uninitialized variables. I _think_ the logic is preserved...

Support SQL92 syntax for type coersion of strings (type 'typeval').
 Example: "DATETIME 'now'". This works only for string constants and can
 not replace the CAST and ::type syntax which behave identically in this
 context.

Check decoding of integer in x - y syntax (already done for most ints).

 hardcoded values.

Check valid numeric input more carefully for delta times.
Implement day of year as possible input to datetime_part().

Remove unused variable addrLen.