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Add verbose description for pre-LIMIT into EXPLAIN query

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This commit is contained in:
Azat Khuzhin 2021-08-05 21:05:46 +03:00
parent e36bc3bbaf
commit c4e2342a06
3 changed files with 10 additions and 7 deletions
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5
src/Interpreters/InterpreterSelectQuery.cpp
View File

@ -2429,7 +2429,10 @@ void InterpreterSelectQuery::executePreLimit(QueryPlan & query_plan, bool do_not
}
auto limit = std::make_unique<LimitStep>(query_plan.getCurrentDataStream(), limit_length, limit_offset);
limit->setStepDescription("preliminary LIMIT");
if (do_not_skip_offset)
limit->setStepDescription("preliminary LIMIT (with OFFSET)");
else
limit->setStepDescription("preliminary LIMIT (without OFFSET)");
query_plan.addStep(std::move(limit));
}
}

6
tests/queries/0_stateless/01562_optimize_monotonous_functions_in_order_by.reference
View File

@ -5,7 +5,7 @@ FROM test_order_by
ORDER BY timestamp ASC
LIMIT 10
Expression (Projection)
Limit (preliminary LIMIT)
Limit (preliminary LIMIT (without OFFSET))
MergingSorted (Merge sorted streams for ORDER BY)
MergeSorting (Merge sorted blocks for ORDER BY)
PartialSorting (Sort each block for ORDER BY)
@ -19,7 +19,7 @@ FROM test_order_by
ORDER BY toDate(timestamp) ASC
LIMIT 10
Expression (Projection)
Limit (preliminary LIMIT)
Limit (preliminary LIMIT (without OFFSET))
FinishSorting
Expression (Before ORDER BY)
SettingQuotaAndLimits (Set limits and quota after reading from storage)
@ -33,7 +33,7 @@ ORDER BY
timestamp ASC
LIMIT 10
Expression (Projection)
Limit (preliminary LIMIT)
Limit (preliminary LIMIT (without OFFSET))
FinishSorting
Expression (Before ORDER BY)
SettingQuotaAndLimits (Set limits and quota after reading from storage)

6
tests/queries/0_stateless/01576_alias_column_rewrite.reference
View File

@ -22,7 +22,7 @@ lambda
1
optimize_read_in_order
Expression (Projection)
Limit (preliminary LIMIT)
Limit (preliminary LIMIT (without OFFSET))
MergingSorted (Merge sorted streams for ORDER BY)
MergeSorting (Merge sorted blocks for ORDER BY)
PartialSorting (Sort each block for ORDER BY)
@ -30,13 +30,13 @@ Expression (Projection)
SettingQuotaAndLimits (Set limits and quota after reading from storage)
ReadFromMergeTree
Expression (Projection)
Limit (preliminary LIMIT)
Limit (preliminary LIMIT (without OFFSET))
FinishSorting
Expression (Before ORDER BY)
SettingQuotaAndLimits (Set limits and quota after reading from storage)
ReadFromMergeTree
Expression (Projection)
Limit (preliminary LIMIT)
Limit (preliminary LIMIT (without OFFSET))
FinishSorting
Expression (Before ORDER BY)
SettingQuotaAndLimits (Set limits and quota after reading from storage)