Struct JoinEngine

pub struct JoinEngine<'a, TIndex: Serialize + Hash + Clone + Eq + Ord> {
    pub idx_this: &'a HashableIndex<TIndex>,
    pub idx_other: &'a HashableIndex<TIndex>,
}

JoinEngine is responsible for join logic, it consists of two indicies. idx_this is the LHS and idx_other is the RHS. Indicies are passed by reference

Fields

idx_this: &'a HashableIndex<TIndex>

idx_other: &'a HashableIndex<TIndex>

Implementations

impl<'a, TIndex: Serialize + Hash + Clone + Eq + Ord> JoinEngine<'a, TIndex>

pub fn get_inner_hash_joined_indicies(&self) -> Vec<IndexJoinPair>

Hash inner join

pub fn get_left_hash_joined_indicies( &self, ) -> Vec<IndexJoinPotentiallyUnmatchedPair>

Hash join left. All left values are joined so no Option on the base index

pub fn get_left_merge_joined_indicies( &self, ) -> Vec<IndexJoinPotentiallyUnmatchedPair>

Left Merge Join

pub fn get_inner_merge_joined_indicies(&self) -> Vec<IndexJoinPair>

merge sort join join a and b.

pub fn get_asof_merge_joined_indicies( &self, compare_func: Option<Box<dyn Fn(&TIndex, &TIndex, &TIndex) -> (Ordering, i64)>>, other_idx_func: Option<Box<dyn Fn(usize) -> usize>>, ) -> Vec<IndexJoinPotentiallyUnmatchedPair>

as of join. this is a variation of merge join that allows for indicies to be equal based on a custom comperator func