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<!DOCTYPE html>
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<title>IvorySQL :: IvorySQL文档中心</title>
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<a class="nav-link" href="6.3.3.html">RowID</a>
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<a class="nav-link" href="6.3.2.html">OUT 参数</a>
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<a class="nav-link" href="6.3.4.html">%TYPE、%ROWTYPE</a>
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<a class="nav-link" href="7.1.html">1、框架设计</a>
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<a class="nav-link" href="7.2.html">2、GUC框架</a>
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<a class="nav-link" href="7.3.html">3、大小写转换</a>
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<a class="nav-link" href="7.4.html">4、双模式设计</a>
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<a class="nav-link" href="7.5.html">5、兼容Oracle like</a>
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<a class="nav-link" href="7.6.html">6、兼容Oracle匿名块</a>
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<a class="nav-link" href="7.7.html">7、兼容Oracle函数与存储过程</a>
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<a class="nav-link" href="7.8.html">8、内置数据类型与内置函数</a>
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<a class="nav-link" href="7.9.html">9、新增Oracle兼容模式的端口与IP</a>
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<a class="nav-link" href="7.10.html">10、XML函数</a>
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<a class="nav-link" href="7.11.html">11、兼容Oracle sequence</a>
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<a class="nav-link" href="7.12.html">12、包</a>
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<article class="doc">
<div class="sect1">
<h2 id="ivorysql简介"><a class="anchor" href="#ivorysql简介"></a>1. IvorySQL简介</h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="概述"><a class="anchor" href="#概述"></a>1.1. 概述</h3>
<div class="paragraph">
<p>IvorySQL是一款以PostgreSQL为基础进行开发，并且兼容Oracle的开源数据库。</p>
</div>
<div class="paragraph">
<p>IvorySQL社区始终承诺与PostgreSQL数据库保持100%兼容，并且可以直接替换最新版本的PostgreSQL。</p>
</div>
<div class="paragraph">
<p>IvorySQL增加了一个名为 <code>ivorysql.compatible_mode</code> 的GUC参数用以控制IvorySQL的兼容模式，该参数有 <code>oracle</code> 和 <code>pg</code> 两种值。在初始化数据目录的时候，通过指定 <code>-m</code> 参数来指定数据目录的兼容模式，<code>-m pg</code> 则数据目录为PostgreSQL模式，该模式下 <code>ivorysql.compatible_mode</code> 参数将会失效，<code>-m oracle</code> 或者不指定 <code>-m</code> 参数则数据目录为兼容Oracle模式，该模式下 <code>ivorysql.compatible_mode</code> 参数初始值为 <code>oracle</code> 并且不支持部分PostgreSQL的语法，通过 <code>set ivorysql.compatible_mode to pg</code> 就可以使得数据库100%支持PostgreSQL的语法及功能。</p>
</div>
<div class="paragraph">
<p>IvorySQL的亮点之一是PL/iSQL过程语言，它支持Oracle的PL/SQL语法。同时，IvorySQL通过增加与内核绑定的插件 <strong>ivorysql_ora</strong> 来实现兼容Oracle的功能，目前实现的功能包括内置函数、数据类型、系统视图、merge以及GUC参数的增加，未来将会继续以绑定内核的插件的形式来实现新的兼容功能。</p>
</div>
<div class="paragraph">
<p>IvorySQL项目是在Apache 2.0许可证下发布的，社区鼓励且欢迎所有类型的贡献和参与。</p>
</div>
</div>
<div class="sect2">
<h3 id="产品目标和范围"><a class="anchor" href="#产品目标和范围"></a>1.2. 产品目标和范围</h3>
<div class="paragraph">
<p>我们致力于遵守 <a href="https://opensource.com/open-source-way">开源方式</a>的原则，我们坚信建立一个健康和包容的社区。我们坚持认为，好的想法可以来自任何地方。虽然IvorySQL目前的版本主要关注Oracle兼容性功能，但未来的路线图和功能集将由社区以开源方式确定。</p>
</div>
</div>
<div class="sect2">
<h3 id="核心特性"><a class="anchor" href="#核心特性"></a>1.3. 核心特性</h3>
<div class="paragraph">
<p>IvorySQL基于PostgreSQL数据库开发，与Oracle数据库兼容，具有强大的兼容性。适用于PostgreSQL数据库和Oracle数据库场景。</p>
</div>
</div>
<div class="sect2">
<h3 id="竞争优势"><a class="anchor" href="#竞争优势"></a>1.4. 竞争优势</h3>
<div class="ulist">
<ul>
<li>
<p><strong>核心开源</strong>：IvorySQL的核心代码包括兼容功能全部在开源协议下公开，没有厂商的限制。并应用于瀚高股份数据库公司实例，且拥有一个活跃的开发者社区。</p>
</li>
<li>
<p><strong>兼容Oracle</strong>：可以将Oracle数据库迁移到IvorySQL。</p>
</li>
<li>
<p><strong>可定制化</strong>：只需下载代码，并按照你的想法自定义。</p>
</li>
<li>
<p><strong>简单易用</strong>：对系统管理员来说，IvorySQL 大幅降低了管理和维护的代价。对开发者来说，IvorySQL提供了简单的接口、极简的解决方案和与第三方工具的无缝集成。对数据分析专家来说，IvorySQL 提供了便捷的数据访问能力。</p>
</li>
<li>
<p><strong>瀚高支持</strong>：由领先的PostgreSQL数据库提供商瀚高股份提供支持。</p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="技术生态"><a class="anchor" href="#技术生态"></a>1.5. 技术生态</h3>
<div class="paragraph">
<p>IvorySQL基于PostgreSQL，具有完整的SQL、坚如磐石的可靠性和庞大的生态系统。</p>
</div>
</div>
<div class="sect2">
<h3 id="核心应用场景"><a class="anchor" href="#核心应用场景"></a>1.6. 核心应用场景</h3>
<div class="paragraph">
<p>Ivory数据库的主要应用场景：</p>
</div>
<div class="ulist">
<ul>
<li>
<p>企业数据库</p>
<div class="literalblock">
<div class="content">
<pre>如 ERP、交易系统、财务系统涉及资金、客户等信息，数据不能丢失且业务逻辑复杂，选择 IvorySQL 作为数据底层存储，一是可以帮助您在数据一致性前提下提供高可用性，二是可以用简单的编程实现复杂的业务逻辑。</pre>
</div>
</div>
</li>
<li>
<p>含 LBS 的应用</p>
<div class="literalblock">
<div class="content">
<pre>大型游戏、O2O 等应用需要支持世界地图、附近的商家，两个点的距离等能力，PostGIS 增加了对地理对象的支持，允许您以 SQL 运行位置查询，而不需要复杂的编码，帮助您更轻松理顺逻辑，更便捷的实现 LBS，提高用户粘性。</pre>
</div>
</div>
</li>
<li>
<p>数据仓库和大数据</p>
<div class="literalblock">
<div class="content">
<pre>IvorySQL 更多数据类型和强大的计算能力，能够帮助您更简单搭建数据库仓库或大数据分析平台，为企业运营加分。</pre>
</div>
</div>
</li>
<li>
<p>建站或 App</p>
<div class="literalblock">
<div class="content">
<pre>IvorySQL 良好的性能和强大的功能，可以有效的提高网站性能，降低开发难度。</pre>
</div>
</div>
</li>
<li>
<p>数据库迁移</p>
<div class="literalblock">
<div class="content">
<pre>如果需要将Oracle数据库迁移到PostgreSQL数据库，可以直接使用IvorySQL数据库进行迁移。</pre>
</div>
</div>
</li>
</ul>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="主要基本功能"><a class="anchor" href="#主要基本功能"></a>2. 主要、基本功能</h2>
<div class="sectionbody">
<div class="paragraph">
<p>IvorySQL是一个功能强大的开源对象关系数据库管理系统(ORDBMS)。 用于安全地存储数据，支持最佳做法，并允许在处理请求时检索它们。除此之外，还兼容了Oracle的语法，适用于使用Oracle的场景。</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="与oracle的兼容性"><a class="anchor" href="#与oracle的兼容性"></a>3. 与Oracle的兼容性</h2>
<div class="sectionbody">
<div class="ulist">
<ul>
<li>
<p><a href="https://docs.ivorysql.org/cn/ivorysql-doc/v4.5/v4.5/14">ivorysql框架设计</a></p>
</li>
<li>
<p><a href="https://docs.ivorysql.org/cn/ivorysql-doc/v4.5/v4.5/15">GUC框架</a></p>
</li>
<li>
<p><a href="https://docs.ivorysql.org/cn/ivorysql-doc/v4.5/v4.5/16">大小写转换</a></p>
</li>
<li>
<p><a href="https://docs.ivorysql.org/cn/ivorysql-doc/v4.5/v4.5/17">双模式设计</a></p>
</li>
<li>
<p><a href="https://docs.ivorysql.org/cn/ivorysql-doc/v4.5/v4.5/18">兼容Oracle like</a></p>
</li>
<li>
<p><a href="https://docs.ivorysql.org/cn/ivorysql-doc/v4.5/v4.5/19">兼容Oracle匿名块</a></p>
</li>
<li>
<p><a href="https://docs.ivorysql.org/cn/ivorysql-doc/v4.5/v4.5/20">兼容Oracle函数与存储过程</a></p>
</li>
<li>
<p><a href="https://docs.ivorysql.org/cn/ivorysql-doc/v4.5/v4.5/21">内置数据类型与内置函数</a></p>
</li>
<li>
<p><a href="https://docs.ivorysql.org/cn/ivorysql-doc/v4.5/v4.5/22">新增Oracle兼容模式的端口与IP</a></p>
</li>
<li>
<p><a href="https://docs.ivorysql.org/cn/ivorysql-doc/v4.5/v4.5/26">XML函数</a></p>
</li>
<li>
<p><a href="https://docs.ivorysql.org/cn/ivorysql-doc/v4.5/v4.5/27">兼容Oracle sequence</a></p>
</li>
<li>
<p><a href="https://docs.ivorysql.org/cn/ivorysql-doc/v4.5/v4.5/28">包</a></p>
</li>
<li>
<p><a href="https://docs.ivorysql.org/cn/ivorysql-doc/v4.5/v4.5/29">不可见列</a></p>
</li>
</ul>
</div>
</div>
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