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Re: [Database Problem] mdb -> MySQL

To: REALbasic NUG <realbasic-nug at lists dot realsoftware dot com>
Subject: Re: [Database Problem] mdb -> MySQL
From: Tom Benson <tombenson at mac dot com>
Date: Tue, 31 May 2005 10:04:57 +1000
Delivered-to: realbasic-nug at lists dot realsoftware dot com
References: <1BB40778E8B10444B742109270B97B0E67AA1C at OWBSW2KVX2 dot jostens dot com>
Right... mostly because this table is not designed to be added to outside of development...

I tried what you said anyway just for kicks, but still no go. Remeber this is a SELECT statement, and a very simple one, that is causing the error.

Just can't wrap my head around this.. v. weird

Cheers,
Tom

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On 31/05/2005, at 12:28 AM, Dixon, Tom wrote:

Hmmm... Why would you want a table that allows one to insert a
completely Null record. If you change your record id "idstore" to
NotNull then this may fix your problem. You probably would want to set
it to AutoNumber also...

HTH

Tom


I've dumped a fairly hefty mdb database into MySQL (4.0.20a
-> provided by hosting service) with some difficulty, however
I'm having a weird issue with one particular table.

the error is coming back as:

Invalid use of Null - Err.Number:94 - SQL:SELECT
idCategoryStart FROM stores WHERE idStore=1

stores is a VERY basic table, with the schema lifted straight
over from the MDB database.

It looks like this under MySQL:

   `idStore` int(4) default NULL,
   `storeDescription` varchar(50) default NULL,
   `idCategoryStart` int(4) default NULL

and looks like this under JET / MDB

idStore    integer(4)    precision(10)    may defer, unknown
updatable, fixed, may be NULL
storeDescription    VarWChar(50)    precision(255)    may defer,
unknown updatable, can be set to NULL, may be NULL
idCategoryStart    integer(4)    precision(10)    may defer, unknown
updatable, fixed, can be set to NULL, may be NULL

As far as I can tell, these two schema are directly equivalent

Both have the record

1    English    1

The query works fine under the MDB database, but I get the
"invalid use of NULL' under MySQL.

Help me, I'm going insane!

Cheers,
Tom

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