Michaël Figuière created CASSANDRA-9243:
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Summary: 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
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}}.
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