Wrong alias rewriting in subqueries ----------------------------------- Key: TEIID-3846 URL: https://issues.jboss.org/browse/TEIID-3846 Project: Teiid Issue Type: Bug Components: Query Engine Affects Versions: 8.7 Reporter: Salvatore R Assignee: Steven Hawkins Fix For: 8.13, 8.12.3 I defined two tables in PostgreSQL (but it's reproducible also in other databases like MySQL, for example) as follows: {code:sql} CREATE TABLE test_a ( a integer, b integer ); CREATE TABLE test_b ( b integer, c integer ); {code} Running this query: {code:sql} SELECT * FROM ( SELECT ( SELECT x.a FROM pg.test_a AS x WHERE x.b = g_0.c ) AS c_2 FROM pg.test_b AS g_0 ) AS v_0 {code} I get the following exception: {code:sql} 13:11:30,073 WARN [org.teiid.CONNECTOR] (Worker5_QueryProcessorQueue50) 1iTDksSjXt1V Connector worker process failed for atomic-request=1iTDksSjXt1V.16.1.11: org.teiid.translator.jdbc.JDBCExecutionException: 0 TEIID11008:TEIID11004 Error executing statement(s): [Prepared Values: [] SQL: SELECT v_0.c_0 FROM (SELECT (SELECT g_1."a" FROM "public"."test_a" AS g_1 WHERE g_1."b" = g_1."c") AS c_0 FROM "public"."test_b" AS g_0) AS v_0] at org.teiid.translator.jdbc.JDBCQueryExecution.execute(JDBCQueryExecution.java:131) [translator-jdbc-8.12.0.CR1.jar:8.12.0.CR1] at org.teiid.dqp.internal.datamgr.ConnectorWorkItem.execute(ConnectorWorkItem.java:349) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_67] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_67] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_67] at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_67] at org.teiid.dqp.internal.datamgr.ConnectorManager$1.invoke(ConnectorManager.java:211) at com.sun.proxy.$Proxy47.execute(Unknown Source) at org.teiid.dqp.internal.process.DataTierTupleSource.getResults(DataTierTupleSource.java:298) at org.teiid.dqp.internal.process.DataTierTupleSource$1.call(DataTierTupleSource.java:110) at org.teiid.dqp.internal.process.DataTierTupleSource$1.call(DataTierTupleSource.java:107) at java.util.concurrent.FutureTask.run(FutureTask.java:262) [rt.jar:1.7.0_67] at org.teiid.dqp.internal.process.FutureWork.run(FutureWork.java:58) at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:276) at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:119) at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:210) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_67] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_67] at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_67] Caused by: org.postgresql.util.PSQLException: ERROR: column g_1.c does not exist Position: 91 at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2157) at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1886) at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255) at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:555) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:417) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:302) at org.jboss.jca.adapters.jdbc.WrappedPreparedStatement.executeQuery(WrappedPreparedStatement.java:462) at org.teiid.translator.jdbc.JDBCQueryExecution.execute(JDBCQueryExecution.java:123) [translator-jdbc-8.12.0.CR1.jar:8.12.0.CR1] ... 18 more {code} It seems that the problem is related to the alias "g_0" used for the source table "pg.test_b". In fact, if a different alias is used, the query runs without errors: {code:sql} SELECT * FROM ( SELECT ( SELECT x.a FROM pg.test_a AS x WHERE x.b = y.c ) AS c_2 FROM pg.test_b AS y ) AS v_0 {code}