twalthr commented on code in PR #19543:
URL: https://github.com/apache/flink/pull/19543#discussion_r857365655
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flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/planner/codegen/ExprCodeGenerator.scala:
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@@ -351,6 +351,15 @@ class ExprCodeGenerator(ctx: CodeGeneratorContext,
nullableInput: Boolean)
}
override def visitInputRef(inputRef: RexInputRef): GeneratedExpression = {
+ // for specific custom code generation
+ if (input1Type == null) {
Review Comment:
This is a bit hacky but safe enough. The code generator is very generic with
a couple of corner cases for various purposes.
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