diff options
Diffstat (limited to 'sql/opt_range.cc')
| -rw-r--r-- | sql/opt_range.cc | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/sql/opt_range.cc b/sql/opt_range.cc index f0af4b7db2a..744d222b833 100644 --- a/sql/opt_range.cc +++ b/sql/opt_range.cc @@ -4296,7 +4296,22 @@ get_mm_leaf(PARAM *param, COND *conf_func, Field *field, KEY_PART *key_part, err= value->save_in_field_no_warnings(field, 1); if (err > 0 && field->cmp_type() != value->result_type()) { - tree= 0; + if ((type == Item_func::EQ_FUNC || type == Item_func::EQUAL_FUNC) && + value->result_type() == item_cmp_type(field->result_type(), + value->result_type())) + + { + tree= new (alloc) SEL_ARG(field, 0, 0); + tree->type= SEL_ARG::IMPOSSIBLE; + } + else + { + /* + TODO: We should return trees of the type SEL_ARG::IMPOSSIBLE + for the cases like int_field > 999999999999999999999999 as well. + */ + tree= 0; + } goto end; } if (err < 0) |