check_arg_count

datafusion_expr::type_coercion::aggregates

Function check_arg_count 

pub fn check_arg_count(
    func_name: &str,
    input_fields: &[Arc<Field>],
    signature: &TypeSignature,
) -> Result<(), DataFusionError>
Expand description

Validate the length of input_fields matches the signature for agg_fun.

This method DOES NOT validate the argument fields - only that (at least one, in the case of TypeSignature::OneOf) signature matches the desired number of input types.