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From "Nagarajan Chinnasamy (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-5132) Context based dynamic parameterization of views
Date Fri, 16 Dec 2016 07:18:58 GMT

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

Nagarajan Chinnasamy commented on DRILL-5132:

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, 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
> * *Data Protection in building Chained Views* with Custom Dynamic Filters
> I will post further design details in the comments....

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