diff options
Diffstat (limited to 'sql/opt_range.cc')
| -rw-r--r-- | sql/opt_range.cc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sql/opt_range.cc b/sql/opt_range.cc index 636100f9c4e..94cfae2664a 100644 --- a/sql/opt_range.cc +++ b/sql/opt_range.cc @@ -3136,6 +3136,12 @@ bool calculate_cond_selectivity_for_table(THD *thd, TABLE *table, Item **cond) } + if (quick && (quick->get_type() == QUICK_SELECT_I::QS_TYPE_ROR_UNION || + quick->get_type() == QUICK_SELECT_I::QS_TYPE_INDEX_MERGE)) + { + table->cond_selectivity*= (quick->records/table_records); + } + bitmap_union(used_fields, &handled_columns); /* Check if we can improve selectivity estimates by using sampling */ |