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From "Jacques Nadeau (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-1341) Provide efficient execution path to return metadata for BI tools
Date Sun, 28 Dec 2014 23:31:21 GMT

     [ https://issues.apache.org/jira/browse/DRILL-1341?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jacques Nadeau updated DRILL-1341:
      Component/s: Execution - Flow
    Fix Version/s:     (was: 0.8.0)

> 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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