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https://issues.apache.org/jira/browse/CASSANDRA-9228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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C. Scott Andreas updated CASSANDRA-9228:
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Component/s: Documentation and Website
> Add documentation for Type Cast, Type Conversion and Function Overloading
> -------------------------------------------------------------------------
>
> Key: CASSANDRA-9228
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9228
> Project: Cassandra
> Issue Type: Task
> Components: Documentation and Website
> Reporter: Michaël Figuière
> Priority: Minor
>
> While digging around UDF overloading and type conversion it appeared that
> several topics aren't currently documented in the CQL spec:
> * Explicit type casting has been added with CASSANDRA-5226 in Cassandra 1.2.2
> and is currently not explained in the spec.
> * UDFs support overloading, this should be explained in the CQL spec, along
> with a clear definition of what is considered as an ambiguous function call.
> * In this context it also becomes important to document the type conversion
> rules, that is, which type A can be converted to which type B without raising
> an error.
> * Not directly related but it would also be useful to document the column
> type changes that are allowed in {{ALTER TABLE}} statements.
> All these fairly important topics are currently not obvious or hard to figure
> out for the user.
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