HyukjinKwon commented on code in PR #42398:
URL: https://github.com/apache/spark/pull/42398#discussion_r1287909249
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sql/core/src/main/scala/org/apache/spark/sql/functions.scala:
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@@ -1148,6 +1148,60 @@ object functions {
*/
def sum_distinct(e: Column): Column = withAggregateFunction(Sum(e.expr),
isDistinct = true)
+ /**
+ * Aggregate function: returns the concatenated input values.
+ *
+ * @group agg_funcs
+ * @since 4.0.0
+ */
+ def listagg(e: Column): Column = withAggregateFunction {
+ ListAgg(e.expr)
+ }
+
+ /**
+ * Aggregate function: returns the concatenated input values.
+ *
+ * @group agg_funcs
+ * @since 4.0.0
+ */
+ def listagg(columnName: String): Column = listagg(Column(columnName))
+
+ /**
+ * Aggregate function: returns the concatenated input values, separated by
the delimiter string.
+ *
+ * @group agg_funcs
+ * @since 4.0.0
+ */
+ def listagg(e: Column, delimiter: String): Column = withAggregateFunction {
Review Comment:
Expose `Column` signature only (see the top of this file)
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