Struct GroupKey 

pub struct GroupKey { /* private fields */ }

The reduce key of a group, decoded from its first row.

Empty unless the group came from JobReader::groups_by.

Implementations

impl GroupKey

pub fn get(&self, name: &str) -> Option<&YsonValue>

The key column name, if the group has one.

pub fn bytes(&self, name: &str) -> Option<&[u8]>

The key column name as raw bytes, if it is a string.

Reduce keys are frequently byte strings rather than text, so this does not go through str.

pub fn str(&self, name: &str) -> Option<&str>

The key column name as UTF-8, if it is a string and valid UTF-8.

pub fn i64(&self, name: &str) -> Option<i64>

The key column name as an integer, if it is one.

pub fn columns(&self) -> &[(Vec<u8>, YsonValue)]

Every key column, in the order they were requested.

pub fn is_empty(&self) -> bool

Whether any key column was decoded.

Trait Implementations

impl Clone for GroupKey

fn clone(&self) -> GroupKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GroupKey

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

Formats the value using the given formatter.

impl Default for GroupKey

fn default() -> GroupKey

Returns the “default value” for a type.

impl PartialEq for GroupKey

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for GroupKey