node-postgres does not show result set for stored procedure - postgresql

Question

I'm trying to use a stored procedure to create a character. The procedure does some validation to make sure that the params are valid before inserting them into the database(let's keep this validation on the database). However when I attempt to use the procedure in my web interface with invalid data, there is no result set, and the error promise does not happen. What do I have to do to make this procedure cause an error on the node side?
-- add a character with the universe performing the universe name lookup
CREATE OR REPLACE FUNCTION add_character(
IN p_chr_name VARCHAR(255),
IN p_unv_name VARCHAR(255),
IN p_chr_bio TEXT
)
RETURNS INT AS $$
DECLARE
unv_id INTEGER := (SELECT unv_id
FROM universes
WHERE LOWER(unv_name) = LOWER(p_unv_name));
new_id INTEGER := NULL;
BEGIN
IF unv_id IS NULL THEN
RAISE EXCEPTION 'unv_id is null for %', p_unv_name;
END IF;
INSERT INTO characters(chr_name, chr_unv_id, chr_bio) VALUES
(p_chr_name, unv_id, p_chr_bio)
RETURNING chr_id INTO new_id;
RETURN new_id;
END $$
LANGUAGE PLPGSQL;
The javascript
app.post('/contrib/chr', (req, res) => {
console.log(req.body);
pool.query('SELECT add_character($1, $2, $3)'
[req.body.chr_name, req.body.unv_name, req.body.chr_bio])
.then((rows) => {
console.log(rows);
res.render('contrib');
}).catch((err) => {
console.error('contrib-chr-err', err);
res.render('contrib');
});
})
The row object returned.
{ command: '', rowCount: NaN, rows: [], fields: null }

Answer 1

working sample:
sql:
t=# create or replace function s110(_b boolean) returns int as
$$
begin
if not _b then
raise info '%','here is notice';
raise warning '%','warning it is';
end if;
if _b then
raise exception '%','final exception it is';
end if;
return 9;
end;
$$ language plpgsql;
CREATE FUNCTION
js
var pg = require('pg');
var client = new pg.Client({"database": "t"});
client.connect(function (err) {
if (err) throw err;
client.query('SELECT * from s110(true)', [], function (err, result) {
if (err) throw err;
console.log(result);
client.end(function (err) {
if (err) throw err;
});
});
});
run
MacBook-Air:n vao$ vi q1.js && node q1.js
/Users/vao/n/q1.js:6
if (err) throw err;
^
error: final exception it is
at Connection.parseE (/Users/vao/node_modules/pg/lib/connection.js:569:11)
at Connection.parseMessage (/Users/vao/node_modules/pg/lib/connection.js:396:17)
at Socket.<anonymous> (/Users/vao/node_modules/pg/lib/connection.js:132:22)
at emitOne (events.js:77:13)
at Socket.emit (events.js:169:7)
at readableAddChunk (_stream_readable.js:153:18)
at Socket.Readable.push (_stream_readable.js:111:10)
at TCP.onread (net.js:531:20)
if I change SELECT * from s110(true) to SELECT * from s110(false):
MacBook-Air:n vao$ vi q1.js && node q1.js
{ command: 'SELECT',
rowCount: 1,
oid: NaN,
rows: [ { s110: 9 } ],
fields:
[ { name: 's110',
tableID: 0,
columnID: 0,
dataTypeID: 23,
dataTypeSize: 4,
dataTypeModifier: -1,
format: 'text' } ],
_parsers: [ [Function] ],
RowCtor: [Function],
rowAsArray: false,
_getTypeParser: [Function: bound ] }
UPDATE
Also you can get STDOUT messages with little change. I'm not good in javascript, hopefully I don't advice very silly things, here. If you add this line above .query:
client.connection.on('message', function(a) {console.log(a);});
client.query('SELECT s110(false)', [], function (err, result) {...
You will get all RAISE output to console.log:
{ [notice: here is notice]
name: 'notice',
length: 123,
severity: 'INFO',
code: '00000',
detail: undefined,
hint: undefined,
position: undefined,
internalPosition: undefined,
internalQuery: undefined,
where: 'PL/pgSQL function s110(boolean) line 4 at RAISE',
schema: undefined,
table: undefined,
column: undefined,
dataType: undefined,
constraint: undefined,
file: 'pl_exec.c',
line: '3165',
routine: 'exec_stmt_raise' }
{ [notice: warning it is]
name: 'notice',
length: 128,
severity: 'WARNING',
code: '01000',
detail: undefined,
hint: undefined,
position: undefined,
internalPosition: undefined,
internalQuery: undefined,
where: 'PL/pgSQL function s110(boolean) line 5 at RAISE',
schema: undefined,
table: undefined,
column: undefined,
dataType: undefined,
constraint: undefined,
file: 'pl_exec.c',
line: '3165',
routine: 'exec_stmt_raise' }
{ name: 'dataRow', length: 11, fieldCount: 1, fields: [ '9' ] }
{ name: 'commandComplete', length: 13, text: 'SELECT 1' }
{ name: 'readyForQuery', length: 5, status: 'I' }