Vladimir Ozerov closed IGNITE-6296.

> SQL: Get rid of "collocated" flag
> ---------------------------------
>                 Key: IGNITE-6296
>                 URL: https://issues.apache.org/jira/browse/IGNITE-6296
>             Project: Ignite
>          Issue Type: Task
>          Components: sql
>    Affects Versions: 2.1
>            Reporter: Vladimir Ozerov
>            Priority: Major
>              Labels: usability
> This flag forces our execution engine to perform aggregations on mapper nodes 
> rather than on reducer. 
> First, we already have enough information in runtime to decide whether we can 
> optimize or not. Second, if query is complex enough, users would have hard 
> time trying to figure whether query would return correct result or not. We 
> should never ever return invalid results.
> Let's make our engine smarter, so that it is able to determine whether such 
> grouping is safe or not and then deprecate that flag.

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