Subject: Re: Adaptation in psycopg3
To: listas <listas@soft-com.es>, Daniele Varrazzo
 <daniele.varrazzo@gmail.com>, psycopg@postgresql.org
References: 
 <CA+mi_8ZYBu5V1hcKvsnMqgKayGvyMRJAMdMQVXvZ02QXsnt9yA@mail.gmail.com>
 <7ec5da30-9d28-2bab-7eaa-7038711a99f0@soft-com.es>
From: Adrian Klaver <adrian.klaver@aklaver.com>
Message-ID: <7d110c22-f645-0dc4-1d98-3f8c40604c9e@aklaver.com>
Date: Wed, 25 Nov 2020 06:35:21 -0800
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On 11/25/20 4:29 AM, listas wrote:
> El 24/11/20 a las 17:52, Daniele Varrazzo escribió:
>> Hello,
>>
>> I wrote a description of the psycopg3 adaptation system and the main
>> differences compared to psycopg2: available at
>> https://www.psycopg.org/articles/2020/11/24/psycopg3-adaptation/
>>
>> Initial API docs are available at
>> https://www.psycopg.org/psycopg3/docs/adaptation.html
>>
>> Feedback is welcome. Cheers!
>>
>> -- Daniele
>>
> 
> Hi Daniele, thanks for your effort.
> 
> After reading the docs i have a question about the parameters in the 
> 'in' clause.
> 
> In psycopg2 i do:
> 
>   params = (1,2,3,4)
>   cursor.execute("select * from mytable where field1 in %s", (params,))
> 
> or
> 
>   params = ('black','red','green')
>   cursor.execute("select * from mytable where field2 in %s", (params,))
> 
> What will it be like in psycopg3, will it be the same?, will I have to 
> create a special adapter?

 From the link:

"cannot use the IN (...) construct:

# Must use "AND nation = any (%s)"
cur.execute("... AND nation in %s", [("IT", "FR", "DE")])

"

> 
> Thanks
> -- 
> Oswaldo Hernández
> 
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com