SteNicholas commented on a change in pull request #16142:
URL: https://github.com/apache/flink/pull/16142#discussion_r657941735



##########
File path: 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/table/KafkaOptions.java
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@@ -144,7 +144,7 @@ private KafkaOptions() {}
                     .noDefaultValue()
                     .withDescription(
                             "Topic names from which the table is read. Either 
'topic' or 'topic-pattern' must be set for source. "
-                                    + "Option 'topic' is required for sink.");
+                                    + "Option 'topic' is optional for sink 
through specifying the 'topic' metadata column.");

Review comment:
       @twalthr , this is originally different from the doc. Please check 
again. 




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