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Add support for many columns

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This commit is contained in:
Sofia Antipushina 2020-05-16 02:06:25 +03:00
parent 13224c22ab
commit 7c6322c5b0
1 changed files with 4 additions and 2 deletions
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6
src/AggregateFunctions/AggregateFunctionDistinct.h
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@ -42,12 +42,13 @@ class AggregateFunctionDistinct final : public IAggregateFunctionHelper<Aggregat
{
private:
AggregateFunctionPtr nested_func;
size_t num_arguments;
mutable AggregateFunctionDistinctData storage;
public:
AggregateFunctionDistinct(AggregateFunctionPtr nested, const DataTypes & arguments)
: IAggregateFunctionHelper<AggregateFunctionDistinct>(arguments, {})
, nested_func(nested)
, nested_func(nested), num_arguments(arguments.size())
{
if (arguments.empty())
throw Exception("Aggregate function " + getName() + " require at least one argument", ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
@ -90,7 +91,8 @@ public:
void add(AggregateDataPtr place, const IColumn ** columns, size_t row_num, Arena * arena) const override
{
SipHash hash;
columns[0]->updateHashWithValue(row_num, hash);
for (size_t i = 0; i < num_arguments; ++i)
columns[i]->updateHashWithValue(row_num, hash);
UInt128 key;
hash.get128(key.low, key.high);