cloud-fan commented on code in PR #45134:
URL: https://github.com/apache/spark/pull/45134#discussion_r1492014338
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/RewriteWithExpression.scala:
##########
@@ -41,10 +41,15 @@ object RewriteWithExpression extends Rule[LogicalPlan] {
rewriteWithExprAndInputPlans(expr, inputPlans)
}
newPlan = newPlan.withNewChildren(inputPlans.toIndexedSeq)
- if (p.output == newPlan.output) {
- newPlan
- } else {
+ // Since we add extra Projects with extra columns to pre-evaluate the
common expressions,
+ // the current operator may have extra columns if it inherits the
output columns from its
+ // child, and we need to project away the extra columns to keep the
plan schema unchanged.
Review Comment:
not related to this PR but refine the code here since I'm touching this rule.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
