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41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
#pragma once
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#include <DB/Core/NamesAndTypes.h>
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#include <DB/Columns/IColumnDummy.h>
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namespace DB
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{
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class ExpressionActions;
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/** A column containing a lambda expression.
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* Behaves like a constant-column. Contains an expression, but not input or output data.
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*/
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class ColumnExpression final : public IColumnDummy
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{
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private:
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using ExpressionActionsPtr = std::shared_ptr<ExpressionActions>;
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public:
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ColumnExpression(size_t s_, ExpressionActionsPtr expression_, const NamesAndTypes & arguments_, DataTypePtr return_type_, String return_name_);
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ColumnExpression(size_t s_, ExpressionActionsPtr expression_, const NamesAndTypesList & arguments_, DataTypePtr return_type_, String return_name_);
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std::string getName() const override;
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ColumnPtr cloneDummy(size_t s_) const override;
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const ExpressionActionsPtr & getExpression() const;
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const DataTypePtr & getReturnType() const;
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const std::string & getReturnName() const;
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const NamesAndTypes & getArguments() const;
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Names getArgumentNames() const;
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private:
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ExpressionActionsPtr expression;
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NamesAndTypes arguments;
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DataTypePtr return_type;
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std::string return_name;
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};
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}
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