Manual:DatabaseUpdater.php

MediaWiki file: DatabaseUpdater.php
Location:	includes/installer/
Source code:	master • 1.35.2 • 1.31.14
Classes:	DatabaseUpdater

DatabaseUpdater is the class for handling database updates (e.g. adding, modifying, and dropping database tables, fields, and indexes). MysqlUpdater.php , PostgresUpdater.php , SqliteUpdater.php , MssqlUpdater.php , and OracleUpdater.php extend this class, and all five of those files (as well as the tables.sql files for the various database types) potentially need to be revised when a core schema change is made. Extensions usually change the schema by means of LoadExtensionSchemaUpdates hook functions. Either way, SQL patch file(s) need to be created.

Functions

• addExtensionField ($tableName, $columnName, $sqlPath)
• addExtensionIndex ($tableName, $indexName, $sqlPath)
• addExtensionTable ($tableName, $sqlPath)
• addExtensionUpdate (array $update)
• addPostDatabaseUpdateMaintenance ($class)
• dropExtensionField ($tableName, $columnName, $sqlPath)
• dropExtensionIndex ($tableName, $indexName, $sqlPath)
• dropExtensionTable ($tableName, $sqlPath)
• dropTable ($table, $patch=false, $fullpath=false)
• getDB ()
• modifyExtensionField ($tableName, $fieldName, $sqlPath)
• modifyField ($table, $field, $patch, $fullpath=false)