keyHolder.getKey() return null

lobs :

Why code from "Spring in action 5" don't work (keyHolder.getKey() return null, but entity is saved in DB)?

private long savePizzaInfo(Pizza pizza) {
    pizza.setCreatedAt(new Date());
    PreparedStatementCreator psc =
            new PreparedStatementCreatorFactory(
                    "insert into PIZZA (name, createdAt) values (?, ?)",
                    Types.VARCHAR, Types.TIMESTAMP
            ).newPreparedStatementCreator(
                    Arrays.asList(
                            pizza.getName(),
                            new Timestamp(pizza.getCreatedAt().getTime())));
    KeyHolder keyHolder = new GeneratedKeyHolder();
    template.update(psc, keyHolder);
    return keyHolder.getKey().longValue();
}

My DB Table:

CREATE TABLE PIZZA
(
ID bigint DEFAULT (NEXT VALUE FOR 
PUBLIC.SYSTEM_SEQUENCE_12CA966F_4FFD_469C_BA69_80BB93916EF3) AUTO_INCREMENT 
PRIMARY KEY NOT NULL,
NAME varchar(50) NOT NULL,
CREATEDAT timestamp NOT NULL
);
CREATE UNIQUE INDEX PRIMARY_KEY_4 ON PIZZA (ID);

user10639668 :

You have to instruct PreparedStatementCreatorFactory instance to return the generated keys:

PreparedStatementCreatorFactory preparedStatementCreatorFactory = new PreparedStatementCreatorFactory(
         "insert into PIZZA (name, createdAt) values (?, ?)",
         Types.VARCHAR, Types.TIMESTAMP
 );

// By default, returnGeneratedKeys = false so change it to true
preparedStatementCreatorFactory.setReturnGeneratedKeys(true);

 PreparedStatementCreator psc =
         preparedStatementCreatorFactory.newPreparedStatementCreator(
                    Arrays.asList(
                            pizza.getName(),
                            new Timestamp(pizza.getCreatedAt().getTime())));