MDEV-35176 ASAN errors in Field_vector::store with optimizer_trace enabled

Author: vuvova

mysql-test/main/vector2.result

@@ -229,3 +229,8 @@ select hex(v) from t;
 hex(v)
 0000000000000000
 drop table t;
+#
+# MDEV-35176 ASAN errors in Field_vector::store with optimizer_trace enabled
+#
+create table t (pk int primary key, v vector(2) not null, key(v(6)));
+ERROR HY000: Incorrect prefix key; the used key part isn't a string, the used length is longer than the key part, or the storage engine doesn't support unique prefix keys

mysql-test/main/vector2.test

@@ -174,3 +174,9 @@ create table t (v vector(2) not null);
 insert ignore into t values (1);
 select hex(v) from t;
 drop table t;
+
+--echo #
+--echo # MDEV-35176 ASAN errors in Field_vector::store with optimizer_trace enabled
+--echo #
+--error ER_WRONG_SUB_KEY
+create table t (pk int primary key, v vector(2) not null, key(v(6)));

sql/sql_type_vector.h

@@ -26,6 +26,7 @@ class Type_handler_vector: public Type_handler_varchar
   const Type_handler *type_handler_for_comparison() const override;
   virtual Item *create_typecast_item(THD *thd, Item *item,
                   const Type_cast_attributes &attr) const override;
+  bool type_can_have_key_part() const override { return false; }
   bool subquery_type_allows_materialization(const Item *, const Item *, bool)
     const override
   {