[jira] [Commented] (DRILL-1786) Pushdown filter into InfoSchema POJO Record Generator to avoid visiting unnecessary schemas

["Venki Korukanti (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-1786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14256369#comment-14256369 ] 

Venki Korukanti commented on DRILL-1786:
----------------------------------------

RB: https://reviews.apache.org/r/29343/ 

> Pushdown filter into InfoSchema POJO Record Generator to avoid visiting unnecessary schemas
> -------------------------------------------------------------------------------------------
>
>                 Key: DRILL-1786
>                 URL: https://issues.apache.org/jira/browse/DRILL-1786
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Execution - Flow
>    Affects Versions: 0.7.0, 0.8.0
>            Reporter: Sean Hsuan-Yi Chu
>            Assignee: Venki Korukanti
>             Fix For: 0.8.0
>
>         Attachments: 0001-DRILL-1786-Filter-Pushdown-into-InfoSchema-POJO-Reco.patch
>
>
> After a schema is chosen, we can query the table list in the specified schema by "show tables". 
> However, I noticed the method "getTableNames()" in every storage-plugin is called through the life-cycle of this query. This seems not necessary. Especially, when you have an unresponsive data source (DRILL-1343), the query result would not be returned even if you type "show tables" under a healthy data source



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