[erlang-questions] Mnesia Dirty select -> use of "or" in guards

[Ulf Wiger]

Try [ {'or', {'==', '$2', "public"}, {'==', '$2', "universal"}} ]

BR,
Ulf W

On 25 May 2013, at 13:50, Manoj Raj wrote:

> Hi,
> 
> I have the following record schema saved in the table(eg)
> 
> -record(details,{user,age,hobby,status}).
> 
> I want to select the hobby from the mnesia table when the status is "public" or "universal"
> 
> I have written the following query for testing
> 
> mnesia:dirty_select(details,
> [
> {
> #details{ user= "manoj", _ = '_', hobby = '$1', status='$2' },
> [{'==', '$2', "public"}],
> ['$1']
> }
> ]).
> 
> It works fine...How should i add orelse inside the guard sequence...I want to check whether status is equal to "public" or "universal"...
> 
> Is there a way or should i go the qlc way?
> 
> Thank you
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Ulf Wiger, Co-founder & Developer Advocate, Feuerlabs Inc.
http://feuerlabs.com



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