Function get_aggregate_expr_req 

fn get_aggregate_expr_req(
    aggr_expr: &AggregateFunctionExpr,
    group_by: &PhysicalGroupBy,
    agg_mode: &AggregateMode,
    include_soft_requirement: bool,
) -> Option<LexOrdering>

Determines the lexical ordering requirement for an aggregate expression.

Parameters

• aggr_expr: A reference to an AggregateFunctionExpr representing the aggregate expression.
• group_by: A reference to a PhysicalGroupBy instance representing the physical GROUP BY expression.
• agg_mode: A reference to an AggregateMode instance representing the mode of aggregation.
• include_soft_requirement: When false, only hard requirements are considered, as indicated by AggregateFunctionExpr::order_sensitivity returning AggregateOrderSensitivity::HardRequirement. Otherwise, also soft requirements (AggregateOrderSensitivity::SoftRequirement) are considered.

Returns

A LexOrdering instance indicating the lexical ordering requirement for the aggregate expression.