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The REMOVE DBEFILE statement removes the name of the DBEFileSet that the
DBEFile was associated with from SYSTEM.DBEFile.
ISQL or Application Programs
REMOVE DBEFILE DBEFileName FROM DBEFILESET DBEFileSetName
- DBEFileName
is the name of the DBEFile to be removed. The DBEFile must be empty
(contain no tables, long data, or indexes).
- DBEFileSetName
is the name of the DBEFileSet with which the DBEFile is currently
associated.
You must have exclusive access to all tables associated with the
DBEFileSet.
After you remove a DBEFile from a DBFileSet, you can drop the
DBEFile or add it to another DBEFileSet.
Before a DBEFile can be removed from the SYSTEM DBEFileSet, other
users' transactions must complete. Other users must wait until the
transaction that is removing the DBEFile from SYSTEM has
completed.
REMOVE DBEFILE also decreases the number of files
associated with the DBEFileSet shown in the DBEFSNDBEFILES column of
SYSTEM.DBEFileSet by one.
You must have DBA authority to use this statement.
CREATE DBEFILE ThisDBEFile WITH PAGES = 4,
NAME = 'ThisFile', TYPE = TABLE
CREATE DBEFILESET Miscellaneous
ADD DBEFILE ThisDBEFile TO DBEFILESET Miscellaneous
The DBEFile is used to store rows of a new table. When the table needs an
index, one is created as follows:
CREATE DBEFILE ThatDBEFile WITH PAGES = 4,
NAME = 'ThatFile', TYPE = INDEX
ADD DBEFILE ThatDBEFile to DBEFILESET Miscellaneous
When the index is subsequently dropped, its file space can be assigned to
another DBEFileSet.
REMOVE DBEFILE ThatDBEFile FROM DBEFILESET Miscellaneous
ADD DBEFILE ThatDBEFile TO DBEFILESET SYSTEM
ALTER DBEFILE ThisDBEFile SET TYPE = MIXED
Now you can use this DBEFile to store an index later if you need one. All rows
are later deleted from the table, so you can reclaim file space.
REMOVE DBEFILE ThisDBEFile FROM DBEFILESET Miscellaneous
DROP DBEFILE ThisDBEFile
The DBEFileSet definition can now be dropped.
DROP DBEFILESET Miscellaneous
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