robertwb commented on code in PR #29160:
URL: https://github.com/apache/beam/pull/29160#discussion_r1378275236
##########
sdks/java/io/kafka/src/main/java/org/apache/beam/sdk/io/kafka/KafkaWriteSchemaTransformProvider.java:
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@@ -131,10 +132,18 @@ public void finish() {
@Override
public PCollectionRowTuple expand(PCollectionRowTuple input) {
Schema inputSchema = input.get("input").getSchema();
- final SerializableFunction<Row, byte[]> toBytesFn =
- configuration.getFormat().equals("JSON")
- ? JsonUtils.getRowToJsonBytesFunction(inputSchema)
- : AvroUtils.getRowToAvroBytesFunction(inputSchema);
+ final SerializableFunction<Row, byte[]> toBytesFn;
+ if (configuration.getFormat().equals("RAW")) {
+ int numFields = inputSchema.getFields().size();
+ if (numFields != 1) {
Review Comment:
We can do this as a follow-up.
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