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https://issues.apache.org/jira/browse/TAJO-1406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14390334#comment-14390334
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Jihun Kang commented on TAJO-1406:
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Do you mean it would be better to change with clause as an inline view?
> Support WITH clause without RECURSIVE
> -------------------------------------
>
> Key: TAJO-1406
> URL: https://issues.apache.org/jira/browse/TAJO-1406
> Project: Tajo
> Issue Type: New Feature
> Components: parser, planner/optimizer
> Reporter: Dongjoon Hyun
>
> WITH clause is widely used expression in SQL language, for e.g., TPC-DS Q1,
> Q2, Q4, Q5, Q11, Q14, Q23, Q24, Q30, Q31, Q33, Q39, Q47, Q51, Q54, Q56, Q57,
> Q58, Q59, Q60, Q64, Q74, Q75, Q77, Q78, Q80, Q81, Q83, Q95, Q97.
> Refer the following queries in
> http://www.postgresql.org/docs/9.4/static/queries-with.html.
> {code:sql}
> WITH regional_sales AS (
> SELECT region, SUM(amount) AS total_sales
> FROM orders
> GROUP BY region
> ), top_regions AS (
> SELECT region
> FROM regional_sales
> WHERE total_sales > (SELECT SUM(total_sales)/10 FROM regional_sales)
> )
> SELECT region,
> product,
> SUM(quantity) AS product_units,
> SUM(amount) AS product_sales
> FROM orders
> WHERE region IN (SELECT region FROM top_regions)
> GROUP BY region, product;
> {code}
> In this issue, WITH RECURSIVE does not support. It should be handled as a
> separate issue.
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