This portion of the data block contains information about the actual rows in the block (including addresses for each row piece in the row data area).
这部分的数据块包含了有关实际的行的信息(包括行数据区域每个行片段的地址)。
2
This portion of the data block contains information about the actual rows in the block (including addresses for each row piece in the row data area).
数据块的这部分包涵了关于数据块中拥有行的表的信息。
3
As a result, the engine needed to read many rows of data and apply the final filters using the actualrow data, even though indexes of the filter columns were available.