Support TIME WITHOUT TIME ZONE syntax

[RCHowell]

Relevant Issue/Bug

We currently do not support the explicit WITHOUT TIME ZONE syntax defined by SQL-99

Requested Solution/Feature

Support SQL-99 grammar for timezone

<datetime type> ::= DATE
                   | TIME [ <left paren> <time precision> <right paren> ] [ <with or without time zone> ]
                   | TIMESTAMP [ <left paren> <timestamp precision> <right paren> ] [ <with or without time zone> ]

<with or without time zone> ::= WITH TIME ZONE
                              | WITHOUT TIME ZONE

Describe Alternatives

..

Additional Context

Today, WITHOUT is implicit. SQL-99 p.26 describes the alternatives

• Implicit WITH TIME 00:00:00+ZZ:ZZ
• Implicit WITHOUT TIME 00:00:00
• Explicit WITH TIME WITH TIME ZONE 00:00:00+ZZ:ZZ
• Explicit WITHOUT TIME WITHOUT TIME ZONE 00:00:00 !! MISSING !!

DoD (Definition of Done)

Support syntax for explicit WITHOUT