diff options
Diffstat (limited to 'sql/sql_type.h')
| -rw-r--r-- | sql/sql_type.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sql/sql_type.h b/sql/sql_type.h index da9913c1265..569e8742d2f 100644 --- a/sql/sql_type.h +++ b/sql/sql_type.h @@ -3356,6 +3356,14 @@ public: virtual Field *make_conversion_table_field(TABLE *TABLE, uint metadata, const Field *target) const= 0; + /* + Performs the final data type validation for a UNION element, + after the regular "aggregation for result" was done. + */ + virtual bool union_element_finalize(const Item * item) const + { + return false; + } // Automatic upgrade, e.g. for ALTER TABLE t1 FORCE virtual void Column_definition_implicit_upgrade(Column_definition *c) const { } @@ -4580,6 +4588,7 @@ public: void sortlength(THD *thd, const Type_std_attributes *item, SORT_FIELD_ATTR *attr) const; + bool union_element_finalize(const Item * item) const; bool Column_definition_prepare_stage1(THD *thd, MEM_ROOT *mem_root, Column_definition *c, |