Andre' John wrote:
> Hi
>
> I am trying to do this for a Postgresql database:
>
> conn = psycopg2.connect('host=localhost')
> cur = conn.cursor()
> cur.execute("SELECT * FROM names WHERE name=%s", ['S'])
>
> , which doesn't work, and neither does
>
> cur.execute("SELECT * FROM names WHERE name='%s'", ['S'])
>
> or
>
> cur.execute("SELECT * FROM names WHERE name='S'")
>
> work.
I'm more inclined to believe the first two than the third, but I suppose
if you are telling the truth (House: "Patients always lie") then I am
guessing you have defined your table's "names" columns to be an array type.
I haven't worked with those (since they don't confirm to the strict
relational model I prefer to work with), but I am guessing you might try
cur.execute("SELECT * FROM names WHERE name='%s'", (['S'], ))
as this provides the necessary tuple as the second argument to execute,
and the on;y element of the tuple is a list of a single element.
> It always returns:
>
> Traceback (most recent call last):
>
> File "<stdin>", line 1, in <module>
>
> psycopg2.ProgrammingError: array value must start with ?{½ or
> dimension information
>
>
> Though, when doing
>
> cur.execute("SELECT * FROM names")
>
> it works.
> I am totally helpless here. Does anyone have an idea?
>
If my suggestion doesn't work, you should probably let us know more
about the structure of your table.
regards
Steve
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