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/ExprManagerUtil.java
String getValue( )
		{
			return this.value;
		}
		/**
		 * @param n
		 */
		void addChild( Node n )
		{
			this.children.add( n );
		}
		/** 
		 * @return
		 */
		List getChildren( )
		{
			return this.children;
		}
		/*
		 * @see java.lang.Object#equals(java.lang.Object)
		 */
		public boolean equals( Object o )
		{
			if ( ( o instanceof Node ) && ( (Node) o ).value.equals( this.value ) )
				return true;
			return false;
		}		
	}
	
}