Github user rxin commented on a diff in the pull request: https://github.com/apache/spark/pull/21054#discussion_r187751801 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala --- @@ -775,6 +775,178 @@ object functions { */ def var_pop(columnName: String): Column = var_pop(Column(columnName)) + /** + * Aggregate function: returns the number of non-null pairs. + * + * @group agg_funcs + * @since 2.4.0 + */ + def regr_count(y: Column, x: Column): Column = withAggregateFunction { --- End diff -- do we need all of these? seems like users can just invoke expr to do them. this file is getting very long.
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