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From: Ludovic Brenta <ludovic@ludovic-brenta.org>
Newsgroups: comp.lang.ada
Subject: Re: mysql , gnade and function hanging
Date: Wed, 30 Jun 2010 02:23:21 -0700 (PDT)
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Date: 2010-06-30T02:23:21-07:00
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tonyg wrote on comp.lang.ada:
> On 30 June, 09:34, tonyg <tonytheg...@googlemail.com> wrote:
>> I am calling this gnade function in the mysql package to get some
>> debug info
>>
>> Put_Line(To_String(String_Field (TheDatabase, TheHeaterQuery, 1)));
>>
>> it unfortunately hangs though and the task stops
>>
>> I am thinking perhaps the whole task has either hung or terminated
>> without telling me.
>>
>> Would gnat tell me if this task had crashed?
>
> I put the code in a straight procedure and I get a constraint error
> which is
>
> raised CONSTRAINT_ERROR : gnu-db-mysql.adb:883 invalid data
>
> I am wondering what field types are good to use in a ada mysql
> database connection and what I am doing wrong here - has anybody any
> ideas ?

Looking at gnu-db-mysql.adb:883 (for gnade 1.6.1 or 1.6.2) indicates
that your variable TheHeaterQuery is not initialized.

--
Ludovic Brenta.