Question

我已经配置了liquibase以在PostgreSQL中使用模式的多租户工作。当changelog仅创建仅依赖xml语法的表或结构时，它工作正常。但是，我需要创建一些依赖于 defaultSchemaName 参数的视图，因此我已经尝试过这种方法，但是没有成功：

<changeSet id="00000000000002_blog_views" author="hudson" dbms="postgresql">
    <createView viewName="blog_post_management_view" replaceIfExists="true">
            SELECT
              p.id,
              p.title,
              ba.name as author,
              p.status,
              p.created_date
            FROM ${defaultSchemaName}.blog_post p
              INNER JOIN ${defaultSchemaName}.blog_author ba ON p.author_id = ba.id
    </createView>
</changeSet>

执行上述更改日志时出现此错误：

Caused by: liquibase.exception.DatabaseException: ERROR: syntax error at or near "$"
Position: 258 [Failed SQL: CREATE VIEW "c7a53124-0ca9-4ce4-a25d-34b1764ee9df".blog_post_management_view AS SELECT
              p.id,
              p.title,
              ba.name as author,
              p.status,
              p.created_date
            FROM ${defaultSchemaName}.blog_post p
              INNER JOIN ${defaultSchemaName}.blog_author ba ON p.author_id = ba.id]
at liquibase.executor.jvm.JdbcExecutor$ExecuteStatementCallback.doInStatement(JdbcExecutor.java:309)
at liquibase.executor.jvm.JdbcExecutor.execute(JdbcExecutor.java:55)
at liquibase.executor.jvm.JdbcExecutor.execute(JdbcExecutor.java:113)
at liquibase.database.AbstractJdbcDatabase.execute(AbstractJdbcDatabase.java:1277)
at liquibase.database.AbstractJdbcDatabase.executeStatements(AbstractJdbcDatabase.java:1259)
at liquibase.changelog.ChangeSet.execute(ChangeSet.java:582)
... 29 common frames omitted
Caused by: org.postgresql.util.PSQLException: ERROR: syntax error at or near "$"

重要的是，我的liquibase运行器已经配置了defaultSchemaName：

@Bean
@DependsOn("liquibase")
public MultiTenantSpringLiquibase multiTenantLiquibase(DataSource dataSource, LiquibaseProperties liquibaseProperties) {
    MultiTenantSpringLiquibase liquibase = new CustomMultiTenantSpringLiquibase();
    liquibase.setDataSource(dataSource);
    liquibase.setChangeLog("classpath:config/liquibase/master.xml");
    liquibase.setContexts(liquibaseProperties.getContexts());
    liquibase.setDefaultSchema(liquibaseProperties.getDefaultSchema());
    liquibase.setDropFirst(liquibaseProperties.isDropFirst());
    liquibase.setSchemas(getSchemas(dataSource));
    if (env.acceptsProfiles(JHipsterConstants.SPRING_PROFILE_NO_LIQUIBASE)) {
        liquibase.setShouldRun(false);
    } else {
        liquibase.setShouldRun(liquibaseProperties.isEnabled());
        log.debug("Configuring Multi Tenant Liquibase");
    }
    liquibase.setParameters(DatabaseUtil.defaultParams(liquibaseProperties.getDefaultSchema()));
    return liquibase;
}

是否可以在createView标签内容中使用属性或任何类型的系统变量？

Answer 1

您可以使用属性文件中的架构名称：

@Value("${spring.jpa.properties.hibernate.default_schema}")
private String schemaName;

现在，您可以在代码中使用schemaName变量了。

Answer 2

我意识到我需要手动添加参数，在我看来，仅设置defaultSchema属性（liquibase.setDefaultSchema("something");才能访问“ defaultSchema”参数：

 Map<String, String> parameters = new HashMap<>();
 parameters.put("schemaName", schema);
 liquibase.setChangeLogParameters(parameters);

Liquibase-createView语句中的自定义参数

2 个答案: