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Posted to commits@cassandra.apache.org by "C. Scott Andreas (JIRA)" <ji...@apache.org> on 2018/11/19 05:46:02 UTC

[jira] [Updated] (CASSANDRA-9550) Support fixed precision data type

     [ https://issues.apache.org/jira/browse/CASSANDRA-9550?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

C. Scott Andreas updated CASSANDRA-9550:
----------------------------------------
    Component/s: CQL

> Support fixed precision data type
> ---------------------------------
>
>                 Key: CASSANDRA-9550
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9550
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: CQL
>            Reporter:  Brian Hess
>            Priority: Major
>
> SQL databases support a fixed precision data type.  When converting data models from SQL DBs to Cassandra, the choices are not clear.  DOUBLE or FLOAT are possibilities, but with UDFs and Aggregates this is actually a lot less clear, as you really do need fixed precision arithmetic.  That is, one flaw with floating-point math is that the order of the operations can change the final result.  That is not an issue with fixed precision arithmetic (though other trade-offs are there).



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