expected_expr_positions

datafusion_physical_optimizer::enforce_distribution

Function expected_expr_positions 

Source 
fn expected_expr_positions(
    current: &[Arc<dyn PhysicalExpr>],
    expected: &[Arc<dyn PhysicalExpr>],
) -> Option<Vec<usize>>
Expand description

Return the expected expressions positions. For example, the current expressions are [‘c’, ‘a’, ‘a’, b’], the expected expressions are [‘b’, ‘c’, ‘a’, ‘a’],

This method will return a Vec [3, 0, 1, 2]