Function replace_time_zone 

pub fn replace_time_zone(
    input: Expression,
    ambiguous: Expression,
    options: ReplaceTimeZoneOptions,
) -> Expression

Reinterpret timestamp wall times in options.time_zone, preserving the time unit.

ambiguous is a UTF-8 expression containing raise, earliest, latest, or null. Removing the timezone preserves wall time in a timezone-naive timestamp.