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Fixed segfaults in quantiles* functions with empty levels set. [#METR-23285]

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This commit is contained in:
Vitaliy Lyudvichenko 2016-10-27 17:51:43 +03:00 committed by Alexey Milovidov
parent 316a52c847
commit 8360d15012
5 changed files with 31 additions and 0 deletions
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3
dbms/include/DB/AggregateFunctions/AggregateFunctionQuantileExactWeighted.h
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@ -233,6 +233,9 @@ public:
size_t num_levels = levels.size();
offsets_to.push_back((offsets_to.size() == 0 ? 0 : offsets_to.back()) + num_levels);
if (!num_levels)
return;
typename ColumnVector<ValueType>::Container_t & data_to = static_cast<ColumnVector<ValueType> &>(arr_to.getData()).getData();
size_t old_size = data_to.size();

6
dbms/include/DB/AggregateFunctions/AggregateFunctionQuantileTDigest.h
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@ -541,6 +541,9 @@ public:
size_t size = levels.size();
offsets_to.push_back((offsets_to.size() == 0 ? 0 : offsets_to.back()) + size);
if (!size)
return;
if (returns_float)
{
typename ColumnFloat32::Container_t & data_to = static_cast<ColumnFloat32 &>(arr_to.getData()).getData();
@ -623,6 +626,9 @@ public:
size_t size = levels.size();
offsets_to.push_back((offsets_to.size() == 0 ? 0 : offsets_to.back()) + size);
if (!size)
return;
if (returns_float)
{
typename ColumnFloat32::Container_t & data_to = static_cast<ColumnFloat32 &>(arr_to.getData()).getData();

6
dbms/include/DB/AggregateFunctions/AggregateFunctionQuantileTiming.h
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@ -958,6 +958,9 @@ public:
size_t size = levels.size();
offsets_to.push_back((offsets_to.size() == 0 ? 0 : offsets_to.back()) + size);
if (!size)
return;
typename ColumnFloat32::Container_t & data_to = static_cast<ColumnFloat32 &>(arr_to.getData()).getData();
size_t old_size = data_to.size();
data_to.resize(data_to.size() + size);
@ -1021,6 +1024,9 @@ public:
size_t size = levels.size();
offsets_to.push_back((offsets_to.size() == 0 ? 0 : offsets_to.back()) + size);
if (!size)
return;
typename ColumnFloat32::Container_t & data_to = static_cast<ColumnFloat32 &>(arr_to.getData()).getData();
size_t old_size = data_to.size();
data_to.resize(data_to.size() + size);

8
dbms/tests/queries/0_stateless/00382_quantiles_empty_levels_segfaults.reference Normal file
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@ -0,0 +1,8 @@
[]
[]
[]
[]
[]
[]
[]
[]

8
dbms/tests/queries/0_stateless/00382_quantiles_empty_levels_segfaults.sql Normal file
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@ -0,0 +1,8 @@
select quantiles(number) as q from (select * from system.numbers LIMIT 1000);
select quantilesExact(number) as q from (select * from system.numbers LIMIT 1000);
select quantilesExactWeighted(number, number) as q from (select * from system.numbers LIMIT 1000);
select quantilesDeterministic(number, 10000000) as q from (select * from system.numbers LIMIT 1000);
select quantilesTiming(number) as q from (select * from system.numbers LIMIT 1000);
select quantilesTimingWeighted(number, number) as q from (select * from system.numbers LIMIT 1000);
select quantilesTDigest(number) as q from (select * from system.numbers LIMIT 1000);
select quantilesTDigestWeighted(number, number) as q from (select * from system.numbers LIMIT 1000);