Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/22326#discussion_r220436485
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -1308,6 +1312,16 @@ object CheckCartesianProducts extends
Rule[LogicalPlan] with PredicateHelper {
if (SQLConf.get.crossJoinEnabled) {
plan
} else plan transform {
+ case j @ Join(_, _, _, condition)
+ if condition.isDefined &&
PullOutPythonUDFInJoinCondition.hasPythonUDF(condition.get) =>
+ // if the crossJoinEnabled is false, a RuntimeException will be
thrown later while
+ // the PythonUDF need to access both side of join, we throw
firstly here for better
+ // readable information.
+ throw new AnalysisException(s"Detected the join
condition:${j.condition} of this join " +
--- End diff --
when will we hit it? If the python udf can't be pulled out because of join
type problems, we already throw exception at `PullOutPythonUDFInJoinCondition`.
Did I miss something?
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