snuyanzin commented on code in PR #18604:
URL: https://github.com/apache/flink/pull/18604#discussion_r843885301


##########
flink-connectors/flink-connector-jdbc/src/main/java/org/apache/flink/connector/jdbc/internal/converter/PostgresRowConverter.java:
##########
@@ -91,7 +91,10 @@ private JdbcDeserializationConverter 
createPostgresArrayConverter(ArrayType arra
                 final Object[] array = (Object[]) 
Array.newInstance(elementClass, in.length);
                 for (int i = 0; i < in.length; i++) {
                     array[i] =
-                            elementConverter.deserialize(((PGobject) 
in[i]).getValue().getBytes());
+                            elementConverter.deserialize(
+                                    in[i] instanceof byte[]
+                                            ? in[i]
+                                            : ((PGobject) 
in[i]).getValue().getBytes());

Review Comment:
   I'm not sure... may be I didn't get your point about test for byte[]. 
   Could you elaborate please here?
   
   I'm asking because there is already an existing test for that (and it also 
starts failing after update only pgjdbc version without other code changes)
   ```java
   .column("bytea_arr", DataTypes.ARRAY(DataTypes.BYTES()))
   ...
   + "bytea_arr bytea[], "
   ...
     + "'{2,3,4}',"
   ```
   at 
https://github.com/apache/flink/blob/99c0438253efaf0a9626a807ce2b882402a367d1/flink-connectors/flink-connector-jdbc/src/test/java/org/apache/flink/connector/jdbc/catalog/PostgresCatalogTestBase.java#L277



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