returning_clause ::=
{ RETURNING | RETURN }
 [{single_row_expression [, single_row_expression]... INTO   
      {variable_name | :host_variable_name} 
      [, {variable_name | :host_variable_name}]...
 | multiple_row_expression [, multiple_row_expression]... [BULK COLLECT] INTO 
     { collection_name | :host_array_name } [, { collection_name | :host_array_name } ]... ];