有人知道如何将不确定的参数传递给client.preparedQuery
吗?请看下图,感谢您的帮助!
@Override
public Future<List<User>> getByIds(List<String> ids) {
Promise<List<User>> promise = Promise.promise();
// How to pass the uncertain parameters to preparedQuery?
pool.preparedQuery("SELECT * FROM users WHERE id IN ($1)", Tuple.wrap(ids.toArray()), ar -> {
if (ar.succeeded()) {
RowSet<Row> rows = ar.result();
List<User> users = new ArrayList<>();
for (Row row : rows) {
User user = User.fromDatabaseRow(row);
users.add(user);
}
promise.complete(users);
} else {
promise.fail(ar.cause());
}
});
return promise.future();
}
最佳答案
要将数组传递给 PostgreSQL,您必须使用 = ANY(params)
而不是 IN(params)
SELECT * FROM users WHERE id = ANY($1)
此外,您必须将字符串数组传递给 ANY
,您的代码应该是:
pool.preparedQuery(
"SELECT * FROM users WHERE id = ANY($1)",
Tuple.of(ids.toArray(String[]::new)),
ar -> {..}
)
关于java - 如何在使用reactive-postgresql-client时将不确定的参数传递给preparedQuery?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/60224938/