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

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 Fix For: 7.7 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;