cursor.execute("""
SELECT titem.object_id, titem.tag_id
FROM tagging_taggeditem titem
WHERE titem.object_id IN (%s)
""" % ','.join([str(x) for x in [1,5,9]])
On Fri, Sep 26, 2008 at 6:23 AM, Tino Wildenhain <[EMAIL PROTECTED]> wrote:
> Hi,
>
> Bruno Desthuilliers wrote:
>
>> bcurtu a écrit :
>>
>>> Hi,
>>>
>>> I have a BIIIIIG problem with the next query:
>>>
>>> cursor.execute("""
>>> SELECT titem.object_id, titem.tag_id
>>> FROM tagging_taggeditem titem
>>> WHERE titem.object_id IN (%s)
>>> """,( eid_list))
>>>
>>> eid_list is suppossed to be a list of ids = [1,5,9]
>>>
>>> How can I make it work?
>>>
>>
>> You have to build your sql statement in three stages:
>>
>> # stage 0: the template
>> sql_template = """
>> SELECT titem.object_id, titem.tag_id
>> FROM tagging_taggeditem titem
>> WHERE titem.object_id IN (%s)
>> """
>>
>> # stage 1: build correct place_holders string for the actual number
>> # of items in eid_list
>> place_holders = ", " .join("%s" for x in xrange(len(eid_list)))
>>
>
> Hm. either ", ".join(["%s"]*len(eid_list))
> or ", ".join("%s" for x in eid_list)
>
> should produce the same, wouldn't it? :-)
>
> # stage 2 : build the effective sql statement
>> sql = sql_template % place_holders
>>
>> # ok, let's go:
>> cursor.execute(sql_template, eid_list)
>>
>>
>> NB : you can of course make it in a single statement, but readability will
>> suffer:
>>
>> cursor.execute(
>> """
>> SELECT titem.object_id, titem.tag_id
>> FROM tagging_taggeditem titem
>> WHERE titem.object_id IN (%s)
>> """ % ", " .join("%s" for x in xrange(len(eid_list))),
>> eid_list
>> )
>>
>
> I'd think giving the arguments in a form of an array type should
> work too. At least in postgres there are references to do so.
>
> Regards
> Tino
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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