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54 lines
1.6 KiB
ReStructuredText
54 lines
1.6 KiB
ReStructuredText
===============
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Database Schema
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===============
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.. sectionauthor:: Bernhard Posselt <dev@bernhard-posselt.com>
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ownCloud uses a database abstraction layer on top of either PDO, depending on the availability of PDO on the server.
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The database schema is inside :file:`appinfo/database.xml` in MDB2's `XML scheme notation <http://www.wiltonhotel.com/_ext/pear/docs/MDB2/docs/xml_schema_documentation.html>`_ where the placeholders \*dbprefix* (\*PREFIX* in your SQL) and \*dbname* can be used for the configured database table prefix and database name.
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An example database XML file would look like this:
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.. code-block:: xml
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<?xml version="1.0" encoding="UTF-8" ?>
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<database>
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<name>*dbname*</name>
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<create>true</create>
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<overwrite>false</overwrite>
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<charset>utf8</charset>
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<table>
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<name>*dbprefix*yourapp_items</name>
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<declaration>
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<field>
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<name>id</name>
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<type>integer</type>
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<default>0</default>
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<notnull>true</notnull>
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<autoincrement>1</autoincrement>
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<length>4</length>
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</field>
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<field>
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<name>user</name>
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<type>text</type>
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<notnull>true</notnull>
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<length>64</length>
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</field>
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<field>
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<name>name</name>
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<type>text</type>
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<notnull>true</notnull>
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<length>100</length>
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</field>
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<field>
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<name>path</name>
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<type>clob</type>
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<notnull>true</notnull>
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</field>
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</declaration>
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</table>
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</database>
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To update the tables used by the app, simply adjust the database.xml file and increase the app version number in :file:`appinfo/version` to trigger an update.
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