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https://issues.apache.org/jira/browse/AVRO-806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13022375#comment-13022375
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Alejandro Abdelnur commented on AVRO-806:
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Could we god simple at first? I.e., single column for unions and columns only
for the elements of depth 1 as a start.
We could add a 'column encoding' version somewhere. This would allow as to
change things and still being able to provide backwards compatibility.
> add a column-major codec for data files
> ---------------------------------------
>
> Key: AVRO-806
> URL: https://issues.apache.org/jira/browse/AVRO-806
> Project: Avro
> Issue Type: New Feature
> Components: java, spec
> Reporter: Doug Cutting
>
> Define a codec that, when a data file's schema is a record schema, writes
> blocks within the file in column-major order. This would permit better
> compression and also permit efficient skipping of fields that are not of
> interest.
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