[teiid-issues] [JBoss JIRA] (TEIID-1893) TeiidException when executing SELECT subquery with more than 2 UNIONs

[Andriy Rokhmanov (Updated) (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-1893?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andriy Rokhmanov updated TEIID-1893:
------------------------------------

    Attachment: plan.txt


Execution Plan for problematic sql statement #1.
                
> TeiidException when executing SELECT subquery with more than 2 UNIONs
> ---------------------------------------------------------------------
>
>                 Key: TEIID-1893
>                 URL: https://issues.jboss.org/browse/TEIID-1893
>             Project: Teiid
>          Issue Type: Bug
>          Components: Query Engine
>    Affects Versions: 7.6
>         Environment: Windows 7, JBoss 5.1.0.GA, java version "1.6.0_22" 64 bit
>            Reporter: Andriy Rokhmanov
>            Assignee: Steven Hawkins
>         Attachments: plan.txt
>
>
> Exception: org.teiid.core.TeiidException happens after executing select statement #1, but works fine on #2 and #3.
> The execution plan for problematic statement attached.
> 1. Problematic SQL Statement:
> 	SELECT T.ROLE_NAME as ROLE_NAME, T.SCHEMA_NAME as SCHEMA_NAME, T.INSTALL_STATUS as INSTALL_STATUS
> 		FROM (
> 				SELECT ROLE_NAME, 'demodata_chorus_metadata' as SCHEMA_NAME, INSTALL_STATUS from demodata_chorus_metadata.chorus_role 
> 				UNION
> 				SELECT ROLE_NAME, 'security_cia_chorus_metadata' as SCHEMA_NAME, INSTALL_STATUS from security_cia_chorus_metadata.chorus_role 
> 				UNION
> 				SELECT ROLE_NAME, 'vantage_chorus_metadata' as SCHEMA_NAME, INSTALL_STATUS from vantage_chorus_metadata.chorus_role 
> 			) AS T, chorus_license.RL_LICENSE as L 
> 		WHERE T.ROLE_NAME = L.ROLE_NAME 
> 		AND T.install_status = true;
> 2. This SQL statement works fine (the difference between #1 and #2 is in final 'AND...' clause):
> 	SELECT T.ROLE_NAME as ROLE_NAME, T.SCHEMA_NAME as SCHEMA_NAME, T.INSTALL_STATUS as INSTALL_STATUS
> 		FROM (
> 				SELECT ROLE_NAME, 'demodata_chorus_metadata' as SCHEMA_NAME, INSTALL_STATUS from demodata_chorus_metadata.chorus_role 
> 				UNION
> 				SELECT ROLE_NAME, 'security_cia_chorus_metadata' as SCHEMA_NAME, INSTALL_STATUS from security_cia_chorus_metadata.chorus_role 
> 				UNION
> 				SELECT ROLE_NAME, 'vantage_chorus_metadata' as SCHEMA_NAME, INSTALL_STATUS from vantage_chorus_metadata.chorus_role 
> 			) AS T, chorus_license.RL_LICENSE as L 
> 		WHERE T.ROLE_NAME = L.ROLE_NAME;
> 3. This SQL statement also works fine (the difference between #1 and #3 is only two UNIONs included out of three, does not matter which ones)
> 	SELECT T.ROLE_NAME as ROLE_NAME, T.SCHEMA_NAME as SCHEMA_NAME, T.INSTALL_STATUS as INSTALL_STATUS
> 		FROM (
> 				SELECT ROLE_NAME, 'security_cia_chorus_metadata' as SCHEMA_NAME, INSTALL_STATUS from security_cia_chorus_metadata.chorus_role 
> 				UNION
> 				SELECT ROLE_NAME, 'vantage_chorus_metadata' as SCHEMA_NAME, INSTALL_STATUS from vantage_chorus_metadata.chorus_role 
> 			) AS T, chorus_license.RL_LICENSE as L 
> 		WHERE T.ROLE_NAME = L.ROLE_NAME 
> 		AND T.install_status = true;

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