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Date: Fri, 16 Dec 2016 07:25:58 +0000 (UTC)
From: "Nagarajan Chinnasamy (JIRA)" <jira@apache.org>
To: issues@drill.apache.org
Message-ID: <JIRA.13028487.1481832760000.536767.1481873158343@Atlassian.JIRA>
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References: <JIRA.13028487.1481832760000@Atlassian.JIRA> <JIRA.13028487.1481832760566@arcas>
Subject: [jira] [Comment Edited] (DRILL-5132) Context based dynamic
 parameterization of views
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archived-at: Fri, 16 Dec 2016 07:26:02 -0000


    [ https://issues.apache.org/jira/browse/DRILL-5132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15753692#comment-15753692 ] 

Nagarajan Chinnasamy edited comment on DRILL-5132 at 12/16/16 7:24 AM:
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This feature will particularly be useful for data isolation / data protection with *jdbc storage plugins* where drill-authenticated-credentials are not used for jdbc connection authentication (like in MapR-DB). A jdbc storage  has hard-coded, shared credentials. Hence the the responsibility of data isolation / data protection lies with Views themselves. Hence, the need for built-in support of context based dynamic filtering in Views.


was (Author: nagarajanchinnasamy):
This feature will particularly be useful for data isolation / data protection with *jdbc storage plugins* where drill-authenticated-credentials are not used for jdbc connection authentication (like in MapR-DB). A jdbc storage  has hard-coded, shared credentials. Hence the the responsibility of data isolation / data protection lies with Views themselves.

> Context based dynamic parameterization of views
> -----------------------------------------------
>
>                 Key: DRILL-5132
>                 URL: https://issues.apache.org/jira/browse/DRILL-5132
>             Project: Apache Drill
>          Issue Type: Wish
>          Components:  Server
>            Reporter: Nagarajan Chinnasamy
>            Priority: Critical
>              Labels: authentication, context, isolation, jdbcstorage, multi-tenancy
>
> Its known that Views in SQL cannot have dynamic parameters/variables.  Please refer to [Justin Swanhart|http://stackoverflow.com/users/679236/justin-swanhart]'s response to [this SO question|http://stackoverflow.com/questions/2281890/can-i-create-view-with-parameter-in-mysql] in handling dynamic parameterization of views. 
> [The PR #685|https://github.com/apache/drill/pull/685] [DRILL-5043|https://issues.apache.org/jira/browse/DRILL-5043?filter=-2] originated based on this requirement so that we could build views that can dynamically filter records based on some dynamic values (like current tenant-id, user role etc.) 
> *Since Drill's basic unit is a View... having such built-in support can bring in dynamism into the whole game.*
> This feature can be utilized for:
> * *Data Isolation in Shared Multi-Tenant environments* based on Custom Tenant Discriminator Column
> * *Data Protection in building Chained Views* with Custom Dynamic Filters
> I will post further design details in the comments....


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