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86 lines
3.2 KiB
C++
86 lines
3.2 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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#include <IO/WriteSettings.h>
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#include <Parsers/ExpressionElementParsers.h>
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#include <Parsers/parseQuery.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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/// Common read settings.
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ReadSettings read_settings;
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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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/// Validate checksums on reading (should be always enabled in production).
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bool checksum_on_read = true;
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/// True if we read in order of sorting key.
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bool read_in_order = false;
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/// Deleted mask is applied to all reads except internal select from mutate some part columns.
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bool apply_deleted_mask = true;
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/// Put reading task in a common I/O pool, return Async state on prepare()
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bool use_asynchronous_read_from_pool = false;
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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 WriteSettings & query_write_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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, marks_compression_codec(storage_settings->marks_compression_codec)
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, marks_compress_block_size(storage_settings->marks_compress_block_size)
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, compress_primary_key(storage_settings->compress_primary_key)
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, primary_key_compression_codec(storage_settings->primary_key_compression_codec)
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, primary_key_compress_block_size(storage_settings->primary_key_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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, query_write_settings(query_write_settings_)
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{
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}
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CompressionCodecPtr getMarksCompressionCodec() const
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{
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ParserCodec codec_parser;
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auto ast = parseQuery(codec_parser, "(" + Poco::toUpper(marks_compression_codec) + ")", 0, DBMS_DEFAULT_MAX_PARSER_DEPTH);
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return CompressionCodecFactory::instance().get(ast, nullptr);
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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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String marks_compression_codec;
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size_t marks_compress_block_size;
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bool compress_primary_key;
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String primary_key_compression_codec;
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size_t primary_key_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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WriteSettings query_write_settings;
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};
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}
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