INSERT INTO <TABLE> VALUES <VALUES> RETURNING <FIELDS> INTO <HOST_VARIABLES>

create or replace table party (

    id_party bigint unsigned not null,

    field1 char,

    field2 char,

    field3 char

    primary key (id_party))

engine = innodb;

create or replace sequence seq_id_party start by 1 increment by 1;

delimiter $$

create or replace procedure create_party(inout io_reg_party row type of party)

begin

    -- Validate io_reg_party's input fields.

    insert into party (

        id_party,

        field1,

        field2,

        field3)

    values (

        next value for seq_id_party,

        io_reg_party.field1,

        io_reg_party.field2,

        io_reg_party.field3)

    returning

        id_party

    into

        io_reg_party.id_party;

end

$$

delimiter ;