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

Martin Kersten Martin.Kersten at cwi.nl
Tue Oct 30 23:12:28 CET 2007


Simple check. Are you running both JDBC and mclient in parallel?
And what are your commit option settings?

Beware that running both in parallel are different users from a
database point off view. At least during the transaction.

Sander Kruseman wrote:
> Nothing fancy: I use the default user monetdb in both clients, working 
> in the sys schema. I start the JDBC client using:
>
> java -jar "C:\Program 
> Files\CWI\MonetDB5\share\MonetDB\lib\jdbcclient.jar" -l sql -u monetdb
> (java version "1.6.0_02")
>
> Happy hunting!
> Sander
>
> Romulo Goncalves wrote:
>   
>> 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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