Mnemosyne

Sean Hinde <>
Tue Oct 30 18:01:28 CET 2001


> On Tue, 30 Oct 2001, Sean Hinde wrote:
> 
> >In R8B ets you can specify the number of rows which are
> >returned from a match or select call so you could do a match on
> >each record type in turn with ets:match(Tab, Pattern Max_rows)
> >where Max_rows is set to 1.
> >
> >Unfortunately mnesia doesn't support this addition to ets but I
> >dare say that might follow sometime. Meanwhile you can do ets
> >operations directly on local mnesia tables so long as you don't
> >want any transaction safety.
> 
> Actually, mnesia _does_ support select() in R8B:

OK, I should have amended the above paragraphs to read:

In R8B ets you can specify the number of rows which are
returned from a match or select call so you could do a match on
each record type in turn with ets:match(Tab, Pattern, Max_rows)
where Max_rows is set to 1.

Unfortunately mnesia doesn't support this addition to ets but I
dare say that might follow sometime. Meanwhile you can do these ets
operations directly on local mnesia tables so long as you don't
want any transaction safety.

Apologies for the lack of clarity

Sean



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