original_string: protected function _list_columns($table = '')
  	{
  		return 'SELECT "colname" FROM "syscat"."columns"
  			WHERE LOWER("tabschema") = '.$this->escape(strtolower($this->database)).'
  				AND LOWER("tabname") = '.$this->escape(strtolower($table));
  	}
code: protected function _list_columns($table = '')
  	{
  		return 'SELECT "colname" FROM "syscat"."columns"
  			WHERE LOWER("tabschema") = '.$this->escape(strtolower($this->database)).'
  				AND LOWER("tabname") = '.$this->escape(strtolower($table));
  	}
code_tokens: protected function _list_columns ( $ table = '' ) { return 'SELECT "colname" FROM "syscat"."columns"
  			WHERE LOWER("tabschema") = ' . $ this -> escape ( strtolower ( $ this -> database ) ) . '
  				AND LOWER("tabname") = ' . $ this -> escape ( strtolower ( $ table ) ) ; }
docstring: Show column query
  
  Generates a platform-specific query string so that the column names can be fetched
  
  @param	string	$table
  @return	array
docstring_tokens: Show column query