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https://issues.apache.org/jira/browse/ASTERIXDB-2913?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael J. Carey updated ASTERIXDB-2913:
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Description:
Consider the following query using the Don Chamberlin book data:
USE DonCData;
WITH flat_orders AS (SELECT orderno, custid, order_date, ship_date FROM orders),
flat_items AS (SELECT o.orderno, i.* FROM orders o, o.items i)
SELECT fo.*, fi.* FROM flat_orders fo, flat_items fi
WHERE fo.orderno = fi.orderno;
Right now this query leads to two scans of orders - one for flat_orders and one
for flat_items - followed by a join of the two.
> Need "break up to make up" rewrite rule for unnested data
> ---------------------------------------------------------
>
> Key: ASTERIXDB-2913
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-2913
> Project: Apache AsterixDB
> Issue Type: Bug
> Reporter: Michael J. Carey
> Priority: Major
>
> Consider the following query using the Don Chamberlin book data:
> USE DonCData;
> WITH flat_orders AS (SELECT orderno, custid, order_date, ship_date FROM
> orders),
> flat_items AS (SELECT o.orderno, i.* FROM orders o, o.items i)
> SELECT fo.*, fi.* FROM flat_orders fo, flat_items fi
> WHERE fo.orderno = fi.orderno;
> Right now this query leads to two scans of orders - one for flat_orders and
> one for flat_items - followed by a join of the two.
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