Andrey Mashenkov created IGNITE-20246:
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             Summary: Sql. Decouple distribution trait and function.
                 Key: IGNITE-20246
                 URL: https://issues.apache.org/jira/browse/IGNITE-20246
             Project: Ignite
          Issue Type: Improvement
          Components: sql
            Reporter: Andrey Mashenkov


Motivation.

As for now, we have IgniteDistribution trait with DistributionFunction inside.
In fact, this "function" is a factory for factory for functions, but should be 
just a logical node.

`IgniteDistribution.destination()` method accepts hash-function factory 
regardless if the function hash-based or not.  LogicalRelImplementor could 
convert this logical node into a physcal node, which can calculates 
destinations, and make hash function part of this physcal node.

Let's 
1. Move `gniteDistribution.destination()` method  to some another class, which 
will be a "destination factory" and e.g. put it into a table instead of 
`distribution`.
2. Replace HashFunctionFactory with RowHandler in `destination()` method 
signature.



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