't have to compare all row combinations, only a HASH_FANOUT (10%) rows in the cache. */ - row_copy_cost= (ROW_COPY_COST_THD(thd) * 2 * + row_copy_cost= (ROW_COPY_COST_THD(thd) * JOIN_CACHE_ROW_COPY_COST_FACTOR(thd)); cmp_time= (record_count * row_copy_cost + rnd_records * record_count * HASH_FANOUT * @@ -8957,6 +8957,9 @@ best_access_path(JOIN *join, best.cost= cur_cost; best.records_read= best.records_after_filter= rows2double(s->records); best.records= rnd_records; +#ifdef NOT_YET + set_if_smaller(best.records_out, rnd_records * HASH_FANOUT); +#endif best.key= hj_start_key; best.ref_depends_map= 0; best.use_join_buffer= TRUE; |