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58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
#pragma once
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#include <cstddef>
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#include <Core/Settings.h>
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#include <Storages/MergeTree/MergeTreeSettings.h>
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namespace DB
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{
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class MMappedFileCache;
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using MMappedFileCachePtr = std::shared_ptr<MMappedFileCache>;
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struct MergeTreeReaderSettings
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{
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size_t min_bytes_to_use_direct_io = 0;
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size_t min_bytes_to_use_mmap_io = 0;
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MMappedFileCachePtr mmap_cache;
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size_t max_read_buffer_size = DBMS_DEFAULT_BUFFER_SIZE;
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/// If save_marks_in_cache is false, then, if marks are not in cache,
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/// we will load them but won't save in the cache, to avoid evicting other data.
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bool save_marks_in_cache = false;
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/// Convert old-style nested (single arrays with same prefix, `n.a`, `n.b`...) to subcolumns of data type Nested.
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bool convert_nested_to_subcolumns = false;
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/// Validate checksums on reading (should be always enabled in production).
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bool checksum_on_read = true;
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};
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struct MergeTreeWriterSettings
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{
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MergeTreeWriterSettings() = default;
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MergeTreeWriterSettings(
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const Settings & global_settings,
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const MergeTreeSettingsPtr & storage_settings,
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bool can_use_adaptive_granularity_,
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bool rewrite_primary_key_,
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bool blocks_are_granules_size_ = false)
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: min_compress_block_size(
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storage_settings->min_compress_block_size ? storage_settings->min_compress_block_size : global_settings.min_compress_block_size)
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, max_compress_block_size(
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storage_settings->max_compress_block_size ? storage_settings->max_compress_block_size
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: global_settings.max_compress_block_size)
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, can_use_adaptive_granularity(can_use_adaptive_granularity_)
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, rewrite_primary_key(rewrite_primary_key_)
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, blocks_are_granules_size(blocks_are_granules_size_)
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{
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}
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size_t min_compress_block_size;
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size_t max_compress_block_size;
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bool can_use_adaptive_granularity;
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bool rewrite_primary_key;
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bool blocks_are_granules_size;
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};
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}
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