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https://issues.apache.org/jira/browse/CASSANDRA-9243?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sylvain Lebresne resolved CASSANDRA-9243.
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Resolution: Duplicate
> Literals should be valid selectors in SELECT statements
> -------------------------------------------------------
>
> Key: CASSANDRA-9243
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9243
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Michaël Figuière
> Priority: Minor
> Fix For: 3.x
>
>
> Literals are currently not acceptable selectors in {{SELECT}} statements:
> {noformat}
> <selector> ::= <identifier>
> | WRITETIME '(' <identifier> ')'
> | TTL '(' <identifier> ')'
> | <function> '(' (<selector> (',' <selector>)*)? ')'
> {noformat}
> This wasn't a big deal up to now as it wasn't very useful for users, but with
> UDFs being added in Cassandra 3.0, this means that literals aren't valid
> parameters of function. I believe it would actually be useful for several use
> cases:
> * To allow developers to test their own functions without having to set a
> value to a column to then pass it as an argument to the function.
> * To make it possible to write function that require a constant parameter
> such as {{pow(int, int) -> int}} or {{contains(set<text>, text) -> boolean}}.
> Additionally, this limitation is an inconsistency as literals are allowed in
> functions when used in {{INSERT}} statements.
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