Provide a data type column for the last query dataset #3811
Description
In some scenarios, we have no way to know the data type of a time series.
Therefore, after executing a last query, we often need to execute show timeseries to get the type of the timeseries. This is undoubtedly a waste of network resources and computing resources.
It would be best if we can get the type of each timeseries after executing the last query.