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48 lines
1.1 KiB
C++
48 lines
1.1 KiB
C++
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#pragma once
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#include <Common/FieldVisitors.h>
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namespace DB
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{
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/** Implements `+=` operation.
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* Returns false if the result is zero.
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*/
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class FieldVisitorSum : public StaticVisitor<bool>
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{
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private:
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const Field & rhs;
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public:
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explicit FieldVisitorSum(const Field & rhs_);
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// We can add all ints as unsigned regardless of their actual signedness.
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bool operator() (Int64 & x) const;
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bool operator() (UInt64 & x) const;
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bool operator() (Float64 & x) const;
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bool operator() (Null &) const;
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bool operator() (String &) const;
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bool operator() (Array &) const;
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bool operator() (Tuple &) const;
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bool operator() (Map &) const;
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bool operator() (UUID &) const;
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bool operator() (AggregateFunctionStateData &) const;
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template <typename T>
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bool operator() (DecimalField<T> & x) const
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{
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x += get<DecimalField<T>>(rhs);
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return x.getValue() != T(0);
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}
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template <typename T, typename = std::enable_if_t<is_big_int_v<T>> >
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bool operator() (T & x) const
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{
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x += rhs.reinterpret<T>();
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return x != T(0);
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}
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};
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}
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