mirror of
https://github.com/yasuhirokimura/db18
synced 2026-06-08 18:29:23 +00:00
Yasuhiro KIMURA
230 lines
9.7 KiB
HTML
230 lines
9.7 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>Binary Large Object Support</title>
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<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB Installation and Build Guide" />
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<link rel="up" href="upgrade_60_toc.html" title="Chapter 11. Upgrading Berkeley DB 11.2.5.3 applications to Berkeley DB 12.1.6.0" />
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<link rel="prev" href="upgrade_60_toc.html" title="Chapter 11. Upgrading Berkeley DB 11.2.5.3 applications to Berkeley DB 12.1.6.0" />
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<link rel="next" href="rep_views.html" title="Replication Views" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 18.1.40</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">Binary Large Object Support</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="upgrade_60_toc.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 11. Upgrading Berkeley DB 11.2.5.3 applications to Berkeley DB 12.1.6.0 </th>
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<td width="20%" align="right"> <a accesskey="n" href="rep_views.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="blob-support"></a>Binary Large Object Support</h2>
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</div>
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</div>
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</div>
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<div class="toc">
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<dl>
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<dt>
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<span class="sect2">
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<a href="blob-support.html#idm140649572585568">New Functions</a>
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</span>
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</dt>
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<dt>
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<span class="sect2">
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<a href="blob-support.html#idm140649572673136">New Flags Accepted by Blob Streaming Interfaces</a>
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</span>
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</dt>
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<dt>
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<span class="sect2">
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<a href="blob-support.html#idm140649572571952">Other New Flags</a>
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</span>
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</dt>
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<dt>
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<span class="sect2">
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<a href="blob-support.html#idm140649572674384">New Pragma</a>
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</span>
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</dt>
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</dl>
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</div>
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<p>
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Berkeley DB now has improved facilities for managing
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binary large objects (blobs). There is a new streaming
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interface to efficiently read and write blobs. There are
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new configuration interfaces to set an optional size
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threshold above which an object is created as a blob, and
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to manage the location of blob storage. A new SQL pragma
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enables SQL users to set a similar optional size threshold
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above which rows are stored internally in Berkeley DB as
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blobs.
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</p>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idm140649572585568"></a>New Functions</h3>
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</div>
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</div>
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</div>
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<div class="itemizedlist">
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<ul type="disc">
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<li>
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<code class="literal">
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<a href="../api_reference/C/dbstream.html" class="olink">DBC->db_stream()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/dbstream_close.html" class="olink">DB_STREAM->close()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/dbstream_read.html" class="olink">DB_STREAM->read()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/dbstream_size.html" class="olink">DB_STREAM->size()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/dbstream_write.html" class="olink">DB_STREAM->write()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/envset_blob_threshold.html" class="olink">DB_ENV->set_blob_threshold()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/envget_blob_threshold.html" class="olink">DB_ENV->get_blob_threshold()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/set_blob_threshold.html" class="olink">DB->set_blob_threshold()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/get_blob_threshold.html" class="olink">DB->get_blob_threshold()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/envset_blob_dir.html" class="olink">DB_ENV->set_blob_dir()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/envget_blob_dir.html" class="olink">DB_ENV->get_blob_dir()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/set_blob_dir.html" class="olink">DB->set_blob_dir()</a>
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</code>
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</li>
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<li>
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<code class="literal">
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<a href="../api_reference/C/get_blob_dir.html" class="olink">DB->get_blob_dir()</a>
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</code>
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</li>
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</ul>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idm140649572673136"></a>New Flags Accepted by Blob Streaming Interfaces</h3>
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</div>
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</div>
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</div>
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<div class="itemizedlist">
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<ul type="disc">
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<li><a href="../api_reference/C/dbstream.html#blobs_DB_STREAM_READ" class="olink">DB_STREAM_READ</a> — accepted by
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<a href="../api_reference/C/dbstream.html" class="olink">DBC->db_stream()</a></li>
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<li><a href="../api_reference/C/dbstream.html#blobs_DB_STREAM_WRITE" class="olink">DB_STREAM_WRITE</a> — accepted by
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<a href="../api_reference/C/dbstream.html" class="olink">DBC->db_stream()</a></li>
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<li><a href="../api_reference/C/dbstream.html#blobs_DB_STREAM_SYNC_WRITE" class="olink">DB_STREAM_SYNC_WRITE</a> — accepted by
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<a href="../api_reference/C/dbstream.html" class="olink">DBC->db_stream()</a> and <a href="../api_reference/C/dbstream_write.html" class="olink">DB_STREAM->write()</a></li>
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</ul>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idm140649572571952"></a>Other New Flags</h3>
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</div>
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</div>
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</div>
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<div class="itemizedlist">
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<ul type="disc">
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<li><a href="../api_reference/C/dbt.html#dbt_DB_DBT_BLOB" class="olink">DB_DBT_BLOB</a> — Used on the data DBT
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accepted by <a href="../api_reference/C/dbput.html" class="olink">DB->put()</a> and <a href="../api_reference/C/dbcput.html" class="olink">DBC->put()</a> to indicate that
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the DBT is a blob.
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</li>
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<li><a href="../api_reference/C/envlog_set_config.html#log_set_config_DB_LOG_BLOB" class="olink">DB_LOG_BLOB</a> — Accepted by
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<a href="../api_reference/C/envlog_set_config.html" class="olink">DB_ENV->log_set_config()</a> and <a href="../api_reference/C/envlog_get_config.html" class="olink">DB_ENV->log_get_config()</a> to
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indicate full logging of blobs.
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</li>
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</ul>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idm140649572674384"></a>New Pragma</h3>
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</div>
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</div>
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</div>
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<div class="itemizedlist">
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<ul type="disc">
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<li>
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<code class="literal">PRAGMA large_record_opt[=n]</code>
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</li>
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</ul>
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</div>
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</div>
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</div>
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<div class="navfooter">
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||
<hr />
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||
<table width="100%" summary="Navigation footer">
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||
<tr>
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||
<td width="40%" align="left"><a accesskey="p" href="upgrade_60_toc.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="upgrade_60_toc.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="rep_views.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">Chapter 11. Upgrading Berkeley DB 11.2.5.3 applications to Berkeley DB 12.1.6.0 </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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||
</td>
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<td width="40%" align="right" valign="top"> Replication Views</td>
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||
</tr>
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||
</table>
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||
</div>
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</body>
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</html>
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