original_string: public function assemble()
      {
          $fields  = $this->getPart(Zend_Db_Table_Select::COLUMNS);
          $primary = $this->_info[Zend_Db_Table_Abstract::NAME];
          $schema  = $this->_info[Zend_Db_Table_Abstract::SCHEMA];
  
  
          if (count($this->_parts[self::UNION]) == 0) {
  
              // If no fields are specified we assume all fields from primary table
              if (!count($fields)) {
                  $this->from($primary, self::SQL_WILDCARD, $schema);
                  $fields = $this->getPart(Zend_Db_Table_Select::COLUMNS);
              }
  
              $from = $this->getPart(Zend_Db_Table_Select::FROM);
  
              if ($this->_integrityCheck !== false) {
                  foreach ($fields as $columnEntry) {
                      list($table, $column) = $columnEntry;
  
                      // Check each column to ensure it only references the primary table
                      if ($column) {
                          if (!isset($from[$table]) || $from[$table]['tableName'] != $primary) {
                              // require_once 'Zend/Db/Table/Select/Exception.php';
                              throw new Zend_Db_Table_Select_Exception('Select query cannot join with another table');
                          }
                      }
                  }
              }
          }
  
          return parent::assemble();
      }
code: public function assemble()
      {
          $fields  = $this->getPart(Zend_Db_Table_Select::COLUMNS);
          $primary = $this->_info[Zend_Db_Table_Abstract::NAME];
          $schema  = $this->_info[Zend_Db_Table_Abstract::SCHEMA];
  
  
          if (count($this->_parts[self::UNION]) == 0) {
  
              // If no fields are specified we assume all fields from primary table
              if (!count($fields)) {
                  $this->from($primary, self::SQL_WILDCARD, $schema);
                  $fields = $this->getPart(Zend_Db_Table_Select::COLUMNS);
              }
  
              $from = $this->getPart(Zend_Db_Table_Select::FROM);
  
              if ($this->_integrityCheck !== false) {
                  foreach ($fields as $columnEntry) {
                      list($table, $column) = $columnEntry;
  
                      // Check each column to ensure it only references the primary table
                      if ($column) {
                          if (!isset($from[$table]) || $from[$table]['tableName'] != $primary) {
                              // require_once 'Zend/Db/Table/Select/Exception.php';
                              throw new Zend_Db_Table_Select_Exception('Select query cannot join with another table');
                          }
                      }
                  }
              }
          }
  
          return parent::assemble();
      }
code_tokens: public function assemble ( ) { $ fields = $ this -> getPart ( Zend_Db_Table_Select :: COLUMNS ) ; $ primary = $ this -> _info [ Zend_Db_Table_Abstract :: NAME ] ; $ schema = $ this -> _info [ Zend_Db_Table_Abstract :: SCHEMA ] ; if ( count ( $ this -> _parts [ self :: UNION ] ) == 0 ) { // If no fields are specified we assume all fields from primary table if ( ! count ( $ fields ) ) { $ this -> from ( $ primary , self :: SQL_WILDCARD , $ schema ) ; $ fields = $ this -> getPart ( Zend_Db_Table_Select :: COLUMNS ) ; } $ from = $ this -> getPart ( Zend_Db_Table_Select :: FROM ) ; if ( $ this -> _integrityCheck !== false ) { foreach ( $ fields as $ columnEntry ) { list ( $ table , $ column ) = $ columnEntry ; // Check each column to ensure it only references the primary table if ( $ column ) { if ( ! isset ( $ from [ $ table ] ) || $ from [ $ table ] [ 'tableName' ] != $ primary ) { // require_once 'Zend/Db/Table/Select/Exception.php'; throw new Zend_Db_Table_Select_Exception ( 'Select query cannot join with another table' ) ; } } } } } return parent :: assemble ( ) ; }
docstring: Performs a validation on the select query before passing back to the parent class.
  Ensures that only columns from the primary Zend_Db_Table are returned in the result.
  
  @return string|null This object as a SELECT string (or null if a string cannot be produced)
docstring_tokens: Performs a validation on the select query before passing back to the parent class . Ensures that only columns from the primary Zend_Db_Table are returned in the result .