mysql约束的liquibase迁移-成功时出错

我在迁移中有以下更改集：

<changeSet author="aaa (generated)" id="1416295794385-38" objectQuotingStrategy="QUOTE_ALL_OBJECTS">
        <addForeignKeyConstraint baseColumnNames="fk_xxx_id" baseTableName="client_xxxs" constraintName="FK_2kma3uvjxartf5p9l24yk2fxu" deferrable="false" initiallyDeferred="false" onDelete="NO ACTION" onUpdate="NO ACTION" referencedColumnNames="id" referencedTableName="xxx_types"/>
</changeSet>

但是当我在mysql中检查模式时，这个约束似乎被应用了。这是我唯一一次应用约束，以前从未应用过

show create table client_xxxs;
| client_xxxs | CREATE TABLE `client_xxxs` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  ...
  `fk_xxx_id` int(11) NOT NULL,
  `xxx_time` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
  `create_time` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
  PRIMARY KEY (`id`),
  KEY `FK_2kma3uvjxartf5p9l24yk2fxu` (`fk_xxx_id`),
  CONSTRAINT `FK_2kma3uvjxartf5p9l24yk2fxu` FOREIGN KEY (`fk_xxx_id`) REFERENCES `xxx_types` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB DEFAULT CHARSET=utf8 |

这将阻止迁移完成

导致此异常的原因是什么，是错误还是未命中 模式触发了它？ 是否可以忽略错误并使用 剩下的迁移？ 还验证了直接在mysql控制台中使用约束应用程序可以正常工作

mysql> alter table client_xxxs add  CONSTRAINT `x-FK_2kma3uvjxartf5p9l24yk2fxu` FOREIGN KEY (`fk_xxx_id`) REFERENCES `xxx_types` (`id`);
Query OK, 0 rows affected (0.81 sec)
Records: 0  Duplicates: 0  Warnings: 0

show create ...
CONSTRAINT `x-FK_2kma3uvjxartf5p9l24yk2fxu` FOREIGN KEY (`fk_xxx_id`) REFERENCES `xxx_types` (`id`),

---

当Liquibase尝试添加约束时，mysql抛出了您看到的错误。我认为错误是由于基列中的数据与引用列中的数据不匹配。我希望不会创建外键，但mysql可能仍然会创建外键

如果您运行select*from client_xxxs，其中fk_xxx_id不在select id from xxx_type中，您会得到任何结果吗

mysql> alter table client_xxxs add  CONSTRAINT `x-FK_2kma3uvjxartf5p9l24yk2fxu` FOREIGN KEY (`fk_xxx_id`) REFERENCES `xxx_types` (`id`);
Query OK, 0 rows affected (0.81 sec)
Records: 0  Duplicates: 0  Warnings: 0

show create ...
CONSTRAINT `x-FK_2kma3uvjxartf5p9l24yk2fxu` FOREIGN KEY (`fk_xxx_id`) REFERENCES `xxx_types` (`id`),