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63e674280b
That way with send_logs_level='debug', you will not get verbose
information that you already has, since there is summary row:
Selected ... parts by partition key, ... parts by primary key, ... marks by primary key, ... marks to read from ... ranges
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
33 lines
1.0 KiB
C++
33 lines
1.0 KiB
C++
#pragma once
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#include <Storages/MergeTree/MergeTreeSelectProcessor.h>
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namespace DB
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{
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/// Used to read data from single part with select query in order of primary key.
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/// Cares about PREWHERE, virtual columns, indexes etc.
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/// To read data from multiple parts, Storage (MergeTree) creates multiple such objects.
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class MergeTreeInOrderSelectProcessor final : public MergeTreeSelectProcessor
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{
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public:
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template <typename... Args>
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explicit MergeTreeInOrderSelectProcessor(Args &&... args)
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: MergeTreeSelectProcessor{std::forward<Args>(args)...}
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{
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LOG_TRACE(log, "Reading {} ranges in order from part {}, approx. {} rows starting from {}",
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all_mark_ranges.size(), data_part->name, total_rows,
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data_part->index_granularity.getMarkStartingRow(all_mark_ranges.front().begin));
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}
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String getName() const override { return "MergeTreeInOrder"; }
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private:
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bool getNewTaskImpl() override;
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void finalizeNewTask() override {}
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Poco::Logger * log = &Poco::Logger::get("MergeTreeInOrderSelectProcessor");
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};
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}
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