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[Bug] Fix debezium-json cannot infer primary keys from standard Debezium message key #9495

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Merged
JingsongLi merged 1 commit into from
Sep 2, 2026
Merged

[Bug] Fix debezium-json cannot infer primary keys from standard Debezium message key #9495

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26 changes: 26 additions & 0 deletions ...java/org/apache/paimon/flink/action/cdc/format/debezium/DebeziumJsonRecordParserTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,32 @@ public void testEmptyPrimaryKeysFallBackToKey() throws Exception {
assertPrimaryKeys(key, value("[]"), "id");
}

@Test
public void testPrimaryKeysFromValueWithSchemaEnvelope() throws Exception {
// Simulates the exact scenario from issue #8961:
// Value has schema+payload envelope (standard Debezium JSON),
// and primary keys come from the Kafka message key.
JsonNode key =
OBJECT_MAPPER.readTree(
"{\"schema\":{\"type\":\"struct\",\"fields\":["
+ "{\"type\":\"int64\",\"optional\":false,\"field\":\"id\"}]},"
+ "\"payload\":{\"id\":1}}");

JsonNode value =
OBJECT_MAPPER.readTree(
"{\"schema\":{\"type\":\"struct\",\"fields\":["
+ "{\"type\":\"struct\",\"fields\":["
+ "{\"type\":\"int64\",\"optional\":false,\"field\":\"id\"},"
+ "{\"type\":\"string\",\"optional\":true,\"field\":\"name\"}],"
+ "\"optional\":true,\"field\":\"after\"}],"
+ "\"optional\":false},\"payload\":{\"before\":null,"
+ "\"after\":{\"id\":1,\"name\":\"Alice\"},"
+ "\"source\":{\"db\":\"test\",\"table\":\"users\"},"
+ "\"op\":\"c\"}}");

assertPrimaryKeys(key, value, "id");
}

private static JsonNode value(String primaryKeys) throws Exception {
String primaryKeyField = primaryKeys == null ? "" : "\"pkNames\":" + primaryKeys + ",";
return OBJECT_MAPPER.readTree(
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