maropu commented on a change in pull request #26808: [SPARK-30184][SQL]
Implement a helper method for aliasing functions
URL: https://github.com/apache/spark/pull/26808#discussion_r356906930
##########
File path:
sql/core/src/test/resources/sql-tests/results/udf/postgreSQL/udf-aggregates_part1.sql.out
##########
@@ -101,7 +101,7 @@ struct<var_pop(CAST(CAST(udf(cast(b as string)) AS FLOAT)
AS DOUBLE)):double>
-- !query 12
SELECT udf(var_samp(b)) FROM aggtest
-- !query 12 schema
-struct<CAST(udf(cast(var_samp(cast(b as double)) as string)) AS DOUBLE):double>
+struct<CAST(udf(cast(var_samp(var_samp, cast(b as double)) as string)) AS
DOUBLE):double>
Review comment:
It seems `bool_and/or` has the similar issue;
```
scala> sql("select bool_and(a) from values (true), (true), (false)
t(a)").explain(true)
== Analyzed Logical Plan ==
bool_and(a): boolean
Aggregate [bool_and(bool_and, a#12) AS bool_and(a)#14]
^^^^^^^^^^^^^^^^^^^
+- SubqueryAlias `t`
+- LocalRelation [a#12]
```
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