pub const NESTED_LOOP_JOIN_INNER_U32_1KEY_PAIRS: &str = "nested_loop_join_inner_u32_1key_pairs";Expand description
Nested-loop inner join (emit-pairs design). Reads
the single key column from each side; emits matched
(left_idx, right_idx) pairs as two parallel u32 arrays.
Payload columns are materialized after the kernel via
gather_buffer_by_indices in the provider fn.