Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/6718#discussion_r32090941
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -122,7 +122,7 @@ object functions {
* @group agg_funcs
* @since 1.3.0
*/
- def sum(e: Column): Column = Sum(e.expr)
+ def sum(a: Column): Column = Sum(a.expr)
--- End diff --
actually after thinking about it more ... this breaks scala source
compatibility. Do you mind switching back to "e" and just use "e" for
everything? It might've meant "expression".
For the new ones, I'd use "expr".
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