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Subject: Re: mysql solution
From: Ferrous Cranus <nikos.gr33k@gmail.com>
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Xref: csiph.com comp.lang.python:37578

=CE=A4=CE=B7 =CE=A0=CE=AD=CE=BC=CF=80=CF=84=CE=B7, 24 =CE=99=CE=B1=CE=BD=CE=
=BF=CF=85=CE=B1=CF=81=CE=AF=CE=BF=CF=85 2013 1:25:20 =CE=BC.=CE=BC. UTC+2, =
=CE=BF =CF=87=CF=81=CE=AE=CF=83=CF=84=CE=B7=CF=82 Lele Gaifax =CE=AD=CE=B3=
=CF=81=CE=B1=CF=88=CE=B5:
> Ferrous Cranus <nikos.gr33k@gmail.com> writes:
>=20
>=20
>=20
> > I;am now convinced the hash solution isn't reversible and also isn't
>=20
> > unique.
>=20
>=20
>=20
> Great!
>=20
>=20
>=20
> > how is the mysql statement is going to find the 'pin' to update the
>=20
> > specific record.
>=20
>=20
>=20
> The simplest way is to execute a SELECT just after the insertion, doing
>=20
> a
>=20
>=20
>=20
>   SELECT pin FROM counters WHERE page =3D %s
>=20
>=20
>=20
> I don't use MySQL, so I can't say if it supports "INSERT ... RETURNING ..=
."
>=20
> SQL syntax: should it, then you could insert the data and fetch
>=20
> the pin in one shot, with something like
>=20
>=20
>=20
>   INSERT INTO counters (page, hits) VALUES (%s, %s) RETURNING (pin)
>=20
>=20
>=20
> ciao, lele.
>=20
> --
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> nickname: Lele Gaifax | Quando vivr=C3=B2 di quello che ho pensato ieri
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> real: Emanuele Gaifas | comincer=C3=B2 ad aver paura di chi mi copia.
>=20
> lele@metapensiero.it  |                 -- Fortunato Depero, 1929.

I just tried this statement:

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
cursor.execute( '''INSERT INTO counters(page, hits) VALUES(%s, %s) RETURNIN=
G (pin)=20
								ON DUPLICATE KEY UPDATE hits =3D hits + 1''', (htmlpage, 1) )
	except MySQLdb.Error, e:
		print ( "Query Error: ", sys.exc_info()[1].excepinfo()[2] )
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

and the error python tells me is:

<type 'exceptions.AttributeError'>: 'ProgrammingError' object has no attrib=
ute 'excepinfo'=20
      args =3D ("'ProgrammingError' object has no attribute 'excepinfo'",)=
=20
      message =3D "'ProgrammingError' object has no attribute 'excepinfo'"