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D Glossary
274 U929-J-Z125-9-76
DBDIR
See database directory.
DBH
Database Handler: program (or group of programs) which controls access to
the database(s) of a session and assumes all the attendant administrative
functions.
DBH end
End of the DBH program run. DBH end can be either a session end or a session
abort.
DBH, independent
See independent DBH.
DB key
See database key.
DBH, linked-in
See linked-in DBH.
DBH load parameters
See load parameters (DBH).
DBH start
Start of the DBH program run. DBH start can be either a session start or a session
restart.
DBTT
(Database Key Translation Table) Table from which UDS/SQL can obtain the
page address (act-key) of a record and associated tables by means of the
database key value.
The DBTT for the SSIA-RECORD consists only of the DBTT base. For all other
record types, the DBTT consists of a base table (DBTT base) and possibly of
one or more extension tables (DBTT extents) resulting from an online DBTT
extension or created by BREORG.
DBTT anchor page
Page lying within the realm of the associated DBTT in which the DBTT base and
DBTT extents are administered. Depending on the number of DBTT extents
multiple chained DBTT anchor pages may be required for their administration.
DBTT base
see DBTT