rowExprsIs.seek( IOUtil.readInt( rowLenIs ) + 4 );
rowExprsIs.seek( IOUtil.readInt( rowLenIs ) + this.metaOffset );
	private void skipTo( int absoluteIndex ) throws IOException, DataException	{		if ( currRowLenReadIndex == absoluteIndex )			return;				currRowLenReadIndex = absoluteIndex + 1;				rowLenIs.seek( absoluteIndex * 4 );				rowExprsIs.seek( IOUtil.readInt( rowLenIs ) + 4 );		rowExprsDis = new DataInputStream( rowExprsIs );	}