add regression test for nested selects using UNION ALL and multiple aliases of the same column. ----------------------------------------------------------------------------------------------- Key: TEIID-1862 URL: https://issues.jboss.org/browse/TEIID-1862 Project: Teiid Issue Type: Bug Components: Query Engine Affects Versions: 7.6.1 Environment: Teiid 7.6.x Reporter: Johnathon Lee Assignee: Johnathon Lee Pre 7.x code would throw a NPE with a query similar to [1]. Adding JUnit to prevent regression [1] SELECT enterprise_id FROM ( SELECT * FROM ( SELECT id, id AS display_id, 103 AS enterprise_id FROM ( SELECT 'x' as id) AS nexted103) as table103Source UNION ALL SELECT 'x', 'x' AS display_id, 101 AS enterprise_id FROM ( SELECT 'x') AS nested101 UNION ALL SELECT 'x', 'x' AS display_id, 100 AS enterprise_id FROM ( SELECT 'x') AS nested100) as tableFrom1stSelect WHERE enterprise_id = 100 -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.jboss.org/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira