Github user jaceklaskowski commented on a diff in the pull request:
https://github.com/apache/spark/pull/14435#discussion_r73332522
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala
---
@@ -53,6 +53,40 @@ case class Project(projectList: Seq[NamedExpression],
child: LogicalPlan) extend
override def validConstraints: Set[Expression] =
child.constraints.union(getAliasedConstraints(projectList))
+
+ override def sql: String = {
+ if (projectList.exists(expr => expr.find(e =>
e.isInstanceOf[NonSQLExpression]).isDefined)) {
--- End diff --
This `if` is overly complex and forces a reader to read the expression
inside-out (not left to right).
I can't propose anything better than beg for a boolean val with the entire
boolean condition on a separate line.
WDYT?
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