[teiid-issues] [JBoss JIRA] (TEIID-4740) Update statement doesn't work correctly for data sources in some cases

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-4740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-4740.
-----------------------------------
    Resolution: Rejected


Rejecting at this time.  There is more that could be done to compensate, but this should be an infrequent case.

> Update statement doesn't work correctly for data sources in some cases
> ----------------------------------------------------------------------
>
>                 Key: TEIID-4740
>                 URL: https://issues.jboss.org/browse/TEIID-4740
>             Project: Teiid
>          Issue Type: Bug
>          Components: Query Engine
>    Affects Versions: 9.0.3
>         Environment: teiid-9.0.3 on WildFly Full 9.0.2.Final (WildFly Core 1.0.2.Final)
>            Reporter: dalex dalex
>            Assignee: Steven Hawkins
>            Priority: Blocker
>
> Running the following query:
> {code:sql}
> UPDATE test_int.contacttest
> SET test_int.contacttest.salutation = ( 
>  select 
>  test_int.updatetest.prefix
>  from test_int.updatetest
>  where test_int.updatetest.id = test_int.contacttest.id
>  );
> {code}
> works correctly changing salutation field value according to where condition (note that contacttest and updatetest table are in the same test_int data source). But the following query:
> {code:sql}
> UPDATE test.contacttest
> SET test.contacttest.salutation = ( 
>  select 
>  test_int.updatetest.prefix
>  from test_int.updatetest
>  where test_int.updatetest.id = test.contacttest.id
>  );
> {code}
>  will fail as we try to update "contacttest" table of "test" data source from another "test_int" data source using "updatetest" table in where condition. The query fails showing the following error message:
> {code}
> Error: TEIID30253 Remote org.teiid.api.exception.query.QueryPlannerException: TEIID30253 Source UPDATE or DELETE command "UPDATE test.contacttest SET salutation = (SELECT test_int.updatetest.prefix FROM test_int.updatetest WHERE test_int.updatetest.id = test.contacttest.id LIMIT 2)" contains non-pushdown constructs and no compensating action can be taken as the table lacks a unique key or the source does not support equality predicates. 
> SQLState:  50000
> ErrorCode: 30253
> {code}



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