[jira] [Created] (HIVE-2341) SemanticAnalyzer.genJoinReduceSinkChild fails with NPE unless you specify an un-necessary table alias

[Ido Hadanny (JIRA)]

SemanticAnalyzer.genJoinReduceSinkChild fails with NPE unless you specify an 
un-necessary table alias
-----------------------------------------------------------------------------------------------------

                 Key: HIVE-2341
                 URL: https://issues.apache.org/jira/browse/HIVE-2341
             Project: Hive
          Issue Type: Bug
          Components: Query Processor
    Affects Versions: 0.7.1
            Reporter: Ido Hadanny
            Priority: Minor


Following query:

        select * from
        V_EMF_LEARNING_ACTUAL_CHURN
        join
        (select count(*) as total from standard_connections) b

fails with the NPE listed below. It doesn't if you add an alias to the table 
like so:

        select * from
        V_EMF_LEARNING_ACTUAL_CHURN a
        join
        (select count(*) as total from standard_connections) b

The exception I'm getting:

java.lang.NullPointerException
        at 
org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genJoinReduceSinkChild(SemanticAnalyzer.java:4440)
        at 
org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genJoinOperator(SemanticAnalyzer.java:4545)
        at 
org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genJoinPlan(SemanticAnalyzer.java:4704)
        at 
org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPlan(SemanticAnalyzer.java:6011)
        at 
org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:6603)
        at 
org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:238)
        at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:340)



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