diff options
Diffstat (limited to 'sql/opt_range.cc')
| -rw-r--r-- | sql/opt_range.cc | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sql/opt_range.cc b/sql/opt_range.cc index d0ca4ea7b23..28ee8af0699 100644 --- a/sql/opt_range.cc +++ b/sql/opt_range.cc @@ -8564,6 +8564,13 @@ QUICK_SELECT_DESC::QUICK_SELECT_DESC(QUICK_RANGE_SELECT *q, used_key_parts (used_key_parts_arg) { QUICK_RANGE *r; + /* + Use default MRR implementation for reverse scans. No table engine + currently can do an MRR scan with output in reverse index order. + */ + multi_range_length= 0; + multi_range= NULL; + multi_range_buff= NULL; QUICK_RANGE **pr= (QUICK_RANGE**)ranges.buffer; QUICK_RANGE **end_range= pr + ranges.elements; |