Postgres mistakes parameter for column - postgresql

Question

I am new to Postgres DBs, and I am trying to write a function (like a stored procedure) to all inserting a user into my database. I know I must be missing something obvious, but I keep getting an error in the code shown where Postgres says { error: column "p_organizationsid" does not exist }. This is the snippet of code that appears to be causing the problem.
CREATE OR REPLACE FUNCTION userupsertget(
p_id uuid,
p_username character varying,
p_organizationid uuid,
p_organizationsid character varying,
p_lastname character varying,
p_firstname character varying,
p_middleinitial character varying,
p_emailaddress character varying,
p_sid character varying,
p_languageid integer,
p_forcepasswordreset bit,
p_salt character varying,
p_hash character varying,
p_statusid uuid,
p_createdby uuid,
p_modifiedby uuid,
p_lastsessionuguid uuid,
p_roleids uuid[],
p_applicationid uuid)
RETURNS SETOF users
LANGUAGE 'plpgsql'
COST 100
VOLATILE
ROWS 1000
AS $BODY$
BEGIN
DO
$do$
DECLARE establishedOrgID uuid;
BEGIN
SELECT org.id FROM organization AS org
WHERE org.sid = p_organizationsid
OR org.id = p_organizationid;
IF EXISTS (SELECT 1 FROM users WHERE id = p_id) THEN
--update statement;
UPDATE users
SET username = p_username,
lastname = p_lastname,
firstname = p_firstname,
middleinitial = p_middleinitial,
emailaddress = p_emailaddress,
sid = p_sid,
languageid = p_languageid,
forcepasswordreset = p_forcepasswordreset,
statusid = p_statusid,
datemodified = current_timestamp,
createdby = p_createdby,
modifiedby = p_modifiedby,
lastsessionguid = p_lastsessionguid
WHERE id = p_id;
IF EXISTS (SELECT 1 FROM users WHERE id = p_id AND statusid <> p_statuid) THEN
UPDATE users SET statusid = p_statusid, datestatusmodified = current_timestamp WHERE id = p_id;
END IF;
ELSE
INSERT INTO users (id, organizationid, username, lastname, firstname, middleinitial,
emailaddress, sid, languageid, forcepasswordreset, statusid, datecreated,
datemodified, createdby, modifiedby, lastsessionguid)
SELECT p_id, establishedOrgID, p_username, p_lastname, p_firstname, p_middleinitial, p_emailaddress, p_sid,
p_languageid, p_forcepasswordreset, p_statusid, current_timestamp, current_timestamp,
p_createdby, p_modifiedby, p_lastsessionuguid
FROM users
WHERE id = p_id;
-- DECLARE newid uuid := LASTVAL();
INSERT INTO users (id, userid, roleid, applicationid, startdate, enddate, createdby, modifiedBy)
SELECT LASTVAL(), roleid, p_applicationid, current_timestamp, current_timestamp, p_createdby, p_modifiedby
FROM UNNEST (p_roleids) AS roleids;
END IF;
END
$do$;
RETURN QUERY
SELECT usr.*, org.uselogin
FROM users AS usr
INNER JOIN organization AS org On org.id = usr.organizationid
WHERE id = p_id;
END;
$BODY$;

Answer 1

As you can see in the PostgreSQL documentation about Creating a function: https://www.postgresql.org/docs/9.1/sql-createfunction.html
you should get better luck if you replace your parameter's name by $n where n is the number of the function parameter:
CREATE FUNCTION add(integer, integer) RETURNS integer
AS 'select $1 + $2;'
LANGUAGE SQL
IMMUTABLE
RETURNS NULL ON NULL INPUT;
or...
CREATE FUNCTION check_password(uname TEXT, pass TEXT)
RETURNS BOOLEAN AS $$
DECLARE passed BOOLEAN;
BEGIN
SELECT (pwd = $2) INTO passed
FROM pwds
WHERE username = $1;
RETURN passed;
END;
$$ LANGUAGE plpgsql
SECURITY DEFINER
-- Set a secure search_path: trusted schema(s), then 'pg_temp'.
SET search_path = admin, pg_temp;
Now, if you wish to continue using parameter names, you should declare them as alias:
CREATE or REPLACE FUNCTION data_ctl(opcao char, fdata date, fhora time) RETURNS char(10) AS $$
DECLARE
opcao ALIAS FOR $1;
vdata ALIAS FOR $2;
vhora ALIAS FOR $3;
retorno char(10);
BEGIN
IF opcao = 'I' THEN
insert into datas (data, hora) values (vdata, vhora);
retorno := 'INSERT';
END IF;
IF opcao = 'U' THEN
update datas set data = vdata, hora = vhora where data='1995-11-01';
retorno := 'UPDATE';
END IF;
IF opcao = 'D' THEN
delete from datas where data = vdata;
retorno := 'DELETE';
ELSE
retorno := 'NENHUMA';
END IF;
RETURN retorno;
END;
$$
LANGUAGE plpgsql;
--select data_ctl('I','1996-11-01', '08:15');
select data_ctl('U','1997-11-01','06:36');
select data_ctl('U','1997-11-01','06:36');