build_unmatched_batch_empty_schema

datafusion_physical_plan::joins::nested_loop_join

Function build_unmatched_batch_empty_schema 

Source 
fn build_unmatched_batch_empty_schema(
    output_schema: SchemaRef,
    batch_bitmap: &BooleanArray,
    join_type: JoinType,
) -> Result<Option<RecordBatch>>
Expand description

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

§Return

If Some, that’s the result batch If None, it’s not for this special case. Continue execution.