Add the following scalar functions to remove the need for ODBC driver translation for them:
- add LEFT() [alias for STRLEFT()]
- add RIGHT() [alias for STRRIGHT()]
- add WEEK() [alias for WEEKOFYEAR()]
- add QUARTER() [new]
- add MONTHNAME() [new]
And while we're at it, we'll add QUARTER to date_part() and extract() as well.