Begin of branch
Improve bison cpp with QString
QString implementation
Fix sql rules
Improve objects for where expressions
Improve where objects
Revert "Improve where objects"

This reverts commit 281fbb633cee0ad92500c31a2a9bed13bbd378a8.
All from beginning
Add alias to selected expressions
added query_exp as variant of sql plus order clause
Correct alias rule
corrected where parsing
Added select expressions to parser
Added select and where expression parsing and generating
Added parsing for oracle functions