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Filter with a list of tuple #550

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Andarius opened this issue Apr 2, 2020 · 3 comments
Closed

Filter with a list of tuple #550

Andarius opened this issue Apr 2, 2020 · 3 comments

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@Andarius
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@Andarius Andarius commented Apr 2, 2020

  • asyncpg version: 0.20.1
  • PostgreSQL version: 12-alpine
  • Do you use a PostgreSQL SaaS? If so, which? Can you reproduce
    the issue with a local PostgreSQL install?    : no
  • Python version: 3.8
  • Platform: Kde
  • Do you use pgbouncer?: no
  • Did you install asyncpg with pip?: no
  • If you built asyncpg locally, which version of Cython did you use?: -
  • Can the issue be reproduced under both asyncio and
    uvloop?    :

I'm trying to fetch records based on a list of tuple but I keep getting:
asyncpg.exceptions._base.InternalClientError: could not resolve query result and/or argument types in 6 attempt

Here is the request:

SELECT id from my_table where (label, user_id)::record = any($1::record[]) (where $1 is a list of tuple)
@elprans
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@elprans elprans commented Apr 2, 2020

Postgres does not support input of anonymous tuple types. That said, asyncpg should handle this better.
@Andarius
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@Andarius Andarius commented Apr 3, 2020

So, what would be the equivalent of SELECT * FROM my_table WHERE (label, user_id) IN (('T', 1), ('R', 2), ('T', 3)) ?
@Andarius Andarius changed the title Searching given a list of tuple Filter with a list of tuple Apr 3, 2020
@elprans
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@elprans elprans commented Apr 23, 2020

If you can afford it, create an explicit composite type:

CREATE TYPE label_id_pair AS (label text, id int)

and then

SELECT id from my_table where (label, user_id)::record = any($1::label_id_pair[])
@Andarius Andarius closed this Jun 26, 2020
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@elprans @Andarius
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