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34 lines
622 B
C++
34 lines
622 B
C++
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#include <DataStreams/FilterColumnsBlockInputStream.h>
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namespace DB
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{
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String FilterColumnsBlockInputStream::getID() const
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{
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std::stringstream res;
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res << "FilterColumnsBlockInputStream(" << children.back()->getID();
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for (const auto & it : columns_to_save)
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res << ", " << it;
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res << ")";
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return res.str();
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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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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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