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https://issues.apache.org/jira/browse/DRILL-1341?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jacques Nadeau updated DRILL-1341:
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Issue Type: Improvement (was: Bug)
> Provide efficient execution path to return metadata for BI tools
> ----------------------------------------------------------------
>
> Key: DRILL-1341
> URL: https://issues.apache.org/jira/browse/DRILL-1341
> Project: Apache Drill
> Issue Type: Improvement
> Components: Execution - Flow
> Affects Versions: 0.4.0
> Reporter: Neeraja
> Fix For: Future
>
>
> BI tools need metadata to work with query engines.
> Some BI tool retrieve metadata and data in a single query, but majority of
> tools does this in 2 steps. The first step is getting metadata and the second
> is actually use that metadata to retrieve data.
> The metadata query looks like below for ex: In tableau.
> select * from (select * from
> dfs.`default`.`/opt/drill/raw-files/click1.json`) `TableauSQL` where (0=1);
> This tracking bug is to create an efficient execution path for Drill so that
> Drill recognizes the metadata queries and returns it quickly rather than
> executing complete queries.
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