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dbms: fixed performance issue caused by typo [#METR-14654].

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Alexey Milovidov 2015-01-19 22:51:46 +03:00
parent b3bee6ac08
commit a54a634595
3 changed files with 14 additions and 1 deletions
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2
dbms/include/DB/AggregateFunctions/AggregateFunctionGroupArray.h
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@ -47,7 +47,7 @@ public:
void merge(AggregateDataPtr place, ConstAggregateDataPtr rhs) const void merge(AggregateDataPtr place, ConstAggregateDataPtr rhs) const
{ {
data(place).value.insert(data(place).value.begin(), data(rhs).value.begin(), data(rhs).value.end()); data(place).value.insert(data(place).value.end(), data(rhs).value.begin(), data(rhs).value.end());
} }
void serialize(ConstAggregateDataPtr place, WriteBuffer & buf) const void serialize(ConstAggregateDataPtr place, WriteBuffer & buf) const

12
dbms/tests/queries/0_stateless/00113_group_array.reference Normal file
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@ -0,0 +1,12 @@
0 100
1 100
2 100
3 100
4 100
5 100
6 100
7 100
8 100
9 100
0 1000000

1
dbms/tests/queries/0_stateless/00113_group_array.sql Normal file
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@ -0,0 +1 @@
SELECT intDiv(number, 100) AS k, length(groupArray(number)) FROM (SELECT * FROM system.numbers LIMIT 1000000) GROUP BY k WITH TOTALS ORDER BY k LIMIT 10;