How to JOIN a table and selectable stored procedure?

It's simple, the selectable stored procedure works as any table.

select t1.id, sp1.field1
from t1
join sp1(parameters) on t1.id = sp1.id;

It you wish, you can also use fields from the table as input values into stored procedure. It that case, make sure you use LEFT JOIN to force table fields to be evaluated first (so they are available to stored procedure):

select t1.id, sp1.field1
from t1
left join sp1(t1.id) on 1=1;

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