Bug 164764 Joint data set does not work properly using attached flatfile
The data set preview keep empty in joint data set. Step to reproduce: 1.Create two data sets based on attached flat file 2.Make an inner join using joint data set with key "A". 3.Preview data set in data set editor. Expect result: The data set preview correctly Actual result: The data set preview is empty.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/script/ScriptEvalUtil.java
+ ( resultOp2 == null? null: ( ", resultOp2=" + LogUtil.toString( resultOp2 ) ) ) 
				);
		boolean result = false;
		switch ( operator )
		{
			case IConditionalExpression.OP_EQ :
			    result = compare( resultObject, resultOp1 ) == 0;
				break;
			case IConditionalExpression.OP_NE :
			    result = compare( resultObject, resultOp1 ) != 0;
				break;
			case IConditionalExpression.OP_LT :
				result = compare( resultObject, resultOp1 ) < 0;
				break;
			case IConditionalExpression.OP_LE :
				result = compare( resultObject, resultOp1 ) <= 0;
				break;
			case IConditionalExpression.OP_GE :
				result = compare( resultObject, resultOp1 ) >= 0;
				break;
			case IConditionalExpression.OP_GT :
				result = compare( resultObject, resultOp1 ) > 0;
				break;
			case IConditionalExpression.OP_BETWEEN :
				result = between( resultObject, resultOp1, resultOp2 );
				break;
			case IConditionalExpression.OP_NOT_BETWEEN :
				result = !( between( resultObject, resultOp1, resultOp2 ) );
				break;
			case IConditionalExpression.OP_NULL :