Add switch expression syntax #586

Activity

1. antonmedv

   added

   feature

   research

   on Feb 29, 2024
2. vmihailenco commented on Aug 10, 2024

   

   vmihailenco

   on Aug 10, 2024

   More actions

   I have nothing against having a switch statement, but ClickHouse also has multiIf function with short-circuit-function-evaluation. It is often more readable than a switch and addresses your concerns about "evaluate all conditions and cases before choosing a correct one".
3. antonmedv commented on Aug 10, 2024

   

   antonmedv

   on Aug 10, 2024

   MemberAuthor

   More actions

   While switch statement is easy to understand and implement, maybe we need to consider adding "match" expression instead.

   Or to make expr closer to golang and implement switch in the exact same semantics.
4. vmihailenco commented on Aug 10, 2024

   

   vmihailenco

   on Aug 10, 2024

   More actions

   Or to make expr closer to golang and implement switch in the exact same semantics.

   I very much would like to see multi-line expressions happen, so it would make sense to have switches to be an expression as well, e.g. in Ruby:

   case x
   when 1..5
     "It's between 1 and 5"
   when 6
     "It's 6"
   when "foo", "bar"
     "It's either foo or bar"
   else
     "You gave me #{x} -- I have no idea what to do with that."
   end
   

   The key point is that it evaluates to an expression. The syntax does not matter.
5. antonmedv commented on Aug 10, 2024

   

   antonmedv

   on Aug 10, 2024

   MemberAuthor

   More actions

   I see. This makes sense. 👍🏻

   👍React with 👍1Reacted by axshor
6. tinboxw commented on Feb 8, 2025

   

   tinboxw

   on Feb 8, 2025

   More actions

   When can it be achieved approximately?