count.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: count.so,v 1.4 2001/05/05 01:49:20 bostic Exp $])

m4_ref_title(Access Methods,
    Data item count, @counting data items for a key, am/join, am/curclose)

m4_p([dnl
Once a cursor has been initialized to refer to a particular key in the
database, it can be used to determine the number of data items that are
stored for any particular key.  The m4_ref(dbc_count) method returns
this number of data items.  The returned value is always one, unless
the database supports duplicate data items, in which case it may be any
number of items.])

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