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https://issues.apache.org/jira/browse/PARQUET-36?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14361799#comment-14361799
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Mick Davies commented on PARQUET-36:
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Based on discussion on https://github.com/apache/incubator-parquet-mr/pull/117
the scope of this JIRA should be broadened slightly.
Rather than just:
* If the delegated PrimitiveConverter supports dictionaries, then
FilteringPrimitiveConverter should too.
* An extra goal should be that the FilteringPrimitiveConverter supports
dictionaries regardless of the support in the delegated PrimitiveConverter.
This would allow possible dictionary based optimisations for filter evaluation
in all cases.
If the delegated PrimitiveConverter supports dictionaries then dictionary calls
will be passed through to it from the FilteringPrimitiveConverter. If not then
the non-dictionary typed calls will be made to it as per usual from
non-dictionary supporting converters.
> FilteringPrimitiveConverter should support dictionaries
> -------------------------------------------------------
>
> Key: PARQUET-36
> URL: https://issues.apache.org/jira/browse/PARQUET-36
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-mr
> Reporter: Alex Levenson
> Priority: Minor
> Labels: filter2
>
> If the delegated PrimitiveConverter supports dictionaries, then
> FilteringPrimitiveConverter should too.
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