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Posted to dev@lens.apache.org by "Sushil Mohanty (JIRA)" <ji...@apache.org> on 2015/02/23 07:39:11 UTC

[jira] [Commented] (LENS-332) Use prepare statement for query syntax and semantic validation

    [ https://issues.apache.org/jira/browse/LENS-332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14333046#comment-14333046 ] 

Sushil Mohanty commented on LENS-332:
-------------------------------------

Review request : https://reviews.apache.org/r/31294/

> Use prepare statement for query syntax and semantic validation 
> ---------------------------------------------------------------
>
>                 Key: LENS-332
>                 URL: https://issues.apache.org/jira/browse/LENS-332
>             Project: Apache Lens
>          Issue Type: Improvement
>          Components: driver-jdbc
>            Reporter: Sushil Mohanty
>            Assignee: Sushil Mohanty
>
> Currently we are using "select roughly" for query validation in jdbc driver. Rough query can take more time based on the query complexity and can't guarantee to finish <50ms. On the other hand prepare query is very light weight and we can expect it to finish in defined threshold and is supported by  major DBMS.



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