[teiid-issues] [JBoss JIRA] (TEIID-2843) MongoDB: ClassCastException while doing JOIN based query

[Ramesh Reddy (JIRA)]

Ramesh Reddy created TEIID-2843:
-----------------------------------

             Summary: MongoDB: ClassCastException while doing JOIN based query
                 Key: TEIID-2843
                 URL: https://issues.jboss.org/browse/TEIID-2843
             Project: Teiid
          Issue Type: Bug
          Components: Misc. Connectors
    Affects Versions: 8.4
            Reporter: Ramesh Reddy
            Assignee: Ramesh Reddy
             Fix For: 8.7


With Schema like
{code}
            CREATE FOREIGN TABLE Company (
                name varchar(50) PRIMARY KEY,
                description varchar(256)
            ) OPTIONS(UPDATABLE 'TRUE',"teiid_mongo:EMBEDDABLE" 'true');

            CREATE FOREIGN TABLE Job (
                jobId integer PRIMARY KEY,
                description varchar(256),                
                companyname varchar(50),
                FOREIGN KEY (companyname) REFERENCES Company (name)
            ) OPTIONS(UPDATABLE 'TRUE', "teiid_mongo:EMBEDDABLE" 'true');
        
            CREATE FOREIGN TABLE Employee (
                ename varchar(50) PRIMARY KEY,
                jobId integer,
                FOREIGN KEY (jobId) REFERENCES Job (jobId)
            ) OPTIONS(UPDATABLE 'TRUE');
{code}

then doing a single JOIN Query

{code}
select e.ename, c.name, j.description from Employee as e JOIN Job j ON e.jobId = j.jobId JOIN Company c ON j.companyname = c.name
{code}

fails with 

{code}
14:22:05,271 ERROR [org.teiid.PROCESSOR] (Worker23_QueryProcessorQueue432) 258Se2CWMytI TEIID30019 Unexpected exception for request 258Se2CWMytI.28: java.lang.ClassCastException: org.teiid.language.Join cannot be cast to org.teiid.language.NamedTable
	at org.teiid.translator.mongodb.MongoDBSelectVisitor.visit(MongoDBSelectVisitor.java:419)
	at org.teiid.language.Join.acceptVisitor(Join.java:66) [teiid-api-8.7.0.Alpha3-SNAPSHOT.jar:8.7.0.Alpha3-SNAPSHOT]
	at org.teiid.language.visitor.AbstractLanguageVisitor.visitNode(AbstractLanguageVisitor.java:51) [teiid-api-8.7.0.Alpha3-SNAPSHOT.jar:8.7.0.Alpha3-SNAPSHOT]
	at org.teiid.translator.mongodb.MongoDBSelectVisitor.append(MongoDBSelectVisitor.java:95)
	at org.teiid.translator.mongodb.MongoDBSelectVisitor.append(MongoDBSelectVisitor.java:106)
	at org.teiid.translator.mongodb.MongoDBSelectVisitor.visit(MongoDBSelectVisitor.java:482)
	at org.teiid.language.Select.acceptVisitor(Select.java:103) [teiid-api-8.7.0.Alpha3-SNAPSHOT.jar:8.7.0.Alpha3-SNAPSHOT]
	at org.teiid.language.visitor.AbstractLanguageVisitor.visitNode(AbstractLanguageVisitor.java:51) [teiid-api-8.7.0.Alpha3-SNAPSHOT.jar:8.7.0.Alpha3-SNAPSHOT]
{code}

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