<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>BFILE SQL Objects and Functions</title>
<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
<link rel="start" href="index.html" title="Getting Started with the Oracle Berkeley DB SQL APIs" />
<link rel="up" href="bfile-extension.html" title="Appendix A. Using the BFILE Extension" />
<link rel="prev" href="bfile-extension.html" title="Appendix A. Using the BFILE Extension" />
<link rel="next" href="bfile-c.html" title="BFILE C/C++ Objects and Functions" />
</head>
<body>
<div xmlns="" class="navheader">
<div class="libver">
<p>Library Version 12.1.6.1</p>
</div>
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">BFILE SQL Objects and Functions</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="bfile-extension.html">Prev</a> </td>
<th width="60%" align="center">Appendix A. Using the BFILE Extension</th>
<td width="20%" align="right"> <a accesskey="n" href="bfile-c.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="sect1" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h2 class="title" style="clear: both"><a id="bfile-sql"></a>BFILE SQL Objects and Functions</h2>
</div>
</div>
</div>
<div class="toc">
<dl>
<dt>
<span class="sect2">
<a href="bfile-sql.html#bfile_create_directory">BFILE_CREATE_DIRECTORY</a>
</span>
</dt>
<dt>
<span class="sect2">
<a href="bfile-sql.html#bfile_replace_directory">BFILE_REPLACE_DIRECTORY</a>
</span>
</dt>
<dt>
<span class="sect2">
<a href="bfile-sql.html#bfile_drop_directory">BFILE_DROP_DIRECTORY</a>
</span>
</dt>
<dt>
<span class="sect2">
<a href="bfile-sql.html#bfile_name">BFILE_NAME</a>
</span>
</dt>
<dt>
<span class="sect2">
<a href="bfile-sql.html#bfile_fullpath">BFILE_FULLPATH</a>
</span>
</dt>
<dt>
<span class="sect2">
<a href="bfile-sql.html#bfile_open">BFILE_OPEN</a>
</span>
</dt>
<dt>
<span class="sect2">
<a href="bfile-sql.html#bfile_read">BFILE_READ</a>
</span>
</dt>
<dt>
<span class="sect2">
<a href="bfile-sql.html#bfile_close">BFILE_CLOSE</a>
</span>
</dt>
<dt>
<span class="sect2">
<a href="bfile-sql.html#bfile_size">BFILE_SIZE</a>
</span>
</dt>
</dl>
</div>
<p>
When the BFILE extension is enabled, you can create a
<code class="literal">DIRECTORY</code> object. These objects are required
before you can store a pointer to a file in a
<code class="literal">BFILE</code> column.
</p>
<p>
<code class="literal">DIRECTORY</code> objects are stored
in a special table called <code class="literal">BFILE_DIRECTORY</code>.
This table is automatically created for you when it is needed.
You should <span class="emphasis"><em>not</em></span> manually create this table.
</p>
<p>
You manage <code class="literal">DIRECTORY</code> objects using the
following SQL functions:
</p>
<table class="simplelist" border="0" summary="Simple list">
<tr>
<td>
<a class="xref" href="bfile-sql.html#bfile_create_directory" title="BFILE_CREATE_DIRECTORY">BFILE_CREATE_DIRECTORY</a>
</td>
</tr>
<tr>
<td>
<a class="xref" href="bfile-sql.html#bfile_replace_directory" title="BFILE_REPLACE_DIRECTORY">BFILE_REPLACE_DIRECTORY</a>
</td>
</tr>
<tr>
<td>
<a class="xref" href="bfile-sql.html#bfile_drop_directory" title="BFILE_DROP_DIRECTORY">BFILE_DROP_DIRECTORY</a>
</td>
</tr>
</table>
<p>
The following sections describe the SQL functions that you can
use when the BFILE extension is enabled.
</p>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="bfile_create_directory"></a>BFILE_CREATE_DIRECTORY</h3>
</div>
</div>
</div>
<pre class="programlisting">BFILE_CREATE_DIRECTORY(directory, path)</pre>
<p>
Creates a <code class="literal">DIRECTORY</code> object as a path.
The specified path must not already exist, or
<code class="literal">Directory already exists</code>
is returned.
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="bfile_replace_directory"></a>BFILE_REPLACE_DIRECTORY</h3>
</div>
</div>
</div>
<pre class="programlisting">BFILE_REPLACE_DIRECTORY(directory, path)</pre>
<p>
Replaces the named <code class="literal">DIRECTORY</code> object using the specified path.
If the object does not exist, <code class="literal">Directory does not exist</code>
is returned.
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="bfile_drop_directory"></a>BFILE_DROP_DIRECTORY</h3>
</div>
</div>
</div>
<pre class="programlisting">BFILE_DROP_DIRECTORY(directory)</pre>
<p>
Drops the named <code class="literal">DIRECTORY</code> object. If
the object does not exist,
<code class="literal">Directory does not exist</code> is returned.
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="bfile_name"></a>BFILE_NAME</h3>
</div>
</div>
</div>
<pre class="programlisting">BFILE_NAME(directory, filename)</pre>
<p>
Returns the BFILE locator.
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="bfile_fullpath"></a>BFILE_FULLPATH</h3>
</div>
</div>
</div>
<pre class="programlisting">BFILE_FULLPATH(column)</pre>
<p>
Returns the full path.
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="bfile_open"></a>BFILE_OPEN</h3>
</div>
</div>
</div>
<pre class="programlisting">BFILE_OPEN(column)</pre>
<p>
Extracts the directory and file names from the BFILE
locator, and then opens that file. On success, a BFILE
handle is returned. Otherwise, <code class="literal">0</code>
is returned.
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="bfile_read"></a>BFILE_READ</h3>
</div>
</div>
</div>
<pre class="programlisting">BFILE_READ(BFILE handle, amt, offset)</pre>
<p>
Reads at most <code class="literal">amt</code> data from the BFILE
handle, starting at <code class="literal">offset</code>. On success,
<code class="literal">Data</code> is returned. Otherwise,
<code class="literal">0</code> is returned to indicate that no more
valid data is available.
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="bfile_close"></a>BFILE_CLOSE</h3>
</div>
</div>
</div>
<pre class="programlisting">BFILE_CLOSE(BFILE handle)</pre>
<p>
Closes the BFILE handle.
</p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="bfile_size"></a>BFILE_SIZE</h3>
</div>
</div>
</div>
<pre class="programlisting">BFILE_SIZE(column)</pre>
<p>
Returns the size of the BFILE. On success, the size is
returned. Otherwise, -1 is returned.
</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="bfile-extension.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="bfile-extension.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="bfile-c.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">Appendix A. Using the BFILE Extension </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> BFILE C/C++ Objects and Functions</td>
</tr>
</table>
</div>
</body>
</html>
