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Berkeley DB: DB->set_bt_minkey
DB->set_bt_minkey
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#include <db.h>
int
DB->set_bt_minkey(DB *db, u_int32_t bt_minkey);
int
DB->get_bt_minkey(DB *db, u_int32_t *bt_minkeyp);
Description: DB->set_bt_minkey
Set the minimum number of key/data pairs intended to be stored on any
single Btree leaf page.
This value is used to determine if key or data items will be stored on
overflow pages instead of Btree leaf pages. For more information on
the specific algorithm used, see Minimum keys per page. The bt_minkey value specified must
be at least 2; if bt_minkey is not explicitly set, a value of
2 is used.
The DB->set_bt_minkey method configures a database, not only operations performed
using the specified DB handle.
The DB->set_bt_minkey method may not be called after the DB->open method is called.
If the database already exists when
DB->open is called, the information specified to DB->set_bt_minkey will
be ignored.
The DB->set_bt_minkey method
returns a non-zero error value on failure
and 0 on success.
Parameters
- bt_minkey
- The bt_minkey parameter is the minimum number of key/data pairs
intended to be stored on any single Btree leaf page.
Errors
The DB->set_bt_minkey method
may fail and return one of the following non-zero errors:
- EINVAL
- If the method was called after DB->open was called; or if an
invalid flag value or parameter was specified.
Description: DB->get_bt_minkey
The DB->get_bt_minkey method returns the minimum number of key/data pairs intended to be stored on any single Btree
leaf page.
The DB->get_bt_minkey method may be called at any time during the life of the
application.
The DB->get_bt_minkey method
returns a non-zero error value on failure
and 0 on success.
Parameters
- bt_minkeyp
- The DB->get_bt_minkey method returns the
minimum number of key/data pairs intended to be stored on any single Btree
leaf page in bt_minkeyp.
Class
DB
See Also
Databases and Related Methods
Copyright (c) 1996-2004 Sleepycat Software, Inc. - All rights reserved.
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