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

[ASF GitHub Bot (JIRA)]

    [ 
https://issues.apache.org/jira/browse/KYLIN-3594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16641072#comment-16641072
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ASF GitHub Bot commented on KYLIN-3594:
---------------------------------------

coveralls edited a comment on issue #279: KYLIN-3594 remove unnecessary sql 
files in integration test
URL: https://github.com/apache/kylin/pull/279#issuecomment-427654298
 
 
   ## Pull Request Test Coverage Report for [Build 
3735](https://coveralls.io/builds/19392205)
   
   * **0** of **0**   changed or added relevant lines in **0** files are 
covered.
   * **2** unchanged lines in **1** file lost coverage.
   * Overall coverage increased (+**0.01%**) to **23.293%**
   
   ---
   
   
   |  Files with Coverage Reduction | New Missed Lines | % |
   | :-----|--------------|--: |
   | 
[core-cube/src/main/java/org/apache/kylin/cube/cuboid/TreeCuboidScheduler.java](https://coveralls.io/builds/19392205/source?filename=core-cube%2Fsrc%2Fmain%2Fjava%2Forg%2Fapache%2Fkylin%2Fcube%2Fcuboid%2FTreeCuboidScheduler.java#L124)
 | 2 | 68.46% |
   <!-- | **Total:** | **2** |  | -->
   
   |  Totals | [![Coverage 
Status](https://coveralls.io/builds/19392205/badge)](https://coveralls.io/builds/19392205)
 |
   | :-- | --: |
   | Change from base [Build 3732](https://coveralls.io/builds/19385953): |  
0.01% |
   | Covered Lines: | 16301 |
   | Relevant Lines: | 69983 |
   
   ---
   ##### 💛  - [Coveralls](https://coveralls.io)
   

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> Select with Catalog fails
> -------------------------
>
>                 Key: KYLIN-3594
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3594
>             Project: Kylin
>          Issue Type: Bug
>            Reporter: Hosur Narahari
>            Assignee: XiaoXiang Yu
>            Priority: Major
>             Fix For: v2.6.0
>
>
> 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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