1 auto_increment with 2 primary keys

Question

My intention is to create a table with 2 primary keys with one of those autoincrementing and the other specified when inserting and when I create a new field for this table it must start the recount if the not incremented primary key changes. This is what I had:

I have been able to get this changing the table engine to MyISAM. But there is something missing, the auto_increment does not start at 100 as it happened before.

CREATE TABLE CONFIGURABLES(
    CODIEI2 INTEGER AUTO_INCREMENT,
    CODIEI1 INTEGER,
    SKU VARCHAR(30),
    COLOR INTEGER,
    COLOR2 INTEGER,
    TALLA INTEGER,
    CONSTRAINT PK_CODIEI PRIMARY KEY(CODIEI1,CODIEI2),
    CONSTRAINT FK_CODIEI1 FOREIGN KEY(CODIEI1) REFERENCES PRODUCTOS(ENTITY_ID) ON DELETE CASCADE,
    CONSTRAINT FK_CCOLOR FOREIGN KEY(COLOR) REFERENCES COLORES(CODICOL) ON DELETE CASCADE,
    CONSTRAINT FK_CCOLOR2 FOREIGN KEY(COLOR2) REFERENCES COLORES(CODICOL) ON DELETE CASCADE,
    CONSTRAINT FK_CTALLA FOREIGN KEY(TALLA) REFERENCES TALLAS(CODITLL) ON DELETE CASCADE) ENGINE=MyISAM;

ALTER TABLE CONFIGURABLES AUTO_INCREMENT = 100;

Is this happening because when the auto_increment value is different from the default number the engine must be set to InnoDB?

Is there a way to get it as I want?

SOLUTION:

The table can be back to InnoDB which is much better and there is no need for auto_increment on CONFIGURABLES table as this will be controlled when doing the insert.

CREATE TABLE CONFIGURABLES(
    CODIEI2 INTEGER,
    CODIEI1 INTEGER,
    SKU VARCHAR(30),
    COLOR INTEGER,
    COLOR2 INTEGER,
    TALLA INTEGER,
    CONSTRAINT PK_CODIEI PRIMARY KEY(CODIEI1,CODIEI2),
    CONSTRAINT FK_CODIEI1 FOREIGN KEY(CODIEI1) REFERENCES PRODUCTOS(ENTITY_ID) ON DELETE CASCADE,
    CONSTRAINT FK_CCOLOR FOREIGN KEY(COLOR) REFERENCES COLORES(CODICOL) ON DELETE CASCADE,
    CONSTRAINT FK_CCOLOR2 FOREIGN KEY(COLOR2) REFERENCES COLORES(CODICOL) ON DELETE CASCADE,
    CONSTRAINT FK_CTALLA FOREIGN KEY(TALLA) REFERENCES TALLAS(CODITLL) ON DELETE CASCADE);

And when doing the insert do this:

BEGIN;
    SELECT @id := IFNULL(MAX(CODIEI2)+1,100) FROM CONFIGURABLES WHERE CODIEI1 = 10001 FOR UPDATE;
    INSERT INTO CONFIGURABLES
    (CODIEI1,CODIEI2,SKU,COLOR,COLOR2,TALLA)
    VALUES
    (10001,@id,'',4,2,2);
COMMIT;

Answer 1

  BEGIN;
  SELECT @id := MAX(id)+1 FROM foo WHERE other = 123 FOR UPDATE;
  INSERT INTO foo
     (other, id, ...)
     VALUES
     (123, @id, ...);
  COMMIT;