diff options
| -rw-r--r-- | sql/item_subselect.cc | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc index 6427b0ecae4..dda9986f60f 100644 --- a/sql/item_subselect.cc +++ b/sql/item_subselect.cc @@ -4352,9 +4352,9 @@ bool subselect_hash_sj_engine::init(List<Item> *tmp_columns, uint subquery_id) result= result_sink; /* - If the subquery has blobs, or the total key lenght is bigger than + If the subquery has blobs, or the total key length is bigger than some length, or the total number of key parts is more than the - allowed maximum (currently MAX_REF_PARTS == 16), then the created + allowed maximum (currently MAX_REF_PARTS == 32), then the created index cannot be used for lookups and we can't use hash semi join. If this is the case, delete the temporary table since it will not be used, and tell the caller we failed to initialize the |