yegangy0718 commented on code in PR #7493:
URL: https://github.com/apache/iceberg/pull/7493#discussion_r1182788479


##########
flink/v1.17/flink/src/main/java/org/apache/iceberg/flink/data/RowDataProjection.java:
##########
@@ -254,4 +258,78 @@ public MapData getMap(int pos) {
   public RowData getRow(int pos, int numFields) {
     return (RowData) getValue(pos);
   }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+
+    if (!(o instanceof RowDataProjection)) {
+      return false;
+    }
+
+    RowDataProjection that = (RowDataProjection) o;
+    return deepEquals(that);

Review Comment:
   NVM. When `o == null`, `(o instanceof RowDataProjection)` = false, at line 
268, it will return false directly. 



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