| 摘要 |
A system and method for restructuring the physical storage of a table of a database. The records of the table are grouped into one or more partitions, each of which is stored in a file having a number of fixed sized blocks. Each of the blocks has a first format. Restructuring the physical storage of the table involves changing, to a second format, the format of the blocks of the file in which a partition of the table is stored. Additionally, control data that includes a catalog table and one or more file labels describing the partitions in which the records of the table are grouped, is altered to indicate that the blocks of a partition are enabled to be stored in the second format. Restructuring occurs in phases so as to minimize the inaccessibility of the table being restructured to updates.
|
