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Cover distributed_push_down_limit for queries w/o sharding expr

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Azat Khuzhin 2021-07-17 17:16:29 +03:00
parent 2fb95d9ee0
commit c830964240
2 changed files with 35 additions and 0 deletions
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32
tests/queries/0_stateless/01951_distributed_push_down_limit.reference Normal file
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-- { echo }
explain select * from remote('127.{1,2}', view(select * from numbers(1e6))) order by number limit 10 settings distributed_push_down_limit=0;
Expression (Projection)
Limit (preliminary LIMIT)
MergingSorted (Merge sorted streams after aggregation stage for ORDER BY)
SettingQuotaAndLimits (Set limits and quota after reading from storage)
Union
MergingSorted (Merge sorted streams for ORDER BY)
MergeSorting (Merge sorted blocks for ORDER BY)
PartialSorting (Sort each block for ORDER BY)
Expression (Before ORDER BY)
SettingQuotaAndLimits (Set limits and quota after reading from storage)
Expression ((Convert VIEW subquery result to VIEW table structure + (Materialize constants after VIEW subquery + (Projection + Before ORDER BY))))
SettingQuotaAndLimits (Set limits and quota after reading from storage)
ReadFromStorage (SystemNumbers)
ReadFromRemote (Read from remote replica)
explain select * from remote('127.{1,2}', view(select * from numbers(1e6))) order by number limit 10 settings distributed_push_down_limit=1;
Expression (Projection)
Limit (preliminary LIMIT)
MergingSorted (Merge sorted streams after aggregation stage for ORDER BY)
SettingQuotaAndLimits (Set limits and quota after reading from storage)
Union
Limit (preliminary LIMIT)
MergingSorted (Merge sorted streams for ORDER BY)
MergeSorting (Merge sorted blocks for ORDER BY)
PartialSorting (Sort each block for ORDER BY)
Expression (Before ORDER BY)
SettingQuotaAndLimits (Set limits and quota after reading from storage)
Expression ((Convert VIEW subquery result to VIEW table structure + (Materialize constants after VIEW subquery + (Projection + Before ORDER BY))))
SettingQuotaAndLimits (Set limits and quota after reading from storage)
ReadFromStorage (SystemNumbers)
ReadFromRemote (Read from remote replica)

3
tests/queries/0_stateless/01951_distributed_push_down_limit.sql Normal file
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-- { echo }
explain select * from remote('127.{1,2}', view(select * from numbers(1e6))) order by number limit 10 settings distributed_push_down_limit=0;
explain select * from remote('127.{1,2}', view(select * from numbers(1e6))) order by number limit 10 settings distributed_push_down_limit=1;