Function parse_timezone

src/expr/src/scalar/func.rs:2137–2139

Parses a named timezone like `EST` or `America/New_York`, or a fixed-offset timezone like `-05:00`. The interpretation of fixed offsets depend on whether the POSIX or ISO 8601 standard is being used.

(tz: &str, spec: TimezoneSpec)

/// The interpretation of fixed offsets depend on whether the POSIX or ISO 8601 standard is being
/// used.
pub(crate) fn parse_timezone(tz: &str, spec: TimezoneSpec) -> Result<Timezone, EvalError> {
    Timezone::parse(tz, spec).map_err(|_| EvalError::InvalidTimezone(tz.into()))
}

/// Converts the time datum `b`, which is assumed to be in UTC, to the timezone that the interval datum `a` is assumed
/// to represent. The interval is not allowed to hold months, but there are no limits on the amount of seconds.