Re: insert DEFAULT value

On 3/3/21 1:51 PM, Hans Ginzel wrote:
> How to insert DEFAULT value, please?
>
> import psycopg2
> from psycopg2.sql import DEFAULT    #
> https://www.postgresql-archive.org/Inserting-default-values-into-execute-values-td6130148.html
>
>
> db = psycopg2.connect(host='host', dbname='db')
> cursor = db.cursor()
> cursor.execute("DROP TABLE IF EXISTS test_default")
> cursor.execute("CREATE TABLE test_default(i int NOT NULL DEFAULT 1)")
> cursor.execute("INSERT INTO test_default VALUES (%s)", (DEFAULT,))
>
> cursor.execute("DROP TABLE IF EXISTS test_default")
> cursor.execute("CREATE TABLE test_default(j jsonb NOT NULL DEFAULT
> '{}'::jsonb)")
> cursor.execute("INSERT INTO test_default VALUES (%s)", (DEFAULT,))
>
> For both cases I get
> psycopg2.ProgrammingError: can't adapt type 'SQL'

You need to do something like:

cur.execute(sql.SQL("INSERT INTO test_default VALUES ({})").format(DEFAULT))

>
> Thank you in advance,
> HG
>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com