slinkydeveloper commented on a change in pull request #18582:
URL: https://github.com/apache/flink/pull/18582#discussion_r797376158



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File path: 
flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/functions/casting/CastRuleUtils.java
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@@ -43,6 +43,10 @@ static String nullLiteral(boolean legacyBehaviour) {
         return legacyBehaviour ? strLiteral("null") : strLiteral("NULL");
     }
 
+    static String operator(String operator, Object argLeft, Object argRight) {

Review comment:
       Can we use "left", "operator", "right" rather than the prefix?




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