.' as t(id int, pid int, level int, branch text, pos int)';
if($level > 0){
$_sql .= ' where level >='.self::quote($level);
}
if($returnSql) return $_sql;
$_res = self::query(self::SELECT,$_sql,true)->execute($db)->as_array();
if($_res){
return $_res;
}else{
return false;
}
}
public static function begin($db='default'){
DB::query(Database::UPDATE, "BEGIN")->execute($db);
}
public static function commit($db='default'){
DB::query(Database::UPDATE, "COMMIT")->execute($db);
}
public static function rollback($db='default'){
DB::query(Database::UPDATE, "ROLLBACK")->execute($db);
}
/**
* Create a new [Database_Query] of the given type.
*
* // Create a new SELECT query
* $query = DB::query(Database::SELECT, 'SELECT * FROM users');
*
* // Create a new DELETE query
* $query = DB::query(Database::DELETE, 'DELETE FROM users WHERE id = 5');
*
* Specifying the type changes the returned result. When using
* `Database::SELECT`, a [Database_Query_Result] will be returned.
* `Database::INSERT` queries will return the insert id and number of rows.
* For all other queries, the number of affected rows is returned.
*
* @param integer type: Database::SELECT, Database::UPDATE, etc
* @param string SQL statement
* @return Database_Query
*/
public static function query($type, $sql,$as_object = false)
{
return new Database_Query($type, $sql,$as_object);
}
/**
* Create a new [Database_Query_Builder_Select]. Each argument will be
* treated as a column. To generate a `foo AS bar` alias, use an array.
*
* // SELECT id, username
* $query = DB::select('id', 'username');
*
* // SELECT id AS user_id
* $query = DB::select(array('id', 'user_id'));
*
* @param mixed column name or array($column, $alias) or object
* @param ...
* @return Database_Query_Builder_Select
*/
public static function select($columns = NULL)
{
return new Database_Query_Builder_Select(func_get_args());
}
/**
* Create a new [Database_Query_Builder_Select] from an array of columns.
*
* // SELECT id, username
* $query = DB::select_array(array('id', 'username'));
*
* @param array columns to select
* @return Database_Query_Builder_Select
*/
public static function select_array(array $columns = NULL)
{
return new Database_Query_Builder_Select($columns);
}
/**
* Create a new [Database_Query_Builder_Insert].
*
* // INSERT INTO users (id, username)
* $query = DB::insert('users', array('id', 'username'));
*
* @param string table to insert into
* @param array list of column names or array($column, $alias) or object
* @return Database_Query_Builder_Insert
*/
public static function insert($table = NULL, array $columns = NULL)
{
return new Database_Query_Builder_Insert($table, $columns);
}
/**
* Create a new [Database_Query_Builder_Update].
*
* // UPDATE users
* $query = DB::update('users');
*
* @param string table to update
* @return Database_Query_Builder_Update
*/
public static function update($table = NULL)
{
return new Database_Query_Builder_Update($table);