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86 lines
2.6 KiB
C++
86 lines
2.6 KiB
C++
#pragma once
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#include <DB/Functions/IFunction.h>
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#include <DB/DataTypes/IDataType.h>
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#include <DB/Core/ColumnNumbers.h>
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namespace DB
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{
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class Block;
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class Context;
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class FunctionIsNull : public IFunction
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{
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public:
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static constexpr auto name = "isNull";
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static FunctionPtr create(const Context & context);
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std::string getName() const override;
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bool hasSpecialSupportForNulls() const override;
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override;
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void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
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};
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class FunctionIsNotNull : public IFunction
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{
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public:
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static constexpr auto name = "isNotNull";
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static FunctionPtr create(const Context & context);
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std::string getName() const override;
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bool hasSpecialSupportForNulls() const override;
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override;
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void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
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};
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class FunctionCoalesce : public IFunction
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{
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public:
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static constexpr auto name = "coalesce";
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static FunctionPtr create(const Context & context);
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std::string getName() const override;
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bool hasSpecialSupportForNulls() const override;
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override;
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void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
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};
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class FunctionIfNull : public IFunction
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{
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public:
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static constexpr auto name = "ifNull";
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static FunctionPtr create(const Context & context);
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std::string getName() const override;
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bool hasSpecialSupportForNulls() const override;
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override;
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void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
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};
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class FunctionNullIf : public IFunction
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{
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public:
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static constexpr auto name = "nullIf";
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static FunctionPtr create(const Context & context);
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std::string getName() const override;
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bool hasSpecialSupportForNulls() const override;
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override;
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void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
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};
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class FunctionAssumeNotNull : public IFunction
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{
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public:
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static constexpr auto name = "assumeNotNull";
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static FunctionPtr create(const Context & context);
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std::string getName() const override;
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bool hasSpecialSupportForNulls() const override;
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override;
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void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
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};
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}
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