Converts Nullable!T to Value
Constructs Value from Date
Constructs Value from TimeOfDay
Constructs Value from TimeStamp or from TimeStampUTC
Constructs Value from DateTime It uses Timestamp without TZ as a resulting PG type
Constructs Value from SysTime Note that SysTime has a precision in hnsecs and PG TimeStamp in usecs. It means that PG value will have 10 times lower precision. And as both types are using long for internal storage it also means that PG TimeStamp can store greater range of values than SysTime.