如何在where子句中使用带有in运算符的值列表?

lskq00tm  于 2021-06-14  发布在  Cassandra
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我正在尝试使用javascript驱动程序执行这样的查询:

client.execute('SELECT * FROM zhos_dev.jw_testing WHERE a IN ?', [['foo', 'foo1']], {prepare: true})

它给了我: ResponseError: line 0:-1 mismatched input '<EOF>' expecting ')' .
我的版本是: [cqlsh 3.1.8 | Cassandra 1.2.19 | CQL spec 3.0.5 | Thrift protocol 19.36.2] 该表已创建并填充了以下cql:

CREATE TABLE zhos_dev.jw_testing (a text PRIMARY KEY, b text);
INSERT INTO zhos_dev.jw_testing (a, b) VALUES ('foo', 'bar');
INSERT INTO zhos_dev.jw_testing (a, b) VALUES ('foo1', 'bar1');
INSERT INTO zhos_dev.jw_testing (a, b) VALUES ('foo2', 'bar2');
eulz3vhy

eulz3vhy1#

这个问题在faq中,但在实际通话的文档中没有,我在stackoverflow上很难找到它,所以我想把它复制到这里:
引用https://docs.datastax.com/en/developer/nodejs-driver/4.1/faq/#how-can-i-use-a-list-of-values-with-the-in-operator-in-a-where-子句:
在查询中使用in运算符,后跟不带括号的问号占位符。包含值列表的参数应该是数组的示例。

0md85ypi

0md85ypi2#

我在同一个版本中复制了这一点:[cqlsh 3.1.8 | cassandra 1.2.19 | cql spec 3.0.5 | thrift protocol 19.36.2]

name: 'ResponseError',
  info: 'Represents an error message from the server',
  message: "line 0:-1 mismatched input '<EOF>' expecting ')'",
  code: 8192,
  query: 'SELECT name, color FROM keyspace1.dresses WHERE id IN ?'

早在cassandra 2.1中,“in”子句就可以正常工作:[cqlsh 5.0.1 | cassandra 2.1.21 | cql spec 3.2.1 | native protocol v3]

Connected to cluster with 1 host(s): ["127.0.0.1:9042"]
Azul Dress

测试表/数据:

CREATE KEYSPACE keyspace1 WITH replication = {'class':'SimpleStrategy', 'replication_factor' : 1 };

CREATE TABLE keyspace1.dresses (id text, color text, name text, size int, PRIMARY KEY (id, color));

insert into dresses (id, color, name, size) values ('mon1', 'blue', 'Blue Dress', 12);
insert into dresses (id, color, name, size) values ('mon2', 'blue', 'Azul Dress', 12);
insert into dresses (id, color, name, size) values ('can1', 'green', 'Green Dress', 12);
insert into dresses (id, color, name, size) values ('can2', 'verde', 'Verde Dress', 12);

和代码:

const cassandra = require('cassandra-driver');

const client = new cassandra.Client({ contactPoints: ['127.0.0.1'], localDataCenter: 'datacenter1' });
client.connect(function (err) {
  if (err) return console.error(err);
  console.log('Connected to cluster with %d host(s): %j', client.hosts.length, client.hosts.keys());
});

client.execute('SELECT name, color FROM keyspace1.dresses WHERE id IN ?', [ ['mon2'] ], 
    { prepare: true}, 
    function (err, result) {
          if (err) return console.error(err);
          const row = result.first();
          console.log(row['name']);
});

因为node.js驱动程序仅在cassandra 2.1及更高版本中受支持(https://docs.datastax.com/en/developer/nodejs-driver/4.1/faq/#which-cassandra的版本(驱动程序是否支持),我不认为cassandra或驱动程序项目会接受bug请求。你能至少升级到2.1吗?

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