Incorrect datetime value outputs in sqlite

[bcho]

For this query:

from test_table
select [date = @2022-12-31, time = @08:30, timestamp = @2020-01-01T13:19:55-0800]

current implementation emits following query for sqlite dialect:

SELECT
  DATE '2022-12-31' AS date,
  TIME '08:30' AS time,
  TIMESTAMP '2020-01-01T13:19:55-0800' AS timestamp
FROM
  test_table

However, according to sqlite's doc: https://www.sqlite.org/lang_datefunc.html , these typed field outputs are incorrect as sqlite uses function to convert string to time values.