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

[dalex dalex (JIRA)]

dalex dalex created TEIID-4740:
----------------------------------

             Summary: 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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