mihaibudiu commented on code in PR #4406:
URL: https://github.com/apache/calcite/pull/4406#discussion_r2128160099


##########
core/src/main/java/org/apache/calcite/sql/dialect/PrestoSqlDialect.java:
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@@ -248,10 +278,12 @@ public static void unparseMapValue(SqlWriter writer, 
SqlCall call,
    */
   public static SqlCall convertMapValueCall(SqlCall call) {
     boolean unnestMap = call.operandCount() > 0
-        && call.getOperandList().stream().allMatch(operand -> operand 
instanceof SqlLiteral);
+        && (call.getOperandList().get(0) instanceof SqlLiteral

Review Comment:
   what is the relation between this change and the issue that is being solved?
   



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