diff --git a/docs/guide/db-active-record.md b/docs/guide/db-active-record.md
index fafc332bac..d6fd439c1d 100644
--- a/docs/guide/db-active-record.md
+++ b/docs/guide/db-active-record.md
@@ -35,7 +35,8 @@ Below is the list of databases that are currently supported by Yii Active Record
 * SQLite 2 and 3: via [[yii\db\ActiveRecord]]
 * Microsoft SQL Server 2010 or later: via [[yii\db\ActiveRecord]]
 * Oracle: via [[yii\db\ActiveRecord]]
-* CUBRID 9.1 or later: via [[yii\db\ActiveRecord]]
+* CUBRID 9.3 or later: via [[yii\db\ActiveRecord]] (Note that due to a [bug](http://jira.cubrid.org/browse/APIS-658) in
+  the cubrid PDO extension, quoting of values will not work, so you need CUBRID 9.3 as the client as well as the server)
 * Sphnix: via [[yii\sphinx\ActiveRecord]], requires `yii2-sphinx` extension
 * ElasticSearch: via [[yii\elasticsearch\ActiveRecord]], requires `yii2-elasticsearch` extension
 * Redis 2.6.12 or later: via [[yii\redis\ActiveRecord]], requires `yii2-redis` extension
diff --git a/docs/guide/db-dao.md b/docs/guide/db-dao.md
index 05fe922a97..d9ae268040 100644
--- a/docs/guide/db-dao.md
+++ b/docs/guide/db-dao.md
@@ -10,7 +10,8 @@ uniform API and solves some inconsistencies between different DBMS. By default Y
 - [MariaDB](https://mariadb.com/)
 - [SQLite](http://sqlite.org/)
 - [PostgreSQL](http://www.postgresql.org/)
-- [CUBRID](http://www.cubrid.org/): version 9.1.0 or higher.
+- [CUBRID](http://www.cubrid.org/): version 9.3 or higher. (Note that due to a [bug](http://jira.cubrid.org/browse/APIS-658) in
+  the cubrid PDO extension, quoting of values will not work, so you need CUBRID 9.3 as the client as well as the server)
 - [Oracle](http://www.oracle.com/us/products/database/overview/index.html)
 - [MSSQL](https://www.microsoft.com/en-us/sqlserver/default.aspx): version 2005 or higher.
 
diff --git a/framework/db/cubrid/QueryBuilder.php b/framework/db/cubrid/QueryBuilder.php
index 3602ebc7a1..e0c09c3943 100644
--- a/framework/db/cubrid/QueryBuilder.php
+++ b/framework/db/cubrid/QueryBuilder.php
@@ -10,7 +10,7 @@ namespace yii\db\cubrid;
 use yii\base\InvalidParamException;
 
 /**
- * QueryBuilder is the query builder for CUBRID databases (version 9.1.x and higher).
+ * QueryBuilder is the query builder for CUBRID databases (version 9.3.x and higher).
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
diff --git a/framework/db/cubrid/Schema.php b/framework/db/cubrid/Schema.php
index 558d8dfb78..28ea970277 100644
--- a/framework/db/cubrid/Schema.php
+++ b/framework/db/cubrid/Schema.php
@@ -13,7 +13,7 @@ use yii\db\ColumnSchema;
 use yii\db\Transaction;
 
 /**
- * Schema is the class for retrieving metadata from a CUBRID database (version 9.1.x and higher).
+ * Schema is the class for retrieving metadata from a CUBRID database (version 9.3.x and higher).
  *
  * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
@@ -103,30 +103,6 @@ class Schema extends \yii\db\Schema
         return strpos($name, '"') !== false || $name === '*' ? $name : '"' . $name . '"';
     }
 
-    /**
-     * Quotes a string value for use in a query.
-     * Note that if the parameter is not a string, it will be returned without change.
-     * @param string $str string to be quoted
-     * @return string the properly quoted string
-     * @see http://www.php.net/manual/en/function.PDO-quote.php
-     */
-    public function quoteValue($str)
-    {
-        if (!is_string($str)) {
-            return $str;
-        }
-
-        $pdo = $this->db->getSlavePdo();
-
-        // workaround for broken PDO::quote() implementation in CUBRID 9.1.0 http://jira.cubrid.org/browse/APIS-658
-        $version = $pdo->getAttribute(\PDO::ATTR_CLIENT_VERSION);
-        if (version_compare($version, '8.4.4.0002', '<') || $version[0] == '9' && version_compare($version, '9.2.0.0002', '<=')) {
-            return "'" . addcslashes(str_replace("'", "''", $str), "\000\n\r\\\032") . "'";
-        } else {
-            return $pdo->quote($str);
-        }
-    }
-
     /**
      * Creates a query builder for the CUBRID database.
      * @return QueryBuilder query builder instance