Re: PostgreSQL Bug with simple function unexpectedly treating varchar parameter as an array

There is really only one function with this name.  A rerun of my test script with the suggested change:

xxxx_pub_dev_2_db=# SELECT version();
                                                 version
---------------------------------------------------------------------------------------------------------
 PostgreSQL 16.9 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-26), 64-bit
(1 row)


xxxx_pub_dev_2_db=# SHOW server_version;
 server_version
----------------
 16.9
(1 row)


xxxx_pub_dev_2_db=# DROP FUNCTION if exists _sa_setup_role;
DROP FUNCTION
xxxx_pub_dev_2_db=# CREATE OR REPLACE FUNCTION _sa_setup_role( p_role_to_be_granted varchar)
xxxx_pub_dev_2_db-# RETURNS varchar
xxxx_pub_dev_2_db-# LANGUAGE plpgsql
xxxx_pub_dev_2_db-# AS
xxxx_pub_dev_2_db-# $function$
xxxx_pub_dev_2_db$# declare
xxxx_pub_dev_2_db$# begin
xxxx_pub_dev_2_db$# raise info '%',p_role_to_be_granted::varchar;
xxxx_pub_dev_2_db$#   return('Done');
xxxx_pub_dev_2_db$# end;
xxxx_pub_dev_2_db$# $function$;
CREATE FUNCTION
xxxx_pub_dev_2_db=# select _sa_setup_role('af_repo_app');
ERROR:  malformed array literal: "af_repo_app"
LINE 1: select _sa_setup_role('af_repo_app');
                              ^
DETAIL:  Array value must start with "{" or dimension information.
xxxx_pub_dev_2_db=# select _sa_setup_role('af_repo_app'::varchar);
INFO:  af_repo_app
 _sa_setup_role
----------------
 Done
(1 row)


xxxx_pub_dev_2_db=# \df *_sa_setup_role
                                      List of functions
 Schema |      Name      | Result data type  |          Argument data types           | Type
--------+----------------+-------------------+----------------------------------------+------
 sqlapp | _sa_setup_role | character varying | p_role_to_be_granted character varying | func
(1 row)


xxxx_pub_dev_2_db=#
xxxx_pub_dev_2_db=#