[teiid-issues] [JBoss JIRA] (TEIID-3846) Wrong alias rewriting in subqueries

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-3846?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins updated TEIID-3846:
----------------------------------
        Fix Version/s: 8.13
                       8.12.3
    Affects Version/s: 8.7


Yes, having what we effectively use as a generated alias in the outer scope is not accounted for correctly with a subquery.

> Wrong alias rewriting in subqueries
> -----------------------------------
>
>                 Key: TEIID-3846
>                 URL: https://issues.jboss.org/browse/TEIID-3846
>             Project: Teiid
>          Issue Type: Bug
>    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}



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