use a different error for MySQL bug#11747970 - kill the query,

as it was supposed to be in bug#11747970, don't fake an error.
(this kill can be useful for other bugs too)

mysql-test/r/error_simulation.result

@@ -94,7 +94,7 @@ INSERT INTO t1 VALUES (1),(2);
 INSERT INTO t2 VALUES (1),(2);
 SET SESSION debug="+d,bug11747970_raise_error";
 INSERT IGNORE INTO t2 SELECT f1 FROM t1 a WHERE NOT EXISTS (SELECT 1 FROM t2 b WHERE a.f1 = b.f1);
-ERROR HY000: Unknown error
+ERROR 70100: Query execution was interrupted
 SET SESSION debug = DEFAULT;
 DROP TABLE t1,t2;
 #

mysql-test/t/error_simulation.test

@@ -103,7 +103,7 @@ CREATE TABLE t2(f1 INT);
 INSERT INTO t1 VALUES (1),(2);
 INSERT INTO t2 VALUES (1),(2);
 SET SESSION debug="+d,bug11747970_raise_error";
---error 1105
+--error ER_QUERY_INTERRUPTED
 INSERT IGNORE INTO t2 SELECT f1 FROM t1 a WHERE NOT EXISTS (SELECT 1 FROM t2 b WHERE a.f1 = b.f1);
 SET SESSION debug = DEFAULT;
 DROP TABLE t1,t2;

sql/sql_select.cc

@@ -3154,13 +3154,7 @@ make_join_statistics(JOIN *join, List<TABLE_LIST> &tables_list,
 #endif
 
     DBUG_EXECUTE_IF("bug11747970_raise_error",
-                    {
-                      if (!error)
-                      {
-                        my_error(ER_UNKNOWN_ERROR, MYF(0));
-                        goto error;
-                      }
-                    });
+                    { join->thd->killed= KILL_QUERY_HARD; });
     if (error)
     {
       table->file->print_error(error, MYF(0));