tanclary commented on code in PR #3423:
URL: https://github.com/apache/calcite/pull/3423#discussion_r1326360474


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core/src/main/java/org/apache/calcite/sql/fun/SqlItemOperator.java:
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@@ -78,7 +78,13 @@ public SqlItemOperator(String name,
       SqlWriter writer, SqlCall call, int leftPrec, int rightPrec) {
     call.operand(0).unparse(writer, leftPrec, 0);
     final SqlWriter.Frame frame = writer.startList("[", "]");
-    call.operand(1).unparse(writer, 0, 0);
+    if (offset == 0) {

Review Comment:
   Each dialect has a file like `BigQuerySqlDialect` and most have an 
"unparseCall" override with a switch statement that specifies certain `SqlKind` 
or `SqlOperator` that require special unparsing.



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