Module agg 

Aggregate function analysis helpers.

Provides structured types and extraction functions for aggregate expressions found in SQL SELECT projections. The types here complement the string-based aggregates: Vec<String> stored in crate::LogicalPlan::Aggregate by giving callers a richer, typed view of the aggregate expressions.

Structs

AggregateExpr

Named aggregate function with an output alias.

Enums

AggFunc

Aggregate function variant.

Functions

extract_aggregates

Extract aggregate expressions from a sqlparser SELECT item list.

is_aggregate_expr

Check if a sqlparser Expr is (or contains) an aggregate function call.