kbendick commented on code in PR #4670:
URL: https://github.com/apache/iceberg/pull/4670#discussion_r862022605


##########
flink/v1.13/flink/src/main/java/org/apache/iceberg/flink/FlinkDynamicTableFactory.java:
##########
@@ -71,6 +72,12 @@ public class FlinkDynamicTableFactory implements 
DynamicTableSinkFactory, Dynami
           .noDefaultValue()
           .withDescription("Table name managed in the underlying iceberg 
catalog and database.");
 
+  private static final ConfigOption<Boolean> WRITE_UPSERT_ENABLED =
+      ConfigOptions.key("write-upsert-enabled")
+          .booleanType()
+          .defaultValue(false)
+          .withDescription("Whether to transform all INSERT/UPDATE_AFTER 
events to UPSERT.");
+
   // Flink 1.13.x change the return type from CatalogTable interface to 
ResolvedCatalogTable which extends the
   // CatalogTable. Here we use the dynamic method loading approach to avoid 
adding explicit CatalogTable or
   // ResolvedCatalogTable class into the iceberg-flink-runtime jar for 
compatibility purpose.

Review Comment:
   Unrelated, but this dynamic function call can probably be removed now that 
we have code per major Flink version (unless this change was made in a patch 
release after 1.13.0).
   
   I think @hililiwei has a PR that removes it iirc, but that PR also tackles 
much larger issues. @hililiwei can you possibly open a PR to just update the 
no-longer needed dynamic `getCatalogTable` call? I tried looking for the PR but 
couldn't find it.



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