Bug 187445 The joint result of script computed column is incorrect[07]
Description: 1, Each dataset including a computed column: name: index; type:integer; expression:0 2, Specify the script of datasets to: beforeOpen: index=0; onFetch: row["index"] = index; index++; 3, Join the two datasets Build number: 2.2.0.v20070516-0630 Steps to reproduce: 1, open the attached report design 2, open the joint dataset and preview Actual result: The result of column Data "Set1::index" is all 0 but no value 1.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ComputedColumnHelper.java
* @return
	 */
	public List getComputedColumnList( )
	{
		if ( this.getCurrentInstance( ) != null )
			return this.getCurrentInstance( ).getComputedColumnList( );
		else
			return this.allCC;
	}
	/**
	 * 
	 * @param rePrepare
	 */
	public void setRePrepare( boolean rePrepare )
	{
		if ( this.getCurrentInstance( ) != null )
			this.getCurrentInstance( ).setRePrepare( rePrepare );
	}
	/**
	 * 
	 * @param model
	 */
	public void setModel( int model )
	{
		this.currentModel = model;
	}
		
	/**
	 * 
	 * @param dataSetCCList