1. Fix a bug in socket which uses a socket variable.

1. Fix a bug in socket which uses a socket variable.
2. Support column alias without "as" so that links from
   the SQLServer work.
3. Take ';' into account when the driver adds "for read only"
   clause.
4. Use the E'.. ' notation not only in '=' expressions but
   also in LIKE expressions.
5. Change to return milliseconds parts for timestamp fields.
6. Change to return a specific sqlstate in case of multiple
   parameters.