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https://issues.apache.org/jira/browse/HIVE-7148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15133477#comment-15133477
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Charles Pritchard commented on HIVE-7148:
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I could really use custom bucketing functions, as I want to use buckets instead
of partitions based on a derived value.
> Use murmur hash to create bucketed tables
> -----------------------------------------
>
> Key: HIVE-7148
> URL: https://issues.apache.org/jira/browse/HIVE-7148
> Project: Hive
> Issue Type: Bug
> Reporter: Gunther Hagleitner
>
> HIVE-7121 introduced murmur hashing for queries that don't insert into
> bucketed tables. This was done to achieve better distribution of the data.
> The same should be done for bucketed tables as well, but this involves making
> sure we don't break backwards compat. This probably means that we have to
> store the partitioning function used in the metadata and use that to
> determine if SMB and bucketed map-join optimizations apply.
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