add automatic platform version detection for PostgreSQL 9.1

lib/Doctrine/DBAL/Driver/AbstractPostgreSQLDriver.php

@@ -22,6 +22,7 @@ namespace Doctrine\DBAL\Driver;
 use Doctrine\DBAL\DBALException;
 use Doctrine\DBAL\Driver;
 use Doctrine\DBAL\Exception;
+use Doctrine\DBAL\Platforms\PostgreSQL91Platform;
 use Doctrine\DBAL\Platforms\PostgreSQL92Platform;
 use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
 use Doctrine\DBAL\Schema\PostgreSqlSchemaManager;
@@ -98,11 +99,14 @@ abstract class AbstractPostgreSQLDriver implements Driver, ExceptionConverterDri
         $patchVersion = isset($versionParts['patch']) ? $versionParts['patch'] : 0;
         $version      = $majorVersion . '.' . $minorVersion . '.' . $patchVersion;
 
-        if (version_compare($version, '9.2', '>=')) {
+        switch(true) {
+            case version_compare($version, '9.2', '>='):
                 return new PostgreSQL92Platform();
+            case version_compare($version, '9.1', '>='):
+                return new PostgreSQL91Platform();
+            default:
+                return new PostgreSqlPlatform();
         }
-
-        return $this->getDatabasePlatform();
     }
 
     /**

tests/Doctrine/Tests/DBAL/Driver/AbstractPostgreSQLDriverTest.php

@@ -55,7 +55,11 @@ class AbstractPostgreSQLDriverTest extends AbstractDriverTest
     protected function getDatabasePlatformsForVersions()
     {
         return array(
-            array('9.1.9', 'Doctrine\DBAL\Platforms\PostgreSqlPlatform'),
+            array('9.0.9', 'Doctrine\DBAL\Platforms\PostgreSqlPlatform'),
+            array('9.1', 'Doctrine\DBAL\Platforms\PostgreSQL91Platform'),
+            array('9.1.0', 'Doctrine\DBAL\Platforms\PostgreSQL91Platform'),
+            array('9.1.1', 'Doctrine\DBAL\Platforms\PostgreSQL91Platform'),
+            array('9.1.9', 'Doctrine\DBAL\Platforms\PostgreSQL91Platform'),
             array('9.2', 'Doctrine\DBAL\Platforms\PostgreSQL92Platform'),
             array('9.2.0', 'Doctrine\DBAL\Platforms\PostgreSQL92Platform'),
             array('9.2.1', 'Doctrine\DBAL\Platforms\PostgreSQL92Platform'),