Enum MeasureSlotKind 

#[repr(i32)]
pub enum MeasureSlotKind {
    Unspecified = 0,
    Last = 1,
    First = 2,
    Classifier = 3,
    CountStar = 4,
    Count = 5,
    Min = 6,
    Max = 7,
    Sum = 8,
}

How a MeasureSlot resolves against the rows of a match. This is the wire enum used directly (the variants are documented in stream_plan.proto): a parallel binder-side enum would only add a conversion layer for the plan node to keep in lockstep.

Variants

Unspecified = 0

Last = 1

LAST(var.col): column value of the last row labeled var in the match (also the meaning of a bare var.col under ONE ROW PER MATCH FINAL semantics).

First = 2

FIRST(var.col): column value of the first such row.

Classifier = 3

CLASSIFIER(): the pattern variable bound to the match’s last row (var/col_idx unused).

CountStar = 4

COUNT(*): number of rows in the match (var/col_idx unused).

Count = 5

COUNT(var.col): number of rows labeled var whose col is non-null.

Min = 6

MIN(var.col) / MAX(var.col): min / max of col over rows labeled var.

Max = 7

Sum = 8

SUM(var.col): evaluated by agg_call over the rows labeled var. (AVG is lowered by the planner into a SUM slot plus a COUNT slot and a division expression.)

Implementations

impl Kind

pub fn is_valid(value: i32) -> bool

Returns true if value is a variant of Kind.

pub fn from_i32(value: i32) -> Option<Kind>

👎Deprecated:

Use the TryFrom<i32> implementation instead

Converts an i32 to a Kind, or None if value is not a valid variant.

impl Kind

pub fn as_str_name(&self) -> &'static str

String value of the enum field names used in the ProtoBuf definition.

The values are not transformed in any way and thus are considered stable (if the ProtoBuf definition does not change) and safe for programmatic use.

pub fn from_str_name(value: &str) -> Option<Kind>

Creates an enum from field names used in the ProtoBuf definition.

Trait Implementations

impl Clone for Kind

fn clone(&self) -> Kind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Kind

impl Debug for Kind

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

Formats the value using the given formatter.

impl Default for Kind

fn default() -> Kind

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Kind

fn deserialize<D>( deserializer: D, ) -> Result<Kind, <D as Deserializer<'de>>::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Kind

impl Hash for Kind

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Kind

fn cmp(&self, other: &Kind) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Kind

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Kind

fn partial_cmp(&self, other: &Kind) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for Kind

fn serialize<S>( &self, serializer: S, ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Kind

impl TryFrom<i32> for Kind

type Error = UnknownEnumValue

The type returned in the event of a conversion error.

fn try_from(value: i32) -> Result<Kind, UnknownEnumValue>

Performs the conversion.