Enum ExtractField 

pub enum ExtractField {
    Year,
    Month,
    Day,
    Hour,
    Minute,
    Second,
    Microsecond,
    Epoch,
    Dow,
    Isodow,
    Doy,
    Week,
    Isoyear,
    Quarter,
    Decade,
    Century,
    Millennium,
    Julian,
    Millisecond,
    Timezone,
    TimezoneHour,
    TimezoneMinute,
    Other(String),
}

Variants

Year

Month

Day

Hour

Minute

Second

Microsecond

Epoch

Seconds since 1970-01-01 00:00:00 UTC (PG returns numeric; SPG keeps the integer convention — truncated seconds).

Dow

Day of week, 0 = Sunday … 6 = Saturday.

Isodow

ISO day of week, 1 = Monday … 7 = Sunday.

Doy

Day of year, 1-366.

Week

ISO 8601 week number, 1-53.

Isoyear

ISO 8601 week-numbering year (pairs with Week).

Quarter

Quarter, 1-4.

Decade

Year divided by 10 (floor).

Century

Century — 2001-2100 is century 21.

Millennium

Millennium — 2001-3000 is millennium 3.

Julian

Julian day number (truncated for timestamps).

Millisecond

Seconds and fraction in milliseconds (ss·1000 + frac).

Timezone

UTC offset in seconds — SPG sessions run UTC, so 0.

TimezoneHour

Hour component of the UTC offset — 0.

TimezoneMinute

Minute component of the UTC offset — 0.

Other(String)

v7.39 (round 253) — a field name the parser does not know. PG resolves EXTRACT fields at RUNTIME and reports them with the source type (unit "nosuch" not recognized for type timestamp without time zone, 22023), so the parser carries the raw name instead of rejecting.

Trait Implementations

impl Clone for ExtractField

fn clone(&self) -> ExtractField

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ExtractField

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ExtractField

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for ExtractField

impl PartialEq for ExtractField

fn eq(&self, other: &ExtractField) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ExtractField