When using @Converter with return type Integer in Entity, Schema validation returns exception (when in DB is varchar):

  // Don't work
  @Id @Column(name = "SERVICE_SOURCE_CODE")
  @Convert(converter = StringToIntegerConverter.class)
  private Integer serviceCode;

  // Works (workaround)
  @Id @Column(name = "SERVICE_SOURCE_CODE2", columnDefinition = "varchar(480)")
  @Convert(converter = StringToIntegerConverter.class)
  private Integer serviceCode2;

Schema-validation: wrong column type encountered in column [SERVICE_SOURCE_CODE] in table [EXF_B2B]; found varchar (Types#VARCHAR), but expecting integer (Types#INTEGER)
at org.hibernate.tool.schema.internal.AbstractSchemaValidator.validateColumnType(AbstractSchemaValidator.java:159)