Calcite schema around jdbc with per user fitlered tables

Question

I need to expose for users an SQL like engine on top of specific jdbc datasource. Each user should only see a specific filtered data from this jdbc datasource.

So when a specific user runs his SQL against datasource, like:

select * from table where column = value

the engine should perform rather enhanced query:

select * from (select * from table where user = specific_user) where column = value

I have started messing around Calcite - how can achieve such logic with it? Should I add a custom view on top of JDBCSchema or try to build some new schema delegating to JDBCSchema?

Answer 1

Is the list of tables to be filtered (and the columns that hold the user name) known in advance? If so, you could build a JSON model file containing hand-written view definitions.