Yii框架批量插入数据扩展类的简单实现方法

INSERT INTO tbl_name (a,b,c) VALUES(1,2,3),(4,5,6),(7,8,9);

<?php
/
  class for sql batch insert
 /
class CDbBICommand extends CDbCommand{
  / @var CActiveRecord $class /
  private $class;
  / @var string $insert_tpl /
  private $insert_tpl = "insert into %s(%s) ";
  / @var string $value_tpl /
  private $value_tpl = "(%s)";
  / @var string $query /
  public $query;
  / @var CDbColumnSchema[] $columns /
  private $columns;
  / @var boolean $fresh /
  private $fresh;
  / @param CActiveRecord $class
    @param CDbConnection $db
   /
  public function __construct($class,$db){
   $this->class = $class;
   $this->createtpl();
   parent::_construct($db);
  }
  private function createtpl(){
   $this->fresh = true;
   $value_tpl = "";
   $columns_string = "";
   $this->columns = $this->class->getMetaData()->tableSchema->columns;
   $counter = 0;
   foreach($this->columns as $column){
    / @var CDbColumnSchema $column /
    if($column->autoIncrement){
     $value_tpl .= "0";
    }else{
     $value_tpl .= "\"%s\"";
    }
    $columns_string .= $column->name;
    $counter ++;
    if($counter != sizeof($this->columns)){
     $columns_string .= ", ";
     $value_tpl .= ", ";
    }
   }
   $this->insert_tpl = sprintf($this->insert_tpl, $this->class->tableName(), $columns_string);
   $this->value_tpl = sprintf($this->value_tpl, $value_tpl);
  }
  /
    @param CActiveRecord $record
   /
  public function add($record){
   $values = array();
   $i = 0;
   foreach($this->columns as $column){
    if($column->autoIncrement){
     continue;
    }
    $values[$i] = $this->class->{$column->name};
    $i ++;
   }
   if(!$this->fresh){
    $this->query .= ",";
   }else{
    $this->query = "values";
   }
   $this->fresh = false;
   $this->query .= vsprintf($this->value_tpl, $values);
   return true;
  }
  public function execute(){
   $this->setText($this->insert_tpl." ".$this->query);
   return parent::execute();
  }
}