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https://issues.apache.org/jira/browse/OFBIZ-3575?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13472362#comment-13472362
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Adrian Crum commented on OFBIZ-3575:
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The link to the dev mailing list has changed:
http://ofbiz.135035.n4.nabble.com/entity-engine-union-support-td1607240.html
I need this feature too.
> Union view entity support
> -------------------------
>
> Key: OFBIZ-3575
> URL: https://issues.apache.org/jira/browse/OFBIZ-3575
> Project: OFBiz
> Issue Type: New Feature
> Components: framework
> Affects Versions: SVN trunk
> Reporter: Bob Morley
> Assignee: Adam Heath
> Attachments: OFBIZ-3575_UnionViewEntitySupport.patch
>
>
> As per conversion titled "entity-engine union support"
> (http://n4.nabble.com/entity-engine-union-support-td1607240.html#a1607240);
> here is the basic union support that we had added into our Ofbiz project. I
> have changed a little of the xml schema here ... the premise is that a
> "UnionViewEntity" extends the standard "ViewEntity" and contains a list of
> union members that it will union together. There should only be changes to
> the ModelReader to instantiate the new model object and then in SqlJdbcUtil
> to handle generating the new sql for unions. I have included a very small
> unit test that executes a findList against a test union.
> Here is sample sql that was generated:
> SELECT uva.UNION_ID, uva.TESTING_NAME, uva.TESTING_SIZE, uva.TESTING_DATE
> FROM ( SELECT T1.TESTING_ID AS UNION_ID, T1.TESTING_NAME AS TESTING_NAME,
> T1.TESTING_SIZE AS TESTING_SIZE, T1.TESTING_DATE AS TESTING_DATE FROM TESTING
> T1 UNION SELECT T2.TESTING_TYPE_ID AS UNION_ID, T2.TESTING_NAME AS
> TESTING_NAME, T2.TESTING_SIZE AS TESTING_SIZE, T2.TESTING_DATE AS
> TESTING_DATE FROM TESTING T2 ) uva
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