Shen Yu

This bug means a feature request: we need to add a new type `timestamp` to `Literal` in the [query.thrift](https://github.com/apache/pinot/blob/2bcf592d433241b07dcaac82833df4b225617410/pinot-common/src/thrift/query.thrift#L70). We get an error in query `select cast(cast ('2023-01-01 00:00:00' as...