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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