query: SELECT document_type_code ,  document_type_name FROM Ref_document_types
question: What-all all the document type codes and document type names?
query_toks: SELECT document_type_code , document_type_name FROM Ref_document_types
query_toks_no_value: select document_type_code , document_type_name from ref_document_types
question_toks: What-all all the document type codes and document type names?