jayzhan211 commented on code in PR #10560: URL: https://github.com/apache/datafusion/pull/10560#discussion_r1631125762
########## datafusion/functions-aggregate/src/first_last.rs: ########## @@ -31,20 +31,28 @@ use datafusion_common::{ use datafusion_expr::function::{AccumulatorArgs, StateFieldsArgs}; use datafusion_expr::utils::{format_state_name, AggregateOrderSensitivity}; use datafusion_expr::{ - Accumulator, AggregateUDFImpl, ArrayFunctionSignature, Signature, TypeSignature, - Volatility, + Accumulator, AggregateExt, AggregateUDFImpl, ArrayFunctionSignature, Expr, Signature, + TypeSignature, Volatility, }; use datafusion_physical_expr_common::aggregate::utils::get_sort_options; use datafusion_physical_expr_common::sort_expr::{ limited_convert_logical_sort_exprs_to_physical, LexOrdering, PhysicalSortExpr, }; -make_udaf_expr_and_func!( - FirstValue, - first_value, - "Returns the first value in a group of values.", - first_value_udaf -); +create_func!(FirstValue, first_value_udaf); + +/// Returns the first value in a group of values. +pub fn first_value(expression: Expr, order_by: Option<Vec<Expr>>) -> Expr { + if let Some(order_by) = order_by { + first_value_udaf() + .call(vec![expression]) + .order_by(order_by) + .build() + .unwrap() Review Comment: I think it is fine to unwrap since udaf.call() is guaranteed to be Expr::AggregateFunction -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org