PORT v12 sql_export

sql_export/readme/ROADMAP.rst

@@ -0,0 +1,16 @@
+* Some words are prohibited and can't be used is the query in anyways, even in
+  a select query:
+  - delete
+  - drop
+  - insert
+  - alter
+  - truncate
+  - execute
+  - create
+  - update
+
+See sql_request_abstract module to fix this issue.
+
+* checking SQL request by execution and rollback is disabled in this module
+  since variables features has been introduced. This can be fixed by
+  overloading _prepare_request_check_execution() function.