IColumn::updatePermutation method to perform sorting by multiple columns in batch fashion#10831
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MorozovVasily wants to merge 6 commits intoClickHouse:masterfrom
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IColumn::updatePermutation method to perform sorting by multiple columns in batch fashion#10831MorozovVasily wants to merge 6 commits intoClickHouse:masterfrom
MorozovVasily wants to merge 6 commits intoClickHouse:masterfrom
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alexey-milovidov
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You have to leave only one category and write some description about this PR. |
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It is easier for me to fix tests failures by myself. This PR will be merged automatically. |
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Auto-merge did not work 😓 |
amosbird
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Jan 27, 2022
We have special optimizations for multiple column ORDER BY: ClickHouse#10831 . It's beneficial to also apply to tuple columns. Before: select * from numbers(300000000) order by (1 - number , number + 1 , number) limit 10; 2.613 sec. After: select * from numbers(300000000) order by (1 - number , number + 1 , number) limit 10; 0.755 sec No tuple: select * from numbers(300000000) order by 1 - number , number + 1 , number limit 10; 0.755 sec
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Add IColumn::updatePermutation method to perform sorting by multiple columns in batch fashion