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Sylvain Lebresne commented on CASSANDRA-11935:
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bq. I do not think that there is a conflict with the prefered type here.
There is a conflict in principle in the sense that if you have {{d = 3 + 4}}
where {{d}} is a {{bigint}}, then the new rule would lead you to pick {{bigint
add(bigint, bigint)}} while the prefered type suggests {{bigint add(int,
int)}}. Don't get me wrong, both choice happens to be fine and the code pick a
choice. It's more of a general remark that having intersecting and pretty
special rules doesn't give me the feel of a clean and well understood type
system, which give me slight concerns that some of those rules may prove
annoying in future developments.
But I suppose it's not a terribly precise comment, it doesn't seem we're going
anywhere, and as I don't a concrete issue with the current patch, +1.
> Add support for arithmetic operators
> ------------------------------------
>
> Key: CASSANDRA-11935
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11935
> Project: Cassandra
> Issue Type: Sub-task
> Components: CQL
> Reporter: Benjamin Lerer
> Assignee: Benjamin Lerer
> Fix For: 3.x
>
>
> The goal of this ticket is to add support for arithmetic operators:
> * {{-}}: Change the sign of the argument
> * {{+}}: Addition operator
> * {{-}}: Minus operator
> * {{*}}: Multiplication operator
> * {{/}}: Division operator
> * {{%}}: Modulo operator
> This ticket we should focus on adding operator only for numeric types to keep
> the scope as small as possible. Dates and string operations will be adressed
> in follow up tickets.
> The operation precedence should be:
> # {{*}}, {{/}}, {{%}}
> # {{+}}, {{-}}
> Some implicit data conversion should be performed when operations are
> performed on different types (e.g. double + int).
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