inconsistent types deduced

[aeon3k]

Describe the bug
I try to use twice the $4 argument but it doesn't work in this specific case

`
INSERT INTO public.users (username, email, provider, client_uid, client_id)
VALUES ($1, $2, $3, $4, (select public.clients.id from public.clients where public.clients.uid = $4 limit 1))
RETURNING id, uid`

err := r.pool.QueryRow(context.Background(), q, username, email, "own", "7Rp9WhF3PdrkhY1uZbXj8").Scan(&RetID, &RetUID)

In the DB schema public.clients.uid and client_uid are of the same type : character varying

Expected behavior
I expect to have the same type inference both times (varchar I presume)

Actual behavior
ERROR: inconsistent types deduced for parameter $4 at character 119 (SQLSTATE 42P08)
DETAIL: text versus character varying

Version
PostgreSQL 14.15 (Postgres.app) on aarch64-apple-darwin20.6.0, compiled by Apple clang version 12.0.5 (clang-1205.0.22.9), 64-bit
github.com/jackc/pgx/v5 v5.7.2
go version go1.23.3 darwin/amd64

Additional context

I've tried with a prepared statement in PG Admin and the same query works fine.

I found 2 solutions :

• If I use WHERE uid = $5 LIMIT 1)) it works fine (I double the same argument)
• If I use WHERE uid = $4::varchar LIMIT 1)) it works fine

In another similar insert query where I use twice the same $ argument it works fine. In this case it's an int64 (bigint in DB).

Thanks in advance for your help.
Cheers

[jackc]

I've tried with a prepared statement in PG Admin and the same query works fine.

I'm not sure what PgAdmin does, but can you try it directly in psql?

e.g.

prepare s as insert into ...

That's basically all pgx is doing.