[GitHub] tragicjun commented on a change in pull request #6495: [FLINK-10061] [table] [kafka] Fix unsupported reconfiguration in KafkaTableSink

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tragicjun commented on a change in pull request #6495: [FLINK-10061] [table] [kafka] Fix unsupported reconfiguration in KafkaTableSink
URL: https://github.com/apache/flink/pull/6495#discussion_r207876429
 
 

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 File path: flink-connectors/flink-connector-kafka-base/src/main/java/org/apache/flink/streaming/connectors/kafka/KafkaTableSink.java
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 @@ -166,8 +167,17 @@ public void emitDataStream(DataStream<Row> dataStream) {
 	@Override
 	public KafkaTableSink configure(String[] fieldNames, TypeInformation<?>[] fieldTypes) {
 		if (schema.isPresent()) {
-			// a fixed schema is defined so reconfiguration is not supported
-			throw new UnsupportedOperationException("Reconfiguration of this sink is not supported.");
+			if (getFieldTypes().length != fieldTypes.length || !Arrays.deepEquals(getFieldTypes(), fieldTypes)) {
+				String fixedFieldTypes = Arrays.deepToString(Arrays.stream(getFieldTypes())
+						.map(s -> s.getTypeClass().getSimpleName()).toArray());
 
 Review comment:
   The if statement uses `Arrays.deepEquals()` which is a clean way of comparing arrays. The `Arrays.deepToString()` is just used to build string representation of fieldTypes that are reflected in the exception message. Perhaps the code employs too many **Arrays**, please review it a bit closer :) 

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