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ClickHouse/src/Storages/StorageS3.cpp

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#include <Common/config.h>
#include "IO/ParallelReadBuffer.h"
#include "IO/IOThreadPool.h"
#include "Parsers/ASTCreateQuery.h"
#if USE_AWS_S3
#include <Common/isValidUTF8.h>
#include <Functions/FunctionsConversion.h>
#include <IO/S3Common.h>
#include <Interpreters/TreeRewriter.h>
#include <Interpreters/evaluateConstantExpression.h>
#include <Interpreters/threadPoolCallbackRunner.h>
#include <Parsers/ASTFunction.h>
#include <Parsers/ASTInsertQuery.h>
#include <Storages/StorageFactory.h>
#include <Storages/StorageS3.h>
#include <Storages/StorageS3Settings.h>
#include <Storages/StorageSnapshot.h>
#include <Storages/PartitionedSink.h>
#include <Storages/VirtualColumnUtils.h>
#include <Storages/getVirtualsForStorage.h>
#include <Storages/checkAndGetLiteralArgument.h>
#include <IO/ReadBufferFromS3.h>
#include <IO/WriteBufferFromS3.h>
#include <Formats/FormatFactory.h>
#include <Formats/ReadSchemaUtils.h>
#include <Processors/Transforms/AddingDefaultsTransform.h>
#include <Processors/Formats/IOutputFormat.h>
#include <Processors/Formats/IInputFormat.h>
#include <QueryPipeline/narrowPipe.h>
#include <QueryPipeline/QueryPipelineBuilder.h>
#include <Processors/Executors/PullingPipelineExecutor.h>
#include <DataTypes/DataTypeString.h>
#include <aws/core/auth/AWSCredentials.h>
#include <aws/s3/S3Client.h>
#include <aws/s3/model/ListObjectsV2Request.h>
#include <aws/s3/model/CopyObjectRequest.h>
#include <aws/s3/model/DeleteObjectsRequest.h>
#include <Common/parseGlobs.h>
#include <Common/quoteString.h>
#include <re2/re2.h>
#include <Processors/ISource.h>
#include <Processors/Sinks/SinkToStorage.h>
#include <QueryPipeline/Pipe.h>
#include <filesystem>
namespace fs = std::filesystem;
static const String PARTITION_ID_WILDCARD = "{_partition_id}";
namespace DB
{
namespace ErrorCodes
{
extern const int CANNOT_PARSE_TEXT;
extern const int BAD_ARGUMENTS;
extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
extern const int S3_ERROR;
extern const int UNEXPECTED_EXPRESSION;
extern const int DATABASE_ACCESS_DENIED;
extern const int CANNOT_EXTRACT_TABLE_STRUCTURE;
extern const int NOT_IMPLEMENTED;
}
class IOutputFormat;
using OutputFormatPtr = std::shared_ptr<IOutputFormat>;
class StorageS3Source::DisclosedGlobIterator::Impl : WithContext
{
public:
Impl(
const Aws::S3::S3Client & client_,
const S3::URI & globbed_uri_,
ASTPtr & query_,
const Block & virtual_header_,
ContextPtr context_)
: WithContext(context_)
, client(client_)
, globbed_uri(globbed_uri_)
, query(query_)
, virtual_header(virtual_header_)
{
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("*?{"));
/// We don't have to list bucket, because there is no asterisks.
if (key_prefix.size() == globbed_uri.key.size())
{
buffer.emplace_back(globbed_uri.key);
buffer_iter = buffer.begin();
is_finished = true;
return;
}
/// Create a virtual block with one row to construct filter
if (query && virtual_header)
{
/// Append "key" column as the filter result
virtual_header.insert({ColumnString::create(), std::make_shared<DataTypeString>(), "_key"});
auto block = virtual_header.cloneEmpty();
MutableColumns columns = block.mutateColumns();
for (auto & column : columns)
column->insertDefault();
block.setColumns(std::move(columns));
VirtualColumnUtils::prepareFilterBlockWithQuery(query, getContext(), block, filter_ast);
}
request.SetBucket(globbed_uri.bucket);
request.SetPrefix(key_prefix);
matcher = std::make_unique<re2::RE2>(makeRegexpPatternFromGlobs(globbed_uri.key));
fillInternalBufferAssumeLocked();
}
String next()
{
std::lock_guard lock(mutex);
return nextAssumeLocked();
}
private:
String nextAssumeLocked()
{
if (buffer_iter != buffer.end())
{
auto answer = *buffer_iter;
++buffer_iter;
return answer;
}
if (is_finished)
return {};
fillInternalBufferAssumeLocked();
return nextAssumeLocked();
}
void fillInternalBufferAssumeLocked()
{
buffer.clear();
outcome = client.ListObjectsV2(request);
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();
if (filter_ast)
{
auto block = virtual_header.cloneEmpty();
MutableColumnPtr path_column;
MutableColumnPtr file_column;
MutableColumnPtr key_column = block.getByName("_key").column->assumeMutable();
if (block.has("_path"))
path_column = block.getByName("_path").column->assumeMutable();
if (block.has("_file"))
file_column = block.getByName("_file").column->assumeMutable();
for (const auto & row : result_batch)
{
const String & key = row.GetKey();
if (re2::RE2::FullMatch(key, *matcher))
{
String path = fs::path(globbed_uri.bucket) / key;
String file = path.substr(path.find_last_of('/') + 1);
if (path_column)
path_column->insert(path);
if (file_column)
file_column->insert(file);
key_column->insert(key);
}
}
VirtualColumnUtils::filterBlockWithQuery(query, block, getContext(), filter_ast);
const ColumnString & keys = typeid_cast<const ColumnString &>(*block.getByName("_key").column);
size_t rows = block.rows();
buffer.reserve(rows);
for (size_t i = 0; i < rows; ++i)
buffer.emplace_back(keys.getDataAt(i).toString());
}
else
{
buffer.reserve(result_batch.size());
for (const auto & row : result_batch)
{
String key = row.GetKey();
if (re2::RE2::FullMatch(key, *matcher))
buffer.emplace_back(std::move(key));
}
}
/// Set iterator only after the whole batch is processed
buffer_iter = buffer.begin();
request.SetContinuationToken(outcome.GetResult().GetNextContinuationToken());
/// It returns false when all objects were returned
is_finished = !outcome.GetResult().GetIsTruncated();
}
std::mutex mutex;
Strings buffer;
Strings::iterator buffer_iter;
Aws::S3::S3Client client;
S3::URI globbed_uri;
ASTPtr query;
Block virtual_header;
ASTPtr filter_ast;
Aws::S3::Model::ListObjectsV2Request request;
Aws::S3::Model::ListObjectsV2Outcome outcome;
std::unique_ptr<re2::RE2> matcher;
bool is_finished{false};
};
StorageS3Source::DisclosedGlobIterator::DisclosedGlobIterator(
const Aws::S3::S3Client & client_,
const S3::URI & globbed_uri_,
ASTPtr query,
const Block & virtual_header,
ContextPtr context)
: pimpl(std::make_shared<StorageS3Source::DisclosedGlobIterator::Impl>(client_, globbed_uri_, query, virtual_header, context))
{
}
String StorageS3Source::DisclosedGlobIterator::next()
{
return pimpl->next();
}
class StorageS3Source::KeysIterator::Impl : WithContext
{
public:
explicit Impl(
const std::vector<String> & keys_, const String & bucket_, ASTPtr query_, const Block & virtual_header_, ContextPtr context_)
: WithContext(context_), keys(keys_), bucket(bucket_), query(query_), virtual_header(virtual_header_)
{
/// Create a virtual block with one row to construct filter
if (query && virtual_header)
{
/// Append "key" column as the filter result
virtual_header.insert({ColumnString::create(), std::make_shared<DataTypeString>(), "_key"});
auto block = virtual_header.cloneEmpty();
MutableColumns columns = block.mutateColumns();
for (auto & column : columns)
column->insertDefault();
block.setColumns(std::move(columns));
ASTPtr filter_ast;
VirtualColumnUtils::prepareFilterBlockWithQuery(query, getContext(), block, filter_ast);
if (filter_ast)
{
block = virtual_header.cloneEmpty();
MutableColumnPtr path_column;
MutableColumnPtr file_column;
MutableColumnPtr key_column = block.getByName("_key").column->assumeMutable();
if (block.has("_path"))
path_column = block.getByName("_path").column->assumeMutable();
if (block.has("_file"))
file_column = block.getByName("_file").column->assumeMutable();
for (const auto & key : keys)
{
String path = fs::path(bucket) / key;
String file = path.substr(path.find_last_of('/') + 1);
if (path_column)
path_column->insert(path);
if (file_column)
file_column->insert(file);
key_column->insert(key);
}
VirtualColumnUtils::filterBlockWithQuery(query, block, getContext(), filter_ast);
const ColumnString & keys_col = typeid_cast<const ColumnString &>(*block.getByName("_key").column);
size_t rows = block.rows();
Strings filtered_keys;
filtered_keys.reserve(rows);
for (size_t i = 0; i < rows; ++i)
filtered_keys.emplace_back(keys_col.getDataAt(i).toString());
keys = std::move(filtered_keys);
}
}
}
String next()
{
size_t current_index = index.fetch_add(1, std::memory_order_relaxed);
if (current_index >= keys.size())
return "";
return keys[current_index];
}
private:
Strings keys;
std::atomic_size_t index = 0;
String bucket;
ASTPtr query;
Block virtual_header;
};
StorageS3Source::KeysIterator::KeysIterator(
const std::vector<String> & keys_, const String & bucket_, ASTPtr query, const Block & virtual_header, ContextPtr context)
: pimpl(std::make_shared<StorageS3Source::KeysIterator::Impl>(keys_, bucket_, query, virtual_header, context))
{
}
String StorageS3Source::KeysIterator::next()
{
return pimpl->next();
}
class StorageS3Source::ReadTasksIterator::Impl
{
public:
explicit Impl(const std::vector<String> & read_tasks_, const ReadTaskCallback & new_read_tasks_callback_)
: read_tasks(read_tasks_), new_read_tasks_callback(new_read_tasks_callback_)
{
}
String next()
{
size_t current_index = index.fetch_add(1, std::memory_order_relaxed);
if (current_index >= read_tasks.size())
return new_read_tasks_callback();
return read_tasks[current_index];
}
private:
std::atomic_size_t index = 0;
std::vector<String> read_tasks;
ReadTaskCallback new_read_tasks_callback;
};
StorageS3Source::ReadTasksIterator::ReadTasksIterator(
const std::vector<String> & read_tasks_, const ReadTaskCallback & new_read_tasks_callback_)
: pimpl(std::make_shared<StorageS3Source::ReadTasksIterator::Impl>(read_tasks_, new_read_tasks_callback_))
{
}
String StorageS3Source::ReadTasksIterator::next()
{
return pimpl->next();
}
Block StorageS3Source::getHeader(Block sample_block, const std::vector<NameAndTypePair> & requested_virtual_columns)
{
for (const auto & virtual_column : requested_virtual_columns)
sample_block.insert({virtual_column.type->createColumn(), virtual_column.type, virtual_column.name});
return sample_block;
}
StorageS3Source::StorageS3Source(
const std::vector<NameAndTypePair> & requested_virtual_columns_,
const String & format_,
String name_,
const Block & sample_block_,
ContextPtr context_,
std::optional<FormatSettings> format_settings_,
const ColumnsDescription & columns_,
UInt64 max_block_size_,
UInt64 max_single_read_retries_,
String compression_hint_,
const std::shared_ptr<const Aws::S3::S3Client> & client_,
const String & bucket_,
const String & version_id_,
std::shared_ptr<IteratorWrapper> file_iterator_,
const size_t download_thread_num_)
: ISource(getHeader(sample_block_, requested_virtual_columns_))
, WithContext(context_)
, name(std::move(name_))
, bucket(bucket_)
, version_id(version_id_)
, format(format_)
, columns_desc(columns_)
, max_block_size(max_block_size_)
, max_single_read_retries(max_single_read_retries_)
, compression_hint(std::move(compression_hint_))
, client(client_)
, sample_block(sample_block_)
, format_settings(format_settings_)
, requested_virtual_columns(requested_virtual_columns_)
, file_iterator(file_iterator_)
, download_thread_num(download_thread_num_)
{
initialize();
}
void StorageS3Source::onCancel()
{
std::lock_guard lock(reader_mutex);
if (reader)
reader->cancel();
}
bool StorageS3Source::initialize()
{
String current_key = (*file_iterator)();
if (current_key.empty())
return false;
file_path = fs::path(bucket) / current_key;
auto zstd_window_log_max = getContext()->getSettingsRef().zstd_window_log_max;
read_buf = wrapReadBufferWithCompressionMethod(createS3ReadBuffer(current_key), chooseCompressionMethod(current_key, compression_hint), zstd_window_log_max);
auto input_format = getContext()->getInputFormat(format, *read_buf, sample_block, max_block_size, format_settings);
QueryPipelineBuilder builder;
builder.init(Pipe(input_format));
if (columns_desc.hasDefaults())
{
builder.addSimpleTransform(
[&](const Block & header)
{ return std::make_shared<AddingDefaultsTransform>(header, columns_desc, *input_format, getContext()); });
}
pipeline = std::make_unique<QueryPipeline>(QueryPipelineBuilder::getPipeline(std::move(builder)));
reader = std::make_unique<PullingPipelineExecutor>(*pipeline);
return true;
}
std::unique_ptr<ReadBuffer> StorageS3Source::createS3ReadBuffer(const String & key)
{
const size_t object_size = DB::S3::getObjectSize(client, bucket, key, version_id, false);
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;
if (!use_parallel_download || object_too_small)
{
LOG_TRACE(log, "Downloading object of size {} from S3 in single thread", object_size);
return std::make_unique<ReadBufferFromS3>(client, bucket, key, version_id, max_single_read_retries, getContext()->getReadSettings());
}
assert(object_size > 0);
if (download_buffer_size < DBMS_DEFAULT_BUFFER_SIZE)
{
LOG_WARNING(log, "Downloading buffer {} bytes too small, set at least {} bytes", download_buffer_size, DBMS_DEFAULT_BUFFER_SIZE);
download_buffer_size = DBMS_DEFAULT_BUFFER_SIZE;
}
auto factory = std::make_unique<ReadBufferS3Factory>(
client, bucket, key, version_id, download_buffer_size, object_size, max_single_read_retries, getContext()->getReadSettings());
LOG_TRACE(
log, "Downloading from S3 in {} threads. Object size: {}, Range size: {}.", download_thread_num, object_size, download_buffer_size);
return std::make_unique<ParallelReadBuffer>(std::move(factory), threadPoolCallbackRunner(IOThreadPool::get()), download_thread_num);
}
String StorageS3Source::getName() const
{
return name;
}
Chunk StorageS3Source::generate()
{
while (true)
{
if (!reader || isCancelled())
break;
Chunk chunk;
if (reader->pull(chunk))
{
UInt64 num_rows = chunk.getNumRows();
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());
}
}
return chunk;
}
{
std::lock_guard lock(reader_mutex);
reader.reset();
pipeline.reset();
read_buf.reset();
if (!initialize())
break;
}
}
return {};
}
static bool checkIfObjectExists(const std::shared_ptr<const Aws::S3::S3Client> & client, const String & bucket, const String & key)
{
bool is_finished = false;
Aws::S3::Model::ListObjectsV2Request request;
Aws::S3::Model::ListObjectsV2Outcome outcome;
request.SetBucket(bucket);
request.SetPrefix(key);
while (!is_finished)
{
outcome = client->ListObjectsV2(request);
if (!outcome.IsSuccess())
throw Exception(
ErrorCodes::S3_ERROR,
"Could not list objects in bucket {} with key {}, S3 exception: {}, message: {}",
quoteString(bucket),
quoteString(key),
backQuote(outcome.GetError().GetExceptionName()),
quoteString(outcome.GetError().GetMessage()));
const auto & result_batch = outcome.GetResult().GetContents();
for (const auto & obj : result_batch)
{
if (obj.GetKey() == key)
return true;
}
request.SetContinuationToken(outcome.GetResult().GetNextContinuationToken());
is_finished = !outcome.GetResult().GetIsTruncated();
}
return false;
}
class StorageS3Sink : public SinkToStorage
{
public:
StorageS3Sink(
const String & format,
const Block & sample_block_,
ContextPtr context,
std::optional<FormatSettings> format_settings_,
const CompressionMethod compression_method,
const StorageS3::S3Configuration & s3_configuration_,
const String & bucket,
const String & key)
: SinkToStorage(sample_block_)
, sample_block(sample_block_)
, format_settings(format_settings_)
{
write_buf = wrapWriteBufferWithCompressionMethod(
std::make_unique<WriteBufferFromS3>(
s3_configuration_.client,
bucket,
key,
s3_configuration_.rw_settings,
std::nullopt,
DBMS_DEFAULT_BUFFER_SIZE,
threadPoolCallbackRunner(IOThreadPool::get()),
context->getWriteSettings()),
compression_method,
3);
writer
= FormatFactory::instance().getOutputFormatParallelIfPossible(format, *write_buf, sample_block, context, {}, format_settings);
}
String getName() const override { return "StorageS3Sink"; }
void consume(Chunk chunk) override
{
writer->write(getHeader().cloneWithColumns(chunk.detachColumns()));
}
void onException() override
{
if (!writer)
return;
onFinish();
}
void onFinish() override
{
try
{
writer->finalize();
writer->flush();
write_buf->finalize();
}
catch (...)
{
/// Stop ParallelFormattingOutputFormat correctly.
writer.reset();
throw;
}
}
private:
Block sample_block;
std::optional<FormatSettings> format_settings;
std::unique_ptr<WriteBuffer> write_buf;
OutputFormatPtr writer;
};
class PartitionedStorageS3Sink : public PartitionedSink
{
public:
PartitionedStorageS3Sink(
const ASTPtr & partition_by,
const String & format_,
const Block & sample_block_,
ContextPtr context_,
std::optional<FormatSettings> format_settings_,
const CompressionMethod compression_method_,
const StorageS3::S3Configuration & s3_configuration_,
const String & bucket_,
const String & key_)
: PartitionedSink(partition_by, context_, sample_block_)
, format(format_)
, sample_block(sample_block_)
, context(context_)
, compression_method(compression_method_)
, s3_configuration(s3_configuration_)
, bucket(bucket_)
, key(key_)
, format_settings(format_settings_)
{
}
SinkPtr createSinkForPartition(const String & partition_id) override
{
auto partition_bucket = replaceWildcards(bucket, partition_id);
validateBucket(partition_bucket);
auto partition_key = replaceWildcards(key, partition_id);
validateKey(partition_key);
return std::make_shared<StorageS3Sink>(
format,
sample_block,
context,
format_settings,
compression_method,
s3_configuration,
partition_bucket,
partition_key
);
}
private:
const String format;
const Block sample_block;
ContextPtr context;
const CompressionMethod compression_method;
const StorageS3::S3Configuration & s3_configuration;
const String bucket;
const String key;
std::optional<FormatSettings> format_settings;
ExpressionActionsPtr partition_by_expr;
static void validateBucket(const String & str)
{
S3::URI::validateBucket(str, {});
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);
}
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
if (str.empty() || str.size() > 1024)
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Incorrect key length (not empty, max 1023 characters), got: {}", str.size());
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);
}
};
StorageS3::StorageS3(
const S3::URI & uri_,
const String & access_key_id_,
const String & secret_access_key_,
const StorageID & table_id_,
const String & format_name_,
const S3Settings::ReadWriteSettings & rw_settings_,
const ColumnsDescription & columns_,
const ConstraintsDescription & constraints_,
const String & comment,
ContextPtr context_,
std::optional<FormatSettings> format_settings_,
const String & compression_method_,
bool distributed_processing_,
ASTPtr partition_by_)
: IStorage(table_id_)
, s3_configuration{uri_, access_key_id_, secret_access_key_, {}, {}, rw_settings_} /// Client and settings will be updated later
, keys({uri_.key})
, format_name(format_name_)
, compression_method(compression_method_)
, name(uri_.storage_name)
, distributed_processing(distributed_processing_)
, format_settings(format_settings_)
, partition_by(partition_by_)
, is_key_with_globs(uri_.key.find_first_of("*?{") != std::string::npos)
{
FormatFactory::instance().checkFormatName(format_name);
context_->getGlobalContext()->getRemoteHostFilter().checkURL(uri_.uri);
StorageInMemoryMetadata storage_metadata;
updateS3Configuration(context_, s3_configuration);
if (columns_.empty())
{
auto columns = getTableStructureFromDataImpl(
format_name,
s3_configuration,
compression_method,
distributed_processing_,
is_key_with_globs,
format_settings,
context_,
&read_tasks_used_in_schema_inference);
storage_metadata.setColumns(columns);
}
else
storage_metadata.setColumns(columns_);
storage_metadata.setConstraints(constraints_);
storage_metadata.setComment(comment);
setInMemoryMetadata(storage_metadata);
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);
for (const auto & column : virtual_columns)
virtual_block.insert({column.type->createColumn(), column.type, column.name});
}
std::shared_ptr<StorageS3Source::IteratorWrapper> StorageS3::createFileIterator(
const S3Configuration & s3_configuration,
const std::vector<String> & keys,
bool is_key_with_globs,
bool distributed_processing,
ContextPtr local_context,
ASTPtr query,
const Block & virtual_block,
const std::vector<String> & read_tasks)
{
if (distributed_processing)
{
return std::make_shared<StorageS3Source::IteratorWrapper>(
[read_tasks_iterator = std::make_shared<StorageS3Source::ReadTasksIterator>(read_tasks, local_context->getReadTaskCallback())]() -> String
{
return read_tasks_iterator->next();
});
}
else if (is_key_with_globs)
{
/// Iterate through disclosed globs and make a source for each file
auto glob_iterator = std::make_shared<StorageS3Source::DisclosedGlobIterator>(
*s3_configuration.client, s3_configuration.uri, query, virtual_block, local_context);
return std::make_shared<StorageS3Source::IteratorWrapper>([glob_iterator]() { return glob_iterator->next(); });
}
else
{
auto keys_iterator
= std::make_shared<StorageS3Source::KeysIterator>(keys, s3_configuration.uri.bucket, query, virtual_block, local_context);
return std::make_shared<StorageS3Source::IteratorWrapper>([keys_iterator]() { return keys_iterator->next(); });
}
}
bool StorageS3::supportsSubsetOfColumns() const
{
return FormatFactory::instance().checkIfFormatSupportsSubsetOfColumns(format_name);
}
Pipe StorageS3::read(
const Names & column_names,
const StorageSnapshotPtr & storage_snapshot,
SelectQueryInfo & query_info,
ContextPtr local_context,
QueryProcessingStage::Enum /*processed_stage*/,
size_t max_block_size,
unsigned num_streams)
{
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");
updateS3Configuration(local_context, s3_configuration);
Pipes pipes;
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())
{
if (column_names_set.contains(virtual_column.name))
requested_virtual_columns.push_back(virtual_column);
}
std::shared_ptr<StorageS3Source::IteratorWrapper> iterator_wrapper = createFileIterator(
s3_configuration,
keys,
is_key_with_globs,
distributed_processing,
local_context,
query_info.query,
virtual_block,
read_tasks_used_in_schema_inference);
ColumnsDescription columns_description;
Block block_for_format;
if (supportsSubsetOfColumns())
{
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())
fetch_columns.push_back(ExpressionActions::getSmallestColumn(storage_snapshot->metadata->getColumns().getAllPhysical()));
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();
}
const size_t max_download_threads = local_context->getSettingsRef().max_download_threads;
for (size_t i = 0; i < num_streams; ++i)
{
pipes.emplace_back(std::make_shared<StorageS3Source>(
requested_virtual_columns,
format_name,
getName(),
block_for_format,
local_context,
format_settings,
columns_description,
max_block_size,
s3_configuration.rw_settings.max_single_read_retries,
compression_method,
s3_configuration.client,
s3_configuration.uri.bucket,
s3_configuration.uri.version_id,
iterator_wrapper,
max_download_threads));
}
auto pipe = Pipe::unitePipes(std::move(pipes));
narrowPipe(pipe, num_streams);
return pipe;
}
SinkToStoragePtr StorageS3::write(const ASTPtr & query, const StorageMetadataPtr & metadata_snapshot, ContextPtr local_context)
{
updateS3Configuration(local_context, s3_configuration);
auto sample_block = metadata_snapshot->getSampleBlock();
auto chosen_compression_method = chooseCompressionMethod(keys.back(), compression_method);
bool has_wildcards = s3_configuration.uri.bucket.find(PARTITION_ID_WILDCARD) != String::npos || keys.back().find(PARTITION_ID_WILDCARD) != String::npos;
auto insert_query = std::dynamic_pointer_cast<ASTInsertQuery>(query);
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;
if (is_partitioned_implementation)
{
return std::make_shared<PartitionedStorageS3Sink>(
partition_by_ast,
format_name,
sample_block,
local_context,
format_settings,
chosen_compression_method,
s3_configuration,
s3_configuration.uri.bucket,
keys.back());
}
else
{
if (is_key_with_globs)
throw Exception(ErrorCodes::DATABASE_ACCESS_DENIED, "S3 key '{}' contains globs, so the table is in readonly mode", s3_configuration.uri.key);
bool truncate_in_insert = local_context->getSettingsRef().s3_truncate_on_insert;
if (!truncate_in_insert && checkIfObjectExists(s3_configuration.client, s3_configuration.uri.bucket, keys.back()))
{
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 (checkIfObjectExists(s3_configuration.client, s3_configuration.uri.bucket, new_key));
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",
s3_configuration.uri.bucket,
keys.back());
}
return std::make_shared<StorageS3Sink>(
format_name,
sample_block,
local_context,
format_settings,
chosen_compression_method,
s3_configuration,
s3_configuration.uri.bucket,
keys.back());
}
}
void StorageS3::truncate(const ASTPtr & /* query */, const StorageMetadataPtr &, ContextPtr local_context, TableExclusiveLockHolder &)
{
updateS3Configuration(local_context, s3_configuration);
if (is_key_with_globs)
throw Exception(ErrorCodes::DATABASE_ACCESS_DENIED, "S3 key '{}' contains globs, so the table is in readonly mode", s3_configuration.uri.key);
Aws::S3::Model::Delete delkeys;
for (const auto & key : keys)
{
Aws::S3::Model::ObjectIdentifier obj;
obj.SetKey(key);
delkeys.AddObjects(std::move(obj));
}
Aws::S3::Model::DeleteObjectsRequest request;
request.SetBucket(s3_configuration.uri.bucket);
request.SetDelete(delkeys);
auto response = s3_configuration.client->DeleteObjects(request);
if (!response.IsSuccess())
{
const auto & err = response.GetError();
throw Exception(std::to_string(static_cast<int>(err.GetErrorType())) + ": " + err.GetMessage(), ErrorCodes::S3_ERROR);
}
}
void StorageS3::updateS3Configuration(ContextPtr ctx, StorageS3::S3Configuration & upd)
{
auto settings = ctx->getStorageS3Settings().getSettings(upd.uri.uri.toString());
bool need_update_configuration = settings != S3Settings{};
if (need_update_configuration)
{
if (upd.rw_settings != settings.rw_settings)
upd.rw_settings = settings.rw_settings;
}
upd.rw_settings.updateFromSettingsIfEmpty(ctx->getSettings());
if (upd.client && (!upd.access_key_id.empty() || settings.auth_settings == upd.auth_settings))
return;
Aws::Auth::AWSCredentials credentials(upd.access_key_id, upd.secret_access_key);
HeaderCollection headers;
if (upd.access_key_id.empty())
{
credentials = Aws::Auth::AWSCredentials(settings.auth_settings.access_key_id, settings.auth_settings.secret_access_key);
headers = settings.auth_settings.headers;
}
S3::PocoHTTPClientConfiguration client_configuration = S3::ClientFactory::instance().createClientConfiguration(
settings.auth_settings.region,
ctx->getRemoteHostFilter(), ctx->getGlobalContext()->getSettingsRef().s3_max_redirects,
ctx->getGlobalContext()->getSettingsRef().enable_s3_requests_logging);
client_configuration.endpointOverride = upd.uri.endpoint;
client_configuration.maxConnections = upd.rw_settings.max_connections;
upd.client = S3::ClientFactory::instance().create(
client_configuration,
upd.uri.is_virtual_hosted_style,
credentials.GetAWSAccessKeyId(),
credentials.GetAWSSecretKey(),
settings.auth_settings.server_side_encryption_customer_key_base64,
std::move(headers),
settings.auth_settings.use_environment_credentials.value_or(ctx->getConfigRef().getBool("s3.use_environment_credentials", false)),
settings.auth_settings.use_insecure_imds_request.value_or(ctx->getConfigRef().getBool("s3.use_insecure_imds_request", false)));
upd.auth_settings = std::move(settings.auth_settings);
}
void StorageS3::processNamedCollectionResult(StorageS3Configuration & configuration, const std::vector<std::pair<String, ASTPtr>> & key_value_args)
{
for (const auto & [arg_name, arg_value] : key_value_args)
{
if (arg_name == "access_key_id")
configuration.auth_settings.access_key_id = checkAndGetLiteralArgument<String>(arg_value, "access_key_id");
else if (arg_name == "secret_access_key")
configuration.auth_settings.secret_access_key = checkAndGetLiteralArgument<String>(arg_value, "secret_access_key");
else if (arg_name == "filename")
configuration.url = std::filesystem::path(configuration.url) / checkAndGetLiteralArgument<String>(arg_value, "filename");
else if (arg_name == "use_environment_credentials")
configuration.auth_settings.use_environment_credentials = checkAndGetLiteralArgument<UInt8>(arg_value, "use_environment_credentials");
else if (arg_name == "max_single_read_retries")
configuration.rw_settings.max_single_read_retries = checkAndGetLiteralArgument<UInt64>(arg_value, "max_single_read_retries");
else if (arg_name == "min_upload_part_size")
configuration.rw_settings.max_single_read_retries = checkAndGetLiteralArgument<UInt64>(arg_value, "min_upload_part_size");
else if (arg_name == "upload_part_size_multiply_factor")
configuration.rw_settings.max_single_read_retries = checkAndGetLiteralArgument<UInt64>(arg_value, "upload_part_size_multiply_factor");
else if (arg_name == "upload_part_size_multiply_parts_count_threshold")
configuration.rw_settings.max_single_read_retries = checkAndGetLiteralArgument<UInt64>(arg_value, "upload_part_size_multiply_parts_count_threshold");
else if (arg_name == "max_single_part_upload_size")
configuration.rw_settings.max_single_read_retries = checkAndGetLiteralArgument<UInt64>(arg_value, "max_single_part_upload_size");
else if (arg_name == "max_connections")
configuration.rw_settings.max_single_read_retries = checkAndGetLiteralArgument<UInt64>(arg_value, "max_connections");
else
throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH,
"Unknown key-value argument `{}` for StorageS3, expected: url, [access_key_id, secret_access_key], name of used format and [compression_method].",
arg_name);
}
}
StorageS3Configuration StorageS3::getConfiguration(ASTs & engine_args, ContextPtr local_context)
{
StorageS3Configuration configuration;
if (auto named_collection = getURLBasedDataSourceConfiguration(engine_args, local_context))
{
auto [common_configuration, storage_specific_args] = named_collection.value();
configuration.set(common_configuration);
processNamedCollectionResult(configuration, storage_specific_args);
}
else
{
if (engine_args.empty() || engine_args.size() > 5)
throw Exception(
"Storage S3 requires 1 to 5 arguments: url, [access_key_id, secret_access_key], name of used format and [compression_method].",
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
for (auto & engine_arg : engine_args)
engine_arg = evaluateConstantExpressionOrIdentifierAsLiteral(engine_arg, local_context);
configuration.url = checkAndGetLiteralArgument<String>(engine_args[0], "url");
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");
}
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");
}
else if (engine_args.size() != 1)
{
configuration.compression_method = "auto";
configuration.format = checkAndGetLiteralArgument<String>(engine_args.back(), "format");
}
}
if (configuration.format == "auto")
configuration.format = FormatFactory::instance().getFormatFromFileName(configuration.url, true);
return configuration;
}
ColumnsDescription StorageS3::getTableStructureFromData(
const String & format,
const S3::URI & uri,
const String & access_key_id,
const String & secret_access_key,
const String & compression_method,
bool distributed_processing,
const std::optional<FormatSettings> & format_settings,
ContextPtr ctx)
{
S3Configuration s3_configuration{ uri, access_key_id, secret_access_key, {}, {}, S3Settings::ReadWriteSettings(ctx->getSettingsRef()) };
updateS3Configuration(ctx, s3_configuration);
return getTableStructureFromDataImpl(format, s3_configuration, compression_method, distributed_processing, uri.key.find_first_of("*?{") != std::string::npos, format_settings, ctx);
}
ColumnsDescription StorageS3::getTableStructureFromDataImpl(
const String & format,
const S3Configuration & s3_configuration,
const String & compression_method,
bool distributed_processing,
bool is_key_with_globs,
const std::optional<FormatSettings> & format_settings,
ContextPtr ctx,
std::vector<String> * read_keys_in_distributed_processing)
{
auto file_iterator
= createFileIterator(s3_configuration, {s3_configuration.uri.key}, is_key_with_globs, distributed_processing, ctx, nullptr, {});
ReadBufferIterator read_buffer_iterator = [&, first = true]() mutable -> std::unique_ptr<ReadBuffer>
{
auto key = (*file_iterator)();
if (key.empty())
{
if (first)
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);
return nullptr;
}
if (distributed_processing && read_keys_in_distributed_processing)
read_keys_in_distributed_processing->push_back(key);
first = false;
const auto zstd_window_log_max = 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.rw_settings.max_single_read_retries, ctx->getReadSettings()),
chooseCompressionMethod(key, compression_method),
zstd_window_log_max);
};
return readSchemaFromFormat(format, format_settings, read_buffer_iterator, is_key_with_globs, ctx);
}
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");
auto configuration = StorageS3::getConfiguration(engine_args, args.getLocalContext());
// 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());
}
S3::URI s3_uri(Poco::URI(configuration.url));
ASTPtr partition_by;
if (args.storage_def->partition_by)
partition_by = args.storage_def->partition_by->clone();
return std::make_shared<StorageS3>(
s3_uri,
configuration.auth_settings.access_key_id,
configuration.auth_settings.secret_access_key,
args.table_id,
configuration.format,
configuration.rw_settings,
args.columns,
args.constraints,
args.comment,
args.getContext(),
format_settings,
configuration.compression_method,
/* distributed_processing_ */false,
partition_by);
},
{
.supports_settings = true,
.supports_sort_order = true, // for partition by
.supports_schema_inference = true,
.source_access_type = AccessType::S3,
});
}
void registerStorageS3(StorageFactory & factory)
{
return registerStorageS3Impl("S3", factory);
}
void registerStorageCOS(StorageFactory & factory)
{
return registerStorageS3Impl("COSN", factory);
}
NamesAndTypesList StorageS3::getVirtuals() const
{
return virtual_columns;
}
bool StorageS3::supportsPartitionBy() const
{
return true;
}
}
#endif
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