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Skip AggregateFunctionWindowFunnelData::merge() if other.events_list is empty.

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This commit is contained in:
philip.han 2020-03-21 14:47:06 +09:00
parent 7549c575b1
commit bf1aa44d19
1 changed files with 3 additions and 0 deletions
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3
dbms/src/AggregateFunctions/AggregateFunctionWindowFunnel.h
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@ -56,6 +56,9 @@ struct AggregateFunctionWindowFunnelData
void merge(const AggregateFunctionWindowFunnelData & other) void merge(const AggregateFunctionWindowFunnelData & other)
{ {
if (other.events_list.empty())
return;
const auto size = events_list.size(); const auto size = events_list.size();
events_list.insert(std::begin(other.events_list), std::end(other.events_list)); events_list.insert(std::begin(other.events_list), std::end(other.events_list));