我当前在数据库中通过liquibase使用以下脚本创建的枚举类型:
- changeSet:
id: id_1
author: my_team
changes:
- sql: CREATE TYPE my_team.letters AS ENUM ('A', 'B', 'C')
由于我需要在枚举中添加字母D,因此我创建了一个新的枚举
- changeSet:
id: id_2
author: my_team
changes:
- sql: CREATE TYPE my_team.letters_2 AS ENUM ('A', 'B', 'C', 'D')
然后我更新类型
- changeSet:
id: id_3
author: my_team
changes:
- modifyDataType:
columnName: letter
newDataType: my_team.letters_2
schemaName: my_team
tableName: table_name
执行Liquibase脚本时出现以下错误
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liquibase' defined in class path resource [org/springframework/boot/autoconfigure/liquibase/LiquibaseAutoConfiguration$LiquibaseConfiguration.class]: Invocation of init method failed; nested exception is liquibase.exception.MigrationFailedException: Migration failed for change set db/changelog/ddl-my_team-v.0.0.15.my_team::id_3::my_team team:
Reason: liquibase.exception.DatabaseException: ERROR: cannot cast type my_team.letters to my_team.letters_2
Position: 89 [Failed SQL: (0) ALTER TABLE my_team.table_name ALTER COLUMN case_status TYPE my_team.letters_2 USING (letter::my_team.letters_2)]
我不明白为什么,因为目标类型包括原始值的所有值。
这可以做到吗?
预先感谢
答案 0 :(得分:1)
我不是Postgres专家,但是我认为以下方法可以解决问题:
letter
重命名为letter_copy
。letter
的新列letters_2
。letter_copy
复制到letter
。也许您需要从letter_copy
中复制值,像update table_name set letter = letter_copy::text::letters;
这样的文本。letter_copy
。现在table_name.letter
列应为letters_2
枚举类型,所有值都将从枚举letters
转换为枚举letters_2
。
答案 1 :(得分:1)
没有必要创建另一个枚举并跳过所有内容。只是alter the existing枚举:
cdfCompare