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36 lines
862 B
C++
36 lines
862 B
C++
#pragma once
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#include <Common/HashTable/HashTableKeyHolder.h>
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#include <Columns/IColumn.h>
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namespace DB
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{
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struct Settings;
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template <bool is_plain_column = false>
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static auto getKeyHolder(const IColumn & column, size_t row_num, Arena & arena)
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{
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if constexpr (is_plain_column)
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{
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return ArenaKeyHolder{column.getDataAt(row_num), arena};
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}
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else
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{
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const char * begin = nullptr;
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StringRef serialized = column.serializeValueIntoArena(row_num, arena, begin);
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assert(serialized.data != nullptr);
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return SerializedKeyHolder{serialized, arena};
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}
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}
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template <bool is_plain_column>
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static void deserializeAndInsert(StringRef str, IColumn & data_to)
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{
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if constexpr (is_plain_column)
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data_to.insertData(str.data, str.size);
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else
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data_to.deserializeAndInsertFromArena(str.data);
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}
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}
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