我正在尝试使用cassandra节点驱动程序并在插入记录时遇到问题,看起来cassandra驱动程序无法插入浮点值。
Problem: When passing int value for insertion in db, api gives following error:
Debug: hapi, internal, implementation, error
ResponseError: Expected 4 or 0 byte int (8)
at FrameReader.readError (/home/gaurav/Gaurav-Drive/code/nodejsWorkspace/cassandraTest/node_modules/cassandra-driver/lib/readers.js:291:13)
at Parser.parseError (/home/gaurav/Gaurav-Drive/code/nodejsWorkspace/cassandraTest/node_modules/cassandra-driver/lib/streams.js:185:45)
at Parser.parseBody (/home/gaurav/Gaurav-Drive/code/nodejsWorkspace/cassandraTest/node_modules/cassandra-driver/lib/streams.js:167:19)
at Parser._transform (/home/gaurav/Gaurav-Drive/code/nodejsWorkspace/cassandraTest/node_modules/cassandra-driver/lib/streams.js:101:10)
at Parser.Transform._read (_stream_transform.js:179:10)
at Parser.Transform._write (_stream_transform.js:167:12)
at doWrite (_stream_writable.js:225:10)
at writeOrBuffer (_stream_writable.js:215:5)
at Parser.Writable.write (_stream_writable.js:182:11)
at write (_stream_readable.js:601:24)
我正在尝试从代码中执行以下查询:
INSERT INTO ragchews.user
(uid ,iid ,jid ,jpass ,rateCount ,numOfratedUser ,hndl ,interests ,locX ,locY ,city )
VALUES
('uid_1',{'iid1'},'jid_1','pass_1',25, 10, {'NEX1231'}, {'MUSIC'}, 21.321, 43.235, 'delhi');
传递给execute()
的参数是
var params = [uid, iid, jid, jpass, rateCount, numOfratedUser, hndl, interest, locx, locy, city];
,其中
var locx = 32.09;
var locy = 54.90;
并调用执行如下:
var addUserQuery = 'INSERT INTO ragchews.user (uid ,iid ,jid ,jpass ,rateCount ,numOfratedUser ,hndl ,interests ,locX ,locY ,city) VALUES (?,?,?,?,?,?,?,?,?,?,?);';
var addUser = function(user, cb){
console.log(user);
client.execute(addUserQuery, user, function(err, result){
if(err){
throw err;
}
cb(result);
});
};
CREATE TABLE ragchews.user(
uid varchar,
iid set<varchar>,
jid varchar,
jpass varchar,
rateCount int,
numOfratedUser int,
hndl set<varchar>,
interests set<varchar>,
locX float,
locY float,
city varchar,
favorite map<varchar, varchar>,
PRIMARY KEY(uid)
);
P.S 在尝试理解问题时的一些观察结果:
this problem may be associated with numeric types
。答案 0 :(得分:27)
以下字词是从cassandra node driver data type documentation
中挑选出来的对数据进行编码时,在使用参数执行的正常操作中,驱动程序会尝试根据输入类型猜测目标类型。 Number类型的值将被编码为double(因为Number是double / IEEE 754值)。
考虑以下示例:
var key = 1000;
client.execute('SELECT * FROM table1 where key = ?', [key], callback);
如果键列的类型为int,则执行失败。有两种方法可以避免此类问题:
准备数据(推荐) - 在执行前准备查询
client.execute('SELECT * FROM table1 where key = ?', [key], { prepare : true }, callback);
提示目标类型 - 提示:第一个参数是整数。
client.execute('SELECT * FROM table1 where key = ?', [key], { hints : ['int'] }, callback);
如果您正在处理批量更新,那么this issue可能是您感兴趣的。