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From "Julian Hyde (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (APEXMALHAR-1818) Integrate Calcite to support SQL
Date Mon, 25 Jul 2016 04:59:20 GMT

    [ https://issues.apache.org/jira/browse/APEXMALHAR-1818?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15391346#comment-15391346

Julian Hyde commented on APEXMALHAR-1818:

Sounds basically good. Remember, the syntax for a streaming query in Calcite includes the
{{STREAM}} keyword, e.g. {{SELECT STREAM * FROM Orders WHERE productId = 100}}, so that if
Orders is a dual stream/table you can write {{SELECT * FROM Orders}} to get the historical

There are unit tests in Calcite, StreamTest and CsvTest.testCsvStream, that indicate how a
streaming query is parsed, planned and executed. You would substitute your own implementation
of Table, and write a version of Filter that generates an Apex plan (though I'm not sure what
that looks like).

> Integrate Calcite to support SQL
> --------------------------------
>                 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
>              Labels: roadmap
> Once we have ability to generate a subdag, 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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