[teiid-issues] [JBoss JIRA] (TEIID-2058) Optimization places correlated subquery in the on clause, which is not supported by DB2

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-2058?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins closed TEIID-2058.
---------------------------------


    
> Optimization places correlated subquery in the on clause, which is not supported by DB2
> ---------------------------------------------------------------------------------------
>
>                 Key: TEIID-2058
>                 URL: https://issues.jboss.org/browse/TEIID-2058
>             Project: Teiid
>          Issue Type: Bug
>          Components: Query Engine
>    Affects Versions: 7.7
>            Reporter: Johnathon Lee
>            Assignee: Steven Hawkins
>             Fix For: 7.7.1, 8.1
>
>
> Reproducible behavior with the following simplified query [1] 
> Avoiding the error by including non-restricting criteria on tables not represented in the WHERE EXISTS clause [2].
> ie:  there seems to be a problem in the Optimization that writing the query similar to [2] will avoid.
> [1]
> SELECT                                            
>     'X' as CMR_BPR_ID2            
> FROM                                               
>     Y93                       
> INNER JOIN                                         
>     AG5                         
>  ON                                                
>     1 = 1       
> LEFT OUTER JOIN                                     
>     MFSMFL.I58 as I58                          
>  ON                                                 
>     1 = 1  
> WHERE EXISTS                                               
>   (SELECT 'Y' FROM BH0 WHERE AG5.CONSENT_CLIENT_ID  = 1 AND
> 			     Y93.CMR_BPR_ID2        = 1 )
> [2]
> SELECT                                            
>     'X' as CMR_BPR_ID2            
> FROM                                               
>     Y93                       
> INNER JOIN                                         
>     AG5                         
>  ON                                                
>     1 = 1       
> LEFT OUTER JOIN                                     
>     MFSMFL.I58 as I58                          
>  ON                                                 
>     1 = 1  
> WHERE EXISTS                                               
>   (SELECT 'Y' FROM BH0 WHERE AG5.CONSENT_CLIENT_ID  = 1 AND
> 				Y93.CMR_BPR_ID2    = 1  AND
> 				I58.FUND_CODE like '%')

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