Retention policies vs. measurements

[thomas]

I understand the basis behind retention policies but I do not understand what they are doing in the queries.

With the following: “some_database”.“autogen”.“data”

Does that mean that to access “data” I need to know what retention policy was used to write the data?

If “data” was made of records using two different policies, I wouldn’t be able to query them at once?

Does this also mean that “data” is in fact split by retention policy and might as well be totally different measurements?

[katy]

Adding the retention policy is just another way to be more specific about your query. You can write a query without specifying the RP or add the RP to get data that is “split” by policy.