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#include "StorageSystemFilesystemCache.h"
#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypesNumber.h>
#include <DataTypes/DataTypeTuple.h>
#include <DataTypes/DataTypeNullable.h>
#include <Interpreters/Cache/FileCache.h>
#include <Interpreters/Cache/FileSegment.h>
#include <Interpreters/Cache/FileCacheFactory.h>
#include <Interpreters/Context.h>
#include <Disks/IDisk.h>
namespace DB
{
NamesAndTypesList StorageSystemFilesystemCache::getNamesAndTypes()
{
return {
{"cache_name", std::make_shared<DataTypeString>()},
{"cache_base_path", std::make_shared<DataTypeString>()},
{"cache_path", std::make_shared<DataTypeString>()},
{"key", std::make_shared<DataTypeString>()},
{"file_segment_range_begin", std::make_shared<DataTypeUInt64>()},
{"file_segment_range_end", std::make_shared<DataTypeUInt64>()},
{"size", std::make_shared<DataTypeUInt64>()},
{"state", std::make_shared<DataTypeString>()},
{"cache_hits", std::make_shared<DataTypeUInt64>()},
{"references", std::make_shared<DataTypeUInt64>()},
{"downloaded_size", std::make_shared<DataTypeUInt64>()},
{"kind", std::make_shared<DataTypeString>()},
{"unbound", std::make_shared<DataTypeNumber<UInt8>>()},
{"file_size", std::make_shared<DataTypeNullable>(std::make_shared<DataTypeUInt64>())},
};
}
StorageSystemFilesystemCache::StorageSystemFilesystemCache(const StorageID & table_id_)
: IStorageSystemOneBlock(table_id_)
{
}
void StorageSystemFilesystemCache::fillData(MutableColumns & res_columns, ContextPtr, const SelectQueryInfo &) const
{
auto caches = FileCacheFactory::instance().getAll();
for (const auto & [cache_name, cache_data] : caches)
{
const auto & cache = cache_data->cache;
const auto file_segments = cache->getSnapshot();
for (const auto & file_segment : file_segments)
{
size_t i = 0;
res_columns[i++]->insert(cache_name);
res_columns[i++]->insert(cache->getBasePath());
/// Do not use `file_segment->getPathInLocalCache` here because it will lead to nullptr dereference
/// (because file_segments in getSnapshot doesn't have `cache` field set)
const auto path = cache->getPathInLocalCache(file_segment->key(), file_segment->offset(), file_segment->getKind());
res_columns[i++]->insert(path);
res_columns[i++]->insert(file_segment->key().toString());
const auto & range = file_segment->range();
res_columns[i++]->insert(range.left);
res_columns[i++]->insert(range.right);
res_columns[i++]->insert(range.size());
res_columns[i++]->insert(FileSegment::stateToString(file_segment->state()));
res_columns[i++]->insert(file_segment->getHitsCount());
res_columns[i++]->insert(file_segment->getRefCount());
res_columns[i++]->insert(file_segment->getDownloadedSize());
res_columns[i++]->insert(toString(file_segment->getKind()));
res_columns[i++]->insert(file_segment->isUnbound());
try
{
if (fs::exists(path))
res_columns[i++]->insert(fs::file_size(path));
else
res_columns[i++]->insertDefault();
}
catch (...)
{
res_columns[i++]->insertDefault();
}
}
}
}
}
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