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[cdc] Avoid sending empty schema change events to Schema Evolution #7261

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Merged
JingsongLi merged 1 commit into from
Feb 11, 2026
+14 −14
Merged

[cdc] Avoid sending empty schema change events to Schema Evolution #7261

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28 changes: 14 additions & 14 deletions ...link/paimon-flink-cdc/src/main/java/org/apache/paimon/flink/sink/cdc/RichEventParser.java
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Original file line number Diff line number Diff line change
Expand Up @@ -42,25 +42,25 @@ public void setRawEvent(RichCdcRecord rawEvent) {
public CdcSchema parseSchemaChange() {
CdcSchema.Builder change = CdcSchema.newBuilder();
CdcSchema recordedSchema = record.cdcSchema();
recordedSchema
.fields()
.forEach(
dataField -> {
DataField previous = previousDataFields.get(dataField.name());
// When the order of the same field is different, its ID may also be
// different,
// so the comparison should not include the ID.
if (!DataField.dataFieldEqualsIgnoreId(previous, dataField)) {
previousDataFields.put(dataField.name(), dataField);
change.column(dataField);
}
});
boolean hasChange = false;

for (DataField dataField : recordedSchema.fields()) {
DataField previous = previousDataFields.get(dataField.name());
// When the order of the same field is different, its ID may also be different,
// so the comparison should not include the ID.
if (!DataField.dataFieldEqualsIgnoreId(previous, dataField)) {
previousDataFields.put(dataField.name(), dataField);
change.column(dataField);
hasChange = true;
}
}

if (recordedSchema.comment() != null && !recordedSchema.comment().equals(previousComment)) {
previousComment = recordedSchema.comment();
change.comment(recordedSchema.comment());
hasChange = true;
}
return change.build();
return hasChange ? change.build() : null;
}

@Override
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