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Range Queries in Cassandra (CQL 3.0)


Range Queries in Cassandra (CQL 3.0)

By : Rod
Date : November 27 2020, 01:01 AM
Any of those help You can look for clustering keys. A primary key can be formed by a partitioning key and then by clustering keys.
for example definition like this one
code :


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Cassandra: Making range queries

Cassandra: Making range queries


By : Karthi S
Date : March 29 2020, 07:55 AM
Hope this helps In CQL the query would be:
code :
select 100..200 from journals where name = 'bob';
select value from journals where name = 'bob' and column > 100 and column < 200;
range queries in cassandra

range queries in cassandra


By : Carlos Noval
Date : March 29 2020, 07:55 AM
hope this fix your issue The following is working as expected. But who do I execute range queries like "where age > 40 and age < 50" , You have to create a Secondary index on the column age:
code :
update column family Users with column_metadata=[{column_name: age, validation_class: LongType, index_type: KEYS}];
get Users where age > 40 and age < 50 
Cassandra Modeling for filter and range queries

Cassandra Modeling for filter and range queries


By : Olajide1968 balloo19
Date : March 29 2020, 07:55 AM
this one helps. Just to reiterate the end of the conversation:
"Your understanding is correct and you are correct in stating that partition keys should be more unique than that. Each partition had a maximum size of 2GB but a practical limit is lower. In practice you would want your data partitioned into far smaller chunks that the table above. Given the ad-hoc nature of your queries in your example I do not think you would be able to practically do this by data modelling alone. I would suggest looking at using a Solr index on a table. This would allow you a robust search capability. If you use Datastax you are even able to query this via CQL"
Cassandra Range Queries

Cassandra Range Queries


By : Savitha
Date : March 29 2020, 07:55 AM
Hope that helps An article on time series data modelling in Cassandra:
http://rubyscale.com/2011/basic-time-series-with-cassandra/
Slow range queries in Cassandra

Slow range queries in Cassandra


By : Rafi Ahmed
Date : March 29 2020, 07:55 AM
help you fix your problem I see that your primary key consists of status, date and doc_id and you only use status as your partition key. That means that all the documents of the same status regardless of date will be put in the same partition. I guess that is a lot of information for one partition. Cassandra works well in partitions that are 100MB (or a couple of hundred MB in later versions) big, see here. Datastax D220 cource (it is free you just need to create an account) has a video that shows you how to calculate your partition size. You can post the results to your analysis so we can further help you. :)
EDIT: After the size analysis
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