HP 3000 Manuals HP 3000 Manuals
Summary of Commands to Maintain the Database DBChange Plus provides specific commands that generate statistics about the database structure to help you determine if there are any structural problems, such as broken chains, incorrect pointer linkages, and inconsistent pointers. Several of the commands correct known problems. The commands used for database maintenance are listed alphabetically in Table 8-1 along with a summary of their functions.
NOTE * Before invoking any of the following commands, you must log on to the system as the database creator, run the DBCPLUS program, and specify the database to be used. Refer to chapter 1, "Introduction to DBChange Plus." * The commands are not actually applied until the DBAPLUS program has been used. Refer to chapter 9, "Applying Changes to the Database Structure."
Table 8-1. Summary of Commands to Maintain the Database ----------------------------------------------------------------------------------------------- | | | | | Command | Keyword | Description | | | | | ----------------------------------------------------------------------------------------------- | | | | | CHECK | BASE | Checks the root file, all data sets, and all paths | | | | in the database for structural integrity and | | | | reports any problems. | | | | | | | PATH | Checks paths for broken chains and incorrect | | | | pointer linkages and reports any problems. | | | | | | | SET | Checks data sets for internal or pointer | | | | inconsistency and reports any problems. | | | | | ----------------------------------------------------------------------------------------------- | | | | | FIX | BASE | Examines all sets and paths in the database and | | | | attempts to correct known problems. Does not fix | | | | root problems. | | | | | | | PATH | Examines paths for broken chains and incorrect | | | | pointer linkages and attempts to correct known | | | | problems. | | | | | | | SET | Examines data sets for internal pointer or | | | | structural inconsistency and attempts to correct | | | | known problems. | | | | | ----------------------------------------------------------------------------------------------- | | | | | REPACK | SET | Rebuilds a detail data set by eliminating deleted | | | | entry gaps and by adjusting pointers. | | | | | -----------------------------------------------------------------------------------------------