From: | Graeme Gemmill <graeme(at)gemmill(dot)name> |
---|---|
To: | pgsql-sql(at)lists(dot)postgresql(dot)org |
Subject: | Passinf field name |
Date: | 2018-11-03 17:40:53 |
Message-ID: | 12a51f95-7c81-a63d-7327-460044459007@gemmill.name |
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Lists: | pgsql-sql |
Help please: Trying to construct a query where a field name has to be
passed.
Database wbdata has a field “date timestamp with timezone”.
cursor.execute("SELECT * FROM wbdata ORDER BY date;")
works.
cursor.execute("SELECT * FROM wbdata WHERE date > %s", (starttime,))
works.
I read in your FAQs that I have to use psycopg2.sql to pass a field name
into the query, so to select a subset of wbdata where date is >
startdate and the output is sorted by date, I tried
cursor.execute(
sql.SQL("SELECT * FROM wbdata ORDER BY %s WHERE date > %%s" %
[sql.Identifier("date")], [starttime]))
which gives me an error:
TypeError: __init__() takes 2 positional arguments but 3 were given
What is a correct formulation please?
Thank you
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