caassandra: condition multiple sur la même colonne

Question

create table:

CREATE TABLE notifications (
    id uuid PRIMARY KEY, 
    user_id bigint, 
    received_datetime timestamp, 
); 

cqlsh:

select count(*) 
    from notifications 
    where received_datetime >='2016-10-11 00:00:00' 
    and received_datetime >='2016-10-18 00:00:00' 
    ALLOW FILTERING; 

erreur a: -

InvalidRequest: Error from server: code=2200 [Invalid query] message="More than one restriction was found for the start bound on received_datetime" 

Answer 1

Je suppose que ce que vous voulez réellement est la requête suivante :

select count(*) from notifications 
    where received_datetime >='2016-10-11 00:00:00' 
    and received_datetime <='2016-10-18 00:00:00' 
    ALLOW FILTERING; 

Sinon, vous pouvez fusionner deux conditions liées plus bas dans l'un en choisissant plus restrictive d'entre eux:

select count(*) from notifications 
    where received_datetime >= '2016-10-18 00:00:00' 
    ALLOW FILTERING;