JingGe commented on code in PR #23033:
URL: https://github.com/apache/flink/pull/23033#discussion_r1270102534


##########
flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/sources/tsextractors/ExistingField.java:
##########
@@ -42,7 +42,12 @@
 /**
  * Converts an existing {@link Long}, {@link java.sql.Timestamp}, or timestamp 
formatted
  * java.lang.String field (e.g., "2018-05-28 12:34:56.000") into a rowtime 
attribute.
+ *
+ * @deprecated This class will not be supported in the new source design 
around {@link
+ *     org.apache.flink.table.connector.source.DynamicTableSource}. See 
FLIP-95 for more
+ *     information.
  */
+@Deprecated
 @PublicEvolving
 public final class ExistingField extends TimestampExtractor {

Review Comment:
   It is used at [1] which turns out that 
StreamSQLTestProgram.GeneratorTableSource should be replaced with the new 
design. Does it make sense to do it within this PR?
   
   [1] 
https://github.com/apache/flink/blob/d6967dd7301e82fa102f756e16635dabce1c550d/flink-end-to-end-tests/flink-stream-sql-test/src/main/java/org/apache/flink/sql/tests/StreamSQLTestProgram.java#L236



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