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提交 fd85a3ad authored 作者: Evgenij Ryazanov's avatar Evgenij Ryazanov
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Remove Comparison to Other Database Engines section

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h2/src/docsrc/html/changelog.html
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......@@ -21,6 +21,8 @@ Change Log
<h2>Next Version (unreleased)</h2>
<ul>
<li>Issue #950: Comparison between databases in README.md and in features.html
</li>
<li>Issue #1549: [RFE] Implement locking modes (select for update)
</li>
<li>PR #1548: Add AsynchronousFileChannel-based experimental FilePathAsync
......
h2/src/docsrc/html/features.html
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......@@ -21,8 +21,6 @@ Features
<a href="#feature_list">
Feature List</a><br />
<a href="#comparison">
Comparison to Other Database Engines</a><br />
<a href="#products_work_with">
H2 in Use</a><br />
<a href="#connection_modes">
......@@ -160,227 +158,6 @@ encrypted using the AES-128 encryption algorithm
</li><li>Well tested (high code coverage, randomized stress tests)
</li></ul>
<h2 id="comparison">Comparison to Other Database Engines</h2>
<p>
This comparison is based on
H2 1.3,
<a href="http://db.apache.org/derby">Apache Derby version 10.8</a>,
<a href="http://hsqldb.org">HSQLDB 2.2</a>,
<a href="https://www.mysql.com/">MySQL 5.5</a>,
<a href="https://www.postgresql.org/">PostgreSQL 9.0</a>.
</p>
<table class="main">
<tr>
<th>Feature</th>
<th>H2</th>
<th>Derby</th>
<th>HSQLDB</th>
<th>MySQL</th>
<th>PostgreSQL</th>
</tr><tr>
<td>Pure Java</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareN">No</td>
<td class="compareN">No</td>
</tr><tr>
<td>Embedded Mode (Java)</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareN">No</td>
<td class="compareN">No</td>
</tr><tr>
<td>In-Memory Mode</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareN">No</td>
<td class="compareN">No</td>
</tr><tr>
</tr><tr>
<td>Explain Plan</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes *12</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Built-in Clustering / Replication</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareN">No</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Encrypted Database</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes *10</td>
<td class="compareY">Yes *10</td>
<td class="compareN">No</td>
<td class="compareN">No</td>
</tr><tr>
<td>Linked Tables</td>
<td class="compareY">Yes</td>
<td class="compareN">No</td>
<td class="compareY">Partially *1</td>
<td class="compareY">Partially *2</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>ODBC Driver</td>
<td class="compareY">Yes</td>
<td class="compareN">No</td>
<td class="compareN">No</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Fulltext Search</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareN">No</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Domains (User-Defined Types)</td>
<td class="compareY">Yes</td>
<td class="compareN">No</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Files per Database</td>
<td class="compareY">Few</td>
<td class="compareN">Many</td>
<td class="compareY">Few</td>
<td class="compareN">Many</td>
<td class="compareN">Many</td>
</tr><tr>
<td>Row Level Locking</td>
<td class="compareY">Yes *9</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes *9</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Multi Version Concurrency</td>
<td class="compareY">Yes</td>
<td class="compareN">No</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Multi-Threaded Processing</td>
<td class="compareN">No *11</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Role Based Security</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes *3</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Updatable Result Sets</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes *7</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Sequences</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareN">No</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Limit and Offset</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes *13</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Window Functions</td>
<td class="compareN">No *15</td>
<td class="compareN">No *15</td>
<td class="compareN">No</td>
<td class="compareN">No</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Temporary Tables</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes *4</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Information Schema</td>
<td class="compareY">Yes</td>
<td class="compareN">No *8</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Computed Columns</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes *6</td>
</tr><tr>
<td>Case Insensitive Columns</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes *14</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes</td>
<td class="compareY">Yes *6</td>
</tr><tr>
<td>Custom Aggregate Functions</td>
<td class="compareY">Yes</td>
<td class="compareN">No</td>
<td class="compareY">Yes</td>
<td class="compareN">No</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>CLOB/BLOB Compression</td>
<td class="compareY">Yes</td>
<td class="compareN">No</td>
<td class="compareN">No</td>
<td class="compareN">No</td>
<td class="compareY">Yes</td>
</tr><tr>
<td>Footprint (jar/dll size)</td>
<td>~1.5 MB *5</td>
<td>~3 MB</td>
<td>~1.5 MB</td>
<td>~4 MB</td>
<td>~6 MB</td>
</tr>
</table>
<p>
*1 HSQLDB supports text tables.<br />
*2 MySQL supports linked MySQL tables under the name 'federated tables'.<br />
*3 Derby support for roles based security and password checking as an option.<br />
*4 Derby only supports global temporary tables.<br />
*5 The default H2 jar file contains debug information, jar files for other databases do not.<br />
*6 PostgreSQL supports functional indexes.<br />
*7 Derby only supports updatable result sets if the query is not sorted.<br />
*8 Derby doesn't support standard compliant information schema tables.<br />
*9 When using MVCC (multi version concurrency).<br />
*10 Derby and HSQLDB
<a href="https://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Electronic_Codebook_(ECB)">don't hide data patterns well</a>.<br />
*11 The MULTI_THREADED option is not enabled by default, and with version 1.3.x not supported when using MVCC.<br />
*12 Derby doesn't support the <code>EXPLAIN</code> statement, but it supports runtime statistics and retrieving statement execution plans.<br />
*13 Derby doesn't support the syntax <code>LIMIT .. [OFFSET ..]</code>, however it supports <code>FETCH FIRST .. ROW[S] ONLY</code>.<br />
*14 Using collations.
*15 Derby and H2 support <code>ROW_NUMBER() OVER()</code>.
</p>
<h2 id="products_work_with">H2 in Use</h2>
<p>
For a list of applications that work with or use H2, see:
......
h2/src/docsrc/html/mainWeb.html
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......@@ -146,9 +146,6 @@ Welcome to H2, the Java SQL database. The main features of H2 are:
<td>~700 KB</td>
</tr>
</table>
<p>
See also the <a href="features.html#comparison">detailed comparison</a>.
</p>
</td></tr>
<tr><td colspan="3" style="border: 0px; background-color: #eee;">
......
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