[t:1938], make "delete from table" transactional by making it really really...

[t:1938], make "delete from table" transactional by making it really really slow, by deleting all elements one by one, through MySQL

git-svn-id: file:///svn/mysql/tokudb-engine/src@14084 c7de825b-a66e-492c-adef-691d508d4ae1

storage/tokudb/ha_tokudb.cc

@@ -5715,6 +5715,11 @@ int ha_tokudb::delete_all_rows() {
     int error = 0;
     uint curr_num_DBs = 0;
 
+    if (thd_sql_command(ha_thd()) != SQLCOM_TRUNCATE) {
+        error = HA_ERR_WRONG_COMMAND;
+        goto cleanup;
+    }
+
     //
     // prelock so we know right away if there are any potential
     // deadlocks