[MonetDB-users] 'on delete cascade' constraint over mapi fails

Romulo Goncalves R.A.Goncalves at cwi.nl
Tue Oct 30 22:33:57 CET 2007


Sander Kruseman wrote:
> Romulo,
> 
> I can confirm your results when setting up the tables from mclient. But 
> I still get the failure when setting up the tables over JDBC and then 
> delete the parent record from mclient.
Ok I will debug that problem tomorrow morning. I just need to know how 
do you connect with your JDBC. Which user do you use? The same as 
mclient? Give me the commands and then I will debug the problem.

Regards,
Romulo
> 
> (Not that this is my intended way of working. I just stubled upon this, 
> developing my mapi client code and using the JDBC terminal for import of 
> SQL scripts.)
> 
> Sander
> 
> Romulo Goncalves wrote:
>> Sander Kruseman wrote:
>>> Hi Romulo,
>>>
>>> Thanks for your response. I downloaded the latest Windows installer 
>>> today, and installed on XP.
>> Me too and everything works fine. I used the SQL client (which is the 
>> mclient -lsql) from the start menu to execute the queries on the 
>> Mserver5 with SQL module loaded (also from the start menu).
>>
>> I did a select after the delete and both tables are empty.
>>
>> You need to find a solution to simulate this in my machine if not I am 
>> not able to help you.
>>
>> Regards,
>> Romulo
>>> # MonetDB server v5.2.0, based on kernel v1.20.0
>>> ...
>>> # MonetDB/SQL module v2.20.0 loaded
>>>
>>> Good to hear that apparently this has been fixed in the CVS trunk.
>>>
>>> Regards,
>>> Sander
>>>
>>> Romulo Goncalves wrote:
>>>> Sander Kruseman wrote:
>>>>> Consider the following setup:
>>>>>
>>>>> CREATE TABLE parent (key int PRIMARY KEY);
>>>>> CREATE TABLE child (parent_key int REFERENCES parent (key) ON DELETE 
>>>>> CASCADE);
>>>>>
>>>>> INSERT INTO parent VALUES (1);
>>>>> INSERT INTO child VALUES (1);
>>>>>
>>>>> Issuing from the JDBC terminal: DELETE FROM parent WHERE key = 1;
>>>>> properly results in deletion of both records.
>>>>>
>>>>> However, when issued over mapi, either from my custom C++ code or from 
>>>>> the provided Monet SQL client console, the same statement only deletes 
>>>>> the row from 'parent', ignoring the cascading constraint.
>>>> I just used my mclient to execute the queries on my MonetDB5 (5.21 
>>>> current cvs branch) with the SQL module loaded and it works.
>>>>
>>>> Which version are you using and platform?
>>>>
>>>> Regards,
>>>> Romulo
>>>>> Kind regards,
>>>>> Sander Kruseman
>>>>>
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