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/api/querydefn/Binding.java
}
	public Binding( String name, IBaseExpression expr )
	{
		this.name = name;
		this.expr = expr;
		this.aggregateOn = new ArrayList();
		this.argument = new ArrayList();
		this.dataType = DataType.ANY_TYPE;
	}
	
	/*
	 * (non-Javadoc)
	 * @see org.eclipse.birt.data.engine.api.IBinding#addAggregateOn(java.lang.String)
	 */
	public void addAggregateOn( String levelName ) throws DataException
	{
		if ( this.aggregateOn.contains( levelName ))
			throw new DataException( ResourceConstants.TRY_TO_ADD_IDENTICAL_AGGR_GROUP,
					new Object[]{
							levelName, this.name
					} );
		this.aggregateOn.add( levelName );
	}
	/*
	 * (non-Javadoc)
	 * @see org.eclipse.birt.data.engine.api.IBinding#addArgument(org.eclipse.birt.data.engine.api.IBaseExpression)
	 */
	public void addArgument( IBaseExpression expr )
	{
		this.argument.add( expr );