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https://issues.apache.org/jira/browse/KYLIN-2861?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhong Yanghong closed KYLIN-2861.
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> For dictionary building of lookup table columns, reduce the table scan chance
> -----------------------------------------------------------------------------
>
> Key: KYLIN-2861
> URL: https://issues.apache.org/jira/browse/KYLIN-2861
> Project: Kylin
> Issue Type: Improvement
> Components: Job Engine
> Reporter: Zhong Yanghong
> Assignee: Zhong Yanghong
> Priority: Major
> Fix For: v2.6.0
>
>
> In some cases, several columns from the same lookup table are defined as
> normal dimensions. We'll build dictionaries for these columns. With current
> implementation, for each column, the whole lookup table needs to be scanned
> once. Then if there are N columns, kylin needs to scan the lookup table N
> times.
> For this JIRA, we'll scan only once to build all of the related columns.
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