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Posted to dev@mrql.apache.org by "Leonidas Fegaras (JIRA)" <ji...@apache.org> on 2015/01/16 17:15:34 UTC

[jira] [Created] (MRQL-61) Fix bug on select over union queries

Leonidas Fegaras created MRQL-61:
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             Summary: Fix bug on select over union queries
                 Key: MRQL-61
                 URL: https://issues.apache.org/jira/browse/MRQL-61
             Project: MRQL
          Issue Type: Bug
          Components: Query Optimization, Query Translation
    Affects Versions: 0.9.4
            Reporter: Leonidas Fegaras
            Assignee: Leonidas Fegaras
            Priority: Critical


This bug was reported by Marcos Freitas. Queries of the form:
{code:SQL}
select ... from x in ((select ...) union (select ...)) ...
{code}
cause a type error on the generated plan. The generated plan is also wrong (a cross product instead of a union). This error is probably in the QueryPlan class. 



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