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Posted to issues@beam.apache.org by "Kirill Kozlov (Jira)" <ji...@apache.org> on 2019/10/02 22:28:00 UTC

[jira] [Created] (BEAM-8343) Add means for IO APIs to support predicate and/or project push-down when running SQL pipelines

Kirill Kozlov created BEAM-8343:
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             Summary: Add means for IO APIs to support predicate and/or project push-down when running SQL pipelines
                 Key: BEAM-8343
                 URL: https://issues.apache.org/jira/browse/BEAM-8343
             Project: Beam
          Issue Type: New Feature
          Components: dsl-sql
            Reporter: Kirill Kozlov
            Assignee: Kirill Kozlov


The objective is to create a universal way for Beam SQL IO APIs to support predicate/project push-down.
A proposed way to achieve that is by introducing an interface responsible for identifying what portion(s) of a Calc can be moved down to IO layer. Also, adding following methods to a BeamSqlTable interface to pass necessary parameters to IO APIs:
- BeamSqlTableFilter supportsFilter(RexProgram program, RexNode filter)
- Boolean supportsProjects()
- PCollection<Row> buildIOReader(PBegin begin, BeamSqlTableFilter filters, List<String> fieldNames)
 

Design doc [link|https://docs.google.com/document/d/1-ysD7U7qF3MAmSfkbXZO_5PLJBevAL9bktlLCerd_jE/edit?usp=sharing].



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