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https://issues.apache.org/jira/browse/CASSANDRA-10783?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15314193#comment-15314193
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Brian Hess commented on CASSANDRA-10783:
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[~slebresne] - okay, but let's open that ticket, then.
With respect to function resolution with literals (or non-literals, for that
matter), the topic of function overloading that you point to (with your Add
example), Postgres has some guidance on what can/should be done. It would be
better to match *something* than to create something completely different.
> Allow literal value as parameter of UDF & UDA
> ---------------------------------------------
>
> Key: CASSANDRA-10783
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10783
> Project: Cassandra
> Issue Type: Improvement
> Components: CQL
> Reporter: DOAN DuyHai
> Assignee: Robert Stupp
> Priority: Minor
> Labels: CQL3, UDF, client-impacting, doc-impacting
> Fix For: 3.x
>
>
> I have defined the following UDF
> {code:sql}
> CREATE OR REPLACE FUNCTION maxOf(current int, testValue int) RETURNS NULL ON
> NULL INPUT
> RETURNS int
> LANGUAGE java
> AS 'return Math.max(current,testValue);'
> CREATE TABLE maxValue(id int primary key, val int);
> INSERT INTO maxValue(id, val) VALUES(1, 100);
> SELECT maxOf(val, 101) FROM maxValue WHERE id=1;
> {code}
> I got the following error message:
> {code}
> SyntaxException: <ErrorMessage code=2000 [Syntax error in CQL query]
> message="line 1:19 no viable alternative at input '101' (SELECT maxOf(val1,
> [101]...)">
> {code}
> It would be nice to allow literal value as parameter of UDF and UDA too.
> I was thinking about an use-case for an UDA groupBy() function where the end
> user can *inject* at runtime a literal value to select which aggregation he
> want to display, something similar to GROUP BY ... HAVING <filter clause>
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