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https://issues.apache.org/jira/browse/ASTERIXDB-3025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17500463#comment-17500463
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ASF subversion and git services commented on ASTERIXDB-3025:
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Commit af65cd9aa3ac2ed11633973d1fa10c78b1d4c59e in asterixdb's branch
refs/heads/master from Wail Alkowaileet
[ https://gitbox.apache.org/repos/asf?p=asterixdb.git;h=af65cd9 ]
[ASTERIXDB-3025][HYR] Introduce ITupleProjector
- user model changes: no
- storage format changes: no
- interface changes: yes
Details:
The TupleProjector is a way to pushdown value accesses
for the internal datasets (similar to Parquet's).
The current default implementation is basically a no-op.
This patch introduces the mechanism for the columnar
format's tuple projector implementation.
Change-Id: I1fadcef70451a7616e021771a1110413de4fb711
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/15465
Contrib: Jenkins <[email protected]>
Integration-Tests: Jenkins <[email protected]>
Tested-by: Jenkins <[email protected]>
Reviewed-by: Wail Alkowaileet <[email protected]>
Reviewed-by: Ali Alsuliman <[email protected]>
Reviewed-by: Murtadha Hubail <[email protected]>
> Introduce TupleProjector to allow Value Access Pushdowns
> --------------------------------------------------------
>
> Key: ASTERIXDB-3025
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-3025
> Project: Apache AsterixDB
> Issue Type: New Feature
> Components: HYR - Hyracks
> Affects Versions: 0.9.8
> Reporter: Wail Y. Alkowaileet
> Assignee: Wail Y. Alkowaileet
> Priority: Major
> Fix For: 0.9.8
>
>
> To prepare for the column format, we need to support value access pushdown
> for internal datasets (similar to Parquet).
> The TupleProjector allows AsterixDB to ask the primary index which values are
> needed. For the columnar format, it allows Hyracks to only read values that
> have been requested by a query.
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