PORTNAME should not be used anywhere anymore...I hope :)

                                  ^^^^ gcc likes this

Add unionall boolean field to SubSelect structure.

 (> 16 characters) are allowed in pg_proc (thanks Bruce!).

Add non-working code which is commented-out to copy GroupClause structures.

 and from SELECT ... INTO ... support code.
Allow NOT, IS NULL, IS NOT NULL in constraints.
Define unionall boolean flag in SubSelect structure.
Implement row descriptors: (a, b, c) = (x, y, z).
Change IS TRUE, IS FALSE, etc. to expressions using "=" rather than
 function calls to istrue() or isfalse() to allow optimization.
Force type for TRUE and FALSE to bool.

Add a few lines of test code playing with the unique flag for unions.
 Does not do much helpful yet.

 is legal. Fix a little whitespace in other declarations.

 names over 16 characters. datet_datetime() -> datetime_datetime(), etc.