因此,由于异步支持,我最近在scala项目中从scalikejdbc转到了quill。
是否支持下面的示例中的任何sql语法?
INSERT INTO People (id, cityID)
SELECT 52, Cities.id
FROM Cities
WHERE Cities.name = 'New York City';
INSERT INTO State (id, numCities)
SELECT 4, COUNT(*)
FROM Cities
WHERE Cities.state = 'NY'
预期行为
我会尝试这样的事情
quote {
for {
count <- query[City].filter(_.state == 'NY').size
} yield query[State].insert(lift(State(4, count))
}
quote {
query[City].filter(_.state == 'NY').size.nested.insert(count => lift(State(4, count))
}
但会出现如下错误:
值Map不是long“about”.size的成员
嵌套不是long“about”.size的成员
当然,如果我像下面这样做,我会得到一堆错误:
quote {
for {
count <- List(query[City].filter(_.state == 'NY').size)
} yield query[State].insert(lift(State(4, count))
}
变通办法
目前唯一的解决方法似乎是运行两个独立的查询(一个用于获取计数,另一个用于插入)。但是,如果我做了大量基于select的插入,我会认为这会变得效率低下。
使用原始查询
我尝试过使用中缀的替代方法,例如:
quote {
infix"""
INSERT INTO Languages (id,iso639_1,name)
VALUES (
(SELECT x2.id + 1
FROM (SELECT id FROM Languages UNION SELECT 0) x2
LEFT JOIN Languages x1 ON (x2.id + 1) = x1.id
WHERE x1.id IS NULL LIMIT 1),
'Hello',
'World'
);
""".as[?]
}
但它不断地给出这些错误:
[error] (run-main-4a) com.github.mauricio.async.db.mysql.exceptions.MySQLException: Error 1064 - #42000 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INSERT INTO Languages (id,iso639_1,name)
[error] VALUES (
[error] (SELECT x2.id ' at line 2
[error] com.github.mauricio.async.db.mysql.exceptions.MySQLException: Error 1064 - #42000 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INSERT INTO Languages (id,iso639_1,name)
[error] VALUES (
[error] (SELECT x2.id ' at line 2
这是不正确的,因为我复制粘贴到一个sql浏览器的原始sql,它工作得非常好。
1条答案
按热度按时间omqzjyyz1#
//试验