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From "Julian Hyde (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (APEXMALHAR-1818) Create a Calcite operator to enable SQL commands to be run
Date Tue, 10 May 2016 18:01:13 GMT

    [ https://issues.apache.org/jira/browse/APEXMALHAR-1818?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15278580#comment-15278580
] 

Julian Hyde commented on APEXMALHAR-1818:
-----------------------------------------

Sounds good. You can use Calcite as something like a pre-processor, that takes a SQL statement
and generates a DAG (as a program). So Calcite is basically only used offline. Many people
find that a nice simple model. It definitely makes it easy to test -- you can make sure that
Calcite is generating the right DAGs and you don't need to bother running them on Apex in
order to know that Calcite (and its Apex adapter) is doing the right thing.

@thw is here at ApacheCon Big Data and he & I and [~ilganeli] are going to discuss shortly.

> Create a Calcite operator to enable SQL commands to be run
> ----------------------------------------------------------
>
>                 Key: APEXMALHAR-1818
>                 URL: https://issues.apache.org/jira/browse/APEXMALHAR-1818
>             Project: Apache Apex Malhar
>          Issue Type: New Feature
>          Components: query operators
>            Reporter: Amol
>            Assignee: Amol
>              Labels: roadmap
>
> Once we have ability to code generate, we should take a look at integrating Calcite into
Apex. The operator that enables populate DAG, should use Calcite to generate the DAG, given
a SQL query.



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