Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/22227#discussion_r212782576
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -2554,7 +2554,27 @@ object functions {
* @since 1.5.0
*/
def split(str: Column, pattern: String): Column = withExpr {
- StringSplit(str.expr, lit(pattern).expr)
+ StringSplit(str.expr, lit(pattern).expr, lit(-1).expr)
+ }
+
+ /**
+ * Splits str around pattern (pattern is a regular expression) up to
`limit-1` times.
--- End diff --
Drop `up to `limit-1` times` in the first line? That's because the
behaviour depends on values described below.
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