Timestamp print format based on input #640
Description
TIMESTAMP WITH TIME ZONE and TIMESTAMPTZ theoretically are the same on Postgresql (1), but they are not for other dialects like Oracle(2) (that doesn't support TIMESTAMPTZ). Therefore, we should parse EXACTLY the same timestamp info as input and output, instead of losing its conversion.
The standard only supports TIMESTAMP WITH TIMEZONE(3)
This applies to TIME as well.
[1] : https://www.postgresql.org/docs/current/datatype-datetime.html
[2] : https://docs.oracle.com/en/database/oracle/oracle-database/12.2/nlspg/datetime-data-types-and-time-zone-support.html#GUID-3F1C388E-C651-43D5-ADBC-1A49E5C2CA05
[3] : https://jakewheat.github.io/sql-overview/sql-2016-foundation-grammar.html#datetime-type
Fixes: #589