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53 lines
1.1 KiB
C++
53 lines
1.1 KiB
C++
#pragma once
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#include <DB/Common/PODArray.h>
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#include <DB/Core/Block.h>
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#include <DB/Core/ColumnNumbers.h>
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namespace DB
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{
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namespace Conditional
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{
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/// This class provides access to the values of a condition in a multiIf function.
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class CondSource final
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{
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public:
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CondSource(const Block & block, const ColumnNumbers & args, size_t i);
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CondSource(const CondSource &) = delete;
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CondSource & operator=(const CondSource &) = delete;
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CondSource(CondSource &&) = default;
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CondSource & operator=(CondSource &&) = default;
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/// Get the value of this condition for a given row.
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inline UInt8 get(size_t row) const
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{
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return data_array[row];
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}
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inline size_t getSize() const
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{
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return data_array.size();
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}
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private:
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static const ColumnPtr initMaterializedCol(const Block & block, const ColumnNumbers & args, size_t i);
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static const PaddedPODArray<UInt8> & initDataArray(const Block & block, const ColumnNumbers & args,
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size_t i, const ColumnPtr & materialized_col_);
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private:
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const ColumnPtr materialized_col;
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const PaddedPODArray<UInt8> & data_array;
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static const ColumnPtr null_materialized_col;
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};
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using CondSources = std::vector<CondSource>;
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}
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}
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