Build a general code generator that is accessible from all RelNode
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dsl
new feature
P3
sql
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- Java
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Description
Right now code generation is used in Projection (in BeamCalcRel). However, code generation can be used in all places that might need to execute a function. Therefore, this JIRA propose to have a layer (called code generator) that could be used in other rels: join, aggregation, etc.
Imported from Jira [BEAM-7146](https://issues.apache.org/jira/browse/BEAM-7146). Original Jira may contain additional context.
Reported by: amaliujia.
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