Function polars::prelude::private_left_join_multiple_keys

pub fn private_left_join_multiple_keys(
    a: &DataFrame,
    b: &DataFrame,
    join_nulls: bool
) -> Result<(Either<Vec<u32>, Vec<ChunkId>>, Either<Vec<NullableIdxSize>, Vec<ChunkId>>), PolarsError>

Available on crate feature polars-ops only.