original_string: public function _joinUsing($type, $name, $cond, $cols = '*', $schema = null)
      {
          if (empty($this->_parts[self::FROM])) {
              // require_once 'Zend/Db/Select/Exception.php';
              throw new Zend_Db_Select_Exception("You can only perform a joinUsing after specifying a FROM table");
          }
  
          $join  = $this->_adapter->quoteIdentifier(key($this->_parts[self::FROM]), true);
          $from  = $this->_adapter->quoteIdentifier($this->_uniqueCorrelation($name), true);
  
          $cond1 = $from . '.' . $cond;
          $cond2 = $join . '.' . $cond;
          $cond  = $cond1 . ' = ' . $cond2;
  
          return $this->_join($type, $name, $cond, $cols, $schema);
      }
code: public function _joinUsing($type, $name, $cond, $cols = '*', $schema = null)
      {
          if (empty($this->_parts[self::FROM])) {
              // require_once 'Zend/Db/Select/Exception.php';
              throw new Zend_Db_Select_Exception("You can only perform a joinUsing after specifying a FROM table");
          }
  
          $join  = $this->_adapter->quoteIdentifier(key($this->_parts[self::FROM]), true);
          $from  = $this->_adapter->quoteIdentifier($this->_uniqueCorrelation($name), true);
  
          $cond1 = $from . '.' . $cond;
          $cond2 = $join . '.' . $cond;
          $cond  = $cond1 . ' = ' . $cond2;
  
          return $this->_join($type, $name, $cond, $cols, $schema);
      }
code_tokens: public function _joinUsing ( $ type , $ name , $ cond , $ cols = '*' , $ schema = null ) { if ( empty ( $ this -> _parts [ self :: FROM ] ) ) { // require_once 'Zend/Db/Select/Exception.php'; throw new Zend_Db_Select_Exception ( "You can only perform a joinUsing after specifying a FROM table" ) ; } $ join = $ this -> _adapter -> quoteIdentifier ( key ( $ this -> _parts [ self :: FROM ] ) , true ) ; $ from = $ this -> _adapter -> quoteIdentifier ( $ this -> _uniqueCorrelation ( $ name ) , true ) ; $ cond1 = $ from . '.' . $ cond ; $ cond2 = $ join . '.' . $ cond ; $ cond = $ cond1 . ' = ' . $ cond2 ; return $ this -> _join ( $ type , $ name , $ cond , $ cols , $ schema ) ; }
docstring: Handle JOIN... USING... syntax
  
  This is functionality identical to the existing JOIN methods, however
  the join condition can be passed as a single column name. This method
  then completes the ON condition by using the same field for the FROM
  table and the JOIN table.
  
  <code>
  $select = $db->select()->from('table1')
  ->joinUsing('table2', 'column1');
  
  // SELECT * FROM table1 JOIN table2 ON table1.column1 = table2.column2
  </code>
  
  These joins are called by the developer simply by adding 'Using' to the
  method name. E.g.
  * joinUsing
  * joinInnerUsing
  * joinFullUsing
  * joinRightUsing
  * joinLeftUsing
  
  @return Zend_Db_Select This Zend_Db_Select object.
docstring_tokens: Handle JOIN ... USING ... syntax