Bug 143510 mysql column alias problem
I was using the following select statement as my data source: select id_case, cases.id_state, states.state, cast(summary AS CHAR) as summary, cast(descr AS CHAR) as descr, start_date, cast(client_text AS CHAR) as client_text, group_elements.name, groups.name from states, cases LEFT OUTER JOIN group_elements ON id_analist = group_elements.id_ge LEFT OUTER JOIN groups ON cases.id_group = groups.id_group where states.id_state = cases.id_state when I came across this issue. In the preview (I'm not sure if the same happens after report generation), group_elements.name and groups.name values don't show up correctly. In fact, groups.name appears as "name_9" (which of course isn't a problem) but its values are the same as group_elements.name values. Using an alias for one of the columns solves this issue. (Obviously this might be an issue with the mysql driver, but I don't think that's the case)
data/org.eclipse.birt.report.data.adapter/src/org/eclipse/birt/report/data/adapter/impl/DataSetMetaDataHelper.java
* 
	 * @param cmdHandle
	 * @return
	 * @throws BirtException
	 */
	private IResultMetaData getCachedMetaData( CachedMetaDataHandle cmdHandle )
			throws BirtException
	{
		if ( cmdHandle == null )
			return null;
		Iterator it = cmdHandle.getResultSet( ).iterator( );
		List columnMeta = new ArrayList( );
		while ( it.hasNext( ) )
		{
			ResultSetColumnHandle rsColumn = (ResultSetColumnHandle) it.next( );
			IColumnDefinition cd = this.modelAdaptor.ColumnAdaptor( rsColumn );
			columnMeta.add( cd );
		}
		return new ResultMetaData( columnMeta );
	}
	/**
	 * @param dataSetName
	 * @return
	 * @throws BirtException
	 */
	private IResultMetaData getRealMetaData( DataSetHandle dataSetHandle )
			throws BirtException
	{
		QueryDefinition query = new QueryDefinition( );
		query.setDataSetName( dataSetHandle.getQualifiedName( ) );