select
   "FOO"."FOO_ID" "FOO_ID"
from (
   (select "ITEMS"."ITEM_ID" "FOO_ID" from "BLAH"."ITEMS" "ITEMS" group by "ITEMS"."ITEM_ID")
   union all
   (select "ITEMS"."ITEM_ID" "FOO_ID" from "BLAH"."ITEMS" "ITEMS")
) "FOO"
order by "FOO_ID" desc;

03:47:21,218 WARN  [org.teiid.CONNECTOR] (Worker7_QueryProcessorQueue189) 6w9Z3uBcAONA Connector worker process failed for atomic-request=6w9Z3uBcAONA.8.1.39: org.teiid.translator.jdbc.JDBCExecutionException: 904 TEIID11008:TEIID11004 Error executing statement(s): [Prepared Values: [] SQL: SELECT g_1."ITEM_ID" AS c_0 FROM "BLAH"."ITEMS" g_1 GROUP BY g_1."ITEM_ID" UNION ALL SELECT g_0."ITEM_ID" AS c_0 FROM "BLAH"."ITEMS" g_0 ORDER BY FOO_ID DESC]
	at org.teiid.translator.jdbc.JDBCQueryExecution.execute(JDBCQueryExecution.java:131)
	at org.teiid.dqp.internal.datamgr.ConnectorWorkItem.execute(ConnectorWorkItem.java:326) [teiid-engine-8.8.0.Alpha2-SNAPSHOT.jar:8.8.0.Alpha2-SNAPSHOT]
	at org.teiid.dqp.internal.process.DataTierTupleSource.getResults(DataTierTupleSource.java:298) [teiid-engine-8.8.0.Alpha2-SNAPSHOT.jar:8.8.0.Alpha2-SNAPSHOT]
	at org.teiid.dqp.internal.process.DataTierTupleSource$1.call(DataTierTupleSource.java:110) [teiid-engine-8.8.0.Alpha2-SNAPSHOT.jar:8.8.0.Alpha2-SNAPSHOT]
	at org.teiid.dqp.internal.process.DataTierTupleSource$1.call(DataTierTupleSource.java:107) [teiid-engine-8.8.0.Alpha2-SNAPSHOT.jar:8.8.0.Alpha2-SNAPSHOT]
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) [rt.jar:1.7.0_02]
	at java.util.concurrent.FutureTask.run(FutureTask.java:166) [rt.jar:1.7.0_02]
	at org.teiid.dqp.internal.process.FutureWork.run(FutureWork.java:58) [teiid-engine-8.8.0.Alpha2-SNAPSHOT.jar:8.8.0.Alpha2-SNAPSHOT]
	at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:274) [teiid-engine-8.8.0.Alpha2-SNAPSHOT.jar:8.8.0.Alpha2-SNAPSHOT]
	at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:119) [teiid-engine-8.8.0.Alpha2-SNAPSHOT.jar:8.8.0.Alpha2-SNAPSHOT]
	at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:214) [teiid-engine-8.8.0.Alpha2-SNAPSHOT.jar:8.8.0.Alpha2-SNAPSHOT]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.7.0_02]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.7.0_02]
	at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_02]
Caused by: java.sql.SQLSyntaxErrorException: ORA-00904: "FOO_ID": invalid identifier

	at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:450)
	at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:399)
	at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:1017)
	at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:655)
	at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:249)
	at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:566)
	at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:215)
	at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:58)
	at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:776)
	at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:897)
	at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1034)
	at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3820)
	at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3867)
	at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1502)
	at org.jboss.jca.adapters.jdbc.WrappedPreparedStatement.executeQuery(WrappedPreparedStatement.java:462)
	at org.teiid.translator.jdbc.JDBCQueryExecution.execute(JDBCQueryExecution.java:123)
	... 13 more