Question

I have this function to be created, but the variable view_sizeis being treated as a column.

I’m getting an error saying that column view_size don't exists.

Why?

If I change the context, it works (example: only do a query, is treated like a variable).

CREATE OR REPLACE FUNCTION create_view(view_size INTEGER) RETURNS VOID  
AS $$
BEGIN
    CREATE VIEW token_relation
    AS
    SELECT * FROM textblockhastoken     
    ORDER BY textblockid, sentence, position
    LIMIT view_size;
END
$$
LANGUAGE plpgsql;

Answer 1

Try this instead:

CREATE OR REPLACE FUNCTION create_view(view_size INTEGER) RETURNS VOID  
AS $$
BEGIN
    EXECUTE 'CREATE VIEW token_relation 
    AS 
    SELECT * FROM textblockhastoken 
    ORDER BY textblockid, sentence, position 
    LIMIT ' || view_size;
END
$$
LANGUAGE plpgsql;