On Wed, 21 Jan 2009 08:26:13 -0800, jason kirtland
<j...@discorporate.us> wrote:
> Faheem Mitha wrote:
>>
>> Hi,
>>
>> I've got a query as follows:
>>
>> from sqlalchemy.sql import text
>>
>> gq = text("""
>> SELECT decode_genotype(cell.snpval_id, snp.allelea_id,
>> snp.alleleb_id) FROM cell JOIN snp ON snp.fid =
>> cell.snp_id WHERE cell.patient_chipid IN ('DUKE00001_plateA_A10.CEL',
>> 'DUKE00001_plateA_A11.CEL')
>> """)
>> I want to pass in the tuple as an argument, and was wondering how to do
>> it.
>>
>> So, I'm looking for something conceptually like
>>
>> gq = text("""
>> SELECT decode_genotype(cell.snpval_id, snp.allelea_id,
>> snp.alleleb_id) FROM cell JOIN snp ON snp.fid =
>> cell.snp_id WHERE cell.patient_chipid IN :plist
>> """)
>> gq = conn.execute(gq, plist="('DUKE00001_plateA_A10.CEL',
'DUKE00001_plateA_A11.CEL')")
>> Note, I want to pass in a tuple of arbitary length, so changing
>> this to pass two string arguments would not do. Perhaps I'm
>> supposed to pass in some bindparams too, but I don't know what type
>> I should be using.
> IN takes a list of scalars, each of which requires its own :bind
> parameter. On Postgresql you might find it more convenient to use
> ANY, which takes a single array argument. "WHERE
> cell.patient_chipid ANY (:plist)"
Thanks for the suggestion. Can such an array argument be passed in
from Python?
Regards, Faheem.
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