Bug 191627 [Regression]Exception occurs when first preview the joint dataset[0706]
Description: [Regression]Exception occurs when preview the flatfile and sampledb joint dataset[0706] Build number: 2.2.0.v20070608-0630 Steps to reproduce: 1, New a flatfile dataset 2, New a CUSTOMER dataset 3, Join two datasets with STATE column 4, Preview in dataset Expected result: Preview successfully Actual result: Exception occurs Error log: A BIRT exception occurred. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Data Engine Plug-in ID:org.eclipse.birt.data Version:2.2.0.v20070607-1421 Error Code:data.engine.ColumnBindingReferToInexistColumn Error Message:Column binding "Employee::CUSTOMERNUMBER" has referred to a data set column "Employee::CUSTOMERNUMBER" which is not exist.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/PreparedJointDataSourceQuery.java
rightPrefix = rightPrefix + COLUMN_NAME_SPLITTER;
			JointResultMetadata meta = populatorJointResultMetadata( left,
					leftPrefix,
					right,
					rightPrefix );
			return meta;
		}
		catch ( BirtException be )
		{
			throw DataException.wrap( be );
		}
	}
	/**
	 * Get the data set name with out library name prefix. This fix
	 * is for bugzilla bug 155848. 
	 * 
	 * @param qualifiedName
	 * @return
	 */
	private String getDataSetName( String qualifiedName )
	{
		return ExpressionUtil.getDataSetNameWithoutPrefix( qualifiedName );
	}
	
	/**
	 * Gets the Java class used to represent the specified data type.
	 * 
	 * @param typeCode
	 * @return
	 */