diff --git a/lib/Doctrine/DBAL/Driver/Mysqli/MysqliConnection.php b/lib/Doctrine/DBAL/Driver/Mysqli/MysqliConnection.php
index 02697c96013..37b29be6f5b 100644
--- a/lib/Doctrine/DBAL/Driver/Mysqli/MysqliConnection.php
+++ b/lib/Doctrine/DBAL/Driver/Mysqli/MysqliConnection.php
@@ -56,6 +56,11 @@ public function __construct(array $params, $username, $password, array $driverOp
 
         $socket = $params['unix_socket'] ?? ini_get('mysqli.default_socket');
         $dbname = $params['dbname'] ?? '';
+        $host   = $params['host'];
+
+        if (! empty($params['persistent'])) {
+            $host = 'p:' . $host;
+        }
 
         $flags = $driverOptions[static::OPTION_FLAGS] ?? 0;
 
@@ -67,7 +72,7 @@ public function __construct(array $params, $username, $password, array $driverOp
         set_error_handler(static function () {
         });
         try {
-            if (! $this->conn->real_connect($params['host'], $username, $password, $dbname, $port, $socket, $flags)) {
+            if (! $this->conn->real_connect($host, $username, $password, $dbname, $port, $socket, $flags)) {
                 throw MysqliException::fromConnectionError($this->conn);
             }
         } finally {
diff --git a/lib/Doctrine/DBAL/Driver/PDOMySql/Driver.php b/lib/Doctrine/DBAL/Driver/PDOMySql/Driver.php
index 3aa794c4a27..15ff50bdd10 100644
--- a/lib/Doctrine/DBAL/Driver/PDOMySql/Driver.php
+++ b/lib/Doctrine/DBAL/Driver/PDOMySql/Driver.php
@@ -8,6 +8,7 @@
 use Doctrine\DBAL\Driver\AbstractMySQLDriver;
 use Doctrine\DBAL\Driver\PDOConnection;
 use Doctrine\DBAL\Driver\PDOException;
+use PDO;
 
 /**
  * PDO MySql driver.
@@ -19,6 +20,10 @@ class Driver extends AbstractMySQLDriver
      */
     public function connect(array $params, $username = null, $password = null, array $driverOptions = [])
     {
+        if (! empty($params['persistent'])) {
+            $driverOptions[PDO::ATTR_PERSISTENT] = true;
+        }
+
         try {
             $conn = new PDOConnection(
                 $this->constructPdoDsn($params),
diff --git a/lib/Doctrine/DBAL/Driver/PDOOracle/Driver.php b/lib/Doctrine/DBAL/Driver/PDOOracle/Driver.php
index 06e726df84d..5825606fcc0 100644
--- a/lib/Doctrine/DBAL/Driver/PDOOracle/Driver.php
+++ b/lib/Doctrine/DBAL/Driver/PDOOracle/Driver.php
@@ -8,6 +8,7 @@
 use Doctrine\DBAL\Driver\AbstractOracleDriver;
 use Doctrine\DBAL\Driver\PDOConnection;
 use Doctrine\DBAL\Driver\PDOException;
+use PDO;
 
 /**
  * PDO Oracle driver.
@@ -24,6 +25,10 @@ class Driver extends AbstractOracleDriver
      */
     public function connect(array $params, $username = null, $password = null, array $driverOptions = [])
     {
+        if (! empty($params['persistent'])) {
+            $driverOptions[PDO::ATTR_PERSISTENT] = true;
+        }
+
         try {
             return new PDOConnection(
                 $this->constructPdoDsn($params),
diff --git a/lib/Doctrine/DBAL/Driver/PDOPgSql/Driver.php b/lib/Doctrine/DBAL/Driver/PDOPgSql/Driver.php
index f2d8dde4a95..43085c56095 100644
--- a/lib/Doctrine/DBAL/Driver/PDOPgSql/Driver.php
+++ b/lib/Doctrine/DBAL/Driver/PDOPgSql/Driver.php
@@ -21,6 +21,10 @@ class Driver extends AbstractPostgreSQLDriver
      */
     public function connect(array $params, $username = null, $password = null, array $driverOptions = [])
     {
+        if (! empty($params['persistent'])) {
+            $driverOptions[PDO::ATTR_PERSISTENT] = true;
+        }
+
         try {
             $connection = new PDOConnection(
                 $this->_constructPdoDsn($params),
diff --git a/lib/Doctrine/DBAL/Driver/PDOSqlsrv/Driver.php b/lib/Doctrine/DBAL/Driver/PDOSqlsrv/Driver.php
index 2ea7dc2cda7..3b1b90345c4 100644
--- a/lib/Doctrine/DBAL/Driver/PDOSqlsrv/Driver.php
+++ b/lib/Doctrine/DBAL/Driver/PDOSqlsrv/Driver.php
@@ -5,6 +5,7 @@
 namespace Doctrine\DBAL\Driver\PDOSqlsrv;
 
 use Doctrine\DBAL\Driver\AbstractSQLServerDriver;
+use PDO;
 use function is_int;
 use function sprintf;
 
@@ -28,6 +29,10 @@ public function connect(array $params, $username = null, $password = null, array
             }
         }
 
+        if (! empty($params['persistent'])) {
+            $pdoOptions[PDO::ATTR_PERSISTENT] = true;
+        }
+
         return new Connection(
             $this->_constructPdoDsn($params, $dsnOptions),
             $username,
diff --git a/lib/Doctrine/DBAL/Platforms/AbstractPlatform.php b/lib/Doctrine/DBAL/Platforms/AbstractPlatform.php
index e4470b07bb3..ac40617f669 100644
--- a/lib/Doctrine/DBAL/Platforms/AbstractPlatform.php
+++ b/lib/Doctrine/DBAL/Platforms/AbstractPlatform.php
@@ -3398,6 +3398,13 @@ public function getDummySelectSQL(string $expression = '1') : string
         return sprintf('SELECT %s', $expression);
     }
 
+    /**
+     * Returns the SQL to select the current connection identifier.
+     *
+     * @throws DBALException
+     */
+    abstract public function getConnectionIdSQL() : string;
+
     /**
      * Returns the SQL to create a new savepoint.
      *
diff --git a/lib/Doctrine/DBAL/Platforms/DB2Platform.php b/lib/Doctrine/DBAL/Platforms/DB2Platform.php
index b9fc54cf5f4..f95f0d4c1ba 100644
--- a/lib/Doctrine/DBAL/Platforms/DB2Platform.php
+++ b/lib/Doctrine/DBAL/Platforms/DB2Platform.php
@@ -878,6 +878,14 @@ public function getDummySelectSQL(string $expression = '1') : string
         return sprintf('SELECT %s FROM sysibm.sysdummy1', $expression);
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getConnectionIdSQL() : string
+    {
+        throw DBALException::notSupported(__METHOD__);
+    }
+
     /**
      * {@inheritDoc}
      *
diff --git a/lib/Doctrine/DBAL/Platforms/MySqlPlatform.php b/lib/Doctrine/DBAL/Platforms/MySqlPlatform.php
index d8fb568bf1b..85d00d6e1fe 100644
--- a/lib/Doctrine/DBAL/Platforms/MySqlPlatform.php
+++ b/lib/Doctrine/DBAL/Platforms/MySqlPlatform.php
@@ -1144,6 +1144,14 @@ public function getBlobTypeDeclarationSQL(array $field)
         return 'LONGBLOB';
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getConnectionIdSQL() : string
+    {
+        return 'SELECT CONNECTION_ID()';
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/lib/Doctrine/DBAL/Platforms/OraclePlatform.php b/lib/Doctrine/DBAL/Platforms/OraclePlatform.php
index 63f7442786c..e6853b091a6 100644
--- a/lib/Doctrine/DBAL/Platforms/OraclePlatform.php
+++ b/lib/Doctrine/DBAL/Platforms/OraclePlatform.php
@@ -1115,6 +1115,14 @@ public function getDummySelectSQL(string $expression = '1') : string
         return sprintf('SELECT %s FROM DUAL', $expression);
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getConnectionIdSQL() : string
+    {
+        return "SELECT SYS_CONTEXT('USERENV', 'SID') FROM DUAL";
+    }
+
     /**
      * {@inheritDoc}
      */
diff --git a/lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php b/lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php
index 4fa61fbdeca..e0b00c02567 100644
--- a/lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php
+++ b/lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php
@@ -1044,6 +1044,14 @@ public function getClobTypeDeclarationSQL(array $field)
         return 'TEXT';
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getConnectionIdSQL() : string
+    {
+        return 'SELECT pg_backend_pid()';
+    }
+
     /**
      * {@inheritDoc}
      */
diff --git a/lib/Doctrine/DBAL/Platforms/SQLAnywherePlatform.php b/lib/Doctrine/DBAL/Platforms/SQLAnywherePlatform.php
index 691d72ea908..305ebbad4d5 100644
--- a/lib/Doctrine/DBAL/Platforms/SQLAnywherePlatform.php
+++ b/lib/Doctrine/DBAL/Platforms/SQLAnywherePlatform.php
@@ -1510,6 +1510,14 @@ protected function getRenameIndexSQL($oldIndexName, Index $index, $tableName)
         return ['ALTER INDEX ' . $oldIndexName . ' ON ' . $tableName . ' RENAME TO ' . $index->getQuotedName($this)];
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getConnectionIdSQL() : string
+    {
+        throw DBALException::notSupported(__METHOD__);
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/lib/Doctrine/DBAL/Platforms/SQLServerPlatform.php b/lib/Doctrine/DBAL/Platforms/SQLServerPlatform.php
index 1c269628ac0..0f435076345 100644
--- a/lib/Doctrine/DBAL/Platforms/SQLServerPlatform.php
+++ b/lib/Doctrine/DBAL/Platforms/SQLServerPlatform.php
@@ -1654,6 +1654,14 @@ public function getColumnDeclarationSQL($name, array $field)
         return $name . ' ' . $columnDef;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getConnectionIdSQL() : string
+    {
+        return 'SELECT @@SPID';
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/lib/Doctrine/DBAL/Platforms/SqlitePlatform.php b/lib/Doctrine/DBAL/Platforms/SqlitePlatform.php
index a8630569e6d..dac0b68f21e 100644
--- a/lib/Doctrine/DBAL/Platforms/SqlitePlatform.php
+++ b/lib/Doctrine/DBAL/Platforms/SqlitePlatform.php
@@ -1002,6 +1002,14 @@ private function getSimpleAlterTableSQL(TableDiff $diff)
         return array_merge($sql, $tableSql, $columnSql);
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getConnectionIdSQL() : string
+    {
+        throw DBALException::notSupported(__METHOD__);
+    }
+
     /**
      * @return string[]
      */
diff --git a/tests/Doctrine/Tests/DBAL/Functional/ConnectionTest.php b/tests/Doctrine/Tests/DBAL/Functional/ConnectionTest.php
index 4ac0bd1b455..a7363e35a2a 100644
--- a/tests/Doctrine/Tests/DBAL/Functional/ConnectionTest.php
+++ b/tests/Doctrine/Tests/DBAL/Functional/ConnectionTest.php
@@ -6,10 +6,12 @@
 
 use Doctrine\DBAL\Connection;
 use Doctrine\DBAL\ConnectionException;
+use Doctrine\DBAL\DBALException;
 use Doctrine\DBAL\Driver\Connection as DriverConnection;
 use Doctrine\DBAL\DriverManager;
 use Doctrine\DBAL\Platforms\AbstractPlatform;
 use Doctrine\Tests\DbalFunctionalTestCase;
+use Doctrine\Tests\TestUtil;
 use Error;
 use Exception;
 use RuntimeException;
@@ -313,4 +315,38 @@ public function testDeterminesDatabasePlatformWhenConnectingToNonExistentDatabas
 
         $connection->close();
     }
+
+    public function testPersistentConnection() : void
+    {
+        $platform = $this->connection->getDatabasePlatform();
+
+        try {
+            $query = $platform->getConnectionIdSQL();
+        } catch (DBALException $e) {
+            self::markTestSkipped($e->getMessage());
+        }
+
+        $params = TestUtil::getConnectionParams();
+        $params['persistent'] = true;
+
+        self::assertSame(
+            $this->getConnectionId($params, $query),
+            $this->getConnectionId($params, $query)
+        );
+    }
+
+    private function getConnectionId(array $params, $query)
+    {
+        $connection = DriverManager::getConnection($params);
+
+        try {
+            $id = $connection->query($query)->fetchColumn();
+        } finally {
+            $connection->close();
+        }
+
+        self::assertNotFalse($id);
+
+        return $id;
+    }
 }