public function isReadOnly()
    {
        $readOnly = false;
        $fields   = $this->getPart(Zend_Db_Table_Select::COLUMNS);
        $cols     = $this->_info[Zend_Db_Table_Abstract::COLS];

        if (!count($fields)) {
            return $readOnly;
        }

        foreach ($fields as $columnEntry) {
            $column = $columnEntry[1];
            $alias = $columnEntry[2];

            if ($alias !== null) {
                $column = $alias;
            }

            switch (true) {
                case ($column == self::SQL_WILDCARD):
                    break;

                case ($column instanceof Zend_Db_Expr):
                case (!in_array($column, $cols)):
                    $readOnly = true;
                    break 2;
            }
        }

        return $readOnly;
    }
public function isReadOnly()
    {
        $readOnly = false;
        $fields   = $this->getPart(Zend_Db_Table_Select::COLUMNS);
        $cols     = $this->_info[Zend_Db_Table_Abstract::COLS];

        if (!count($fields)) {
            return $readOnly;
        }

        foreach ($fields as $columnEntry) {
            $column = $columnEntry[1];
            $alias = $columnEntry[2];

            if ($alias !== null) {
                $column = $alias;
            }

            switch (true) {
                case ($column == self::SQL_WILDCARD):
                    break;

                case ($column instanceof Zend_Db_Expr):
                case (!in_array($column, $cols)):
                    $readOnly = true;
                    break 2;
            }
        }

        return $readOnly;
    }
public function isReadOnly ( ) { $ readOnly = false ; $ fields = $ this -> getPart ( Zend_Db_Table_Select :: COLUMNS ) ; $ cols = $ this -> _info [ Zend_Db_Table_Abstract :: COLS ] ; if ( ! count ( $ fields ) ) { return $ readOnly ; } foreach ( $ fields as $ columnEntry ) { $ column = $ columnEntry [ 1 ] ; $ alias = $ columnEntry [ 2 ] ; if ( $ alias !== null ) { $ column = $ alias ; } switch ( true ) { case ( $ column == self :: SQL_WILDCARD ) : break ; case ( $ column instanceof Zend_Db_Expr ) : case ( ! in_array ( $ column , $ cols ) ) : $ readOnly = true ; break 2 ; } } return $ readOnly ; }
Tests query to determine if expressions or aliases columns exist.

@return boolean
Tests query to determine if expressions or aliases columns exist .