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33 lines
2.2 KiB
Plaintext
33 lines
2.2 KiB
Plaintext
-- { echo }
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explain select * from remote('127.{1,2}', view(select * from numbers(1e6))) order by number limit 10 settings distributed_push_down_limit=0;
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Expression (Projection)
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Limit (preliminary LIMIT (without OFFSET))
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MergingSorted (Merge sorted streams after aggregation stage for ORDER BY)
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SettingQuotaAndLimits (Set limits and quota after reading from storage)
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Union
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MergingSorted (Merge sorted streams for ORDER BY)
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MergeSorting (Merge sorted blocks for ORDER BY)
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PartialSorting (Sort each block for ORDER BY)
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Expression (Before ORDER BY)
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SettingQuotaAndLimits (Set limits and quota after reading from storage)
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Expression ((Convert VIEW subquery result to VIEW table structure + (Materialize constants after VIEW subquery + (Projection + Before ORDER BY))))
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SettingQuotaAndLimits (Set limits and quota after reading from storage)
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ReadFromStorage (SystemNumbers)
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ReadFromRemote (Read from remote replica)
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explain select * from remote('127.{1,2}', view(select * from numbers(1e6))) order by number limit 10 settings distributed_push_down_limit=1;
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Expression (Projection)
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Limit (preliminary LIMIT (without OFFSET))
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MergingSorted (Merge sorted streams after aggregation stage for ORDER BY)
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SettingQuotaAndLimits (Set limits and quota after reading from storage)
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Union
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Limit (preliminary LIMIT (with OFFSET))
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MergingSorted (Merge sorted streams for ORDER BY)
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MergeSorting (Merge sorted blocks for ORDER BY)
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PartialSorting (Sort each block for ORDER BY)
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Expression (Before ORDER BY)
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SettingQuotaAndLimits (Set limits and quota after reading from storage)
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Expression ((Convert VIEW subquery result to VIEW table structure + (Materialize constants after VIEW subquery + (Projection + Before ORDER BY))))
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SettingQuotaAndLimits (Set limits and quota after reading from storage)
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ReadFromStorage (SystemNumbers)
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ReadFromRemote (Read from remote replica)
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