I'm also curious about this:
How can we insert a new row unless one already exists, and in either case
return the primary key of the inserted/matched row?
Thanks,
Gili
On Thursday, October 25, 2012 4:31:19 PM UTC-4, Brent Ellwein wrote:
>
> OK, so how would the return case look? I assume that you mean I would
> set-up a pre-insert trigger which would do *something* before the insert
> actually happens and detect that the insert isn't necessary and then return
> a resulting value. Is that essentially what you are suggesting?
>
> I guess that I don't see how I'm going to get the ID back to the client
> using this mechanism. Can you provide an example?
>
> Thanks!
>
>
> On Thu, Oct 25, 2012 at 11:16 AM, Thomas Mueller
> <thomas.to...@gmail.com<javascript:>
> > wrote:
>
>> Hi,
>>
>> > BUT what I would like to do is write a stored procedure which does it
>> all at once and then returns the id value quickly
>>
>> Yes, you could use a user defined Java function
>>
>> > However, I cannot seem to cache the prepared statement in my function
>> call
>>
>> Is it *really* a big problem in this case? If yes, a workaround would be
>> to use a trigger, as within a trigger you can cache prepared statements
>> (see the class FullText for details how this can be done). In your case, it
>> would be a 'instead of insert' trigger I believe. Maybe even easier might
>> be a trigger on update (you wouldn't need to use the JDBC API in this case
>> I believe).
>>
>> Regards,
>> Thomas
>>
>>
>>
>> On Tue, Oct 23, 2012 at 7:04 AM, vrota...@gmail.com <javascript:> <
>> vrota...@gmail.com <javascript:>> wrote:
>>
>>>
>>> On Tue, Oct 23, 2012 at 3:10 AM, <brent....@gmail.com <javascript:>>wrote:
>>>
>>>> merge into File (filepath, filesize, datemodified) key (filepath)
>>>> values (?,?,?)
>>>
>>>
>>> I've just created a table and tried this from the H2 console
>>>
>>> merge into File (filepath, filesize, datemodified) key (filepath) values
>>> ('foo',9999,889)
>>>
>>> No exception. And I run it with more than once. So, I have no idea why
>>> you are getting one.
>>>
>>>
>>> --
>>> Vasile Rotaru
>>>
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