MDEV-35043 Unsuitable error upon an attempt to create MEMORY table with vector key

MEMORY engine doesn't support blobs

mysql-test/main/vector2.result

@@ -39,3 +39,8 @@ set session mhnsw_max_edges_per_node = @@mhnsw_max_edges_per_node + 1;
 create table t2 like t;
 alter table t force;
 drop table t, t2;
+#
+# MDEV-35043 Unsuitable error upon an attempt to create MEMORY table with vector key
+#
+create table t (v binary(255) not null, vector index(v)) engine=memory;
+ERROR HY000: Table storage engine 'MEMORY' does not support the create option 'VECTOR'

mysql-test/main/vector2.test

@@ -41,3 +41,9 @@ set session mhnsw_max_edges_per_node = @@mhnsw_max_edges_per_node + 1;
 create table t2 like t;
 alter table t force;
 drop table t, t2;
+
+--echo #
+--echo # MDEV-35043 Unsuitable error upon an attempt to create MEMORY table with vector key
+--echo #
+--error ER_ILLEGAL_HA_CREATE_OPTION
+create table t (v binary(255) not null, vector index(v)) engine=memory;

storage/heap/ha_heap.cc

@@ -651,6 +651,12 @@ static int heap_prepare_hp_create_info(TABLE *table_arg, bool internal_table,
 
   bzero(hp_create_info, sizeof(*hp_create_info));
 
+  if (share->total_keys > keys)
+  {
+    my_error(ER_ILLEGAL_HA_CREATE_OPTION, MYF(0), "MEMORY", "VECTOR");
+    return HA_ERR_UNSUPPORTED;
+  }
+
   for (key= parts= 0; key < keys; key++)
     parts+= table_arg->key_info[key].user_defined_key_parts;