Bug 207561 [Regression] Conversion errror when preview the attached report design
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
{
				try
				{
					meta = this.metaDataProvider.getConnection( )
							.prepareStatement( this.getDataSetDesign( )
									.getQueryText( ) )
							.executeQuery( )
							.getMetaData( );
				}
				catch ( Exception ex )
				{
					meta = null;
				}
			}
			if ( meta == null )
				return;
			
			if ( this.getDataSetDesign( ).getPrimaryResultSet( ) == null )
			{
				this.shouldUpdateDataSetDesign = true;
				return;
			}
			
			ResultSetColumns rsc = this.getDataSetDesign( ).getPrimaryResultSet( ).getResultSetColumns( );
			if( meta.getColumnCount( )!= rsc.getResultColumnDefinitions( ).size( ))
			{
				this.shouldUpdateDataSetDesign = true;
				return;
			}