Merge pull request #12695 from owncloud/db-drop-table

Add dropTable to IDBConnection

lib/private/db.php

@@ -263,16 +263,7 @@ class OC_DB {
 	 */
 	public static function dropTable($tableName) {
 		$connection = \OC::$server->getDatabaseConnection();
-		$tableName = OC_Config::getValue('dbtableprefix', 'oc_' ) . trim($tableName);
-
-		$connection->beginTransaction();
-
-		$platform = $connection->getDatabasePlatform();
-		$sql = $platform->getDropTableSQL($platform->quoteIdentifier($tableName));
-
-		$connection->executeQuery($sql);
-
-		$connection->commit();
+		$connection->dropTable($tableName);
 	}
 
 	/**
@@ -334,42 +325,7 @@ class OC_DB {
 	 * @throws \OC\DatabaseException
 	 */
 	public static function tableExists($table) {
-
-		$table = OC_Config::getValue('dbtableprefix', 'oc_' ) . trim($table);
-
-		$dbType = OC_Config::getValue( 'dbtype', 'sqlite' );
-		switch ($dbType) {
-			case 'sqlite':
-			case 'sqlite3':
-				$sql = "SELECT name FROM sqlite_master "
-					.  "WHERE type = 'table' AND name = ? "
-					.  "UNION ALL SELECT name FROM sqlite_temp_master "
-					.  "WHERE type = 'table' AND name = ?";
-				$result = \OC_DB::executeAudited($sql, array($table, $table));
-				break;
-			case 'mysql':
-				$sql = 'SHOW TABLES LIKE ?';
-				$result = \OC_DB::executeAudited($sql, array($table));
-				break;
-			case 'pgsql':
-				$sql = 'SELECT tablename AS table_name, schemaname AS schema_name '
-					.  'FROM pg_tables WHERE schemaname NOT LIKE \'pg_%\' '
-					.  'AND schemaname != \'information_schema\' '
-					.  'AND tablename = ?';
-				$result = \OC_DB::executeAudited($sql, array($table));
-				break;
-			case 'oci':
-				$sql = 'SELECT TABLE_NAME FROM USER_TABLES WHERE TABLE_NAME = ?';
-				$result = \OC_DB::executeAudited($sql, array($table));
-				break;
-			case 'mssql':
-				$sql = 'SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = ?';
-				$result = \OC_DB::executeAudited($sql, array($table));
-				break;
-			default:
-				throw new \OC\DatabaseException("Unknown database type: $dbType");
-		}
-
-		return $result->fetchOne() === $table;
+		$connection = \OC::$server->getDatabaseConnection();
+		return $connection->tableExists($table);
 	}
 }

lib/private/db/connection.php

@@ -164,6 +164,31 @@ class Connection extends \Doctrine\DBAL\Connection implements IDBConnection {
 		return $msg;
 	}
 
+	/**
+	 * Drop a table from the database if it exists
+	 *
+	 * @param string $table table name without the prefix
+	 */
+	public function dropTable($table) {
+		$table = $this->tablePrefix . trim($table);
+		$schema = $this->getSchemaManager();
+		if($schema->tablesExist(array($table))) {
+			$schema->dropTable($table);
+		}
+	}
+
+	/**
+	 * Check if a table exists
+	 *
+	 * @param string $table table name without the prefix
+	 * @return bool
+	 */
+	public function tableExists($table){
+		$table = $this->tablePrefix . trim($table);
+		$schema = $this->getSchemaManager();
+		return $schema->tablesExist(array($table));
+	}
+
 	// internal use
 	/**
 	 * @param string $statement

lib/private/db/oracleconnection.php

@@ -47,4 +47,31 @@ class OracleConnection extends Connection {
 		$identifier = $this->quoteKeys($identifier);
 		return parent::delete($tableName, $identifier);
 	}
+
+	/**
+	 * Drop a table from the database if it exists
+	 *
+	 * @param string $table table name without the prefix
+	 */
+	public function dropTable($table) {
+		$table = $this->tablePrefix . trim($table);
+		$table = $this->quoteIdentifier($table);
+		$schema = $this->getSchemaManager();
+		if($schema->tablesExist(array($table))) {
+			$schema->dropTable($table);
+		}
+	}
+
+	/**
+	 * Check if a table exists
+	 *
+	 * @param string $table table name without the prefix
+	 * @return bool
+	 */
+	public function tableExists($table){
+		$table = $this->tablePrefix . trim($table);
+		$table = $this->quoteIdentifier($table);
+		$schema = $this->getSchemaManager();
+		return $schema->tablesExist(array($table));
+	}
 }

lib/public/idbconnection.php

@@ -158,4 +158,19 @@ interface IDBConnection {
 	 * @return \Doctrine\DBAL\Platforms\AbstractPlatform The database platform.
 	 */
 	public function getDatabasePlatform();
+
+	/**
+	 * Drop a table from the database if it exists
+	 *
+	 * @param string $table table name without the prefix
+	 */
+	public function dropTable($table);
+
+	/**
+	 * Check if a table exists
+	 *
+	 * @param string $table table name without the prefix
+	 * @return bool
+	 */
+	public function tableExists($table);
 }

tests/lib/db/connection.php

@@ -0,0 +1,69 @@
+<?php
+
+/**
+ * Copyright (c) 2014 Robin Appelman <icewind@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace Test\DB;
+
+use Doctrine\DBAL\Platforms\SqlitePlatform;
+use OC\DB\MDB2SchemaManager;
+
+class Connection extends \Test\TestCase {
+	/**
+	 * @var \OCP\IDBConnection
+	 */
+	private $connection;
+
+	public function setUp() {
+		parent::setUp();
+		$this->connection = \OC::$server->getDatabaseConnection();
+	}
+
+	/**
+	 * @param string $table
+	 */
+	public function assertTableExist($table) {
+		if ($this->connection->getDatabasePlatform() instanceof SqlitePlatform) {
+			// sqlite removes the tables after closing the DB
+			$this->assertTrue(true);
+		} else {
+			$this->assertTrue($this->connection->tableExists($table), 'Table ' . $table . ' exists.');
+		}
+	}
+
+	/**
+	 * @param string $table
+	 */
+	public function assertTableNotExist($table) {
+		if ($this->connection->getDatabasePlatform() instanceof SqlitePlatform) {
+			// sqlite removes the tables after closing the DB
+			$this->assertTrue(true);
+		} else {
+			$this->assertFalse($this->connection->tableExists($table), 'Table ' . $table . ' doesnt exists.');
+		}
+	}
+
+	private function makeTestTable() {
+		$schemaManager = new MDB2SchemaManager($this->connection);
+		$schemaManager->createDbFromStructure(__DIR__ . '/testschema.xml');
+	}
+
+	public function testTableExists() {
+		$this->assertTableNotExist('table');
+		$this->makeTestTable();
+		$this->assertTableExist('table');
+	}
+
+	/**
+	 * @depends testTableExists
+	 */
+	public function testDropTable() {
+		$this->assertTableExist('table');
+		$this->connection->dropTable('table');
+		$this->assertTableNotExist('table');
+	}
+}