pvary commented on code in PR #14729:
URL: https://github.com/apache/iceberg/pull/14729#discussion_r2588930535


##########
flink/v2.1/flink/src/main/java/org/apache/iceberg/flink/sink/dynamic/DynamicIcebergSink.java:
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@@ -336,6 +337,15 @@ public Builder<T> inputSchemasPerTableCacheMaxSize(int 
inputSchemasPerTableCache
       return this;
     }
 
+    /**
+     * Set whether schema field name matching should be case-sensitive. The 
default is to match the
+     * field names case-sensitive.
+     */
+    public Builder<T> caseSensitive(boolean newCaseSensitive) {

Review Comment:
   If we have a key which case sensitive, then this is making assumptions.
   If we have a key which is case insensitive, then this is making assumptions.
   
   In cache, we are fine if we are insensitive - we are just adding more items 
to the cache.
   During the commit retries, if we have 2 sets for a single table (upper case 
and lower case), then we will not commit the 2nd set as the 
lastCommittedCheckpointId is already increased when the 1st set was committed



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