diff --git a/docs/guide-es/db-dao.md b/docs/guide-es/db-dao.md
index 5d34a1d484..309a796cf9 100644
--- a/docs/guide-es/db-dao.md
+++ b/docs/guide-es/db-dao.md
@@ -14,7 +14,7 @@ Yii DAO soporta las siguientes bases de datos:
 - [MySQL](http://www.mysql.com/)
 - [MariaDB](https://mariadb.com/)
 - [SQLite](http://sqlite.org/)
-- [PostgreSQL](http://www.postgresql.org/)
+- [PostgreSQL](http://www.postgresql.org/): versión 8.4 o superior.
 - [CUBRID](http://www.cubrid.org/): versión 9.3 o superior.
 - [Oracle](http://www.oracle.com/us/products/database/overview/index.html)
 - [MSSQL](https://www.microsoft.com/en-us/sqlserver/default.aspx): versión 2008 o superior.
diff --git a/docs/guide-fr/db-dao.md b/docs/guide-fr/db-dao.md
index 1e162b583f..af899f1cd3 100644
--- a/docs/guide-fr/db-dao.md
+++ b/docs/guide-fr/db-dao.md
@@ -10,7 +10,7 @@ Les objets d'accès aux bases de données de Yii prennent en charge les bases de
 - [MySQL](http://www.mysql.com/)
 - [MariaDB](https://mariadb.com/)
 - [SQLite](http://sqlite.org/)
-- [PostgreSQL](http://www.postgresql.org/)
+- [PostgreSQL](http://www.postgresql.org/): version 8.4 or higher.
 - [CUBRID](http://www.cubrid.org/): version 9.3 or higher.
 - [Oracle](http://www.oracle.com/us/products/database/overview/index.html)
 - [MSSQL](https://www.microsoft.com/en-us/sqlserver/default.aspx): version 2008 or higher.
diff --git a/docs/guide-ja/db-dao.md b/docs/guide-ja/db-dao.md
index 4794538e69..64c0dd9483 100644
--- a/docs/guide-ja/db-dao.md
+++ b/docs/guide-ja/db-dao.md
@@ -13,7 +13,7 @@ Yii は下記の DBMS のサポートを内蔵しています。
 - [MySQL](http://www.mysql.com/)
 - [MariaDB](https://mariadb.com/)
 - [SQLite](http://sqlite.org/)
-- [PostgreSQL](http://www.postgresql.org/)
+- [PostgreSQL](http://www.postgresql.org/): バージョン 8.4 以上。
 - [CUBRID](http://www.cubrid.org/): バージョン 9.3 以上。
 - [Oracle](http://www.oracle.com/us/products/database/overview/index.html)
 - [MSSQL](https://www.microsoft.com/en-us/sqlserver/default.aspx): バージョン 2008 以上。
diff --git a/docs/guide-pl/db-active-record.md b/docs/guide-pl/db-active-record.md
index 9af6693ff8..72866623cf 100644
--- a/docs/guide-pl/db-active-record.md
+++ b/docs/guide-pl/db-active-record.md
@@ -27,7 +27,7 @@ $db->createCommand('INSERT INTO `customer` (`name`) VALUES (:name)', [
 Yii zapewnia wsparcie Active Record dla następujących typów relacyjnych baz danych:
 
 * MySQL 4.1 lub nowszy: poprzez [[yii\db\ActiveRecord]]
-* PostgreSQL 7.3 lub nowszy: poprzez [[yii\db\ActiveRecord]]
+* PostgreSQL 8.4 lub nowszy: poprzez [[yii\db\ActiveRecord]]
 * SQLite 2 i 3: poprzez [[yii\db\ActiveRecord]]
 * Microsoft SQL Server 2008 lub nowszy: poprzez [[yii\db\ActiveRecord]]
 * Oracle: poprzez [[yii\db\ActiveRecord]]
diff --git a/docs/guide-pt-BR/db-active-record.md b/docs/guide-pt-BR/db-active-record.md
index 69595217e6..5139cc6864 100644
--- a/docs/guide-pt-BR/db-active-record.md
+++ b/docs/guide-pt-BR/db-active-record.md
@@ -22,7 +22,7 @@ $db->createCommand('INSERT INTO `customer` (`name`) VALUES (:name)', [
 O Yii fornece suporte Active Record para os seguintes bancos de dados relacionais:
 
 * MySQL 4.1 ou superior: via [[yii\db\ActiveRecord]]
-* PostgreSQL 7.3 ou superior: via [[yii\db\ActiveRecord]]
+* PostgreSQL 8.4 ou superior: via [[yii\db\ActiveRecord]]
 * SQLite 2 e 3: via [[yii\db\ActiveRecord]]
 * Microsoft SQL Server 2008 ou superior: via [[yii\db\ActiveRecord]]
 * Oracle: via [[yii\db\ActiveRecord]]
diff --git a/docs/guide-ru/db-dao.md b/docs/guide-ru/db-dao.md
index 0c710f9d04..15f4b95e26 100644
--- a/docs/guide-ru/db-dao.md
+++ b/docs/guide-ru/db-dao.md
@@ -15,7 +15,7 @@ Yii DAO из коробки поддерживает следующие базы
 - [MySQL](http://www.mysql.com/)
 - [MariaDB](https://mariadb.com/)
 - [SQLite](http://sqlite.org/)
-- [PostgreSQL](http://www.postgresql.org/)
+- [PostgreSQL](http://www.postgresql.org/): версии 8.4 или выше.
 - [CUBRID](http://www.cubrid.org/): версии 9.3 или выше.
 - [Oracle](http://www.oracle.com/us/products/database/overview/index.html)
 - [MSSQL](https://www.microsoft.com/en-us/sqlserver/default.aspx): версии 2008 или выше.
diff --git a/docs/guide-zh-CN/db-dao.md b/docs/guide-zh-CN/db-dao.md
index a813e8a4ae..0aa6036639 100644
--- a/docs/guide-zh-CN/db-dao.md
+++ b/docs/guide-zh-CN/db-dao.md
@@ -7,7 +7,7 @@ Yii 默认支持以下数据库 (DBMS):
 - [MySQL](http://www.mysql.com/)
 - [MariaDB](https://mariadb.com/)
 - [SQLite](http://sqlite.org/)
-- [PostgreSQL](http://www.postgresql.org/)
+- [PostgreSQL](http://www.postgresql.org/): 版本 >= 8.4
 - [CUBRID](http://www.cubrid.org/): 版本 >= 9.3 . (由于PHP PDO 扩展的一个[bug](http://jira.cubrid.org/browse/APIS-658)  引用值会无效,所以你需要在 CUBRID的客户端和服务端都使用 9.3 )
 - [Oracle](http://www.oracle.com/us/products/database/overview/index.html)
 - [MSSQL](https://www.microsoft.com/en-us/sqlserver/default.aspx): 版本>=2005.
diff --git a/docs/guide/db-dao.md b/docs/guide/db-dao.md
index 0464d365f5..931fc8566c 100644
--- a/docs/guide/db-dao.md
+++ b/docs/guide/db-dao.md
@@ -14,7 +14,7 @@ Yii DAO supports the following databases out of box:
 - [MySQL](http://www.mysql.com/)
 - [MariaDB](https://mariadb.com/)
 - [SQLite](http://sqlite.org/)
-- [PostgreSQL](http://www.postgresql.org/)
+- [PostgreSQL](http://www.postgresql.org/): version 8.4 or higher
 - [CUBRID](http://www.cubrid.org/): version 9.3 or higher.
 - [Oracle](http://www.oracle.com/us/products/database/overview/index.html)
 - [MSSQL](https://www.microsoft.com/en-us/sqlserver/default.aspx): version 2008 or higher.
diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index 4d99483857..b26f1cac0a 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -12,6 +12,7 @@ Yii Framework 2 Change Log
 - Bug #11230: Include `defaultRoles` in `yii\rbac\DbManager->getRolesByUser()` results (developeruz)
 - Bug #13343: Fixed `yii\i18n\Formatter::asTime()` to process time-only values without time zone conversion (bizley)
 - Bug #11404: `yii\base\Model::loadMultiple()` returns true even if `yii\base\Model::load()` returns false (zvook)
+- Bug #13577: `yii\db\QueryBuilder::truncateTable` should work consistent over all databases (boboldehampsink)
 - Enh #13577: Implemented `yii\db\mssql\QueryBuilder::resetSequence()` (boboldehampsink)
 - Bug #13513: Fixed RBAC migration to work correctly on Oracle DBMS (silverfire)
 - Enh #13550: Refactored unset call order in `yii\di\ServiceLocator::set()` (Lanrik)
diff --git a/framework/db/pgsql/QueryBuilder.php b/framework/db/pgsql/QueryBuilder.php
index 46e98f11db..2f6127f894 100644
--- a/framework/db/pgsql/QueryBuilder.php
+++ b/framework/db/pgsql/QueryBuilder.php
@@ -205,6 +205,17 @@ class QueryBuilder extends \yii\db\QueryBuilder
         return $command;
     }
 
+    /**
+     * Builds a SQL statement for truncating a DB table.
+     * Explicitly restarts identity for PGSQL to be consistent with other databases which all do this by default.
+     * @param string $table the table to be truncated. The name will be properly quoted by the method.
+     * @return string the SQL statement for truncating a DB table.
+     */
+    public function truncateTable($table)
+    {
+        return 'TRUNCATE TABLE ' . $this->db->quoteTableName($table) . ' RESTART IDENTITY';
+    }
+
     /**
      * Builds a SQL statement for changing the definition of a column.
      * @param string $table the table whose column is to be changed. The table name will be properly quoted by the method.