Merge pull request #1 from franz-see/master

Update from upstream
'Table Must Exist' keyword implementation for Oracle database

Origin selectStatement does not work for Oracle because it has different implementation
This fix implements Oracle specific statement (cx_Oracle module).
Other databases (database modules) use origin selectStatement.

Change-Id: I5bfa0f3fcdddd07fe077e75cd49bdedfa5ea9bfa
Merge pull request #28 from zmlpjuran/master

'Table Must Exist' keyword implementation for Oracle database