Fujitsu UDS/SQL V2.5 사용자 설명서
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Glossary
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rollback
Canceling of all updates effected within a transaction.
RSQ
See record sequence number.
RUNUNIT-ID
See transaction identification.
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schema
Formalized description of all data structures permitted in the database. A
UDS/SQL schema is defined by means of the Schema DDL.
UDS/SQL schema is defined by means of the Schema DDL.
Schema DDL
Formalized language for defining a schema.
Schema Information Area (SIA)
The SIA contains the complete database definition. The DBH loads the SIA into
main memory at the start of DB processing.
main memory at the start of DB processing.
SEARCH KEY
Secondary key
; access paths using secondary keys are created by UDS/SQL by
means of hash routines and multi-level tables.
SEARCH KEY table
Multi-level table
used by UDS/SQL as an access path via a secondary key.
secondary key
Any key which is not a primary key. Used for direct access to a record or a set of
records with the same key values or within a search interval.
records with the same key values or within a search interval.
secondary subtransactions
Subtransactions
that address remote configurations.
sequence number
Identifier in the name of the ALOG files (000000001 - 999999999). The first
ALOG file of a database is always numbered 000000001.
ALOG file of a database is always numbered 000000001.