diff options
Diffstat (limited to 'sql/opt_sum.cc')
| -rw-r--r-- | sql/opt_sum.cc | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sql/opt_sum.cc b/sql/opt_sum.cc index 9770198640c..22d84d7fb5a 100644 --- a/sql/opt_sum.cc +++ b/sql/opt_sum.cc @@ -710,8 +710,10 @@ static bool find_key_for_maxmin(bool max_fl, TABLE_REF *ref, if (!(table->file->index_flags(idx, jdx, 0) & HA_READ_ORDER)) return 0; - /* Check whether the index component is partial */ - if (part->length < table->field[part->fieldnr-1]->pack_length()) + /* Check whether the index component is partial */ + Field *part_field= table->field[part->fieldnr-1]; + if ((part_field->flags & BLOB_FLAG) || + part->length < part_field->key_length()) break; if (field->eq(part->field)) |