Hi all, I have noticed that for example, for SqlExplain SqlSpecialOperator.createCall [1] method is overridden but for SqlInsert [2] it is not. Thus in case with SqlExplain OPERATOR createCall returns SqlCall instance that can be cast to SqlExplain but in case of SqlInsert createCall returns SqlCall that can be cast only to SqlBasicCall (and I can't take advantage of SqlInsert methods).
So I wanted to ask is there is any particular reason why some nodes do have createCall method overridden and some don't? And in case of SqlInsert should it be fixed or not? [1] https://github.com/apache/calcite/blob/92b3d381de4c0f6670cff06d54ce06b8231e6684/core/src/main/java/org/apache/calcite/sql/SqlExplain.java#L31 [2] https://github.com/apache/calcite/blob/02752fe78f817ed317b8873d2f4c7b79bfe8b9b5/core/src/main/java/org/apache/calcite/sql/SqlInsert.java#L31 Kind regards Arina
