[jira] [Created] (KYLIN-3594) Select with Catalog fails

["Hosur Narahari (JIRA)" <ji...@apache.org>]

Hosur Narahari created KYLIN-3594:
-------------------------------------

             Summary: Select with Catalog fails
                 Key: KYLIN-3594
                 URL: https://issues.apache.org/jira/browse/KYLIN-3594
             Project: Kylin
          Issue Type: Bug
            Reporter: Hosur Narahari


By using DatabaseMetaData if we get catalog using getCatalogs() method, it return value "defaultCatalog". It returns actual hive schema when we execute getSchemas().
According to JDBC contract, catalog.schema.table should be valid from clause and many query layers use that. But kylin fails when we execute that query.
I've tried to write sample code piece for that below.
 
        _DatabaseMetaData db = conn.getMetaData();_
        _ResultSet catalogSet = db.getCatalogs();_
        _String catalog = "";_
        _if(catalogSet.next()) {_
            _catalog = catalogSet.getString("TABLE_CAT");_
        _}_
        _ResultSet schemaSet = db.getSchemas();_
        _String schema = "";_
        _if(schemaSet.next()) {_
            _schema = schemaSet.getString("TABLE_SCHEM");_
        _}_
        _StringBuilder sb = new StringBuilder("SELECT * FROM ");_
        _if(!catalog.isEmpty()) {_
            _sb.append(catalog + ".");_
        _}_
        _if(!schema.isEmpty()) {_
            _sb.append(schema + ".");_
        _}_
        _sb.append("kylin_sales limit 10");_
        _String query = sb.toString();_
        _Statement stat = conn.createStatement();_
        _ResultSet rs = stat.executeQuery(query);_
        _while(rs.next()) {_
            _System.out.println(rs.getObject("trans_id"));_
        _}_
In short, the above snippet is executing the query,
_select * from defaultCatalog.DEFAULT.kylin_sales._
 
Same thing happens even with different schemas if we have like,
_select * from defaultCatalog.test.kylin_sales_ also fails.



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