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23 lines
679 B
C++
23 lines
679 B
C++
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#pragma once
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#include <Core/Block.h>
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#include <Core/SortDescription.h>
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namespace DB
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{
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/** Functions for manipulate constansts for sorting.
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* See MergeSortingBlocksBlockInputStream and FinishSortingBlockInputStream for details.
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*/
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/** Remove constant columns from block.
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*/
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void removeConstantsFromBlock(Block & block);
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void removeConstantsFromSortDescription(const Block & header, SortDescription & description);
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/** Add into block, whose constant columns was removed by previous function,
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* constant columns from header (which must have structure as before removal of constants from block).
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*/
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void enrichBlockWithConstants(Block & block, const Block & header);
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}
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