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https://issues.apache.org/jira/browse/IGNITE-20246?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrey Mashenkov updated IGNITE-20246:
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Description:
*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.
*Suggestion*
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.
was:
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.
> 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
> Priority: Major
> Labels: ignite-3, tech-debt
> Fix For: 3.0.0-beta2
>
>
> *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.
> *Suggestion*
> 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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