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https://issues.apache.org/jira/browse/BEAM-8508?focusedWorklogId=336519&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-336519
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ASF GitHub Bot logged work on BEAM-8508:
----------------------------------------
Author: ASF GitHub Bot
Created on: 30/Oct/19 23:09
Start Date: 30/Oct/19 23:09
Worklog Time Spent: 10m
Work Description: 11moon11 commented on pull request #9943: [BEAM-8508]
[SQL] [WIP] Standalone filter push down
URL: https://github.com/apache/beam/pull/9943
- Update the push-down rule to perform predicate push-down for IOs that do
not support project push-down.
- Update the `BeamCalcRel#beamComputeSelfCost` method to favor programs with
smaller predicates.
- Fixed a bug when selecting a field more than once to not drop the calc,
since IOs cannot duplicate projected fields. Also added test cases to ensure
expected behavior from `Project`, `Filter`, `ProjectAndFilter` push-downs.
Other changes:
- Rename `TestTableProviderWithFilterPushDown` to
`TestTableProviderWithFilterAndProjectPushDown`, since it tests when both are
supported.
- Created a new file `TestTableProviderWithFilterPushDown` to test when only
filter push-down is supported.
------------------------
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Issue Time Tracking
-------------------
Worklog Id: (was: 336519)
Remaining Estimate: 0h
Time Spent: 10m
> [SQL] Support predicate push-down without project push-down
> -----------------------------------------------------------
>
> Key: BEAM-8508
> URL: https://issues.apache.org/jira/browse/BEAM-8508
> Project: Beam
> Issue Type: Improvement
> Components: dsl-sql
> Reporter: Kirill Kozlov
> Assignee: Kirill Kozlov
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In this PR: [https://github.com/apache/beam/pull/9863]
> Support for Predicate push-down is added, but only for IOs that support
> project push-down.
> In order to accomplish that some checks need to be added to not perform
> certain Calc and IO manipulations when only filter push-down is needed.
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