Module nested_loop_join 

NestedLoopJoinExec: joins without equijoin (equality predicates).

Structs

JoinLeftData 🔒

Left (build-side) data

NestedLoopJoinExec

NestedLoopJoinExec is a build-probe join operator designed for joins that do not have equijoin keys in their ON clause.

NestedLoopJoinMetrics 🔒

NestedLoopJoinStream 🔒

Enums

NLJState 🔒

States for join processing. See poll_next() comment for more details about state transitions.

Functions

apply_filter_to_row_join_batch 🔒

Apply the join filter between: (l_index th row in left buffer) x (right batch) Returns a bitmap, with successfully joined indices set to true

build_row_join_batch 🔒

This function performs the following steps:

build_unmatched_batch 🔒

Example:

build_unmatched_batch_empty_schema 🔒

Special case for PlaceHolderRowExec Minimal example: SELECT 1 WHERE EXISTS (SELECT 1);

collect_left_input 🔒

Asynchronously collect input into a single batch, and creates JoinLeftData from it

create_record_batch_with_empty_schema 🔒

Creates an empty RecordBatch with a specific row count. This is useful for cases where we need a batch with the correct schema and row count but no actual data columns (e.g., for constant filters).