[erlang-bugs] QLC boolean condition

Bernard Duggan <>
Tue Apr 1 01:30:47 CEST 2014


Hi all,
It looks like QLC doesn't quite handle boolean operators in its filters
correctly. For the following code:

-------------------

-module(qlc_bug).
-include_lib("stdlib/include/qlc.hrl").
-compile(export_all).

-record(
     rec, {
         a, b
     }).

test() ->
     T = ets:new(test, [{keypos, 2}]),
     ets:insert(T, #rec{a = 1, b = 1}),
     ets:insert(T, #rec{a = 2, b = 2}),
     qlc:e(qlc:q([A || A <- ets:table(T), A#rec.a =:= 1 orelse (A#rec.a
=:= 2 andalso A#rec.b =:= 1)])).

-------------------

I would expect a call to test/0 to return [{rec, 1, 1}], since the
second record ({rec, 2, 2}) should be excluded by the right hand side of
the 'andalso'. However the returned value is [{rec,1,1},{rec,2,2}].

(Tested on R16B03).

Cheers,

Bernard

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