Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/15877#discussion_r88157361
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -182,6 +182,36 @@ object functions {
//////////////////////////////////////////////////////////////////////////////////////////////
/**
+ * Aggregate function: returns a count-min sketch of a column.
+ *
+ * @param eps relative error, must be positive
+ * @param confidence confidence, must be positive and less than 1.0
+ * @param seed random seed
+ *
+ * @group agg_funcs
+ * @since 2.2.0
+ */
+ def count_min_sketch(e: Column, eps: Double, confidence: Double, seed:
Int): Column = {
--- End diff --
let's not add these for now.
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