Bug 189100 [Regression]X-axis data column issue[0001]
Description: [Regression]X-axis data column issue[0001] Step: 1.New a sample datasource and dataset from OFFICES 2.New a chart and use the dataset 3.Change the data type of OFFICECODE from string to integer. 4.Drop the column of OFFICECODE to Value(Y)Series. Actual result: Show the error message: Unable to use a text data to render a numerical/datetime axis.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/BindingColumnsEvalUtil.java
while ( itr.hasNext( ) )
		{
			GroupBindingColumn temp = (GroupBindingColumn) itr.next( );
			groupBindingColumns[temp.getGroupLevel( )] = temp;
		}
		allManualBindingExprs = new ArrayList( );
		for ( int i = 0; i < size; i++ )
		{
			List groupBindingExprs = new ArrayList( );
			itr = groupBindingColumns[i].getColumnNames( ).iterator( );
			while ( itr.hasNext( ) )
			{
				String exprName = (String) itr.next( );
				IBaseExpression baseExpr = groupBindingColumns[i].getExpression( exprName );
				groupBindingExprs.add( new BindingColumn( exprName,
						baseExpr,
						groupBindingColumns[i].getBinding( exprName )
								.getAggrFunction( ) != null,
						groupBindingColumns[i].getBinding( exprName )
								.getDataType( ) ) );
			}
			allManualBindingExprs.add( groupBindingExprs );
		}
		
		
		allAutoBindingExprs = new ArrayList( );
		itr = autoBindingExprs.entrySet( ).iterator( );
		while ( itr.hasNext( ) )
		{
			Map.Entry entry = (Entry) itr.next( );