Re: Insert with a lot of columns

On Dec 31, 2013, at 10:50 AM, Adrian Klaver <adrian.klaver@gmail.com> wrote:

> On 12/31/2013 10:35 AM, David Kerr wrote:
>> Howdy all
>>
>> I’m a bit of a python noob so bear with me if this is obvious but i’m
>> trying to insert into a table with a lot of columns (486 columns)
>>
>> so far i’ve got
>>
>> query_string = “””
>> INSERT INTO TABLE ( <stuff> )
>> VALUES (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,  ...
>
>>
>> Now, the good news is that i have a RealDictCursor with all the data in it that i want to insert (in the right
order)
>
> First to use a dictionary to supply parameters you need to use the named format( %(name)s ) for the placeholders. So
theabove is not going to work. See here for more detail: 
>
> http://initd.org/psycopg/docs/usage.html#passing-parameters-to-sql-queries

ah, i had saw that but wasn’t sure if i’d run into the same 255 limit. I’ll give it a shot. thanks.

>
> This would seem to be a case where using INSERT INTO SELECT * FROM might work better:
>
> http://www.postgresql.org/docs/9.3/interactive/sql-insert.html
>

Yeah, that was how i started, and I may go back to it.