> Look at the "returns table (col1 type, col2 type)" form.
If I got this right "returns table" is not what I want as I need to select from my function as a virtual table in this case.
Yes, I mis-read your question. Your issue is placing the SRF (set returning function) in the select-list which causes it to be treated as a single composite-typed column. You need to place the function in after "FROM" or "LATERAL"
Something like:
SELECT * FROM src_tbl LATERAL my_func(src_tbl.col1, src_tbl.col2)
I haven't had much experience writing lateral clauses but their benefit is that they can reference columns from other tables so you don't have to place the function in the select-list.
