Initial value does not seem to work under mysql.

@Table(name = "esender_mail")
@TableGenerator (name="esender_mail_id_gen",
table="generated_ids",
pkColumnName="GEN_KEY",
valueColumnName="GEN_VALUE",
pkColumnValue="esender_mail",
initialValue=100,
allocationSize=1)

@Id
@GeneratedValue(generator ="esender_mail_id_gen", strategy = GenerationType.TABLE)
@Column(name = "mail_id", nullable = false)
private Integer mailId;