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Update dbms/src/Interpreters/InterpreterSelectQuery.cpp

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Co-Authored-By: Alexander Kuzmenkov <36882414+akuzm@users.noreply.github.com>
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Anton Popov 2019-11-15 17:09:34 +03:00 committed by GitHub
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commit 0318e6d820
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dbms/src/Interpreters/InterpreterSelectQuery.cpp
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@ -2262,6 +2262,8 @@ void InterpreterSelectQuery::executeOrder(Pipeline & pipeline, InputSortingInfoP
* or reverse order of sorting key using one input stream per part * or reverse order of sorting key using one input stream per part
* and then merge them into one sorted stream. * and then merge them into one sorted stream.
* At this stage we merge per-thread streams into one. * At this stage we merge per-thread streams into one.
* If the input is sorted by some prefix of the sorting key required for output,
* we have to finish sorting after the merge.
*/ */
bool need_finish_sorting = (input_sorting_info->order_key_prefix_descr.size() < output_order_descr.size()); bool need_finish_sorting = (input_sorting_info->order_key_prefix_descr.size() < output_order_descr.size());