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https://issues.apache.org/jira/browse/BEAM-8343?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anonymous updated BEAM-8343:
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Status: Triage Needed (was: Resolved)
> 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
> Priority: P2
> Fix For: 2.18.0
>
> Time Spent: 7h 40m
> Remaining Estimate: 0h
>
> 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 constructFilter(List<RexNode> filter)
> - ProjectSupport supportsProjects()
> - PCollection<Row> buildIOReader(PBegin begin, BeamSqlTableFilter filters,
> List<String> fieldNames)
>
> ProjectSupport is an enum with the following options:
> * NONE
> * WITHOUT_FIELD_REORDERING
> * WITH_FIELD_REORDERING
>
> Design doc
> [link|https://docs.google.com/document/d/1-ysD7U7qF3MAmSfkbXZO_5PLJBevAL9bktlLCerd_jE/edit?usp=sharing].
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