oracle - DbUnit HSQLDB - 无效的模式名称：C

Question

当使用以下查询运行测试时，HSQLDB 将表别名误认为是模式。

SELECT c.country_ml2country as CTRY_PK, c.name as CTRY_NAME,
l.name as LANGUAGE_NAME, l.code as LANGUAGE_CODE
FROM country_ml as c, language as l
WHERE c.language(+) = l.id and c.country_ml2country(+) = ?
ORDER BY l.name ASC;

有谁之前经历过这个吗？如果“是”，那么解决方法是什么？

请注意，如果我更改FROM country_ml as c为FROM country_ml as bob，则错误消息会相应更改为invalid schema name: BOB。

Answer 1

问题是非标准的 Oracle 风格的 OUTER JOIN 语法，它是 Oracle 特有的，其他 SQL 方言不支持。

WHERE c.language(+) = l.id and c.country_ml2country(+) = ?

您应该改用 Oracle 也支持的以下标准语法：

SELECT c.country_ml2country as CTRY_PK, c.name as CTRY_NAME,
l.name as LANGUAGE_NAME, l.code as LANGUAGE_CODE
FROM country_ml as c RIGHT OUTER JOIN language as l
ON c.language = l.id and c.country_ml2country = ?
ORDER BY l.name ASC