1<!--$Id: dbc_count.so,v 10.27 2007/10/24 16:06:07 bostic Exp $--> 2<!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> 3<!--See the file LICENSE for redistribution information.--> 4<html> 5<head> 6<title>Berkeley DB: DBcursor->count</title> 7<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> 8<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> 9</head> 10<body bgcolor=white> 11<table width="100%"><tr valign=top> 12<td> 13<b>DBcursor->count</b> 14</td> 15<td align=right> 16<a href="/api_c/api_core.html"><img src="/images/api.gif" alt="API"></a> 17<a href="/ref/toc.html"><img src="/images/ref.gif" alt="Ref"></a></td> 18</tr></table> 19<hr size=1 noshade> 20<tt> 21<b><pre> 22#include <db.h> 23<p> 24int 25DBcursor->count(DBC *DBcursor, db_recno_t *countp, u_int32_t flags); 26</pre></b> 27<hr size=1 noshade> 28<b>Description: DBcursor->count</b> 29<p>The DBcursor->count method returns a count of the number of data items for 30the key to which the cursor refers.</p> 31<p>The DBcursor->count method 32returns a non-zero error value on failure 33and 0 on success. 34</p> 35<b>Parameters</b> <br> 36 <b>countp</b><ul compact><li>The <b>countp</b> parameter references memory into which 37 the count of the number of duplicate data items is copied.</ul> 38 <b>flags</b><ul compact><li>The <b>flags</b> parameter is currently unused, and must be set to 0.</ul> 39<br> 40<br><b>Errors</b> 41<p>The DBcursor->count method 42may fail and return one of the following non-zero errors:</p> 43<br> 44<b>DB_REP_HANDLE_DEAD</b><ul compact><li>The database handle has been invalidated because a replication election 45unrolled a committed transaction.</ul> 46<br> 47<br> 48<b>DB_REP_LOCKOUT</b><ul compact><li>The operation was blocked by client/master synchronization.</ul> 49<br> 50<br> 51<b>EINVAL</b><ul compact><li>If the cursor has not been initialized; or if an 52invalid flag value or parameter was specified.</ul> 53<br> 54<hr size=1 noshade> 55<br><b>Class</b> 56<a href="/api_c/dbc_class.html">DBC</a> 57<br><b>See Also</b> 58<a href="/api_c/dbc_list.html">Database Cursors and Related Methods</a> 59</tt> 60<table width="100%"><tr><td><br></td><td align=right> 61<a href="/api_c/api_core.html"><img src="/images/api.gif" alt="API"></a><a href="/ref/toc.html"><img src="/images/ref.gif" alt="Ref"></a> 62</td></tr></table> 63<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> 64</body> 65</html> 66
