Packages
dqe
0.1.21
0.4.15
0.4.14
0.4.13
0.4.12
0.4.11
0.4.10
0.4.9
0.4.8
0.4.7
0.4.6
0.4.5
0.4.4
0.4.3
0.4.2
0.4.1
0.4.0
0.3.25
0.3.24
0.3.23
0.3.22
0.3.21
0.3.20
0.3.19
0.3.18
0.3.17
0.3.16
0.3.15
0.3.14
0.3.13
0.3.12
0.3.11
0.3.10
0.3.9
0.3.8
0.3.7
0.3.6
0.3.5
0.3.4
0.3.3
0.3.2
0.3.1
0.2.2
0.2.1
0.2.0
0.1.36
0.1.35
0.1.34
0.1.33
0.1.22
0.1.21
0.1.20
0.1.10
0.1.9
DalmatinerDB query engine
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src/dqe_funnel.erl
-module(dqe_funnel).
-behaviour(dflow).
-export([init/1, describe/1, start/2, emit/3, done/2]).
-record(state, {buffer = [], refs = []}).
init([SubQs]) ->
SubQs1 = [{make_ref(), Q} || Q <- SubQs],
Refs = [R || {R, _} <- SubQs1],
{ok, #state{refs = Refs}, SubQs1}.
describe(_) ->
"funnel".
start({_Start, _Count}, State) ->
{ok, State}.
emit(Child, Data, State = #state{buffer = Buffer}) ->
State1 = State#state{buffer = orddict:store(Child, Data, Buffer)},
{ok, State1}.
done({last, _}, State = #state{buffer = B, refs = Rs}) ->
Data = [orddict:fetch(R, B) || R <- Rs],
{done, Data, State};
done(_O, State) ->
{ok, State}.