Bug 208168 Meaningless exception occurs when sorting condition refer to a unused binding[07]
Description: Meaningless exception occurs when sorting condition refer to a unused binding[07] Build number: 2.3.0.v2007-0800 Steps to reproduce: 1, New a table binding with a dataset 2, Define a Sort for the table 3, Delete the binding of table which is using by sorting condition 4, Preview Expected result: The exception should be meaningful. Actual result: Exception is meaningless for user to clear the mistake point Error log: An error happen during population of data. This might be caused by including data of mixed type in a column of "ANY" type
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ComputedColumnHelper.java
value );
				}
				else
				{
					throw new DataException( ResourceConstants.EXPR_INVALID_COMPUTED_COLUMN,
							resultObject.getResultClass( )
									.getFieldName( columnIndexArray[i] ) );
				}
			}
		}
		finally
		{
			Context.exit( );
		}
		logger.exiting( ComputedColumnHelper.class.getName( ), "process" );
		return true;
	}
	/**
	 * Indicate the ComputedColumnHelper to reprepare.
	 * 
	 * @param rePrepare
	 */
	public void setRePrepare( boolean rePrepare )
	{
		this.isPrepared = !rePrepare;
	}
	/**
	 * Convert ccList to projComputedColumns, only prepare once.
	 */
	private void prepare( IResultClass resultClass ) throws DataException