diff --git a/framework/db/dao/ColumnSchema.php b/framework/db/dao/ColumnSchema.php
index f7566b9..2c4d8ff 100644
--- a/framework/db/dao/ColumnSchema.php
+++ b/framework/db/dao/ColumnSchema.php
@@ -32,7 +32,7 @@ class ColumnSchema extends \yii\base\Component
 	public $allowNull;
 	/**
 	 * @var string logical type of this column. Possible logic types include:
-	 * string, text, boolean, smallint, integer, bigint, float, decimal, datetime, timestamp, time, date, binary
+	 * string, text, boolean, smallint, integer, bigint, float, decimal, datetime, timestamp, time, date, binary, money
 	 */
 	public $type;
 	/**
diff --git a/framework/db/dao/Command.php b/framework/db/dao/Command.php
index 3715390..0159a78 100644
--- a/framework/db/dao/Command.php
+++ b/framework/db/dao/Command.php
@@ -163,8 +163,7 @@ class Command extends \yii\base\Component
 			$sql = $this->getSql();
 			try {
 				$this->pdoStatement = $this->connection->pdo->prepare($sql);
-			}
-			catch (\Exception $e) {
+			} catch (\Exception $e) {
 				\Yii::error($e->getMessage() . "\nFailed to prepare SQL: $sql", __CLASS__);
 				$errorInfo = $e instanceof \PDOException ? $e->errorInfo : null;
 				throw new Exception($e->getMessage(), (int)$e->getCode(), $errorInfo);
@@ -289,8 +288,7 @@ class Command extends \yii\base\Component
 				\Yii::endProfile(__METHOD__ . "($sql)", __CLASS__);
 			}
 			return $n;
-		}
-		catch (Exception $e) {
+		} catch (\Exception $e) {
 			if ($this->connection->enableProfiling) {
 				\Yii::endProfile(__METHOD__ . "($sql)", __CLASS__);
 			}
@@ -360,7 +358,7 @@ class Command extends \yii\base\Component
 	 */
 	public function queryScalar($params = array())
 	{
-		$result = $this->queryInternal('fetchColumn', $params);
+		$result = $this->queryInternal('fetchColumn', $params, 0);
 		if (is_resource($result) && get_resource_type($result) === 'stream') {
 			return stream_get_contents($result);
 		} else {
@@ -452,8 +450,7 @@ class Command extends \yii\base\Component
 			}
 
 			return $result;
-		}
-		catch (Exception $e) {
+		} catch (\Exception $e) {
 			if ($db->enableProfiling) {
 				\Yii::endProfile(__METHOD__ . "($sql)", __CLASS__);
 			}
diff --git a/framework/db/dao/Connection.php b/framework/db/dao/Connection.php
index efdf53a..a9855bc 100644
--- a/framework/db/dao/Connection.php
+++ b/framework/db/dao/Connection.php
@@ -61,8 +61,7 @@ use yii\db\Exception;
  *	 $connection->createCommand($sql2)->execute();
  *	 // ... executing other SQL statements ...
  *	 $transaction->commit();
- * }
- * catch(Exception $e) {
+ * } catch(Exception $e) {
  *	 $transaction->rollBack();
  * }
  * ~~~
diff --git a/framework/db/dao/Query.php b/framework/db/dao/Query.php
index 6c30acb..fec9672 100644
--- a/framework/db/dao/Query.php
+++ b/framework/db/dao/Query.php
@@ -77,6 +77,10 @@ class Query extends \yii\base\Object
 	public $union;
 
 
+	/**
+	 * @param Connection $connection
+	 * @return string
+	 */
 	public function getSql($connection)
 	{
 		return $connection->getQueryBuilder()->build($this);
diff --git a/framework/db/dao/QueryBuilder.php b/framework/db/dao/QueryBuilder.php
index 8aad9cc..ad1c3cb 100644
--- a/framework/db/dao/QueryBuilder.php
+++ b/framework/db/dao/QueryBuilder.php
@@ -22,22 +22,9 @@ class QueryBuilder extends \yii\base\Object
 {
 	/**
 	 * @var array the abstract column types mapped to physical column types.
+	 * Child classes should override this property to declare possible type mappings.
 	 */
-	public $typeMap = array(
-		'pk' => 'int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY',
-		'string' => 'varchar(255)',
-		'text' => 'text',
-		'integer' => 'int(11)',
-		'float' => 'float',
-		'decimal' => 'decimal',
-		'datetime' => 'datetime',
-		'timestamp' => 'timestamp',
-		'time' => 'time',
-		'date' => 'date',
-		'binary' => 'blob',
-		'boolean' => 'tinyint(1)',
-		'money' => 'decimal(19,4)',
-	);
+	public $typeMap = array();
 	/**
 	 * @var Connection the database connection.
 	 */
diff --git a/framework/db/dao/Schema.php b/framework/db/dao/Schema.php
index 6f45a5c..dbd76fc 100644
--- a/framework/db/dao/Schema.php
+++ b/framework/db/dao/Schema.php
@@ -4,7 +4,7 @@
  *
  * @author Qiang Xue <qiang.xue@gmail.com>
  * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2011 Yii Software LLC
+ * @copyright Copyright &copy; 2008-2012 Yii Software LLC
  * @license http://www.yiiframework.com/license/
  */
 
@@ -20,6 +20,22 @@ use yii\db\Exception;
  */
 abstract class Schema extends \yii\base\Object
 {
+	const TYPE_PK = 'pk';
+	const TYPE_STRING = 'string';
+	const TYPE_TEXT = 'text';
+	const TYPE_SMALLINT = 'smallint';
+	const TYPE_INTEGER = 'integer';
+	const TYPE_BIGINT = 'bigint';
+	const TYPE_FLOAT = 'float';
+	const TYPE_DECIMAL = 'decimal';
+	const TYPE_DATETIME = 'datetime';
+	const TYPE_TIMESTAMP = 'timestamp';
+	const TYPE_TIME = 'time';
+	const TYPE_DATE = 'date';
+	const TYPE_BINARY = 'binary';
+	const TYPE_BOOLEAN = 'boolean';
+	const TYPE_MONEY = 'money';
+
 	/**
 	 * @var \yii\db\dao\Connection the database connection
 	 */
@@ -38,7 +54,7 @@ abstract class Schema extends \yii\base\Object
 
 	/**
 	 * Constructor.
-	 * @param CDbConnection $connection database connection.
+	 * @param Connection $connection database connection.
 	 */
 	public function __construct($connection)
 	{
@@ -48,7 +64,7 @@ abstract class Schema extends \yii\base\Object
 	/**
 	 * Obtains the metadata for the named table.
 	 * @param string $name table name. The table name may contain schema name if any. Do not quote the table name.
-	 * @return CDbTableSchema table metadata. Null if the named table does not exist.
+	 * @return TableSchema table metadata. Null if the named table does not exist.
 	 */
 	public function getTableSchema($name)
 	{
diff --git a/framework/db/dao/TableSchema.php b/framework/db/dao/TableSchema.php
index 6ad64db..cfd475a 100644
--- a/framework/db/dao/TableSchema.php
+++ b/framework/db/dao/TableSchema.php
@@ -15,16 +15,6 @@ namespace yii\db\dao;
  *
  * It may be extended by different DBMS driver to provide DBMS-specific table metadata.
  *
- * TableSchema provides the following information about a table:
- * <ul>
- * <li>{@link name}</li>
- * <li>{@link rawName}</li>
- * <li>{@link columns}</li>
- * <li>{@link primaryKey}</li>
- * <li>{@link foreignKeys}</li>
- * <li>{@link sequenceName}</li>
- * </ul>
- *
  * @author Qiang Xue <qiang.xue@gmail.com>
  * @since 2.0
  */
diff --git a/framework/db/dao/Transaction.php b/framework/db/dao/Transaction.php
index 0e815f0..fc261b1 100644
--- a/framework/db/dao/Transaction.php
+++ b/framework/db/dao/Transaction.php
@@ -27,8 +27,7 @@ use yii\db\Exception;
  *	 $connection->createCommand($sql2)->execute();
  *	 //.... other SQL executions
  *	 $transaction->commit();
- * }
- * catch(Exception $e) {
+ * } catch(Exception $e) {
  *	 $transaction->rollBack();
  * }
  * ~~~
diff --git a/framework/db/dao/mysql/QueryBuilder.php b/framework/db/dao/mysql/QueryBuilder.php
index 0c4791c..e5b241b 100644
--- a/framework/db/dao/mysql/QueryBuilder.php
+++ b/framework/db/dao/mysql/QueryBuilder.php
@@ -21,22 +21,22 @@ class QueryBuilder extends \yii\db\dao\QueryBuilder
 	/**
 	 * @var array the abstract column types mapped to physical column types.
 	 */
-    public $columnTypes = array(
-        'pk' => 'int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY',
-        'string' => 'varchar(255)',
-        'text' => 'text',
-		'smallint' => 'smallint',
-        'integer' => 'int(11)',
-		'bigint'=> 'bigint',
-        'boolean' => 'tinyint(1)',
-        'float' => 'float',
-        'decimal' => 'decimal',
-		'money' => 'decimal(19,4)',
-        'datetime' => 'datetime',
-        'timestamp' => 'timestamp',
-        'time' => 'time',
-        'date' => 'date',
-        'binary' => 'blob',
+    public $typeMap = array(
+		Schema::TYPE_PK => 'int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY',
+		Schema::TYPE_STRING => 'varchar(255)',
+		Schema::TYPE_TEXT => 'text',
+		Schema::TYPE_SMALLINT => 'smallint(6)',
+		Schema::TYPE_INTEGER => 'int(11)',
+		Schema::TYPE_BIGINT => 'bigint(20)',
+		Schema::TYPE_FLOAT => 'float',
+		Schema::TYPE_DECIMAL => 'decimal',
+		Schema::TYPE_DATETIME => 'datetime',
+		Schema::TYPE_TIMESTAMP => 'timestamp',
+		Schema::TYPE_TIME => 'time',
+		Schema::TYPE_DATE => 'date',
+		Schema::TYPE_BINARY => 'blob',
+		Schema::TYPE_BOOLEAN => 'tinyint(1)',
+		Schema::TYPE_MONEY => 'decimal(19,4)',
     );
 
 	/**
diff --git a/framework/db/dao/mysql/Schema.php b/framework/db/dao/mysql/Schema.php
index a98510b..0f28e98 100644
--- a/framework/db/dao/mysql/Schema.php
+++ b/framework/db/dao/mysql/Schema.php
@@ -10,6 +10,8 @@
 
 namespace yii\db\dao\mysql;
 
+use yii\db\dao\TableSchema;
+
 /**
  * Schema is the class for retrieving metadata information from a MySQL database (version 4.1.x and 5.x).
  *
@@ -43,7 +45,7 @@ class Schema extends \yii\db\dao\Schema
 	/**
 	 * Loads the metadata for the specified table.
 	 * @param string $name table name
-	 * @return TableSchema driver dependent table metadata. Null if the table does not exist.
+	 * @return \yii\db\dao\TableSchema driver dependent table metadata. Null if the table does not exist.
 	 */
 	protected function loadTableSchema($name)
 	{
@@ -58,7 +60,7 @@ class Schema extends \yii\db\dao\Schema
 
 	/**
 	 * Generates various kinds of table names.
-	 * @param CMysqlTableSchema $table the table instance
+	 * @param \yii\db\dao\TableSchema $table the table instance
 	 * @param string $name the unquoted table name
 	 */
 	protected function resolveTableNames($table, $name)
@@ -96,7 +98,7 @@ class Schema extends \yii\db\dao\Schema
 
 	/**
 	 * Collects the table column metadata.
-	 * @param CMysqlTableSchema $table the table metadata
+	 * @param \yii\db\dao\TableSchema $table the table metadata
 	 * @return boolean whether the table exists in the database
 	 */
 	protected function findColumns($table)
@@ -128,7 +130,7 @@ class Schema extends \yii\db\dao\Schema
 
 	/**
 	 * Collects the foreign key column details for the given table.
-	 * @param CMysqlTableSchema $table the table metadata
+	 * @param \yii\db\dao\TableSchema $table the table metadata
 	 */
 	protected function findConstraints($table)
 	{
diff --git a/tests/unit/data/mysql.sql b/tests/unit/data/mysql.sql
index 7b77af2..ae5ac94 100644
--- a/tests/unit/data/mysql.sql
+++ b/tests/unit/data/mysql.sql
@@ -43,18 +43,18 @@ CREATE TABLE yii_post
 (
 	id INTEGER NOT NULL PRIMARY KEY AUTO_INCREMENT,
 	title VARCHAR(128) NOT NULL,
-	create_time TIMESTAMP NOT NULL,
+	create_time INTEGER NOT NULL,
 	author_id INTEGER NOT NULL,
 	content TEXT,
 	CONSTRAINT FK_post_author FOREIGN KEY (author_id)
 		REFERENCES yii_user (id) ON DELETE CASCADE ON UPDATE RESTRICT
 ) TYPE=INNODB;
 
-INSERT INTO yii_post (title, create_time, author_id, content) VALUES ('post 1','2000-01-01',1,'content 1');
-INSERT INTO yii_post (title, create_time, author_id, content) VALUES ('post 2','2000-01-02',2,'content 2');
-INSERT INTO yii_post (title, create_time, author_id, content) VALUES ('post 3','2000-01-03',2,'content 3');
-INSERT INTO yii_post (title, create_time, author_id, content) VALUES ('post 4','2000-01-04',2,'content 4');
-INSERT INTO yii_post (title, create_time, author_id, content) VALUES ('post 5','2000-01-05',3,'content 5');
+INSERT INTO yii_post (title, create_time, author_id, content) VALUES ('post 1','1324854194',1,'content 1');
+INSERT INTO yii_post (title, create_time, author_id, content) VALUES ('post 2','1324855194',2,'content 2');
+INSERT INTO yii_post (title, create_time, author_id, content) VALUES ('post 3','1324856194',2,'content 3');
+INSERT INTO yii_post (title, create_time, author_id, content) VALUES ('post 4','1324857194',2,'content 4');
+INSERT INTO yii_post (title, create_time, author_id, content) VALUES ('post 5','1324858194',3,'content 5');
 
 CREATE TABLE yii_comment
 (
diff --git a/tests/unit/framework/db/dao/CommandTest.php b/tests/unit/framework/db/dao/CommandTest.php
index fb2b561..2641e83 100644
--- a/tests/unit/framework/db/dao/CommandTest.php
+++ b/tests/unit/framework/db/dao/CommandTest.php
@@ -5,6 +5,7 @@ namespace yiiunit\framework\db\dao;
 use yii\db\dao\Connection;
 use yii\db\dao\Command;
 use yii\db\dao\Query;
+use yii\db\dao\DataReader;
 
 class CommandTest extends \yiiunit\MysqlTestCase
 {
@@ -15,7 +16,7 @@ class CommandTest extends \yiiunit\MysqlTestCase
 		$command = $db->createCommand();
 		$this->assertEquals("SELECT *\nFROM ", $command->sql);
 
-		$sql='SELECT * FROM posts';
+		$sql = 'SELECT * FROM yii_post';
 		$command = $db->createCommand($sql);
 		$this->assertEquals($sql, $command->sql);
 
@@ -23,7 +24,7 @@ class CommandTest extends \yiiunit\MysqlTestCase
 		$command = $db->createCommand($query);
 		$this->assertEquals($query, $command->query);
 
-		$query = array('select'=>'id', 'from'=>'posts');
+		$query = array('select' => 'id', 'from' => 'yii_post');
 		$command = $db->createCommand($query);
 		$this->assertEquals($query, $command->query->toArray());
 	}
@@ -44,248 +45,190 @@ class CommandTest extends \yiiunit\MysqlTestCase
 
 	function testGetSetSql()
 	{
+		$db = $this->getConnection(false);
 
-	}
-
-	function testPrepare()
-	{
-
-	}
-
-	function testBindParam()
-	{
+		$sql = 'SELECT * FROM yii_user';
+		$command = $db->createCommand($sql);
+		$this->assertEquals($sql, $command->sql);
 
+		$sql2 = 'SELECT * FROM yii_yii_post';
+		$command->sql = $sql2;
+		$this->assertEquals($sql2, $command->sql);
 	}
 
-	function testBindValue()
+	function testPrepareCancel()
 	{
+		$db = $this->getConnection(false);
 
+		$command = $db->createCommand('SELECT * FROM yii_user');
+		$this->assertEquals(null, $command->pdoStatement);
+		$command->prepare();
+		$this->assertNotEquals(null, $command->pdoStatement);
+		$command->cancel();
+		$this->assertEquals(null, $command->pdoStatement);
 	}
 
 	function testExecute()
 	{
+		$db = $this->getConnection();
 
-	}
-
-	function testQuery()
-	{
-
-	}
-
-	function testQueryRow()
-	{
-
-	}
+		$sql = 'INSERT INTO yii_comment(content,post_id,author_id) VALUES (\'test comment\', 1, 1)';
+		$command = $db->createCommand($sql);
+		$this->assertEquals(1, $command->execute());
 
-	function testQueryAll()
-	{
+		$sql = 'SELECT COUNT(*) FROM yii_comment WHERE content=\'test comment\'';
+		$command = $db->createCommand($sql);
+		$this->assertEquals(1, $command->queryScalar());
 
+		$command = $db->createCommand('bad SQL');
+		$this->setExpectedException('\yii\db\Exception');
+		$command->execute();
 	}
 
-	function testQueryColumn()
+	function testQuery()
 	{
+		$db = $this->getConnection();
 
-	}
+		// query
+		$sql = 'SELECT * FROM yii_post';
+		$reader = $db->createCommand($sql)->query();
+		$this->assertTrue($reader instanceof DataReader);
 
-	function testQueryScalar()
-	{
+		// queryAll
+		$rows = $db->createCommand('SELECT * FROM yii_post')->queryAll();
+		$this->assertEquals(5, count($rows));
+		$row = $rows[2];
+		$this->assertEquals(3, $row['id']);
+		$this->assertEquals($row['title'], 'post 3');
 
-	}
+		$rows = $db->createCommand('SELECT * FROM yii_post WHERE id=10')->queryAll();
+		$this->assertEquals(array(), $rows);
 
-	function testFetchMode()
-	{
-
-	}
+		// queryRow
+		$sql = 'SELECT * FROM yii_post';
+		$row = $db->createCommand($sql)->queryRow();
+		$this->assertEquals(1, $row['id']);
+		$this->assertEquals('post 1', $row['title'], 'post 1');
 
-	/*
-	function testPrepare()
-	{
-		$sql='SELECT title FROM posts';
-		$command=$db->createCommand($sql);
-		$this->assertEquals($command->pdoStatement,null);
+		$sql = 'SELECT * FROM yii_post';
+		$command = $db->createCommand($sql);
 		$command->prepare();
-		$this->assertTrue($command->pdoStatement instanceof PDOStatement);
-		$this->assertEquals($command->queryScalar(),'post 1');
+		$row = $command->queryRow();
+		$this->assertEquals(1, $row['id']);
+		$this->assertEquals('post 1', $row['title']);
 
-		$command->text='Bad SQL';
-		$this->setExpectedException('CException');
-		$command->prepare();
-	}
+		$sql = 'SELECT * FROM yii_post WHERE id=10';
+		$command = $db->createCommand($sql);
+		$this->assertFalse($command->queryRow());
 
-	function testCancel()
-	{
-		$sql='SELECT title FROM posts';
-		$command=$db->createCommand($sql);
-		$command->prepare();
-		$this->assertTrue($command->pdoStatement instanceof PDOStatement);
-		$command->cancel();
-		$this->assertEquals($command->pdoStatement,null);
-	}
+		// queryColumn
+		$sql = 'SELECT * FROM yii_post';
+		$column = $db->createCommand($sql)->queryColumn();
+		$this->assertEquals(range(1, 5), $column);
 
-	function testExecute()
-	{
-		$sql='INSERT INTO comments(content,post_id,author_id) VALUES (\'test comment\', 1, 1)';
-		$command=$db->createCommand($sql);
-		$this->assertEquals($command->execute(),1);
-		$this->assertEquals($command->execute(),1);
-		$command=$db->createCommand('SELECT * FROM comments WHERE content=\'test comment\'');
-		$this->assertEquals($command->execute(),0);
-		$command=$db->createCommand('SELECT COUNT(*) FROM comments WHERE content=\'test comment\'');
-		$this->assertEquals($command->queryScalar(),2);
-
-		$command=$db->createCommand('bad SQL');
-		$this->setExpectedException('CException');
-		$command->execute();
-	}
+		$command = $db->createCommand('SELECT id FROM yii_post WHERE id=10');
+		$this->assertEquals(array(), $command->queryColumn());
 
-	function testQuery()
-	{
-		$sql='SELECT * FROM posts';
-		$reader=$db->createCommand($sql)->query();
-		$this->assertTrue($reader instanceof CDbDataReader);
+		// queryScalar
+		$sql = 'SELECT * FROM yii_post';
+		$this->assertEquals($db->createCommand($sql)->queryScalar(), 1);
 
-		$sql='SELECT * FROM posts';
-		$command=$db->createCommand($sql);
+		$sql = 'SELECT id FROM yii_post';
+		$command = $db->createCommand($sql);
 		$command->prepare();
-		$reader=$command->query();
-		$this->assertTrue($reader instanceof CDbDataReader);
+		$this->assertEquals(1, $command->queryScalar());
+
+		$command = $db->createCommand('SELECT id FROM yii_post WHERE id=10');
+		$this->assertFalse($command->queryScalar());
 
-		$command=$db->createCommand('bad SQL');
-		$this->setExpectedException('CException');
+		$command = $db->createCommand('bad SQL');
+		$this->setExpectedException('\yii\db\Exception');
 		$command->query();
 	}
 
-	function testBindParam()
+	function testBindParamValue()
 	{
-		$sql='INSERT INTO posts(title,create_time,author_id) VALUES (:title, :create_time, 1)';
-		$command=$db->createCommand($sql);
-		$title='test title';
-		$createTime=time();
-		$command->bindParam(':title',$title);
-		$command->bindParam(':create_time',$createTime);
-		$command->execute();
-
-		$sql='SELECT create_time FROM posts WHERE title=:title';
-		$command=$db->createCommand($sql);
-		$command->bindParam(':title',$title);
-		$this->assertEquals($command->queryScalar(),$createTime);
-
-		$sql='INSERT INTO types (int_col, char_col, float_col, blob_col, numeric_col, bool_col) VALUES (:int_col, :char_col, :float_col, :blob_col, :numeric_col, :bool_col)';
-		$command=$db->createCommand($sql);
-		$intCol=123;
-		$charCol='abc';
-		$floatCol=1.23;
-		$blobCol="\x10\x11\x12";
-		$numericCol='1.23';
-		$boolCol=false;
-		$command->bindParam(':int_col',$intCol);
-		$command->bindParam(':char_col',$charCol);
-		$command->bindParam(':float_col',$floatCol);
-		$command->bindParam(':blob_col',$blobCol);
-		$command->bindParam(':numeric_col',$numericCol);
-		$command->bindParam(':bool_col',$boolCol);
-		$this->assertEquals(1,$command->execute());
-
-		$sql='SELECT * FROM types';
-		$row=$db->createCommand($sql)->queryRow();
-		$this->assertEquals($row['int_col'],$intCol);
-		$this->assertEquals($row['char_col'],$charCol);
-		$this->assertEquals($row['float_col'],$floatCol);
-		$this->assertEquals($row['blob_col'],$blobCol);
-		$this->assertEquals($row['numeric_col'],$numericCol);
-	}
+		$db = $this->getConnection();
 
-	function testBindValue()
-	{
-		$sql='INSERT INTO comments(content,post_id,author_id) VALUES (:content, 1, 1)';
-		$command=$db->createCommand($sql);
-		$command->bindValue(':content','test comment');
+		// bindParam
+		$sql = 'INSERT INTO yii_post(title,create_time,author_id) VALUES (:title, :create_time, 1)';
+		$command = $db->createCommand($sql);
+		$title = 'test title';
+		$createTime = time();
+		$command->bindParam(':title', $title);
+		$command->bindParam(':create_time', $createTime);
 		$command->execute();
 
-		$sql='SELECT post_id FROM comments WHERE content=:content';
-		$command=$db->createCommand($sql);
-		$command->bindValue(':content','test comment');
-		$this->assertEquals($command->queryScalar(),1);
-	}
-
-	function testQueryAll()
-	{
-		$rows=$db->createCommand('SELECT * FROM posts')->queryAll();
-		$this->assertEquals(count($rows),5);
-		$row=$rows[2];
-		$this->assertEquals($row['id'],3);
-		$this->assertEquals($row['title'],'post 3');
-
-		$rows=$db->createCommand('SELECT * FROM posts WHERE id=10')->queryAll();
-		$this->assertEquals($rows,array());
-	}
-
-	function testQueryRow()
-	{
-		$sql='SELECT * FROM posts';
-		$row=$db->createCommand($sql)->queryRow();
-		$this->assertEquals($row['id'],1);
-		$this->assertEquals($row['title'],'post 1');
-
-		$sql='SELECT * FROM posts';
-		$command=$db->createCommand($sql);
-		$command->prepare();
-		$row=$command->queryRow();
-		$this->assertEquals($row['id'],1);
-		$this->assertEquals($row['title'],'post 1');
-
-		$sql='SELECT * FROM posts WHERE id=10';
-		$command=$db->createCommand($sql);
-		$this->assertFalse($command->queryRow());
-
-		$command=$db->createCommand('bad SQL');
-		$this->setExpectedException('CException');
-		$command->queryRow();
-	}
+		$sql = 'SELECT create_time FROM yii_post WHERE title=:title';
+		$command = $db->createCommand($sql);
+		$command->bindParam(':title', $title);
+		$this->assertEquals($createTime, $command->queryScalar());
 
-	function testQueryColumn()
-	{
-		$sql='SELECT * FROM posts';
-		$column=$db->createCommand($sql)->queryColumn();
-		$this->assertEquals($column,range(1,5));
+		$sql = 'INSERT INTO yii_type (int_col, char_col, float_col, blob_col, numeric_col, bool_col) VALUES (:int_col, :char_col, :float_col, :blob_col, :numeric_col, :bool_col)';
+		$command = $db->createCommand($sql);
+		$intCol = 123;
+		$charCol = 'abc';
+		$floatCol = 1.23;
+		$blobCol = "\x10\x11\x12";
+		$numericCol = '1.23';
+		$boolCol = false;
+		$command->bindParam(':int_col', $intCol);
+		$command->bindParam(':char_col', $charCol);
+		$command->bindParam(':float_col', $floatCol);
+		$command->bindParam(':blob_col', $blobCol);
+		$command->bindParam(':numeric_col', $numericCol);
+		$command->bindParam(':bool_col', $boolCol);
+		$this->assertEquals(1, $command->execute());
+
+		$sql = 'SELECT * FROM yii_type';
+		$row = $db->createCommand($sql)->queryRow();
+		$this->assertEquals($intCol, $row['int_col']);
+		$this->assertEquals($charCol, $row['char_col']);
+		$this->assertEquals($floatCol, $row['float_col']);
+		$this->assertEquals($blobCol, $row['blob_col']);
+		$this->assertEquals($numericCol, $row['numeric_col']);
+
+		// bindValue
+		$sql = 'INSERT INTO yii_comment(content,post_id,author_id) VALUES (:content, 1, 1)';
+		$command = $db->createCommand($sql);
+		$command->bindValue(':content', 'test comment');
+		$command->execute();
 
-		$command=$db->createCommand('SELECT id FROM posts WHERE id=10');
-		$this->assertEquals($command->queryColumn(),array());
+		$sql = 'SELECT post_id FROM yii_comment WHERE content=:content';
+		$command = $db->createCommand($sql);
+		$command->bindValue(':content', 'test comment');
+		$this->assertEquals(1, $command->queryScalar());
 
-		$command=$db->createCommand('bad SQL');
-		$this->setExpectedException('CException');
-		$command->queryColumn();
+		// bind value via query or execute method
+		$sql = 'INSERT INTO yii_comment(content,post_id,author_id) VALUES (:content, 1, 1)';
+		$command = $db->createCommand($sql);
+		$command->execute(array(':content' => 'test comment2'));
+		$sql = 'SELECT post_id FROM yii_comment WHERE content=:content';
+		$command = $db->createCommand($sql);
+		$this->assertEquals(1, $command->queryScalar(array(':content' => 'test comment2')));
 	}
 
-	function testQueryScalar()
+	function testFetchMode()
 	{
-		$sql='SELECT * FROM posts';
-		$this->assertEquals($db->createCommand($sql)->queryScalar(),1);
-
-		$sql='SELECT id FROM posts';
-		$command=$db->createCommand($sql);
-		$command->prepare();
-		$this->assertEquals($command->queryScalar(),1);
-
-		$command=$db->createCommand('SELECT id FROM posts WHERE id=10');
-		$this->assertFalse($command->queryScalar());
-
-		$command=$db->createCommand('bad SQL');
-		$this->setExpectedException('CException');
-		$command->queryScalar();
-	}
+		$db = $this->getConnection();
 
-	function testFetchMode(){
-		$sql='SELECT * FROM posts';
-		$command=$db->createCommand($sql);
+		// default: FETCH_ASSOC
+		$sql = 'SELECT * FROM yii_post';
+		$command = $db->createCommand($sql);
 		$result = $command->queryRow();
-		$this->assertTrue(is_array($result));
+		$this->assertTrue(is_array($result) && isset($result['id']));
 
-		$sql='SELECT * FROM posts';
-		$command=$db->createCommand($sql);
-		$command->setFetchMode(PDO::FETCH_OBJ);
+		// FETCH_OBJ, customized via fetchMode property
+		$sql = 'SELECT * FROM yii_post';
+		$command = $db->createCommand($sql);
+		$command->fetchMode = \PDO::FETCH_OBJ;
 		$result = $command->queryRow();
 		$this->assertTrue(is_object($result));
+
+		// FETCH_NUM, customized in query method
+		$sql = 'SELECT * FROM yii_post';
+		$command = $db->createCommand($sql);
+		$result = $command->queryRow(array(), \PDO::FETCH_NUM);
+		$this->assertTrue(is_array($result) && isset($result[0]));
 	}
-	*/
 }
\ No newline at end of file