curput.so

berkeley db 4.6.21的源码。berkeley db是一个简单的数据库管理系统

m4_comment([$Id: curput.so,v 10.18 2003/10/18 19:15:52 bostic Exp $])

m4_ref_title(Access Methods, Storing records with a cursor,
    [@storing records with a cursor, storing records with a @cursor],
    am/curget, am/curdel)

m4_p([dnl
The m4_refT(dbc_put) stores records into the database using a cursor.  In
general, m4_ref(dbc_put) takes a key and inserts the associated data
into the database, at a location controlled by a specified flag.])

m4_p([dnl
There are several flags that you can set to customize storage:])

m4_tagbegin

m4_tag([m4_ref(DB_AFTER)], [dnl
Create a new record, immediately after the record to which the cursor
refers.])

m4_tag([m4_ref(DB_BEFORE)], [dnl
Create a new record, immediately before the record to which the cursor
refers.])

m4_tag([m4_ref(DB_CURRENT)], [dnl
Replace the data part of the record to which the cursor refers.])

m4_tag([m4_ref(DB_KEYFIRST)], [dnl
Create a new record as the first of the duplicate records for the
supplied key.])

m4_tag([m4_ref(DB_KEYLAST)], [dnl
Create a new record, as the last of the duplicate records for the supplied
key.])

m4_tagend

m4_p([dnl
In all cases, the cursor is repositioned by a m4_ref(dbc_put) operation
to point to the newly inserted key/data pair in the database.])

m4_p([dnl
The following is a code example showing a cursor storing two data items
in a database that supports duplicate data items:])

include(ref/am/curput.cs)

m4_page_footer