Function datafusion_common::get_required_group_by_exprs_indices

source · 
pub fn get_required_group_by_exprs_indices(
    schema: &DFSchema,
    group_by_expr_names: &[String]
) -> Option<Vec<usize>>
Expand description

Returns indices for the minimal subset of GROUP BY expressions that are functionally equivalent to the original set of GROUP BY expressions.