VinaySagarGonabavi commented on code in PR #4279:
URL: https://github.com/apache/flink-cdc/pull/4279#discussion_r2921458838
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flink-cdc-runtime/src/test/java/org/apache/flink/cdc/runtime/operators/transform/TransformOperatorWithSchemaEvolveTest.java:
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@@ -840,6 +840,262 @@ void testSchemaChangeWithPostWildcard() throws Exception {
.runTests("inserting columns at last");
}
+ /**
+ * Tests duplicate AddColumnEvent handling with a wildcard projection
({@code *, id + age as
+ * computed}) and a filter ({@code name <> 'Alice'}). This exercises the
full pre+post pipeline
+ * with a wildcard rule: the first AddColumnEvent for "extras" passes
through both operators,
+ * while the duplicate is filtered by PreTransformOperator (which also
prevents it from reaching
+ * PostTransformOperator). A subsequent DataChangeEvent verifies the
pipeline remains functional
+ * after duplicate filtering, with the computed column correctly evaluated.
+ */
+ @Test
+ void testDuplicateAddColumnEventPreTransform() throws Exception {
Review Comment:
New ITCase is added
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