fix(db): Promote the use of `getDatabaseProvider` to reduce the impage of removed upstream platforms

Signed-off-by: Joas Schilling <coding@schilljs.com>

19 files changed, 67 insertions, 92 deletions

diff --git a/apps/dav/lib/Migration/CalDAVRemoveEmptyValue.php b/apps/dav/lib/Migration/CalDAVRemoveEmptyValue.php
index cbce847a298..c7f57dcb117 100644
--- a/apps/dav/lib/Migration/CalDAVRemoveEmptyValue.php
+++ b/apps/dav/lib/Migration/CalDAVRemoveEmptyValue.php
@@ -5,7 +5,6 @@
  */
 namespace OCA\DAV\Migration;
 
-use Doctrine\DBAL\Platforms\OraclePlatform;
 use OCA\DAV\CalDAV\CalDavBackend;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IDBConnection;
@@ -75,7 +74,7 @@ class CalDAVRemoveEmptyValue implements IRepairStep {
 	}
 
 	protected function getInvalidObjects($pattern) {
-		if ($this->db->getDatabasePlatform() instanceof OraclePlatform) {
+		if ($this->db->getDatabaseProvider() === IDBConnection::PLATFORM_ORACLE) {
 			$rows = [];
 			$chunkSize = 500;
 			$query = $this->db->getQueryBuilder();
diff --git a/apps/settings/tests/SetupChecks/SupportedDatabaseTest.php b/apps/settings/tests/SetupChecks/SupportedDatabaseTest.php
index 2492379b557..0ba1621c5fe 100644
--- a/apps/settings/tests/SetupChecks/SupportedDatabaseTest.php
+++ b/apps/settings/tests/SetupChecks/SupportedDatabaseTest.php
@@ -8,7 +8,6 @@ declare(strict_types=1);
  */
 namespace OCA\Settings\Tests;
 
-use Doctrine\DBAL\Platforms\SqlitePlatform;
 use OCA\Settings\SetupChecks\SupportedDatabase;
 use OCP\IDBConnection;
 use OCP\IL10N;
@@ -41,8 +40,7 @@ class SupportedDatabaseTest extends TestCase {
 	}
 
 	public function testPass(): void {
-		$platform = $this->connection->getDatabasePlatform();
-		if ($platform instanceof SqlitePlatform) {
+		if ($this->connection->getDatabaseProvider() === IDBConnection::PLATFORM_SQLITE) {
 			/** SQlite always gets a warning */
 			$this->assertEquals(SetupResult::WARNING, $this->check->run()->getSeverity());
 		} else {
diff --git a/apps/user_ldap/lib/Mapping/AbstractMapping.php b/apps/user_ldap/lib/Mapping/AbstractMapping.php
index c243731eaf7..79d23b8d618 100644
--- a/apps/user_ldap/lib/Mapping/AbstractMapping.php
+++ b/apps/user_ldap/lib/Mapping/AbstractMapping.php
@@ -8,9 +8,9 @@
 namespace OCA\User_LDAP\Mapping;
 
 use Doctrine\DBAL\Exception;
-use Doctrine\DBAL\Platforms\SqlitePlatform;
 use OCP\DB\IPreparedStatement;
 use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\IDBConnection;
 use Psr\Log\LoggerInterface;
 
 /**
@@ -216,7 +216,7 @@ abstract class AbstractMapping {
 	public function getListOfIdsByDn(array $fdns): array {
 		$totalDBParamLimit = 65000;
 		$sliceSize = 1000;
-		$maxSlices = $this->dbc->getDatabasePlatform() instanceof SqlitePlatform ? 9 : $totalDBParamLimit / $sliceSize;
+		$maxSlices = $this->dbc->getDatabaseProvider() === IDBConnection::PLATFORM_SQLITE ? 9 : $totalDBParamLimit / $sliceSize;
 		$results = [];
 
 		$slice = 1;
diff --git a/core/Command/Db/ConvertFilecacheBigInt.php b/core/Command/Db/ConvertFilecacheBigInt.php
index 5f3e790e9ce..d16e6d30231 100644
--- a/core/Command/Db/ConvertFilecacheBigInt.php
+++ b/core/Command/Db/ConvertFilecacheBigInt.php
@@ -5,11 +5,11 @@
  */
 namespace OC\Core\Command\Db;
 
-use Doctrine\DBAL\Platforms\SqlitePlatform;
 use Doctrine\DBAL\Types\Type;
 use OC\DB\Connection;
 use OC\DB\SchemaWrapper;
 use OCP\DB\Types;
+use OCP\IDBConnection;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
@@ -53,7 +53,7 @@ class ConvertFilecacheBigInt extends Command {
 
 	protected function execute(InputInterface $input, OutputInterface $output): int {
 		$schema = new SchemaWrapper($this->connection);
-		$isSqlite = $this->connection->getDatabasePlatform() instanceof SqlitePlatform;
+		$isSqlite = $this->connection->getDatabaseProvider() === IDBConnection::PLATFORM_SQLITE;
 		$updates = [];
 
 		$tables = static::getColumnsByTable();
diff --git a/core/Command/Db/ConvertMysqlToMB4.php b/core/Command/Db/ConvertMysqlToMB4.php
index 679cdd5f616..618e15de3f4 100644
--- a/core/Command/Db/ConvertMysqlToMB4.php
+++ b/core/Command/Db/ConvertMysqlToMB4.php
@@ -5,7 +5,6 @@
  */
 namespace OC\Core\Command\Db;
 
-use Doctrine\DBAL\Platforms\MySQLPlatform;
 use OC\DB\MySqlTools;
 use OC\Migration\ConsoleOutput;
 use OC\Repair\Collation;
@@ -34,7 +33,7 @@ class ConvertMysqlToMB4 extends Command {
 	}
 
 	protected function execute(InputInterface $input, OutputInterface $output): int {
-		if (!$this->connection->getDatabasePlatform() instanceof MySQLPlatform) {
+		if ($this->connection->getDatabaseProvider() !== IDBConnection::PLATFORM_MYSQL) {
 			$output->writeln("This command is only valid for MySQL/MariaDB databases.");
 			return 1;
 		}
diff --git a/core/Migrations/Version13000Date20170718121200.php b/core/Migrations/Version13000Date20170718121200.php
index c485e025c37..3985bdaeb57 100644
--- a/core/Migrations/Version13000Date20170718121200.php
+++ b/core/Migrations/Version13000Date20170718121200.php
@@ -5,7 +5,6 @@
  */
 namespace OC\Core\Migrations;
 
-use Doctrine\DBAL\Platforms\PostgreSQL94Platform;
 use OCP\DB\ISchemaWrapper;
 use OCP\DB\Types;
 use OCP\IDBConnection;
@@ -238,7 +237,7 @@ class Version13000Date20170718121200 extends SimpleMigrationStep {
 			$table->addIndex(['name'], 'fs_name_hash');
 			$table->addIndex(['mtime'], 'fs_mtime');
 			$table->addIndex(['size'], 'fs_size');
-			if (!$schema->getDatabasePlatform() instanceof PostgreSQL94Platform) {
+			if ($this->connection->getDatabaseProvider() !== IDBConnection::PLATFORM_POSTGRES) {
 				$table->addIndex(['storage', 'path'], 'fs_storage_path_prefix', [], ['lengths' => [null, 64]]);
 			}
 		}
diff --git a/lib/private/AllConfig.php b/lib/private/AllConfig.php
index d05fe440202..58eee772fbf 100644
--- a/lib/private/AllConfig.php
+++ b/lib/private/AllConfig.php
@@ -6,7 +6,6 @@
  */
 namespace OC;
 
-use Doctrine\DBAL\Platforms\OraclePlatform;
 use OCP\Cache\CappedMemoryCache;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IConfig;
@@ -470,7 +469,7 @@ class AllConfig implements IConfig {
 		$this->fixDIInit();
 
 		$qb = $this->connection->getQueryBuilder();
-		$configValueColumn = ($this->connection->getDatabasePlatform() instanceof OraclePlatform)
+		$configValueColumn = ($this->connection->getDatabaseProvider() === IDBConnection::PLATFORM_ORACLE)
 			? $qb->expr()->castColumn('configvalue', IQueryBuilder::PARAM_STR)
 			: 'configvalue';
 		$result = $qb->select('userid')
@@ -509,7 +508,7 @@ class AllConfig implements IConfig {
 		}
 
 		$qb = $this->connection->getQueryBuilder();
-		$configValueColumn = ($this->connection->getDatabasePlatform() instanceof OraclePlatform)
+		$configValueColumn = ($this->connection->getDatabaseProvider() === IDBConnection::PLATFORM_ORACLE)
 			? $qb->expr()->castColumn('configvalue', IQueryBuilder::PARAM_STR)
 			: 'configvalue';
 
diff --git a/lib/private/BackgroundJob/JobList.php b/lib/private/BackgroundJob/JobList.php
index 201263320e3..5aaf14d62e7 100644
--- a/lib/private/BackgroundJob/JobList.php
+++ b/lib/private/BackgroundJob/JobList.php
@@ -7,7 +7,6 @@
  */
 namespace OC\BackgroundJob;
 
-use Doctrine\DBAL\Platforms\MySQLPlatform;
 use OCP\AppFramework\QueryException;
 use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\AutoloadNotAllowedException;
@@ -98,7 +97,7 @@ class JobList implements IJobList {
 
 		// Add galera safe delete chunking if using mysql
 		// Stops us hitting wsrep_max_ws_rows when large row counts are deleted
-		if ($this->connection->getDatabasePlatform() instanceof MySQLPlatform) {
+		if ($this->connection->getDatabaseProvider() === IDBConnection::PLATFORM_MYSQL) {
 			// Then use chunked delete
 			$max = IQueryBuilder::MAX_ROW_DELETION;
 
diff --git a/lib/private/DB/Connection.php b/lib/private/DB/Connection.php
index c24754a52bd..7aa3a020113 100644
--- a/lib/private/DB/Connection.php
+++ b/lib/private/DB/Connection.php
@@ -17,6 +17,7 @@ use Doctrine\DBAL\Exception;
 use Doctrine\DBAL\Exception\ConnectionLost;
 use Doctrine\DBAL\Platforms\MySQLPlatform;
 use Doctrine\DBAL\Platforms\OraclePlatform;
+use Doctrine\DBAL\Platforms\PostgreSQLPlatform;
 use Doctrine\DBAL\Platforms\SqlitePlatform;
 use Doctrine\DBAL\Result;
 use Doctrine\DBAL\Schema\Schema;
@@ -25,6 +26,7 @@ use OC\DB\QueryBuilder\QueryBuilder;
 use OC\SystemConfig;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\Diagnostics\IEventLogger;
+use OCP\IDBConnection;
 use OCP\IRequestId;
 use OCP\PreConditionNotMetException;
 use OCP\Profiler\IProfiler;
@@ -729,4 +731,22 @@ class Connection extends PrimaryReadReplicaConnection {
 	private function getConnectionName(): string {
 		return $this->isConnectedToPrimary() ? 'primary' : 'replica';
 	}
+
+	/**
+	 * @return IDBConnection::PLATFORM_MYSQL|IDBConnection::PLATFORM_ORACLE|IDBConnection::PLATFORM_POSTGRES|IDBConnection::PLATFORM_SQLITE
+	 */
+	public function getDatabaseProvider(): string {
+		$platform = $this->getDatabasePlatform();
+		if ($platform instanceof MySQLPlatform) {
+			return IDBConnection::PLATFORM_MYSQL;
+		} elseif ($platform instanceof OraclePlatform) {
+			return IDBConnection::PLATFORM_ORACLE;
+		} elseif ($platform instanceof PostgreSQLPlatform) {
+			return IDBConnection::PLATFORM_POSTGRES;
+		} elseif ($platform instanceof SqlitePlatform) {
+			return IDBConnection::PLATFORM_SQLITE;
+		} else {
+			throw new \Exception('Database ' . $platform::class . ' not supported');
+		}
+	}
 }
diff --git a/lib/private/DB/ConnectionAdapter.php b/lib/private/DB/ConnectionAdapter.php
index 86a901a7de3..8a919696eaa 100644
--- a/lib/private/DB/ConnectionAdapter.php
+++ b/lib/private/DB/ConnectionAdapter.php
@@ -10,10 +10,6 @@ namespace OC\DB;
 
 use Doctrine\DBAL\Exception;
 use Doctrine\DBAL\Platforms\AbstractPlatform;
-use Doctrine\DBAL\Platforms\MySQLPlatform;
-use Doctrine\DBAL\Platforms\OraclePlatform;
-use Doctrine\DBAL\Platforms\PostgreSQLPlatform;
-use Doctrine\DBAL\Platforms\SqlitePlatform;
 use Doctrine\DBAL\Schema\Schema;
 use OC\DB\Exceptions\DbalException;
 use OCP\DB\IPreparedStatement;
@@ -230,18 +226,10 @@ class ConnectionAdapter implements IDBConnection {
 		return $this->inner;
 	}
 
+	/**
+	 * @return self::PLATFORM_MYSQL|self::PLATFORM_ORACLE|self::PLATFORM_POSTGRES|self::PLATFORM_SQLITE
+	 */
 	public function getDatabaseProvider(): string {
-		$platform = $this->inner->getDatabasePlatform();
-		if ($platform instanceof MySQLPlatform) {
-			return IDBConnection::PLATFORM_MYSQL;
-		} elseif ($platform instanceof OraclePlatform) {
-			return IDBConnection::PLATFORM_ORACLE;
-		} elseif ($platform instanceof PostgreSQLPlatform) {
-			return IDBConnection::PLATFORM_POSTGRES;
-		} elseif ($platform instanceof SqlitePlatform) {
-			return IDBConnection::PLATFORM_SQLITE;
-		} else {
-			throw new \Exception('Database ' . $platform::class . ' not supported');
-		}
+		return $this->inner->getDatabaseProvider();
 	}
 }
diff --git a/lib/private/DB/MigrationService.php b/lib/private/DB/MigrationService.php
index 19d1b240736..0a3b0d1dcc7 100644
--- a/lib/private/DB/MigrationService.php
+++ b/lib/private/DB/MigrationService.php
@@ -6,20 +6,19 @@
  */
 namespace OC\DB;
 
-use Doctrine\DBAL\Platforms\OraclePlatform;
-use Doctrine\DBAL\Platforms\PostgreSQL94Platform;
 use Doctrine\DBAL\Schema\Index;
 use Doctrine\DBAL\Schema\Schema;
 use Doctrine\DBAL\Schema\SchemaException;
 use Doctrine\DBAL\Schema\Sequence;
 use Doctrine\DBAL\Schema\Table;
-use Doctrine\DBAL\Types\Types;
 use OC\App\InfoParser;
 use OC\IntegrityCheck\Helpers\AppLocator;
 use OC\Migration\SimpleOutput;
 use OCP\AppFramework\App;
 use OCP\AppFramework\QueryException;
 use OCP\DB\ISchemaWrapper;
+use OCP\DB\Types;
+use OCP\IDBConnection;
 use OCP\Migration\IMigrationStep;
 use OCP\Migration\IOutput;
 use OCP\Server;
@@ -599,7 +598,7 @@ class MigrationService {
 				$indexName = strtolower($primaryKey->getName());
 				$isUsingDefaultName = $indexName === 'primary';
 
-				if ($this->connection->getDatabasePlatform() instanceof PostgreSQL94Platform) {
+				if ($this->connection->getDatabaseProvider() === IDBConnection::PLATFORM_POSTGRES) {
 					$defaultName = $table->getName() . '_pkey';
 					$isUsingDefaultName = strtolower($defaultName) === $indexName;
 
@@ -609,7 +608,7 @@ class MigrationService {
 							return $sequence->getName() !== $sequenceName;
 						});
 					}
-				} elseif ($this->connection->getDatabasePlatform() instanceof OraclePlatform) {
+				} elseif ($this->connection->getDatabaseProvider() === IDBConnection::PLATFORM_ORACLE) {
 					$defaultName = $table->getName() . '_seq';
 					$isUsingDefaultName = strtolower($defaultName) === $indexName;
 				}
diff --git a/lib/private/DB/QueryBuilder/QueryBuilder.php b/lib/private/DB/QueryBuilder/QueryBuilder.php
index 81d8b1e7a1a..529b88199e6 100644
--- a/lib/private/DB/QueryBuilder/QueryBuilder.php
+++ b/lib/private/DB/QueryBuilder/QueryBuilder.php
@@ -7,14 +7,9 @@
  */
 namespace OC\DB\QueryBuilder;
 
-use Doctrine\DBAL\Platforms\MySQLPlatform;
-use Doctrine\DBAL\Platforms\OraclePlatform;
-use Doctrine\DBAL\Platforms\PostgreSQL94Platform;
-use Doctrine\DBAL\Platforms\SqlitePlatform;
 use Doctrine\DBAL\Query\QueryException;
 use OC\DB\ConnectionAdapter;
 use OC\DB\Exceptions\DbalException;
-use OC\DB\QueryBuilder\ExpressionBuilder\ExpressionBuilder;
 use OC\DB\QueryBuilder\ExpressionBuilder\MySqlExpressionBuilder;
 use OC\DB\QueryBuilder\ExpressionBuilder\OCIExpressionBuilder;
 use OC\DB\QueryBuilder\ExpressionBuilder\PgSqlExpressionBuilder;
@@ -96,20 +91,12 @@ class QueryBuilder implements IQueryBuilder {
 	 * @return \OCP\DB\QueryBuilder\IExpressionBuilder
 	 */
 	public function expr() {
-		if ($this->connection->getDatabasePlatform() instanceof OraclePlatform) {
-			return new OCIExpressionBuilder($this->connection, $this);
-		}
-		if ($this->connection->getDatabasePlatform() instanceof PostgreSQL94Platform) {
-			return new PgSqlExpressionBuilder($this->connection, $this);
-		}
-		if ($this->connection->getDatabasePlatform() instanceof MySQLPlatform) {
-			return new MySqlExpressionBuilder($this->connection, $this);
-		}
-		if ($this->connection->getDatabasePlatform() instanceof SqlitePlatform) {
-			return new SqliteExpressionBuilder($this->connection, $this);
-		}
-
-		return new ExpressionBuilder($this->connection, $this);
+		return match($this->connection->getDatabaseProvider()) {
+			IDBConnection::PLATFORM_ORACLE => new OCIExpressionBuilder($this->connection, $this),
+			IDBConnection::PLATFORM_POSTGRES => new PgSqlExpressionBuilder($this->connection, $this),
+			IDBConnection::PLATFORM_MYSQL => new MySqlExpressionBuilder($this->connection, $this),
+			IDBConnection::PLATFORM_SQLITE => new SqliteExpressionBuilder($this->connection, $this),
+		};
 	}
 
 	/**
@@ -129,17 +116,12 @@ class QueryBuilder implements IQueryBuilder {
 	 * @return \OCP\DB\QueryBuilder\IFunctionBuilder
 	 */
 	public function func() {
-		if ($this->connection->getDatabasePlatform() instanceof OraclePlatform) {
-			return new OCIFunctionBuilder($this->connection, $this, $this->helper);
-		}
-		if ($this->connection->getDatabasePlatform() instanceof SqlitePlatform) {
-			return new SqliteFunctionBuilder($this->connection, $this, $this->helper);
-		}
-		if ($this->connection->getDatabasePlatform() instanceof PostgreSQL94Platform) {
-			return new PgSqlFunctionBuilder($this->connection, $this, $this->helper);
-		}
-
-		return new FunctionBuilder($this->connection, $this, $this->helper);
+		return match($this->connection->getDatabaseProvider()) {
+			IDBConnection::PLATFORM_ORACLE => new OCIFunctionBuilder($this->connection, $this, $this->helper),
+			IDBConnection::PLATFORM_POSTGRES => new PgSqlFunctionBuilder($this->connection, $this, $this->helper),
+			IDBConnection::PLATFORM_MYSQL => new FunctionBuilder($this->connection, $this, $this->helper),
+			IDBConnection::PLATFORM_SQLITE => new SqliteFunctionBuilder($this->connection, $this, $this->helper),
+		};
 	}
 
 	/**
diff --git a/lib/private/Repair/Collation.php b/lib/private/Repair/Collation.php
index 0affb3b1ca9..a01a684151b 100644
--- a/lib/private/Repair/Collation.php
+++ b/lib/private/Repair/Collation.php
@@ -8,7 +8,6 @@
 namespace OC\Repair;
 
 use Doctrine\DBAL\Exception\DriverException;
-use Doctrine\DBAL\Platforms\MySQLPlatform;
 use OCP\IConfig;
 use OCP\IDBConnection;
 use OCP\Migration\IOutput;
@@ -50,7 +49,7 @@ class Collation implements IRepairStep {
 	 * Fix mime types
 	 */
 	public function run(IOutput $output) {
-		if (!$this->connection->getDatabasePlatform() instanceof MySQLPlatform) {
+		if ($this->connection->getDatabaseProvider() !== IDBConnection::PLATFORM_MYSQL) {
 			$output->info('Not a mysql database -> nothing to do');
 			return;
 		}
diff --git a/lib/public/IDBConnection.php b/lib/public/IDBConnection.php
index a5df85896e2..09bd1a564cd 100644
--- a/lib/public/IDBConnection.php
+++ b/lib/public/IDBConnection.php
@@ -278,6 +278,7 @@ interface IDBConnection {
 	 *
 	 * @return \Doctrine\DBAL\Platforms\AbstractPlatform The database platform.
 	 * @since 8.0.0
+	 * @deprecated 30.0.0 Please use {@see self::getDatabaseProvider()} and compare to self::PLATFORM_* constants
 	 */
 	public function getDatabasePlatform();
 
@@ -341,7 +342,7 @@ interface IDBConnection {
 	 * Returns the database provider name
 	 * @link https://github.com/nextcloud/server/issues/30877
 	 * @since 28.0.0
-	 * @return IDBConnection::PLATFORM_*
+	 * @return self::PLATFORM_MYSQL|self::PLATFORM_ORACLE|self::PLATFORM_POSTGRES|self::PLATFORM_SQLITE
 	 */
 	public function getDatabaseProvider(): string;
 }
diff --git a/tests/lib/DB/MigrationsTest.php b/tests/lib/DB/MigrationsTest.php
index 6cd489258bf..2bdd705ff5d 100644
--- a/tests/lib/DB/MigrationsTest.php
+++ b/tests/lib/DB/MigrationsTest.php
@@ -8,8 +8,6 @@
 
 namespace Test\DB;
 
-use Doctrine\DBAL\Platforms\OraclePlatform;
-use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
 use Doctrine\DBAL\Schema\Column;
 use Doctrine\DBAL\Schema\ForeignKeyConstraint;
 use Doctrine\DBAL\Schema\Index;
@@ -326,9 +324,9 @@ class MigrationsTest extends \Test\TestCase {
 
 	public function testEnsureOracleConstraintsValidWithPrimaryKeyDefault() {
 		$defaultName = 'PRIMARY';
-		if ($this->db->getDatabasePlatform() instanceof PostgreSqlPlatform) {
+		if ($this->db->getDatabaseProvider() === IDBConnection::PLATFORM_POSTGRES) {
 			$defaultName = \str_repeat('a', 26) . '_' . \str_repeat('b', 30) . '_seq';
-		} elseif ($this->db->getDatabasePlatform() instanceof OraclePlatform) {
+		} elseif ($this->db->getDatabaseProvider() === IDBConnection::PLATFORM_ORACLE) {
 			$defaultName = \str_repeat('a', 26) . '_seq';
 		}
 
@@ -407,9 +405,9 @@ class MigrationsTest extends \Test\TestCase {
 		$this->expectException(\InvalidArgumentException::class);
 
 		$defaultName = 'PRIMARY';
-		if ($this->db->getDatabasePlatform() instanceof PostgreSqlPlatform) {
+		if ($this->db->getDatabaseProvider() === IDBConnection::PLATFORM_POSTGRES) {
 			$defaultName = \str_repeat('a', 27) . '_' . \str_repeat('b', 30) . '_seq';
-		} elseif ($this->db->getDatabasePlatform() instanceof OraclePlatform) {
+		} elseif ($this->db->getDatabaseProvider() === IDBConnection::PLATFORM_ORACLE) {
 			$defaultName = \str_repeat('a', 27) . '_seq';
 		}
 
diff --git a/tests/lib/DB/MigratorTest.php b/tests/lib/DB/MigratorTest.php
index eaa6540b93b..d12b70725ed 100644
--- a/tests/lib/DB/MigratorTest.php
+++ b/tests/lib/DB/MigratorTest.php
@@ -10,8 +10,6 @@ namespace Test\DB;
 
 use Doctrine\DBAL\Exception;
 use Doctrine\DBAL\ParameterType;
-use Doctrine\DBAL\Platforms\OraclePlatform;
-use Doctrine\DBAL\Platforms\SqlitePlatform;
 use Doctrine\DBAL\Schema\Schema;
 use Doctrine\DBAL\Schema\SchemaConfig;
 use OC\DB\Migrator;
@@ -19,7 +17,7 @@ use OC\DB\OracleMigrator;
 use OC\DB\SQLiteMigrator;
 use OCP\DB\Types;
 use OCP\IConfig;
-use OCP\Security\ISecureRandom;
+use OCP\IDBConnection;
 
 /**
  * Class MigratorTest
@@ -56,12 +54,10 @@ class MigratorTest extends \Test\TestCase {
 	}
 
 	private function getMigrator(): Migrator {
-		$platform = $this->connection->getDatabasePlatform();
-		$random = \OC::$server->get(ISecureRandom::class);
 		$dispatcher = \OC::$server->get(\OCP\EventDispatcher\IEventDispatcher::class);
-		if ($platform instanceof SqlitePlatform) {
+		if ($this->connection->getDatabaseProvider() === IDBConnection::PLATFORM_SQLITE) {
 			return new SQLiteMigrator($this->connection, $this->config, $dispatcher);
-		} elseif ($platform instanceof OraclePlatform) {
+		} elseif ($this->connection->getDatabaseProvider() === IDBConnection::PLATFORM_ORACLE) {
 			return new OracleMigrator($this->connection, $this->config, $dispatcher);
 		}
 		return new Migrator($this->connection, $this->config, $dispatcher);
@@ -300,7 +296,7 @@ class MigratorTest extends \Test\TestCase {
 		$migrator = $this->getMigrator();
 		$migrator->migrate($startSchema);
 
-		if ($oracleThrows && $this->connection->getDatabasePlatform() instanceof OraclePlatform) {
+		if ($oracleThrows && $this->connection->getDatabaseProvider() === IDBConnection::PLATFORM_ORACLE) {
 			// Oracle can not store false|empty string in notnull columns
 			$this->expectException(\Doctrine\DBAL\Exception\NotNullConstraintViolationException::class);
 		}
diff --git a/tests/lib/DB/OCPostgreSqlPlatformTest.php b/tests/lib/DB/OCPostgreSqlPlatformTest.php
index 4f83e866a7c..3ed420df501 100644
--- a/tests/lib/DB/OCPostgreSqlPlatformTest.php
+++ b/tests/lib/DB/OCPostgreSqlPlatformTest.php
@@ -7,7 +7,7 @@
 
 namespace Test\DB;
 
-use Doctrine\DBAL\Platforms\PostgreSQL100Platform;
+use Doctrine\DBAL\Platforms\PostgreSQLPlatform;
 use Doctrine\DBAL\Schema\Comparator;
 use Doctrine\DBAL\Schema\Schema;
 use Doctrine\DBAL\Types\Types;
@@ -24,7 +24,7 @@ use Doctrine\DBAL\Types\Types;
  */
 class OCPostgreSqlPlatformTest extends \Test\TestCase {
 	public function testAlterBigint() {
-		$platform = new PostgreSQL100Platform();
+		$platform = new PostgreSQLPlatform();
 		$sourceSchema = new Schema();
 		$targetSchema = new Schema();
 
diff --git a/tests/lib/Files/Cache/CacheTest.php b/tests/lib/Files/Cache/CacheTest.php
index faecbf54491..a36607eb965 100644
--- a/tests/lib/Files/Cache/CacheTest.php
+++ b/tests/lib/Files/Cache/CacheTest.php
@@ -7,12 +7,12 @@
 
 namespace Test\Files\Cache;
 
-use Doctrine\DBAL\Platforms\MySqlPlatform;
 use OC\Files\Cache\Cache;
 use OC\Files\Search\SearchComparison;
 use OC\Files\Search\SearchQuery;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Files\Search\ISearchComparison;
+use OCP\IDBConnection;
 use OCP\IUser;
 
 class LongId extends \OC\Files\Storage\Temporary {
@@ -142,7 +142,7 @@ class CacheTest extends \Test\TestCase {
 		if (strpos($folder, 'F09F9890')) {
 			// 4 byte UTF doesn't work on mysql
 			$params = \OC::$server->get(\OC\DB\Connection::class)->getParams();
-			if (\OC::$server->getDatabaseConnection()->getDatabasePlatform() instanceof MySqlPlatform && $params['charset'] !== 'utf8mb4') {
+			if (\OC::$server->getDatabaseConnection()->getDatabaseProvider() === IDBConnection::PLATFORM_MYSQL && $params['charset'] !== 'utf8mb4') {
 				$this->markTestSkipped('MySQL doesn\'t support 4 byte UTF-8');
 			}
 		}
diff --git a/tests/lib/Repair/RepairCollationTest.php b/tests/lib/Repair/RepairCollationTest.php
index 5f5e0737f77..6d3946b2a85 100644
--- a/tests/lib/Repair/RepairCollationTest.php
+++ b/tests/lib/Repair/RepairCollationTest.php
@@ -7,7 +7,6 @@
 
 namespace Test\Repair;
 
-use Doctrine\DBAL\Platforms\MySqlPlatform;
 use OC\Repair\Collation;
 use OCP\IDBConnection;
 use OCP\Migration\IOutput;
@@ -61,7 +60,7 @@ class RepairCollationTest extends TestCase {
 		$this->connection = \OC::$server->get(IDBConnection::class);
 		$this->logger = $this->createMock(LoggerInterface::class);
 		$this->config = \OC::$server->getConfig();
-		if (!$this->connection->getDatabasePlatform() instanceof MySqlPlatform) {
+		if ($this->connection->getDatabaseProvider() !== IDBConnection::PLATFORM_MYSQL) {
 			$this->markTestSkipped("Test only relevant on MySql");
 		}