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Do you have to be cassandra compliant to query cassandra?


Asked by Colette Bryan on Nov 30, 2021 Cassandra



Note that all query clauses must be Cassandra compliant. You cannot, for example, use $in operator for a key which is not part of the primary key. Querying in Cassandra is very basic but could be confusing at first. Take a look at this post and, obvsiouly, at the cql query documentation
Next,
CQL does not support Union, Intersection queries. Table columns cannot be filtered without creating the index. Greater than (>) and less than (<) query is only supported on clustering column. Cassandra query language is not suitable for analytics purposes because it has so many limitations.
In addition, Regardless of sensor types, Cassandra handles the flow of incoming data nicely and provides possibilities for further data analysis. Messaging systems (chats, collaboration and instant messaging apps, etc.) are just as perfect for Cassandra as sensor data, since they don’t require data updates.
One may also ask,
You can create join queries on Cassandra data outside of Spark by using DataStax’s free ODBC driver (we also supply an ODBC driver for Spark). This means that any developer/DBA/BI/ETL tool that has ODBC connectivity can connect to and query data in Cassandra.
Subsequently,
However, Cassandra data format differs from what you got used to in the SQL world. There are tables with special keys but without relations. What is the most important, it is not possible to query data using any arbitrary column. Cassandra is not perfect for every project, there are many mistakes which can be made when working with it.