skambha commented on a change in pull request #24593: [SPARK-27692][SQL] Add
new optimizer rule to evaluate the deterministic scala udf only once if all
inputs are literals
URL: https://github.com/apache/spark/pull/24593#discussion_r285752745
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
##########
@@ -1719,3 +1720,20 @@ object OptimizeLimitZero extends Rule[LogicalPlan] {
empty(ll)
}
}
+
+/**
+ * If the UDF is deterministic and if the children are all literal, we can
replace the udf
+ * with the output of the udf serialized
+ */
+object DeterministicLiteralUDF extends Rule[LogicalPlan] {
Review comment:
Thanks @dongjoon-hyun for the comment. Sure will take a look.
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