[aida] ODBC incompatibility?

Janko Mivšek janko.mivsek at eranova.si
Tue Oct 28 23:22:22 CET 2008


Thanks Rob for the patch.

In few words, what change is needed in Swazoo (or Sport) to avoid this 
ODBC problem without any patching? Maybe patching Sport or Swazoo will 
be easier than changing the "official" ODBC package. Or no?

Janko


Rob Rothwell wrote:
> Hello all...try this ODBC changeset, which works with Swazoo...
> 
> Sorry about the delay; I was at a conference without internet all last week!
> 
> I don't remember how I fixed it many many months ago; but it had 
> something to do with the constants that get loaded in the change set.
> 
> Hope this helps...
> 
> Rob
> 
> On Fri, Oct 17, 2008 at 5:46 AM, Bèrto ëd Sèra <berto.d.sera na gmail.com 
> <mailto:berto.d.sera na gmail.com>> wrote:
> 
>     FYI
> 
>     something weird really happens: if you search in the image for the
>     class Timestamp you get 5 matches:
>     TimeStamp
>     SQLTimestamp
>     SPTimestamp
>     TimeStamp
>     TimeStampTest
> 
>     the 1st and the 4th both will get you the to Magnitude subclass. It
>     looks as if something badly puzzled the image.
>     Berto
> 
> 
>     2008/10/17 Janko Mivšek <janko.mivsek na eranova.si
>     <mailto:janko.mivsek na eranova.si>>
> 
>         Hi Bèrto,
> 
>         This is really funny. Swazoo strictly uses Sport's SpTimestamp
>         and not
>         any of Squeak versions of Timestamp, so I can't see how ODBC
>         code can
>         override something by accident.
> 
>         Have someone a bit time to reproduce and investigate this case?
> 
>         Janko
> 
>         Bèrto ëd Sèra wrote:
>          > Hi!
>          >
>          > I observed something funny. To use ODBC for squeak I first
>         need to file
>          > in the FFI package (otherwise I miss the ExternalEntity
>         class). But this
>          > seems to break swazoo, which becomes irresponsive. On
>         restarting the
>          > image it says that Timestamp does not understand a number of
>         methods. I
>          > can't seem to find the point in FFI and/or ODBC that redefine
>         anything
>          > in Timestamp, though. I surely find a new:
>          >
>          > Magnitude subclass: #TimeStamp
>          >     instanceVariableNames: 'date time'
>          >     classVariableNames: ''
>          >     poolDictionaries: ''
>          >     category: 'Kernel-Magnitudes'
>          >
>          >
>          > The broken method on SPTimestamp is
>          > ===================================
>          > asRFC1123StringOn: targetStream
>          >     "^self
>          >     Code taken from Swazoo Timestamp extenton with the following
>          > comment: FIXME: Assumes
>          >     server's clock is GMT. Should convert server's clock to
>         GMT if it is
>          > not. Besides that,
>          >     this whole method is really ugly."
>          >     targetStream nextPutAll: (self underlyingTimestamp asDate
>         weekday
>          > copyFrom: 1 to: 3);
>          >         nextPutAll: ', '.
>          >     self underlyingTimestamp *day* < 10 ifTrue: [targetStream
>         nextPut: $0].
>          >     self underlyingTimestamp asDate printOn: targetStream
>         format: #(1 2
>          > 3 $  2 1).
>          >     targetStream space.
>          >     self underlyingTimestamp *printHMSOn:* targetStream.
>          >     targetStream nextPutAll: ' GMT'
>          > ===================================
>          >
>          > Now, how can this happen? The two classes have different
>         names, don't
>          > they? In my visualworks days I cannot remember any such
>         incident. Can
>          > anyone give me a hint?
>          >
>          > To repeat the bug:
>          > 1) Get a fresh once-click image
>          > 2) install FFI
>          > 3) install ODBC for Squeak
>          >
>          > Thanks
>          > Berto
>          >
>          >
>          >
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>         --
>         Janko Mivšek
>         AIDA/Web
>         Smalltalk Web Application Server
>         http://www.aidaweb.si
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-- 
Janko Mivšek
AIDA/Web
Smalltalk Web Application Server
http://www.aidaweb.si


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