在 CQL 问题中选择查询

Question

我正在尝试获取 cassandra DB 中表的计数，我正在运行以下查询：

select count(*) 
from bssapi.call_detail_records 
WHERE 
year = 2020 
and month = 3
and event_at > '2020-03-01 07:45:51+0000' ALLOW FILTERING;

我得到的错误是：

InvalidRequest: code=2200 [Invalid query] message="Partitioning column "year" cannot be restricted because the preceding column ("ColumnDefinition{name=subscription_id, type=org.apache.cassandra.db.marshal.UTF8Type, kind=PARTITION_KEY, componentIndex=0, indexName=null, indexType=null}") is either not restricted or is restricted by a non-EQ relation"

当我通过添加订阅 ID 过滤查询时，系统会正确返回计数，仅当我对所有表运行计数时才会出现此问题。

Answer 1

我得到了这个问题的解决方案，我使用了下面的查询：

select COUNT(*) from bssapi.call_detail_records WHERE event_at > '2020-03-22 07:45:51+0000' ALLOW FILTERING;