snuyanzin commented on code in PR #28113:
URL: https://github.com/apache/flink/pull/28113#discussion_r3196430198
##########
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/planner/codegen/CodeGeneratorContext.scala:
##########
@@ -116,6 +115,24 @@ class CodeGeneratorContext(
val reusableInputUnboxingExprs: mutable.Map[(String, Int),
GeneratedExpression] =
mutable.Map[(String, Int), GeneratedExpression]()
+ // map of expressions for shared RexProgram exprList entries that will be
added only once
+ // exprList index -> expr
+ val reusableLocalRefExprs: mutable.LinkedHashMap[Int, GeneratedExpression] =
+ mutable.LinkedHashMap[Int, GeneratedExpression]()
+
+ // Stack of RexLocalRef cache scopes. The bottom scope IS
reusableLocalRefExprs and is read
Review Comment:
added example
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