Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/18106#discussion_r123753748
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/misc.scala
---
@@ -132,3 +133,154 @@ case class Uuid() extends LeafExpression {
s"UTF8String.fromString(java.util.UUID.randomUUID().toString());",
isNull = "false")
}
}
+
+/**
+ * Returns date truncated to the unit specified by the format or
+ * numeric truncated to scale decimal places.
+ */
+// scalastyle:off line.size.limit
+@ExpressionDescription(
+ usage = """
+ _FUNC_(data[, fmt]) - Returns `data` truncated by the format model
`fmt`.
--- End diff --
fmt -> expr?
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