[jira] [Created] (CALCITE-528) Creating output row type of a Join does not obey case-sensitivity flags

["Aman Sinha (JIRA)" <ji...@apache.org>]

Aman Sinha created CALCITE-528:
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             Summary: Creating output row type of a Join does not obey case-sensitivity flags
                 Key: CALCITE-528
                 URL: https://issues.apache.org/jira/browse/CALCITE-528
             Project: Calcite
          Issue Type: Bug
    Affects Versions: 0.9.1-incubating
            Reporter: Aman Sinha
            Assignee: Julian Hyde


In JoinRelBase.createJoinType() which creates a row type of the output row, a HashSet of String is used to keep track of unique field names.  The field names  'column1'  and 'Column1' will both be stored.   This creates a problem for systems which are treating identifiers as case-insensitive (such as Drill) which rely on a Project below a Join to create unique names if the join columns are the same name (regardless of case).  

Ideally, the comparison for this should be done based on the criteria specified in the Lex settings when instantiating the SqlParser.ParserConfigImpl.  So, if the parser was created with MYSQL Lex settings (see Lex.java), it should be obeyed by the JoinRelBase.createJoinType().  



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