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diff --git a/bdb/docs/ref/simple_tut/del.html b/bdb/docs/ref/simple_tut/del.html deleted file mode 100644 index ac4d4126033..00000000000 --- a/bdb/docs/ref/simple_tut/del.html +++ /dev/null @@ -1,93 +0,0 @@ -<!--$Id: del.so,v 10.20 2000/03/18 21:43:17 bostic Exp $--> -<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.--> -<!--All rights reserved.--> -<html> -<head> -<title>Berkeley DB Reference Guide: Removing elements from a database</title> -<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> -<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++"> -</head> -<body bgcolor=white> -<table><tr valign=top> -<td><h3><dl><dt>Berkeley DB Reference Guide:<dd>Simple Tutorial</dl></h3></td> -<td width="1%"><a href="../../ref/simple_tut/get.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../ref/toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/simple_tut/close.html"><img src="../../images/next.gif" alt="Next"></a> -</td></tr></table> -<p> -<h1 align=center>Removing elements from a database</h1> -<p>The simplest way to remove elements from a database is the <a href="../../api_c/db_del.html">DB->del</a> -interface. -<p>The <a href="../../api_c/db_del.html">DB->del</a> interface takes four of the same five arguments that -the <a href="../../api_c/db_get.html">DB->get</a> and <a href="../../api_c/db_put.html">DB->put</a> interfaces take. The difference -is that there is no need to specify a data item, as the delete operation -is only interested in the key that you want to remove. -<p><dl compact> -<p><dt>db<dd>The database handle returned by <a href="../../api_c/db_create.html">db_create</a>. -<p><dt>txnid<dd>A transaction ID. -In our simple case, we aren't expecting to recover the database after -application or system crash, so we aren't using transactions, and will -leave this argument unspecified. -<p><dt>key<dd>The key item for the key/data pair that we want to delete from the -database. -<p><dt>flags<dd>Optional flags modifying the underlying behavior of the <a href="../../api_c/db_del.html">DB->del</a> -interface. There are currently no available flags for this interface, -so the flags argument should always be set to 0. -</dl> -<p>Here's what the code to call <a href="../../api_c/db_del.html">DB->del</a> looks like: -<p><blockquote><pre>#include <sys/types.h> -#include <stdio.h> -#include <db.h> -<p> -#define DATABASE "access.db" -<p> -int -main() -{ - DB *dbp; - DBT key, data; - int ret; -<p> - if ((ret = db_create(&dbp, NULL, 0)) != 0) { - fprintf(stderr, "db_create: %s\n", db_strerror(ret)); - exit (1); - } - if ((ret = dbp->open( - dbp, DATABASE, NULL, DB_BTREE, DB_CREATE, 0664)) != 0) { - dbp->err(dbp, ret, "%s", DATABASE); - goto err; - } -<p> - memset(&key, 0, sizeof(key)); - memset(&data, 0, sizeof(data)); - key.data = "fruit"; - key.size = sizeof("fruit"); - data.data = "apple"; - data.size = sizeof("apple"); -<p> - if ((ret = dbp->put(dbp, NULL, &key, &data, 0)) == 0) - printf("db: %s: key stored.\n", (char *)key.data); - else { - dbp->err(dbp, ret, "DB->put"); - goto err; - } -<p> - if ((ret = dbp->get(dbp, NULL, &key, &data, 0)) == 0) - printf("db: %s: key retrieved: data was %s.\n", - (char *)key.data, (char *)data.data); - else { - dbp->err(dbp, ret, "DB->get"); - goto err; - } -<p><b> if ((ret = dbp->del(dbp, NULL, &key, 0)) == 0) - printf("db: %s: key was deleted.\n", (char *)key.data); - else { - dbp->err(dbp, ret, "DB->del"); - goto err; - } -</b></pre></blockquote> -<p>After the <a href="../../api_c/db_del.html">DB->del</a> call returns, the entry referenced by the key -fruit has been removed from the database. -<table><tr><td><br></td><td width="1%"><a href="../../ref/simple_tut/get.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../ref/toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/simple_tut/close.html"><img src="../../images/next.gif" alt="Next"></a> -</td></tr></table> -<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font> -</body> -</html> |