Bug 195970 Two issues when evaluate a query inlcuding a subquery[07]
Description: Currently, when evaluating a query which includes a subquery, the query will be evaluated twice. The binding of query will pass to subquery twice. If user write a java script such as new Date() and i++. The result of query will be incorrect. Another issue: when write the report document, the binding of query will be written twice and the performance is not good to evalulate it twice.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/document/RowSaveUtil.java
{
	public static Integer EXCEPTION_INDICATOR = new Integer(Integer.MAX_VALUE - 100);
	private int lastRowIndex;
	private int currentOffset;
	private int rowCount;
	
	
	private DataOutputStream rowExprsDos;
	private DataOutputStream rowLenDos;
	private boolean inited;
	private Set exprNameSet;
	
	/**
	 * @param rowCount
	 * @param rowExprsOs
	 * @param rowLenOs
	 */
	RowSaveUtil( int rowCount, OutputStream rowExprsOs,
			OutputStream rowLenOs, Set exprNameSet )
	{
		this.rowCount = rowCount;
		this.rowExprsDos = new DataOutputStream( rowExprsOs );