ExprDataReader2( RAInputStream rowExprsIs, RAInputStream rowLenIs )
ExprDataReader2( RAInputStream rowExprsIs, RAInputStream rowLenIs ) throws DataException
	ExprDataReader2( RAInputStream rowExprsIs, RAInputStream rowLenIs )	{		this.rowExprsIs = rowExprsIs;		this.rowLenIs = rowLenIs;				this.currRowIndex = -1;		this.lastRowIndex = -1;		this.currRowLenReadIndex = -1;				this.rowIDMap = new HashMap();	}