public inbox for [email protected]  

help / color / mirror / Atom feed

From: Laurenz Albe <[email protected]>
To: Igor Korot <[email protected]>
To: pgsql-generallists.postgresql.org <[email protected]>
Subject: Re: libpq simple SELECT
Date: Wed, 17 Dec 2025 08:34:51 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <CA+FnnTzP_9Mh9S7NJL5WFJmbOi2wxw4g=MdoUo-SuXEp3Fyg-g@mail.gmail.com>
References: <CA+FnnTzP_9Mh9S7NJL5WFJmbOi2wxw4g=MdoUo-SuXEp3Fyg-g@mail.gmail.com>

On Tue, 2025-12-16 at 21:49 -0800, Igor Korot wrote:
> I just tried the following code:
> 
> [code]
>     std::wstring query1 = L"SELECT t.table_catalog AS catalog,
> t.table_schema AS schema, t.table_name AS table, u.usename AS owner,
> c.oid AS table_id FROM information_schema.tables t,
> pg_catalog.pg_class c, pg_catalog.pg_user u WHERE t.table_name =
> c.relname AND c.relowner = usesysid AND (t.table_type = 'BASE TABLE'
> OR t.table_type = 'VIEW' OR t.table_type = 'LOCAL TEMPORARY') ORDER BY
> table_name;";
>         res = PQexec( m_db, m_pimpl->m_myconv.to_bytes( query1.c_str()
> ).c_str() );
>          for( int i = 0; i < PQntuples( res ); i++ )
>          {
> some code handling the results
>          }
> [/code]
> 
> The loop is executed exactly 1 time.
> 
> My question is - according to the comment above I don't have to use cursor,
> but it looks like it's unavoidable?

I see no cursor in your example...

Yours,
Laurenz Albe

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected]
  Subject: Re: libpq simple SELECT
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox