ClickHouse/src/Storages/StorageS3.cpp

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#include "config.h"
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#include <Common/ProfileEvents.h>
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#include "IO/ParallelReadBuffer.h"
#include "IO/IOThreadPool.h"
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#include "Parsers/ASTCreateQuery.h"
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#if USE_AWS_S3
#include <Common/isValidUTF8.h>
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#include <Functions/FunctionsConversion.h>
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#include <IO/S3Common.h>
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#include <Interpreters/TreeRewriter.h>
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#include <Interpreters/evaluateConstantExpression.h>
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#include <Parsers/ASTFunction.h>
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#include <Parsers/ASTInsertQuery.h>
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#include <Storages/StorageFactory.h>
#include <Storages/StorageS3.h>
#include <Storages/StorageS3Settings.h>
#include <Storages/StorageSnapshot.h>
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#include <Storages/PartitionedSink.h>
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#include <Storages/VirtualColumnUtils.h>
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#include <Storages/getVirtualsForStorage.h>
#include <Storages/checkAndGetLiteralArgument.h>
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#include <Storages/StorageURL.h>
#include <Storages/NamedCollectionsHelpers.h>
#include <Common/NamedCollections/NamedCollections.h>
#include <Storages/ReadFromStorageProgress.h>
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#include <Disks/IO/AsynchronousReadIndirectBufferFromRemoteFS.h>
#include <Disks/IO/ReadBufferFromRemoteFSGather.h>
#include <Disks/ObjectStorages/StoredObject.h>
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#include <IO/ReadBufferFromS3.h>
#include <IO/WriteBufferFromS3.h>
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#include <Formats/FormatFactory.h>
#include <Formats/ReadSchemaUtils.h>
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#include <Processors/Transforms/AddingDefaultsTransform.h>
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#include <Processors/Formats/IOutputFormat.h>
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#include <Processors/Formats/IInputFormat.h>
#include <QueryPipeline/narrowPipe.h>
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#include <QueryPipeline/QueryPipelineBuilder.h>
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#include <DataTypes/DataTypeString.h>
#include <aws/core/auth/AWSCredentials.h>
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#include <aws/s3/S3Client.h>
#include <aws/s3/model/ListObjectsV2Request.h>
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#include <aws/s3/model/CopyObjectRequest.h>
#include <aws/s3/model/DeleteObjectsRequest.h>
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#include <Common/parseGlobs.h>
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#include <Common/quoteString.h>
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#include <re2/re2.h>
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#include <Processors/ISource.h>
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#include <Processors/Sinks/SinkToStorage.h>
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#include <QueryPipeline/Pipe.h>
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#include <filesystem>
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namespace fs = std::filesystem;
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namespace ProfileEvents
{
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extern const Event S3DeleteObjects;
extern const Event S3ListObjects;
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}
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namespace DB
{
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static const String PARTITION_ID_WILDCARD = "{_partition_id}";
static const std::unordered_set<std::string_view> required_configuration_keys = {
"url",
};
static const std::unordered_set<std::string_view> optional_configuration_keys = {
"format",
"compression",
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"compression_method",
"structure",
"access_key_id",
"secret_access_key",
"filename",
"use_environment_credentials",
"max_single_read_retries",
"min_upload_part_size",
"upload_part_size_multiply_factor",
"upload_part_size_multiply_parts_count_threshold",
"max_single_part_upload_size",
"max_connections",
};
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namespace ErrorCodes
{
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extern const int CANNOT_PARSE_TEXT;
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extern const int BAD_ARGUMENTS;
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extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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extern const int S3_ERROR;
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extern const int UNEXPECTED_EXPRESSION;
extern const int DATABASE_ACCESS_DENIED;
extern const int CANNOT_EXTRACT_TABLE_STRUCTURE;
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extern const int NOT_IMPLEMENTED;
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}
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class IOutputFormat;
using OutputFormatPtr = std::shared_ptr<IOutputFormat>;
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static void addPathToVirtualColumns(Block & block, const String & path, size_t idx)
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{
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if (block.has("_path"))
block.getByName("_path").column->assumeMutableRef().insert(path);
if (block.has("_file"))
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{
auto pos = path.find_last_of('/');
assert(pos != std::string::npos);
auto file = path.substr(pos + 1);
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block.getByName("_file").column->assumeMutableRef().insert(file);
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}
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block.getByName("_idx").column->assumeMutableRef().insert(idx);
}
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class StorageS3Source::DisclosedGlobIterator::Impl : WithContext
{
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public:
Impl(
const Aws::S3::S3Client & client_,
const S3::URI & globbed_uri_,
ASTPtr & query_,
const Block & virtual_header_,
ContextPtr context_,
ObjectInfos * object_infos_,
Strings * read_keys_,
const S3Settings::RequestSettings & request_settings_)
: WithContext(context_)
, client(client_)
, globbed_uri(globbed_uri_)
, query(query_)
, virtual_header(virtual_header_)
, object_infos(object_infos_)
, read_keys(read_keys_)
, request_settings(request_settings_)
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, list_objects_pool(1)
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, list_objects_scheduler(threadPoolCallbackRunner<ListObjectsOutcome>(list_objects_pool, "ListObjects"))
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{
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if (globbed_uri.bucket.find_first_of("*?{") != globbed_uri.bucket.npos)
throw Exception("Expression can not have wildcards inside bucket name", ErrorCodes::UNEXPECTED_EXPRESSION);
const String key_prefix = globbed_uri.key.substr(0, globbed_uri.key.find_first_of("*?{"));
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/// We don't have to list bucket, because there is no asterisks.
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if (key_prefix.size() == globbed_uri.key.size())
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{
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buffer.emplace_back(globbed_uri.key, std::nullopt);
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buffer_iter = buffer.begin();
is_finished = true;
return;
}
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request.SetBucket(globbed_uri.bucket);
request.SetPrefix(key_prefix);
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outcome_future = listObjectsAsync();
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matcher = std::make_unique<re2::RE2>(makeRegexpPatternFromGlobs(globbed_uri.key));
recursive = globbed_uri.key == "/**" ? true : false;
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fillInternalBufferAssumeLocked();
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}
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KeyWithInfo next()
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{
std::lock_guard lock(mutex);
return nextAssumeLocked();
}
size_t getTotalSize() const
{
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return total_size.load(std::memory_order_relaxed);
}
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~Impl()
{
list_objects_pool.wait();
}
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private:
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using ListObjectsOutcome = Aws::S3::Model::ListObjectsV2Outcome;
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KeyWithInfo nextAssumeLocked()
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{
if (buffer_iter != buffer.end())
{
auto answer = *buffer_iter;
++buffer_iter;
return answer;
}
if (is_finished)
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return {};
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fillInternalBufferAssumeLocked();
return nextAssumeLocked();
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}
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void fillInternalBufferAssumeLocked()
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{
buffer.clear();
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assert(outcome_future.valid());
auto outcome = outcome_future.get();
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if (!outcome.IsSuccess())
throw Exception(ErrorCodes::S3_ERROR, "Could not list objects in bucket {} with prefix {}, S3 exception: {}, message: {}",
quoteString(request.GetBucket()), quoteString(request.GetPrefix()),
backQuote(outcome.GetError().GetExceptionName()), quoteString(outcome.GetError().GetMessage()));
const auto & result_batch = outcome.GetResult().GetContents();
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/// It returns false when all objects were returned
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is_finished = !outcome.GetResult().GetIsTruncated();
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if (!is_finished)
{
/// Even if task is finished the thread may be not freed in pool.
/// So wait until it will be freed before scheduling a new task.
list_objects_pool.wait();
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outcome_future = listObjectsAsync();
}
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KeysWithInfo temp_buffer;
temp_buffer.reserve(result_batch.size());
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for (const auto & row : result_batch)
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{
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String key = row.GetKey();
if (recursive || re2::RE2::FullMatch(key, *matcher))
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{
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S3::ObjectInfo info =
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{
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.size = size_t(row.GetSize()),
.last_modification_time = row.GetLastModified().Millis() / 1000,
};
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if (object_infos)
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(*object_infos)[fs::path(globbed_uri.bucket) / key] = info;
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temp_buffer.emplace_back(std::move(key), std::move(info));
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}
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}
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if (temp_buffer.empty())
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{
buffer_iter = buffer.begin();
return;
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}
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if (!is_initialized)
{
createFilterAST(temp_buffer.front().key);
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is_initialized = true;
}
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if (filter_ast)
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{
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auto block = virtual_header.cloneEmpty();
for (size_t i = 0; i < temp_buffer.size(); ++i)
addPathToVirtualColumns(block, fs::path(globbed_uri.bucket) / temp_buffer[i].key, i);
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VirtualColumnUtils::filterBlockWithQuery(query, block, getContext(), filter_ast);
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const auto & idxs = typeid_cast<const ColumnUInt64 &>(*block.getByName("_idx").column);
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buffer.reserve(block.rows());
for (UInt64 idx : idxs.getData())
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{
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total_size.fetch_add(temp_buffer[idx].info->size, std::memory_order_relaxed);
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buffer.emplace_back(std::move(temp_buffer[idx]));
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}
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}
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else
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{
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buffer = std::move(temp_buffer);
for (const auto & [_, info] : buffer)
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total_size.fetch_add(info->size, std::memory_order_relaxed);
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}
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/// Set iterator only after the whole batch is processed
buffer_iter = buffer.begin();
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if (read_keys)
{
read_keys->reserve(read_keys->size() + buffer.size());
for (const auto & [key, _] : buffer)
read_keys->push_back(key);
}
}
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void createFilterAST(const String & any_key)
{
if (!query || !virtual_header)
return;
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/// Create a virtual block with one row to construct filter
/// Append "idx" column as the filter result
virtual_header.insert({ColumnUInt64::create(), std::make_shared<DataTypeUInt64>(), "_idx"});
auto block = virtual_header.cloneEmpty();
addPathToVirtualColumns(block, fs::path(globbed_uri.bucket) / any_key, 0);
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VirtualColumnUtils::prepareFilterBlockWithQuery(query, getContext(), block, filter_ast);
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}
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std::future<ListObjectsOutcome> listObjectsAsync()
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{
return list_objects_scheduler([this]
{
ProfileEvents::increment(ProfileEvents::S3ListObjects);
auto outcome = client.ListObjectsV2(request);
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/// Outcome failure will be handled on the caller side.
if (outcome.IsSuccess())
request.SetContinuationToken(outcome.GetResult().GetNextContinuationToken());
return outcome;
}, 0);
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}
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std::mutex mutex;
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KeysWithInfo buffer;
KeysWithInfo::iterator buffer_iter;
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Aws::S3::S3Client client;
S3::URI globbed_uri;
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ASTPtr query;
Block virtual_header;
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bool is_initialized{false};
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ASTPtr filter_ast;
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std::unique_ptr<re2::RE2> matcher;
bool recursive{false};
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bool is_finished{false};
ObjectInfos * object_infos;
Strings * read_keys;
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Aws::S3::Model::ListObjectsV2Request request;
S3Settings::RequestSettings request_settings;
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ThreadPool list_objects_pool;
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ThreadPoolCallbackRunner<ListObjectsOutcome> list_objects_scheduler;
std::future<ListObjectsOutcome> outcome_future;
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std::atomic<size_t> total_size = 0;
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};
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StorageS3Source::DisclosedGlobIterator::DisclosedGlobIterator(
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const Aws::S3::S3Client & client_,
const S3::URI & globbed_uri_,
ASTPtr query,
const Block & virtual_header,
ContextPtr context,
ObjectInfos * object_infos_,
Strings * read_keys_,
const S3Settings::RequestSettings & request_settings_)
: pimpl(std::make_shared<StorageS3Source::DisclosedGlobIterator::Impl>(client_, globbed_uri_, query, virtual_header, context, object_infos_, read_keys_, request_settings_))
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{
}
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StorageS3Source::KeyWithInfo StorageS3Source::DisclosedGlobIterator::next()
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{
return pimpl->next();
}
size_t StorageS3Source::DisclosedGlobIterator::getTotalSize() const
{
return pimpl->getTotalSize();
}
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class StorageS3Source::KeysIterator::Impl : WithContext
{
public:
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explicit Impl(
const Aws::S3::S3Client & client_,
const std::string & version_id_,
const std::vector<String> & keys_,
const String & bucket_,
ASTPtr query_,
const Block & virtual_header_,
ContextPtr context_,
ObjectInfos * object_infos_,
Strings * read_keys_)
: WithContext(context_)
, bucket(bucket_)
, query(query_)
, virtual_header(virtual_header_)
{
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Strings all_keys = keys_;
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/// Create a virtual block with one row to construct filter
if (query && virtual_header && !all_keys.empty())
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{
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/// Append "idx" column as the filter result
virtual_header.insert({ColumnUInt64::create(), std::make_shared<DataTypeUInt64>(), "_idx"});
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auto block = virtual_header.cloneEmpty();
addPathToVirtualColumns(block, fs::path(bucket) / all_keys.front(), 0);
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ASTPtr filter_ast;
VirtualColumnUtils::prepareFilterBlockWithQuery(query, getContext(), block, filter_ast);
if (filter_ast)
{
block = virtual_header.cloneEmpty();
for (size_t i = 0; i < all_keys.size(); ++i)
addPathToVirtualColumns(block, fs::path(bucket) / all_keys[i], i);
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VirtualColumnUtils::filterBlockWithQuery(query, block, getContext(), filter_ast);
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const auto & idxs = typeid_cast<const ColumnUInt64 &>(*block.getByName("_idx").column);
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Strings filtered_keys;
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filtered_keys.reserve(block.rows());
for (UInt64 idx : idxs.getData())
filtered_keys.emplace_back(std::move(all_keys[idx]));
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all_keys = std::move(filtered_keys);
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}
}
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if (read_keys_)
*read_keys_ = all_keys;
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for (auto && key : all_keys)
{
std::optional<S3::ObjectInfo> info;
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/// To avoid extra requests update total_size only if object_infos != nullptr
/// (which means we eventually need this info anyway, so it should be ok to do it now)
if (object_infos_)
{
info = S3::getObjectInfo(client_, bucket, key, version_id_, true, false);
total_size += info->size;
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String path = fs::path(bucket) / key;
(*object_infos_)[std::move(path)] = *info;
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}
keys.emplace_back(std::move(key), std::move(info));
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}
}
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KeyWithInfo next()
{
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size_t current_index = index.fetch_add(1, std::memory_order_relaxed);
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if (current_index >= keys.size())
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return {};
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return keys[current_index];
}
size_t getTotalSize() const
{
return total_size;
}
private:
KeysWithInfo keys;
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std::atomic_size_t index = 0;
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String bucket;
ASTPtr query;
Block virtual_header;
size_t total_size = 0;
};
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StorageS3Source::KeysIterator::KeysIterator(
const Aws::S3::S3Client & client_,
const std::string & version_id_,
const std::vector<String> & keys_,
const String & bucket_,
ASTPtr query,
const Block & virtual_header,
ContextPtr context,
ObjectInfos * object_infos,
Strings * read_keys)
: pimpl(std::make_shared<StorageS3Source::KeysIterator::Impl>(
client_, version_id_, keys_, bucket_, query,
virtual_header, context, object_infos, read_keys))
{
}
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StorageS3Source::KeyWithInfo StorageS3Source::KeysIterator::next()
{
return pimpl->next();
}
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size_t StorageS3Source::KeysIterator::getTotalSize() const
{
return pimpl->getTotalSize();
}
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Block StorageS3Source::getHeader(Block sample_block, const std::vector<NameAndTypePair> & requested_virtual_columns)
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{
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for (const auto & virtual_column : requested_virtual_columns)
sample_block.insert({virtual_column.type->createColumn(), virtual_column.type, virtual_column.name});
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return sample_block;
}
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StorageS3Source::StorageS3Source(
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const std::vector<NameAndTypePair> & requested_virtual_columns_,
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const String & format_,
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String name_,
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const Block & sample_block_,
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ContextPtr context_,
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std::optional<FormatSettings> format_settings_,
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const ColumnsDescription & columns_,
UInt64 max_block_size_,
const S3Settings::RequestSettings & request_settings_,
String compression_hint_,
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const std::shared_ptr<const Aws::S3::S3Client> & client_,
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const String & bucket_,
const String & version_id_,
std::shared_ptr<IIterator> file_iterator_,
const size_t download_thread_num_)
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: ISource(getHeader(sample_block_, requested_virtual_columns_))
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, WithContext(context_)
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, name(std::move(name_))
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, bucket(bucket_)
, version_id(version_id_)
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, format(format_)
, columns_desc(columns_)
, max_block_size(max_block_size_)
, request_settings(request_settings_)
, compression_hint(std::move(compression_hint_))
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, client(client_)
, sample_block(sample_block_)
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, format_settings(format_settings_)
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, requested_virtual_columns(requested_virtual_columns_)
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, file_iterator(file_iterator_)
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, download_thread_num(download_thread_num_)
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, create_reader_pool(1)
, create_reader_scheduler(threadPoolCallbackRunner<ReaderHolder>(create_reader_pool, "CreateS3Reader"))
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{
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reader = createReader();
if (reader)
reader_future = createReaderAsync();
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}
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void StorageS3Source::onCancel()
{
std::lock_guard lock(reader_mutex);
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if (reader)
reader->cancel();
}
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StorageS3Source::ReaderHolder StorageS3Source::createReader()
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{
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auto [current_key, info] = (*file_iterator)();
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if (current_key.empty())
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return {};
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size_t object_size = info
? info->size
: S3::getObjectSize(*client, bucket, current_key, version_id, true, false);
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int zstd_window_log_max = static_cast<int>(getContext()->getSettingsRef().zstd_window_log_max);
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auto read_buf = wrapReadBufferWithCompressionMethod(
createS3ReadBuffer(current_key, object_size),
chooseCompressionMethod(current_key, compression_hint),
zstd_window_log_max);
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auto input_format = getContext()->getInputFormat(format, *read_buf, sample_block, max_block_size, format_settings);
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QueryPipelineBuilder builder;
builder.init(Pipe(input_format));
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if (columns_desc.hasDefaults())
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{
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builder.addSimpleTransform(
[&](const Block & header)
{ return std::make_shared<AddingDefaultsTransform>(header, columns_desc, *input_format, getContext()); });
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}
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auto pipeline = std::make_unique<QueryPipeline>(QueryPipelineBuilder::getPipeline(std::move(builder)));
auto current_reader = std::make_unique<PullingPipelineExecutor>(*pipeline);
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return ReaderHolder{fs::path(bucket) / current_key, std::move(read_buf), std::move(pipeline), std::move(current_reader)};
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}
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std::future<StorageS3Source::ReaderHolder> StorageS3Source::createReaderAsync()
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{
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return create_reader_scheduler([this] { return createReader(); }, 0);
}
std::unique_ptr<ReadBuffer> StorageS3Source::createS3ReadBuffer(const String & key, size_t object_size)
{
auto read_settings = getContext()->getReadSettings().adjustBufferSize(object_size);
read_settings.enable_filesystem_cache = false;
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auto download_buffer_size = getContext()->getSettings().max_download_buffer_size;
const bool use_parallel_download = download_buffer_size > 0 && download_thread_num > 1;
const bool object_too_small = object_size < download_thread_num * download_buffer_size;
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if (!use_parallel_download || object_too_small)
{
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LOG_TRACE(log, "Downloading object of size {} from S3 in single thread", object_size);
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if (read_settings.remote_fs_method == RemoteFSReadMethod::threadpool)
return createAsyncS3ReadBuffer(key, read_settings, object_size);
return std::make_unique<ReadBufferFromS3>(client, bucket, key, version_id, request_settings, read_settings);
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}
assert(object_size > 0);
if (download_buffer_size < DBMS_DEFAULT_BUFFER_SIZE)
{
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LOG_WARNING(log, "Downloading buffer {} bytes too small, set at least {} bytes", download_buffer_size, DBMS_DEFAULT_BUFFER_SIZE);
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download_buffer_size = DBMS_DEFAULT_BUFFER_SIZE;
}
auto factory = std::make_unique<ReadBufferS3Factory>(
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client, bucket, key, version_id, download_buffer_size, object_size, request_settings, read_settings);
LOG_TRACE(log,
"Downloading from S3 in {} threads. Object size: {}, Range size: {}.",
download_thread_num, object_size, download_buffer_size);
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return std::make_unique<ParallelReadBuffer>(std::move(factory), threadPoolCallbackRunner<void>(IOThreadPool::get(), "S3ParallelRead"), download_thread_num);
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}
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std::unique_ptr<ReadBuffer> StorageS3Source::createAsyncS3ReadBuffer(
const String & key, const ReadSettings & read_settings, size_t object_size)
{
auto read_buffer_creator =
[this, read_settings]
(const std::string & path, size_t read_until_position) -> std::shared_ptr<ReadBufferFromFileBase>
{
return std::make_shared<ReadBufferFromS3>(
client,
bucket,
path,
version_id,
request_settings,
read_settings,
/* use_external_buffer */true,
/* offset */0,
read_until_position,
/* restricted_seek */true);
};
auto s3_impl = std::make_unique<ReadBufferFromRemoteFSGather>(
std::move(read_buffer_creator),
StoredObjects{StoredObject{key, object_size}},
read_settings);
auto & pool_reader = getContext()->getThreadPoolReader(Context::FilesystemReaderType::ASYNCHRONOUS_REMOTE_FS_READER);
auto async_reader = std::make_unique<AsynchronousReadIndirectBufferFromRemoteFS>(pool_reader, read_settings, std::move(s3_impl));
async_reader->setReadUntilEnd();
if (read_settings.remote_fs_prefetch)
async_reader->prefetch();
return async_reader;
}
StorageS3Source::~StorageS3Source()
{
create_reader_pool.wait();
}
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String StorageS3Source::getName() const
{
return name;
}
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Chunk StorageS3Source::generate()
{
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while (true)
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{
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if (!reader || isCancelled())
break;
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Chunk chunk;
if (reader->pull(chunk))
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{
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UInt64 num_rows = chunk.getNumRows();
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const auto & file_path = reader.getPath();
size_t total_size = file_iterator->getTotalSize();
if (num_rows && total_size)
{
updateRowsProgressApprox(
*this, chunk, total_size, total_rows_approx_accumulated, total_rows_count_times, total_rows_approx_max);
}
for (const auto & virtual_column : requested_virtual_columns)
{
if (virtual_column.name == "_path")
{
chunk.addColumn(virtual_column.type->createColumnConst(num_rows, file_path)->convertToFullColumnIfConst());
}
else if (virtual_column.name == "_file")
{
size_t last_slash_pos = file_path.find_last_of('/');
auto column = virtual_column.type->createColumnConst(num_rows, file_path.substr(last_slash_pos + 1));
chunk.addColumn(column->convertToFullColumnIfConst());
}
}
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return chunk;
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}
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{
std::lock_guard lock(reader_mutex);
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assert(reader_future.valid());
reader = reader_future.get();
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if (!reader)
break;
/// Even if task is finished the thread may be not freed in pool.
/// So wait until it will be freed before scheduling a new task.
create_reader_pool.wait();
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reader_future = createReaderAsync();
}
}
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return {};
}
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class StorageS3Sink : public SinkToStorage
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{
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public:
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StorageS3Sink(
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const String & format,
const Block & sample_block_,
ContextPtr context,
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std::optional<FormatSettings> format_settings_,
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const CompressionMethod compression_method,
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const StorageS3::S3Configuration & s3_configuration_,
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const String & bucket,
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const String & key)
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: SinkToStorage(sample_block_)
, sample_block(sample_block_)
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, format_settings(format_settings_)
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{
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write_buf = wrapWriteBufferWithCompressionMethod(
std::make_unique<WriteBufferFromS3>(
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s3_configuration_.client,
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bucket,
key,
s3_configuration_.request_settings,
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std::nullopt,
DBMS_DEFAULT_BUFFER_SIZE,
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threadPoolCallbackRunner<void>(IOThreadPool::get(), "S3ParallelRead"),
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context->getWriteSettings()),
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compression_method,
3);
writer
= FormatFactory::instance().getOutputFormatParallelIfPossible(format, *write_buf, sample_block, context, format_settings);
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}
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String getName() const override { return "StorageS3Sink"; }
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void consume(Chunk chunk) override
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{
std::lock_guard lock(cancel_mutex);
if (cancelled)
return;
writer->write(getHeader().cloneWithColumns(chunk.detachColumns()));
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}
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void onCancel() override
{
std::lock_guard lock(cancel_mutex);
finalize();
cancelled = true;
}
void onException() override
{
std::lock_guard lock(cancel_mutex);
finalize();
}
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void onFinish() override
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{
std::lock_guard lock(cancel_mutex);
finalize();
}
private:
void finalize()
{
if (!writer)
return;
try
{
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writer->finalize();
writer->flush();
write_buf->finalize();
}
catch (...)
{
/// Stop ParallelFormattingOutputFormat correctly.
writer.reset();
throw;
}
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}
2019-05-31 07:27:14 +00:00
2021-04-12 17:07:01 +00:00
Block sample_block;
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std::optional<FormatSettings> format_settings;
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std::unique_ptr<WriteBuffer> write_buf;
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OutputFormatPtr writer;
bool cancelled = false;
std::mutex cancel_mutex;
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};
2019-05-23 09:03:39 +00:00
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class PartitionedStorageS3Sink : public PartitionedSink
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{
public:
PartitionedStorageS3Sink(
const ASTPtr & partition_by,
const String & format_,
const Block & sample_block_,
ContextPtr context_,
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std::optional<FormatSettings> format_settings_,
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const CompressionMethod compression_method_,
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const StorageS3::S3Configuration & s3_configuration_,
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const String & bucket_,
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const String & key_)
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: PartitionedSink(partition_by, context_, sample_block_)
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, format(format_)
, sample_block(sample_block_)
, context(context_)
, compression_method(compression_method_)
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, s3_configuration(s3_configuration_)
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, bucket(bucket_)
, key(key_)
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, format_settings(format_settings_)
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{
}
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SinkPtr createSinkForPartition(const String & partition_id) override
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{
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auto partition_bucket = replaceWildcards(bucket, partition_id);
validateBucket(partition_bucket);
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auto partition_key = replaceWildcards(key, partition_id);
validateKey(partition_key);
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return std::make_shared<StorageS3Sink>(
format,
sample_block,
context,
format_settings,
compression_method,
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s3_configuration,
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partition_bucket,
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partition_key
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);
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}
private:
const String format;
const Block sample_block;
ContextPtr context;
const CompressionMethod compression_method;
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const StorageS3::S3Configuration & s3_configuration;
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const String bucket;
const String key;
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std::optional<FormatSettings> format_settings;
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ExpressionActionsPtr partition_by_expr;
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static void validateBucket(const String & str)
{
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S3::URI::validateBucket(str, {});
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if (!DB::UTF8::isValidUTF8(reinterpret_cast<const UInt8 *>(str.data()), str.size()))
throw Exception(ErrorCodes::CANNOT_PARSE_TEXT, "Incorrect non-UTF8 sequence in bucket name");
validatePartitionKey(str, false);
}
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static void validateKey(const String & str)
{
/// See:
/// - https://docs.aws.amazon.com/AmazonS3/latest/userguide/object-keys.html
/// - https://cloud.ibm.com/apidocs/cos/cos-compatibility#putobject
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if (str.empty() || str.size() > 1024)
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Incorrect key length (not empty, max 1023 characters), got: {}", str.size());
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if (!DB::UTF8::isValidUTF8(reinterpret_cast<const UInt8 *>(str.data()), str.size()))
throw Exception(ErrorCodes::CANNOT_PARSE_TEXT, "Incorrect non-UTF8 sequence in key");
validatePartitionKey(str, true);
}
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};
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StorageS3::StorageS3(
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const StorageS3Configuration & configuration_,
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const StorageID & table_id_,
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const ColumnsDescription & columns_,
const ConstraintsDescription & constraints_,
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const String & comment,
ContextPtr context_,
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std::optional<FormatSettings> format_settings_,
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bool distributed_processing_,
ASTPtr partition_by_)
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: IStorage(table_id_)
, s3_configuration{configuration_.url, configuration_.auth_settings, configuration_.request_settings, configuration_.headers}
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, keys({s3_configuration.uri.key})
, format_name(configuration_.format)
, compression_method(configuration_.compression_method)
, name(s3_configuration.uri.storage_name)
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, distributed_processing(distributed_processing_)
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, format_settings(format_settings_)
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, partition_by(partition_by_)
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, is_key_with_globs(s3_configuration.uri.key.find_first_of("*?{") != std::string::npos)
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{
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FormatFactory::instance().checkFormatName(format_name);
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context_->getGlobalContext()->getRemoteHostFilter().checkURL(s3_configuration.uri.uri);
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StorageInMemoryMetadata storage_metadata;
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updateS3Configuration(context_, s3_configuration);
if (columns_.empty())
{
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auto columns = getTableStructureFromDataImpl(
format_name,
s3_configuration,
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compression_method,
distributed_processing_,
is_key_with_globs,
format_settings,
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context_,
&object_infos);
storage_metadata.setColumns(columns);
}
else
storage_metadata.setColumns(columns_);
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storage_metadata.setConstraints(constraints_);
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storage_metadata.setComment(comment);
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setInMemoryMetadata(storage_metadata);
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auto default_virtuals = NamesAndTypesList{
{"_path", std::make_shared<DataTypeLowCardinality>(std::make_shared<DataTypeString>())},
{"_file", std::make_shared<DataTypeLowCardinality>(std::make_shared<DataTypeString>())}};
auto columns = storage_metadata.getSampleBlock().getNamesAndTypesList();
virtual_columns = getVirtualsForStorage(columns, default_virtuals);
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for (const auto & column : virtual_columns)
virtual_block.insert({column.type->createColumn(), column.type, column.name});
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}
std::shared_ptr<StorageS3Source::IIterator> StorageS3::createFileIterator(
const S3Configuration & s3_configuration,
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const std::vector<String> & keys,
bool is_key_with_globs,
bool distributed_processing,
ContextPtr local_context,
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ASTPtr query,
const Block & virtual_block,
ObjectInfos * object_infos,
Strings * read_keys)
{
if (distributed_processing)
{
return std::make_shared<StorageS3Source::ReadTaskIterator>(local_context->getReadTaskCallback());
}
else if (is_key_with_globs)
{
/// Iterate through disclosed globs and make a source for each file
return std::make_shared<StorageS3Source::DisclosedGlobIterator>(
*s3_configuration.client, s3_configuration.uri, query, virtual_block,
local_context, object_infos, read_keys, s3_configuration.request_settings);
}
else
{
return std::make_shared<StorageS3Source::KeysIterator>(
*s3_configuration.client, s3_configuration.uri.version_id, keys,
s3_configuration.uri.bucket, query, virtual_block, local_context,
object_infos, read_keys);
}
}
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bool StorageS3::supportsSubcolumns() const
{
return FormatFactory::instance().checkIfFormatSupportsSubcolumns(format_name);
}
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bool StorageS3::supportsSubsetOfColumns() const
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{
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return FormatFactory::instance().checkIfFormatSupportsSubsetOfColumns(format_name);
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}
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Pipe StorageS3::read(
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const Names & column_names,
const StorageSnapshotPtr & storage_snapshot,
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SelectQueryInfo & query_info,
ContextPtr local_context,
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QueryProcessingStage::Enum /*processed_stage*/,
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size_t max_block_size,
size_t num_streams)
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{
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bool has_wildcards = s3_configuration.uri.bucket.find(PARTITION_ID_WILDCARD) != String::npos
|| keys.back().find(PARTITION_ID_WILDCARD) != String::npos;
if (partition_by && has_wildcards)
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Reading from a partitioned S3 storage is not implemented yet");
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updateS3Configuration(local_context, s3_configuration);
Pipes pipes;
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std::unordered_set<String> column_names_set(column_names.begin(), column_names.end());
std::vector<NameAndTypePair> requested_virtual_columns;
for (const auto & virtual_column : getVirtuals())
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{
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if (column_names_set.contains(virtual_column.name))
requested_virtual_columns.push_back(virtual_column);
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}
std::shared_ptr<StorageS3Source::IIterator> iterator_wrapper = createFileIterator(
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s3_configuration,
keys,
is_key_with_globs,
distributed_processing,
local_context,
query_info.query,
virtual_block,
&object_infos);
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ColumnsDescription columns_description;
Block block_for_format;
if (supportsSubsetOfColumns())
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{
auto fetch_columns = column_names;
const auto & virtuals = getVirtuals();
std::erase_if(
fetch_columns,
[&](const String & col)
{ return std::any_of(virtuals.begin(), virtuals.end(), [&](const NameAndTypePair & virtual_col){ return col == virtual_col.name; }); });
if (fetch_columns.empty())
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fetch_columns.push_back(ExpressionActions::getSmallestColumn(storage_snapshot->metadata->getColumns().getAllPhysical()).name);
columns_description = storage_snapshot->getDescriptionForColumns(fetch_columns);
block_for_format = storage_snapshot->getSampleBlockForColumns(columns_description.getNamesOfPhysical());
}
else
{
columns_description = storage_snapshot->metadata->getColumns();
block_for_format = storage_snapshot->metadata->getSampleBlock();
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}
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const size_t max_download_threads = local_context->getSettingsRef().max_download_threads;
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for (size_t i = 0; i < num_streams; ++i)
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{
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pipes.emplace_back(std::make_shared<StorageS3Source>(
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requested_virtual_columns,
format_name,
getName(),
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block_for_format,
local_context,
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format_settings,
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columns_description,
max_block_size,
s3_configuration.request_settings,
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compression_method,
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s3_configuration.client,
s3_configuration.uri.bucket,
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s3_configuration.uri.version_id,
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iterator_wrapper,
max_download_threads));
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}
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auto pipe = Pipe::unitePipes(std::move(pipes));
narrowPipe(pipe, num_streams);
return pipe;
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}
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SinkToStoragePtr StorageS3::write(const ASTPtr & query, const StorageMetadataPtr & metadata_snapshot, ContextPtr local_context)
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{
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updateS3Configuration(local_context, s3_configuration);
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auto sample_block = metadata_snapshot->getSampleBlock();
auto chosen_compression_method = chooseCompressionMethod(keys.back(), compression_method);
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bool has_wildcards = s3_configuration.uri.bucket.find(PARTITION_ID_WILDCARD) != String::npos || keys.back().find(PARTITION_ID_WILDCARD) != String::npos;
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auto insert_query = std::dynamic_pointer_cast<ASTInsertQuery>(query);
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auto partition_by_ast = insert_query ? (insert_query->partition_by ? insert_query->partition_by : partition_by) : nullptr;
bool is_partitioned_implementation = partition_by_ast && has_wildcards;
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if (is_partitioned_implementation)
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{
return std::make_shared<PartitionedStorageS3Sink>(
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partition_by_ast,
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format_name,
sample_block,
local_context,
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format_settings,
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chosen_compression_method,
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s3_configuration,
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s3_configuration.uri.bucket,
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keys.back());
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}
else
{
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if (is_key_with_globs)
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throw Exception(ErrorCodes::DATABASE_ACCESS_DENIED, "S3 key '{}' contains globs, so the table is in readonly mode", s3_configuration.uri.key);
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bool truncate_in_insert = local_context->getSettingsRef().s3_truncate_on_insert;
if (!truncate_in_insert && S3::objectExists(*s3_configuration.client, s3_configuration.uri.bucket, keys.back(), s3_configuration.uri.version_id))
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{
if (local_context->getSettingsRef().s3_create_new_file_on_insert)
{
size_t index = keys.size();
auto pos = keys[0].find_first_of('.');
String new_key;
do
{
new_key = keys[0].substr(0, pos) + "." + std::to_string(index) + (pos == std::string::npos ? "" : keys[0].substr(pos));
++index;
}
while (S3::objectExists(*s3_configuration.client, s3_configuration.uri.bucket, new_key, s3_configuration.uri.version_id));
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keys.push_back(new_key);
}
else
throw Exception(
ErrorCodes::BAD_ARGUMENTS,
"Object in bucket {} with key {} already exists. If you want to overwrite it, enable setting s3_truncate_on_insert, if you "
"want to create a new file on each insert, enable setting s3_create_new_file_on_insert",
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s3_configuration.uri.bucket,
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keys.back());
}
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return std::make_shared<StorageS3Sink>(
format_name,
sample_block,
local_context,
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format_settings,
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chosen_compression_method,
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s3_configuration,
s3_configuration.uri.bucket,
keys.back());
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}
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}
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void StorageS3::truncate(const ASTPtr & /* query */, const StorageMetadataPtr &, ContextPtr local_context, TableExclusiveLockHolder &)
{
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updateS3Configuration(local_context, s3_configuration);
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if (is_key_with_globs)
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throw Exception(ErrorCodes::DATABASE_ACCESS_DENIED, "S3 key '{}' contains globs, so the table is in readonly mode", s3_configuration.uri.key);
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Aws::S3::Model::Delete delkeys;
for (const auto & key : keys)
{
Aws::S3::Model::ObjectIdentifier obj;
obj.SetKey(key);
delkeys.AddObjects(std::move(obj));
}
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ProfileEvents::increment(ProfileEvents::S3DeleteObjects);
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Aws::S3::Model::DeleteObjectsRequest request;
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request.SetBucket(s3_configuration.uri.bucket);
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request.SetDelete(delkeys);
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auto response = s3_configuration.client->DeleteObjects(request);
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if (!response.IsSuccess())
{
const auto & err = response.GetError();
throw Exception(std::to_string(static_cast<int>(err.GetErrorType())) + ": " + err.GetMessage(), ErrorCodes::S3_ERROR);
}
}
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void StorageS3::updateS3Configuration(ContextPtr ctx, StorageS3::S3Configuration & upd)
{
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auto settings = ctx->getStorageS3Settings().getSettings(upd.uri.uri.toString());
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upd.request_settings = settings.request_settings;
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upd.request_settings.updateFromSettings(ctx->getSettings());
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if (upd.client)
{
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if (upd.static_configuration)
return;
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if (settings.auth_settings == upd.auth_settings)
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return;
}
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upd.auth_settings.updateFrom(settings.auth_settings);
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S3::PocoHTTPClientConfiguration client_configuration = S3::ClientFactory::instance().createClientConfiguration(
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upd.auth_settings.region,
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ctx->getRemoteHostFilter(),
static_cast<unsigned>(ctx->getGlobalContext()->getSettingsRef().s3_max_redirects),
ctx->getGlobalContext()->getSettingsRef().enable_s3_requests_logging,
/* for_disk_s3 = */ false,
upd.request_settings.get_request_throttler,
upd.request_settings.put_request_throttler);
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client_configuration.endpointOverride = upd.uri.endpoint;
client_configuration.maxConnections = static_cast<unsigned>(upd.request_settings.max_connections);
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auto credentials = Aws::Auth::AWSCredentials(upd.auth_settings.access_key_id, upd.auth_settings.secret_access_key);
auto headers = upd.auth_settings.headers;
if (!upd.headers_from_ast.empty())
headers.insert(headers.end(), upd.headers_from_ast.begin(), upd.headers_from_ast.end());
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upd.client = S3::ClientFactory::instance().create(
client_configuration,
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upd.uri.is_virtual_hosted_style,
credentials.GetAWSAccessKeyId(),
credentials.GetAWSSecretKey(),
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upd.auth_settings.server_side_encryption_customer_key_base64,
std::move(headers),
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upd.auth_settings.use_environment_credentials.value_or(ctx->getConfigRef().getBool("s3.use_environment_credentials", false)),
upd.auth_settings.use_insecure_imds_request.value_or(ctx->getConfigRef().getBool("s3.use_insecure_imds_request", false)));
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}
void StorageS3::processNamedCollectionResult(StorageS3Configuration & configuration, const NamedCollection & collection)
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{
validateNamedCollection(collection, required_configuration_keys, optional_configuration_keys);
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configuration.url = collection.get<String>("url");
auto filename = collection.getOrDefault<String>("filename", "");
if (!filename.empty())
configuration.url = std::filesystem::path(configuration.url) / filename;
configuration.auth_settings.access_key_id = collection.getOrDefault<String>("access_key_id", "");
configuration.auth_settings.secret_access_key = collection.getOrDefault<String>("secret_access_key", "");
configuration.auth_settings.use_environment_credentials = collection.getOrDefault<UInt64>("use_environment_credentials", 0);
configuration.format = collection.getOrDefault<String>("format", "auto");
configuration.compression_method = collection.getOrDefault<String>("compression_method", collection.getOrDefault<String>("compression", "auto"));
configuration.structure = collection.getOrDefault<String>("structure", "auto");
configuration.request_settings = S3Settings::RequestSettings(collection);
}
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StorageS3Configuration StorageS3::getConfiguration(ASTs & engine_args, ContextPtr local_context)
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{
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StorageS3Configuration configuration;
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if (auto named_collection = tryGetNamedCollectionWithOverrides(engine_args))
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{
processNamedCollectionResult(configuration, *named_collection);
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}
else
{
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/// Supported signatures:
///
/// S3('url')
/// S3('url', 'format')
/// S3('url', 'format', 'compression')
/// S3('url', 'aws_access_key_id', 'aws_secret_access_key', 'format')
/// S3('url', 'aws_access_key_id', 'aws_secret_access_key', 'format', 'compression')
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if (engine_args.empty() || engine_args.size() > 5)
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throw Exception(
"Storage S3 requires 1 to 5 arguments: url, [access_key_id, secret_access_key], name of used format and [compression_method].",
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ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
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auto * header_it = StorageURL::collectHeaders(engine_args, configuration.headers, local_context);
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if (header_it != engine_args.end())
engine_args.erase(header_it);
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for (auto & engine_arg : engine_args)
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engine_arg = evaluateConstantExpressionOrIdentifierAsLiteral(engine_arg, local_context);
configuration.url = checkAndGetLiteralArgument<String>(engine_args[0], "url");
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if (engine_args.size() >= 4)
{
configuration.auth_settings.access_key_id = checkAndGetLiteralArgument<String>(engine_args[1], "access_key_id");
configuration.auth_settings.secret_access_key = checkAndGetLiteralArgument<String>(engine_args[2], "secret_access_key");
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}
if (engine_args.size() == 3 || engine_args.size() == 5)
{
configuration.compression_method = checkAndGetLiteralArgument<String>(engine_args.back(), "compression_method");
configuration.format = checkAndGetLiteralArgument<String>(engine_args[engine_args.size() - 2], "format");
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}
else if (engine_args.size() != 1)
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{
configuration.compression_method = "auto";
configuration.format = checkAndGetLiteralArgument<String>(engine_args.back(), "format");
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}
}
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if (configuration.format == "auto")
configuration.format = FormatFactory::instance().getFormatFromFileName(configuration.url, true);
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return configuration;
}
ColumnsDescription StorageS3::getTableStructureFromData(
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const StorageS3Configuration & configuration,
bool distributed_processing,
const std::optional<FormatSettings> & format_settings,
ContextPtr ctx,
ObjectInfos * object_infos)
{
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S3Configuration s3_configuration{
configuration.url,
configuration.auth_settings,
S3Settings::RequestSettings(ctx->getSettingsRef()),
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configuration.headers};
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updateS3Configuration(ctx, s3_configuration);
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return getTableStructureFromDataImpl(
configuration.format, s3_configuration, configuration.compression_method, distributed_processing,
s3_configuration.uri.key.find_first_of("*?{") != std::string::npos, format_settings, ctx, object_infos);
}
ColumnsDescription StorageS3::getTableStructureFromDataImpl(
const String & format,
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const S3Configuration & s3_configuration,
const String & compression_method,
bool distributed_processing,
bool is_key_with_globs,
const std::optional<FormatSettings> & format_settings,
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ContextPtr ctx,
ObjectInfos * object_infos)
{
std::vector<String> read_keys;
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auto file_iterator = createFileIterator(
s3_configuration,
{s3_configuration.uri.key},
is_key_with_globs,
distributed_processing,
ctx, nullptr,
{}, object_infos, &read_keys);
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std::optional<ColumnsDescription> columns_from_cache;
size_t prev_read_keys_size = read_keys.size();
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if (ctx->getSettingsRef().schema_inference_use_cache_for_s3)
columns_from_cache = tryGetColumnsFromCache(read_keys.begin(), read_keys.end(), s3_configuration, object_infos, format, format_settings, ctx);
ReadBufferIterator read_buffer_iterator = [&, first = true](ColumnsDescription & cached_columns) mutable -> std::unique_ptr<ReadBuffer>
{
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auto [key, _] = (*file_iterator)();
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if (key.empty())
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{
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if (first)
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throw Exception(
ErrorCodes::CANNOT_EXTRACT_TABLE_STRUCTURE,
"Cannot extract table structure from {} format file, because there are no files with provided path in S3. You must specify "
"table structure manually",
format);
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return nullptr;
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}
/// S3 file iterator could get new keys after new iteration, check them in schema cache.
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if (ctx->getSettingsRef().schema_inference_use_cache_for_s3 && read_keys.size() > prev_read_keys_size)
{
columns_from_cache = tryGetColumnsFromCache(read_keys.begin() + prev_read_keys_size, read_keys.end(), s3_configuration, object_infos, format, format_settings, ctx);
prev_read_keys_size = read_keys.size();
if (columns_from_cache)
{
cached_columns = *columns_from_cache;
return nullptr;
}
}
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first = false;
int zstd_window_log_max = static_cast<int>(ctx->getSettingsRef().zstd_window_log_max);
return wrapReadBufferWithCompressionMethod(
std::make_unique<ReadBufferFromS3>(
s3_configuration.client, s3_configuration.uri.bucket, key, s3_configuration.uri.version_id, s3_configuration.request_settings, ctx->getReadSettings()),
chooseCompressionMethod(key, compression_method),
zstd_window_log_max);
};
ColumnsDescription columns;
if (columns_from_cache)
columns = *columns_from_cache;
else
columns = readSchemaFromFormat(format, format_settings, read_buffer_iterator, is_key_with_globs, ctx);
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if (ctx->getSettingsRef().schema_inference_use_cache_for_s3)
addColumnsToCache(read_keys, s3_configuration, columns, format, format_settings, ctx);
return columns;
}
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void registerStorageS3Impl(const String & name, StorageFactory & factory)
{
factory.registerStorage(name, [](const StorageFactory::Arguments & args)
{
auto & engine_args = args.engine_args;
if (engine_args.empty())
throw Exception(ErrorCodes::BAD_ARGUMENTS, "External data source must have arguments");
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auto configuration = StorageS3::getConfiguration(engine_args, args.getLocalContext());
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// Use format settings from global server context + settings from
// the SETTINGS clause of the create query. Settings from current
// session and user are ignored.
std::optional<FormatSettings> format_settings;
if (args.storage_def->settings)
{
FormatFactorySettings user_format_settings;
// Apply changed settings from global context, but ignore the
// unknown ones, because we only have the format settings here.
const auto & changes = args.getContext()->getSettingsRef().changes();
for (const auto & change : changes)
{
if (user_format_settings.has(change.name))
user_format_settings.set(change.name, change.value);
}
// Apply changes from SETTINGS clause, with validation.
user_format_settings.applyChanges(args.storage_def->settings->changes);
format_settings = getFormatSettings(args.getContext(), user_format_settings);
}
else
{
format_settings = getFormatSettings(args.getContext());
}
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ASTPtr partition_by;
if (args.storage_def->partition_by)
partition_by = args.storage_def->partition_by->clone();
return std::make_shared<StorageS3>(
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configuration,
args.table_id,
args.columns,
args.constraints,
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args.comment,
args.getContext(),
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format_settings,
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/* distributed_processing_ */false,
partition_by);
},
{
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.supports_settings = true,
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.supports_sort_order = true, // for partition by
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.supports_schema_inference = true,
.source_access_type = AccessType::S3,
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});
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}
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void registerStorageS3(StorageFactory & factory)
{
return registerStorageS3Impl("S3", factory);
}
void registerStorageCOS(StorageFactory & factory)
{
return registerStorageS3Impl("COSN", factory);
}
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void registerStorageOSS(StorageFactory & factory)
{
return registerStorageS3Impl("OSS", factory);
}
NamesAndTypesList StorageS3::getVirtuals() const
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{
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return virtual_columns;
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}
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bool StorageS3::supportsPartitionBy() const
{
return true;
}
SchemaCache & StorageS3::getSchemaCache(const ContextPtr & ctx)
{
static SchemaCache schema_cache(ctx->getConfigRef().getUInt("schema_inference_cache_max_elements_for_s3", DEFAULT_SCHEMA_CACHE_ELEMENTS));
return schema_cache;
}
std::optional<ColumnsDescription> StorageS3::tryGetColumnsFromCache(
const Strings::const_iterator & begin,
const Strings::const_iterator & end,
const S3Configuration & s3_configuration,
ObjectInfos * object_infos,
const String & format_name,
const std::optional<FormatSettings> & format_settings,
const ContextPtr & ctx)
{
auto & schema_cache = getSchemaCache(ctx);
for (auto it = begin; it < end; ++it)
{
String path = fs::path(s3_configuration.uri.bucket) / *it;
auto get_last_mod_time = [&]() -> std::optional<time_t>
{
S3::ObjectInfo info;
/// Check if we already have information about this object.
/// If no, request it and remember for possible future usage.
if (object_infos && object_infos->contains(path))
info = (*object_infos)[path];
else
{
/// Note that in case of exception in getObjectInfo returned info will be empty,
/// but schema cache will handle this case and won't return columns from cache
/// because we can't say that it's valid without last modification time.
info = S3::getObjectInfo(*s3_configuration.client, s3_configuration.uri.bucket, *it, s3_configuration.uri.version_id, false, false);
if (object_infos)
(*object_infos)[path] = info;
}
if (info.last_modification_time)
return info.last_modification_time;
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return std::nullopt;
};
String source = fs::path(s3_configuration.uri.uri.getHost() + std::to_string(s3_configuration.uri.uri.getPort())) / path;
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auto cache_key = getKeyForSchemaCache(source, format_name, format_settings, ctx);
auto columns = schema_cache.tryGet(cache_key, get_last_mod_time);
if (columns)
return columns;
}
return std::nullopt;
}
void StorageS3::addColumnsToCache(
const Strings & keys,
const S3Configuration & s3_configuration,
const ColumnsDescription & columns,
const String & format_name,
const std::optional<FormatSettings> & format_settings,
const ContextPtr & ctx)
{
auto host_and_bucket = fs::path(s3_configuration.uri.uri.getHost() + std::to_string(s3_configuration.uri.uri.getPort())) / s3_configuration.uri.bucket;
Strings sources;
sources.reserve(keys.size());
std::transform(keys.begin(), keys.end(), std::back_inserter(sources), [&](const String & key){ return host_and_bucket / key; });
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auto cache_keys = getKeysForSchemaCache(sources, format_name, format_settings, ctx);
auto & schema_cache = getSchemaCache(ctx);
schema_cache.addMany(cache_keys, columns);
}
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}
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#endif