Github user JDrit commented on a diff in the pull request:
https://github.com/apache/spark/pull/7606#discussion_r35293085
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -1720,4 +1720,11 @@ object functions {
UnresolvedFunction(udfName, cols.map(_.expr))
}
+ /**
+ * Parses the comma separated expression strings into the columns they
represent, similar to
+ * DataFrame.selectExpr
+ *
+ * @group normal_funcs
+ */
+ def expr(expr: String): Column = Column(new
SqlParser().parseExpression(expr))
--- End diff --
I moved it up to right above the math functions.
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