2014-03-13 12:48:07 +00:00
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#pragma once
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#include <DB/Storages/StorageMergeTree.h>
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2015-04-16 06:12:35 +00:00
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#include <DB/DataStreams/IBlockOutputStream.h>
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2014-05-08 07:30:00 +00:00
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#include <iomanip>
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2014-03-13 12:48:07 +00:00
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namespace DB
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{
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class MergeTreeBlockOutputStream : public IBlockOutputStream
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{
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public:
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2014-03-19 10:45:13 +00:00
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MergeTreeBlockOutputStream(StorageMergeTree & storage_)
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: storage(storage_) {}
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2014-03-13 12:48:07 +00:00
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2014-09-17 22:57:02 +00:00
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void writePrefix() override
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{
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2016-09-04 17:12:07 +00:00
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/// If too much parts, do extra merges synchronously, in current thread.
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/// Why 10? - just in case, it is better than possibly infinite loop.
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2015-06-05 17:34:57 +00:00
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for (size_t i = 0; i < 10; ++i)
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{
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size_t parts_count = storage.data.getMaxPartsCountForMonth();
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if (parts_count <= storage.data.settings.parts_to_delay_insert)
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break;
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ProfileEvents::increment(ProfileEvents::SynchronousMergeOnInsert);
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2016-05-16 18:43:38 +00:00
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storage.merge(0, {}, {}, {}, {});
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2015-06-05 17:34:57 +00:00
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}
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2014-09-17 22:57:02 +00:00
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}
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void write(const Block & block) override
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2014-03-13 12:48:07 +00:00
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{
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2014-03-19 10:45:13 +00:00
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auto part_blocks = storage.writer.splitBlockIntoParts(block);
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2014-03-13 17:44:00 +00:00
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for (auto & current_block : part_blocks)
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2014-03-13 12:48:07 +00:00
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{
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2015-08-17 21:09:36 +00:00
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Int64 temp_index = storage.increment.get();
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2014-03-19 10:45:13 +00:00
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MergeTreeData::MutableDataPartPtr part = storage.writer.writeTempPart(current_block, temp_index);
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storage.data.renameTempPartAndAdd(part, &storage.increment);
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2015-06-05 17:34:57 +00:00
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2016-09-04 17:12:07 +00:00
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/// Initiate async merge - it will be done if it's good time for merge and if there are space in 'background_pool'.
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2014-07-03 08:51:11 +00:00
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storage.merge_task_handle->wake();
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2014-03-13 12:48:07 +00:00
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}
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}
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private:
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StorageMergeTree & storage;
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};
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}
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