After the update, when a saved question has parameters and we are using that in question by {{ #Qnumber }}. Metabase throws error stating “missing required parameters”. but how do we specify them ??
Example:
My saved question is 213 and it has a date parameter “from_date”.
When i use Q-213 to create new question,
select * from ({{ #213 }}) as x
The above query will throw below error.
missing required parameters: #{“from_date”}
Hi @Karthik_V_V
It’s currently not possible to set the parameters of a sub-question. It’s the same problem as Saved Questions. I think this is the issue:
https://github.com/metabase/metabase/issues/6449 - upvote by clicking 
on the first post
The docs are a bit misleading then, because the example given specifically uses parameters in the saved question:
SELECT count(*) FROM products WHERE True [[AND {{id}}]] [[AND {{category}}]]
No?
@dave_1 The documentation for sub-queries (the new feature since 0.35), does not show that example:
https://www.metabase.com/docs/latest/users-guide/13-sql-parameters.html#using-an-existing-question-as-a-sub-query
That documentation page contains many different examples for multiple types and different databases.
Parameters are one of the most advanced functions of Metabase - and something that is easily misunderstood - so we’re working on rewriting it completely.
