zabetak commented on issue #1257: [CALCITE-3115] Add JdbcRules which have 
different JdbcConvention to same VolcanoPlanner's RuleSet
URL: https://github.com/apache/calcite/pull/1257#issuecomment-506074137
 
 
   Thanks for the update @wenhuitang . I've seen what you are trying to do by 
overriding `JdbcConvention.toString()` but I am afraid it might backfire on us: 
   
   - The debug logs of the planner and possibly other places will be more 
difficult to read.
   -All JdbcRules are going to be registered to the planner even if they come 
from the same convention (instantiated multiple times).
   
   I have to think a bit if there is another alternative and if it is really 
worth it getting into the process of normalizing the convention name. Give me a 
few days to think on it.

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