Struct hydroflow::compiled::pull::HalfMultisetJoinState

pub struct HalfMultisetJoinState<Key, ValBuild, ValProbe> { /* private fields */ }

Trait Implementations

impl<Key, ValBuild, ValProbe> Clear for HalfMultisetJoinState<Key, ValBuild, ValProbe>

fn clear(&mut self)

Clears the collection without neccesarily freeing allocations.

impl<Key: Debug, ValBuild: Debug, ValProbe: Debug> Debug for HalfMultisetJoinState<Key, ValBuild, ValProbe>

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

Formats the value using the given formatter.

impl<Key, ValBuild, ValProbe> Default for HalfMultisetJoinState<Key, ValBuild, ValProbe>

fn default() -> Self

Returns the “default value” for a type.

impl<Key, ValBuild, ValProbe> HalfJoinState<Key, ValBuild, ValProbe> for HalfMultisetJoinState<Key, ValBuild, ValProbe>

where Key: Clone + Eq + Hash, ValBuild: Clone, ValProbe: Clone,

fn build(&mut self, k: Key, v: &ValBuild) -> bool

Insert a key value pair into the join state, currently this is always inserting into a hash table If the key-value pair exists then it is implementation defined what happens, usually either two copies are stored or only one copy is stored.

fn probe(&mut self, k: &Key, v: &ValProbe) -> Option<(Key, ValProbe, ValBuild)>

This function does the actual joining part of the join. It looks up a key in the local join state and creates matches The first match is return directly to the caller, and any additional matches are stored internally to be retrieved later with pop_match

fn full_probe(&self, k: &Key) -> Iter<'_, ValBuild>

fn pop_match(&mut self) -> Option<(Key, ValProbe, ValBuild)>

If there are any stored matches from previous calls to probe then this function will remove them one at a time and return it.

fn len(&self) -> usize

fn iter(&self) -> Iter<'_, Key, SmallVec<[ValBuild; 1]>>

fn is_empty(&self) -> bool