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35 lines
726 B
C++
35 lines
726 B
C++
#include <DataStreams/FilterColumnsBlockInputStream.h>
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namespace DB
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{
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Block FilterColumnsBlockInputStream::getHeader() const
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{
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Block block = children.back()->getHeader();
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Block filtered;
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for (const auto & it : columns_to_save)
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if (throw_if_column_not_found || block.has(it))
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filtered.insert(std::move(block.getByName(it)));
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return filtered;
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}
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Block FilterColumnsBlockInputStream::readImpl()
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{
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Block block = children.back()->read();
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if (!block)
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return block;
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Block filtered;
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for (const auto & it : columns_to_save)
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if (throw_if_column_not_found || block.has(it))
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filtered.insert(std::move(block.getByName(it)));
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return filtered;
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}
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}
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