Question

此CQL查询有什么问题

cqlsh> create table citybizz.notifications(
   ...      userId varchar,
   ...      notifId UUID,
   ...      notification varchar,
   ...      time bigint,read boolean,
   ...      primary key (userId, notifId,time)
   ... ) with clustering order by (time desc);

抛出Bad Request: Missing CLUSTERING ORDER for column notifid。我正在使用cassandra 1.2.2

Answer 1

您还需要指定notifId的顺序：

create table citybizz.notifications(
    userId varchar,
    notifId UUID,
    notification varchar,
    time bigint,read boolean,
    primary key (userId, notifId,time)
) with clustering order by (notifId asc, time desc);

Cassandra并不假设其他群集密钥的默认排序（asc），因此您需要指定它。

CQL：错误请求：缺少列的CLUSTERING ORDER

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