Supabase SQL Database Functions and Parameters - sql

Question

In my supabase database, I have a list of words along with their uuids in the form of
uuid
word
unique_chars
found_count
x1
apple
4
0
y2
banana
3
0
I want to return all words, which contain a specific letter – say "E" (called "main char") – from the table. Therefore, I tried using an SQL Database Function like this:
create or replace function get_possible_words()
returns setof dict
language sql
as $$
select *
from dict
where word ilike (%e%)
$$;
which works perfectly fine and would return "apple".
However, when trying to pass the letter "E" ("main char") as a parameter, it is not working anymore, whatever I try:
## Get Results (Supabase)
curl -X "POST" "https://abc.supabase.co/rest/v1/rpc/get_possible_words" \
-H 'apikey: key' \
-H 'Content-Type: application/json; charset=utf-8' \
-d $'{
"mainchar": "E"
}'
together with a slightly altered version of the function
create or replace function get_possible_words(mainchar text)
returns setof dict
language sql
as $$
select *
from dict
where word like (mainchar)
$$;
does not work. Another attempt was
drop function if exists test_query;
create function test_query (parameter text)
RETURNS TABLE(uuid uuid, word text) AS
$$
BEGIN
return query SELECT uuid, word FROM "dict"
INNER JOIN "word" ON "dict".column = "word".column
WHERE "word".column = parameter;
END;
$$
language plpgsql volatile;
which did not work as well ("relation "word" does not exist"). Could someone please help me out with the syntax? Thanks a lot and all the best from Germany!

Answer 1

Would this do it?
create or replace function get_possible_words(mainchar text)
returns setof dict
language sql
as $$
select *
from dict
where word ilike (mainchar)
$$;
curl -X "POST" "https://abc.supabase.co/rest/v1/rpc/get_possible_words" \
-H 'apikey: key' \
-H 'Content-Type: application/json; charset=utf-8' \
-d $'{
"mainchar": "%e%"
}'