liquibase - 用 liquibase 改变柱长

Question

我在使用 liquibase 更改 postgres 数据库中的列长度时遇到问题。

我有一个带有字段描述 varchar(300) 的表帐户。我想把它改成 varchar(2000)。

我在同一个文件中删除并重新创建了主键，所以我没有权限问题或架构/数据库名称或类似的东西。为了测试，我已经清除了数据表。

我在运行

<changeSet author="liquibase" id="sample">
    <modifyDataType
        columnName="description"
        newDataType="varchar(2000)"
        schemaName="accountschema"
        tableName="account"/>
</changeSet>

我收到此错误文本，但我无法理解问题。该列的唯一约束是非空约束，我成功添加了一个单独的更改日志来删除此约束(忽略我不明白为什么这会影响扩展字段长度的事实)。

谁能指出我做错了什么？

FAILURE:构建失败，出现异常。

什么地方出了错:

任务 ':db-management:update' 执行失败。

liquibase.exception.LiquibaseException: Unexpected error running Liquibase: Error parsing line 37 column 38 of src/main/changelog/db.changelog-accountdb-1.1.xml: cvc-complex-type.2.4.a: Invalid content was found starting with element 'modifyDataType'. One of '{"http://www.liquibase.org/xml/ns/dbchangelog/1.9":validCheckSum, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":preConditions, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":tagDatabase, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":comment, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":createTable, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":dropTable, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":createView, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":renameView, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":dropView, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":insert, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":addColumn, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":sql, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":createProcedure, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":sqlFile, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":renameTable, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":renameColumn, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":dropColumn, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":modifyColumn, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":mergeColumns, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":createSequence, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":alterSequence, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":dropSequence, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":createIndex, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":dropIndex, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":addNotNullConstraint, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":dropNotNullConstraint, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":addForeignKeyConstraint, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":dropForeignKeyConstraint, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":dropAllForeignKeyConstraints, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":addPrimaryKey, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":dropPrimaryKey, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":addLookupTable, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":addAutoIncrement, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":addDefaultValue, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":dropDefaultValue, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":addUniqueConstraint, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":dropUniqueConstraint, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":customChange, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":update, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":delete, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":loadData, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":executeCommand, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":stop, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":rollback, "http://www.liquibase.org/xml/ns/dbchangelog/1.9":modifySql}' is expected.

Answer 1

您可以像这样增加列的大小:

<changeSet author="liquibase" id="sample">
    <modifyDataType
        columnName="description"
        newDataType="varchar(2000)"
        tableName="account"/>
</changeSet>