EXECUTE INSERT BUGS?

create table test (col text);
create or replace function tester() RETURNS void AS $$
DECLARE
    cmd text;
    v_value text := null;
                 -- ^^^ right here, NULL makes the querystring fail by setting cmd =
null
BEGIN
cmd := 'INSERT INTO test (
                col
        ) values ( '
                || quote_literal(v_value) ||  ');';
EXECUTE cmd;

END;
$$   LANGUAGE plpgsql;


test=# \i /tmp/test
CREATE TABLE
CREATE FUNCTION
test=# select * from tester();
ERROR:  cannot EXECUTE a null querystring
CONTEXT:  PL/pgSQL function "tester" line 12 at execute statement


Also, if v_value is set to boolean then quote_literal(v_value) throws error



 
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