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https://issues.apache.org/jira/browse/KYLIN-3594?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shaofeng SHI updated KYLIN-3594:
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Fix Version/s: v2.6.0
> 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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