Revert "Clean up MySQL version detection logic"

src/Driver/AbstractMySQLDriver.php

@@ -17,8 +17,8 @@
 use Doctrine\Deprecations\Deprecation;
 
 use function assert;
+use function preg_match;
 use function stripos;
-use function substr;
 use function version_compare;
 
 /**
@@ -33,17 +33,18 @@ abstract class AbstractMySQLDriver implements VersionAwarePlatformDriver
      */
     public function createDatabasePlatformForVersion($version)
     {
-        $mariadb = stripos($version, 'MariaDB') !== false;
+        $mariadb = stripos($version, 'mariadb') !== false;
         if ($mariadb && version_compare($this->getMariaDbMysqlVersionNumber($version), '10.2.7', '>=')) {
             return new MariaDb1027Platform();
         }
 
         if (! $mariadb) {
-            if (version_compare($version, '8.0.0', '>=')) {
+            $oracleMysqlVersion = $this->getOracleMysqlVersionNumber($version);
+            if (version_compare($oracleMysqlVersion, '8', '>=')) {
                 return new MySQL80Platform();
             }
 
-            if (version_compare($version, '5.7.9', '>=')) {
+            if (version_compare($oracleMysqlVersion, '5.7.9', '>=')) {
                 return new MySQL57Platform();
             }
         }
@@ -58,19 +59,64 @@ public function createDatabasePlatformForVersion($version)
         return $this->getDatabasePlatform();
     }
 
+    /**
+     * Get a normalized 'version number' from the server string
+     * returned by Oracle MySQL servers.
+     *
+     * @param string $versionString Version string returned by the driver, i.e. '5.7.10'
+     *
+     * @throws Exception
+     */
+    private function getOracleMysqlVersionNumber(string $versionString): string
+    {
+        if (
+            preg_match(
+                '/^(?P<major>\d+)(?:\.(?P<minor>\d+)(?:\.(?P<patch>\d+))?)?/',
+                $versionString,
+                $versionParts,
+            ) === 0
+        ) {
+            throw Exception::invalidPlatformVersionSpecified(
+                $versionString,
+                '<major_version>.<minor_version>.<patch_version>',
+            );
+        }
+
+        $majorVersion = $versionParts['major'];
+        $minorVersion = $versionParts['minor'] ?? 0;
+        $patchVersion = $versionParts['patch'] ?? null;
+
+        if ($majorVersion === '5' && $minorVersion === '7') {
+            $patchVersion ??= '9';
+        }
+
+        return $majorVersion . '.' . $minorVersion . '.' . $patchVersion;
+    }
+
     /**
      * Detect MariaDB server version, including hack for some mariadb distributions
      * that starts with the prefix '5.5.5-'
      *
      * @param string $versionString Version string as returned by mariadb server, i.e. '5.5.5-Mariadb-10.0.8-xenial'
+     *
+     * @throws Exception
      */
     private function getMariaDbMysqlVersionNumber(string $versionString): string
     {
-        if (substr($versionString, 0, 6) === '5.5.5-') {
-            return substr($versionString, 6);
+        if (
+            preg_match(
+                '/^(?:5\.5\.5-)?(mariadb-)?(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)/i',
+                $versionString,
+                $versionParts,
+            ) === 0
+        ) {
+            throw Exception::invalidPlatformVersionSpecified(
+                $versionString,
+                '^(?:5\.5\.5-)?(mariadb-)?<major_version>.<minor_version>.<patch_version>',
+            );
         }
 
-        return $versionString;
+        return $versionParts['major'] . '.' . $versionParts['minor'] . '.' . $versionParts['patch'];
     }
 
     /**

tests/Driver/AbstractDriverTest.php

@@ -5,6 +5,7 @@
 use Doctrine\DBAL\Connection;
 use Doctrine\DBAL\Driver;
 use Doctrine\DBAL\Driver\API\ExceptionConverter;
+use Doctrine\DBAL\Exception;
 use Doctrine\DBAL\Platforms\AbstractPlatform;
 use Doctrine\DBAL\Schema\AbstractSchemaManager;
 use Doctrine\DBAL\VersionAwarePlatformDriver;
@@ -61,6 +62,16 @@ public function testCreatesDatabasePlatformForVersion(): void
         }
     }
 
+    public function testThrowsExceptionOnCreatingDatabasePlatformsForInvalidVersion(): void
+    {
+        if (! $this->driver instanceof VersionAwarePlatformDriver) {
+            self::markTestSkipped('This test is only intended for version aware platform drivers.');
+        }
+
+        $this->expectException(Exception::class);
+        $this->driver->createDatabasePlatformForVersion('foo');
+    }
+
     public function testReturnsDatabasePlatform(): void
     {
         self::assertEquals($this->createPlatform(), $this->driver->getDatabasePlatform());

tests/Driver/AbstractMySQLDriverTest.php

@@ -48,17 +48,21 @@ protected function getDatabasePlatformsForVersions(): array
     {
         return [
             ['5.6.9', MySQLPlatform::class],
+            ['5.7', MySQL57Platform::class],
             ['5.7.0', MySQLPlatform::class],
             ['5.7.8', MySQLPlatform::class],
             ['5.7.9', MySQL57Platform::class],
             ['5.7.10', MySQL57Platform::class],
+            ['8', MySQL80Platform::class],
+            ['8.0', MySQL80Platform::class],
             ['8.0.11', MySQL80Platform::class],
+            ['6', MySQL57Platform::class],
             ['10.0.15-MariaDB-1~wheezy', MySQLPlatform::class],
             ['5.5.5-10.1.25-MariaDB', MySQLPlatform::class],
             ['10.1.2a-MariaDB-a1~lenny-log', MySQLPlatform::class],
             ['5.5.40-MariaDB-1~wheezy', MySQLPlatform::class],
-            ['5.5.5-10.2.8-MariaDB-1~xenial', MariaDb1027Platform::class],
-            ['5.5.5-10.2.8-MariaDB-10.2.8+maria~xenial-log', MariaDb1027Platform::class],
+            ['5.5.5-MariaDB-10.2.8+maria~xenial-log', MariaDb1027Platform::class],
+            ['10.2.8-MariaDB-10.2.8+maria~xenial-log', MariaDb1027Platform::class],
             ['10.2.8-MariaDB-1~lenny-log', MariaDb1027Platform::class],
         ];
     }