mustafasrepo commented on code in PR #6482: URL: https://github.com/apache/arrow-datafusion/pull/6482#discussion_r1212968791
########## datafusion/core/tests/sqllogictests/test_files/groupby.slt: ########## @@ -2384,3 +2384,197 @@ SELECT s.country, ARRAY_AGG(s.amount ORDER BY s.country DESC, s.amount DESC) AS FRA [200.0, 50.0] 250 GRC [80.0, 30.0] 110 TUR [100.0, 75.0] 175 + +# test_reverse_aggregate_expr +# Some of the Aggregators can be reversed, by this way we can still run aggregators +# that have contradictory requirements at first glance. +query TT +EXPLAIN SELECT country, ARRAY_AGG(amount ORDER BY amount DESC) AS amounts, + FIRST_VALUE(amount ORDER BY amount ASC) AS fv1, + LAST_VALUE(amount ORDER BY amount DESC) AS fv2 + FROM sales_global + GROUP BY country +---- +logical_plan +Projection: sales_global.country, ARRAY_AGG(sales_global.amount) ORDER BY [sales_global.amount DESC NULLS FIRST] AS amounts, FIRST_VALUE(sales_global.amount) ORDER BY [sales_global.amount ASC NULLS LAST] AS fv1, LAST_VALUE(sales_global.amount) ORDER BY [sales_global.amount DESC NULLS FIRST] AS fv2 +--Aggregate: groupBy=[[sales_global.country]], aggr=[[ARRAY_AGG(sales_global.amount) ORDER BY [sales_global.amount DESC NULLS FIRST], FIRST_VALUE(sales_global.amount) ORDER BY [sales_global.amount ASC NULLS LAST], LAST_VALUE(sales_global.amount) ORDER BY [sales_global.amount DESC NULLS FIRST]]] +----TableScan: sales_global projection=[country, amount] +physical_plan +ProjectionExec: expr=[country@0 as country, ARRAY_AGG(sales_global.amount) ORDER BY [sales_global.amount DESC NULLS FIRST]@1 as amounts, FIRST_VALUE(sales_global.amount) ORDER BY [sales_global.amount ASC NULLS LAST]@2 as fv1, LAST_VALUE(sales_global.amount) ORDER BY [sales_global.amount DESC NULLS FIRST]@3 as fv2] +--AggregateExec: mode=Single, gby=[country@0 as country], aggr=[ARRAY_AGG(sales_global.amount), FIRST_VALUE(sales_global.amount), LAST_VALUE(sales_global.amount)] Review Comment: `AggregateExpr` has a `fn name(&self) -> &str` method. This method returns string representation of the expression. This is given during initialization from outside(It is not calculated according to function and arguments). During reversal we use the name as is. However, it is misleading, as you observed (even though behind the scene appropriate version is working). However, I couldn't find an easy fix for this problem -- 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...@arrow.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
