Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/10745#discussion_r49681267
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -1063,7 +1063,7 @@ object functions extends LegacyFunctions {
*
* @group normal_funcs
*/
- def expr(expr: String): Column = Column(SqlParser.parseExpression(expr))
+ def expr(expr: String): Column = Column(CatalystQl.parseExpression(expr))
--- End diff --
If we do that, we should make sure we have a default one when there is no
active context.
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