ClickHouse/src/Storages/StorageS3.cpp

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#include <Common/config.h>
#if USE_AWS_S3
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#include <IO/S3Common.h>
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#include <Storages/StorageFactory.h>
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#include <Storages/StorageS3.h>
#include <Storages/StorageS3Settings.h>
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#include <Interpreters/Context.h>
#include <Interpreters/evaluateConstantExpression.h>
#include <Parsers/ASTLiteral.h>
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#include <IO/ReadBufferFromS3.h>
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#include <IO/ReadHelpers.h>
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#include <IO/WriteBufferFromS3.h>
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#include <IO/WriteHelpers.h>
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#include <Formats/FormatFactory.h>
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#include <DataStreams/IBlockOutputStream.h>
#include <DataStreams/AddingDefaultsBlockInputStream.h>
#include <DataStreams/narrowBlockInputStreams.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 <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/Sources/SourceWithProgress.h>
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#include <Processors/Formats/InputStreamFromInputFormat.h>
#include <Processors/Pipe.h>
#include <Poco/Util/AbstractConfiguration.h>
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#include <filesystem>
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namespace fs = std::filesystem;
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namespace DB
{
namespace ErrorCodes
{
extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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extern const int UNEXPECTED_EXPRESSION;
extern const int S3_ERROR;
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}
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class StorageS3Source::DisclosedGlobIterator::Impl
{
public:
Impl(Aws::S3::S3Client & client_, const S3::URI & globbed_uri_)
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: client(client_), globbed_uri(globbed_uri_)
{
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std::lock_guard lock(mutex);
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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 asterics.
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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);
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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);
matcher = std::make_unique<re2::RE2>(makeRegexpPatternFromGlobs(globbed_uri.key));
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fillInternalBufferAssumeLocked();
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}
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String next()
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{
std::lock_guard lock(mutex);
return nextAssumeLocked();
}
private:
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String 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();
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return nextAssumeLocked();
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}
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void fillInternalBufferAssumeLocked()
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{
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();
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());
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/// It returns false when all objects were returned
is_finished = !outcome.GetResult().GetIsTruncated();
}
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std::mutex mutex;
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Strings buffer;
Strings::iterator buffer_iter;
Aws::S3::S3Client client;
S3::URI globbed_uri;
Aws::S3::Model::ListObjectsV2Request request;
Aws::S3::Model::ListObjectsV2Outcome outcome;
std::unique_ptr<re2::RE2> matcher;
bool is_finished{false};
};
StorageS3Source::DisclosedGlobIterator::DisclosedGlobIterator(Aws::S3::S3Client & client_, const S3::URI & globbed_uri_)
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: pimpl(std::make_shared<StorageS3Source::DisclosedGlobIterator::Impl>(client_, globbed_uri_)) {}
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String StorageS3Source::DisclosedGlobIterator::next()
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{
return pimpl->next();
}
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Block StorageS3Source::getHeader(Block sample_block, bool with_path_column, bool with_file_column)
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{
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if (with_path_column)
sample_block.insert({DataTypeString().createColumn(), std::make_shared<DataTypeString>(), "_path"});
if (with_file_column)
sample_block.insert({DataTypeString().createColumn(), std::make_shared<DataTypeString>(), "_file"});
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return sample_block;
}
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StorageS3Source::StorageS3Source(
bool need_path,
bool need_file,
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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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const ColumnsDescription & columns_,
UInt64 max_block_size_,
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UInt64 max_single_read_retries_,
const String & compression_hint_,
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const std::shared_ptr<Aws::S3::S3Client> & client_,
const String & bucket_,
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std::shared_ptr<IteratorWrapper> file_iterator_)
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: SourceWithProgress(getHeader(sample_block_, need_path, need_file))
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, WithContext(context_)
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, name(std::move(name_))
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, bucket(bucket_)
, format(format_)
, columns_desc(columns_)
, max_block_size(max_block_size_)
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, max_single_read_retries(max_single_read_retries_)
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, compression_hint(compression_hint_)
, client(client_)
, sample_block(sample_block_)
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, with_file_column(need_file)
, with_path_column(need_path)
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, file_iterator(file_iterator_)
{
initialize();
}
bool StorageS3Source::initialize()
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{
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String current_key = (*file_iterator)();
if (current_key.empty())
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return false;
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file_path = fs::path(bucket) / current_key;
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read_buf = wrapReadBufferWithCompressionMethod(
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std::make_unique<ReadBufferFromS3>(client, bucket, current_key, max_single_read_retries), chooseCompressionMethod(current_key, compression_hint));
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auto input_format = FormatFactory::instance().getInput(format, *read_buf, sample_block, getContext(), max_block_size);
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reader = std::make_shared<InputStreamFromInputFormat>(input_format);
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if (columns_desc.hasDefaults())
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reader = std::make_shared<AddingDefaultsBlockInputStream>(reader, columns_desc, getContext());
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initialized = false;
return true;
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}
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String StorageS3Source::getName() const
{
return name;
}
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Chunk StorageS3Source::generate()
{
if (!reader)
return {};
if (!initialized)
{
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reader->readPrefix();
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initialized = true;
}
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if (auto block = reader->read())
{
auto columns = block.getColumns();
UInt64 num_rows = block.rows();
if (with_path_column)
columns.push_back(DataTypeString().createColumnConst(num_rows, file_path)->convertToFullColumnIfConst());
if (with_file_column)
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{
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size_t last_slash_pos = file_path.find_last_of('/');
columns.push_back(DataTypeString().createColumnConst(num_rows, file_path.substr(
last_slash_pos + 1))->convertToFullColumnIfConst());
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}
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return Chunk(std::move(columns), num_rows);
}
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reader->readSuffix();
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reader.reset();
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read_buf.reset();
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if (!initialize())
return {};
return generate();
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}
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class StorageS3BlockOutputStream : public IBlockOutputStream
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{
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public:
StorageS3BlockOutputStream(
const String & format,
const Block & sample_block_,
ContextPtr context,
const CompressionMethod compression_method,
const std::shared_ptr<Aws::S3::S3Client> & client,
const String & bucket,
const String & key,
size_t min_upload_part_size,
size_t max_single_part_upload_size)
: sample_block(sample_block_)
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{
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write_buf = wrapWriteBufferWithCompressionMethod(
std::make_unique<WriteBufferFromS3>(client, bucket, key, min_upload_part_size, max_single_part_upload_size), compression_method, 3);
writer = FormatFactory::instance().getOutputStreamParallelIfPossible(format, *write_buf, sample_block, context);
}
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Block getHeader() const override
{
return sample_block;
}
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void write(const Block & block) override
{
writer->write(block);
}
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void writePrefix() override
{
writer->writePrefix();
}
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void flush() override
{
writer->flush();
}
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void writeSuffix() override
{
try
{
writer->writeSuffix();
writer->flush();
write_buf->finalize();
}
catch (...)
{
/// Stop ParallelFormattingOutputFormat correctly.
writer.reset();
throw;
}
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}
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private:
Block sample_block;
std::unique_ptr<WriteBuffer> write_buf;
BlockOutputStreamPtr writer;
};
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StorageS3::StorageS3(
const S3::URI & uri_,
const String & access_key_id_,
const String & secret_access_key_,
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const StorageID & table_id_,
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const String & format_name_,
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UInt64 max_single_read_retries_,
UInt64 min_upload_part_size_,
UInt64 max_single_part_upload_size_,
UInt64 max_connections_,
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const ColumnsDescription & columns_,
const ConstraintsDescription & constraints_,
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const String & comment,
ContextPtr context_,
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const String & compression_method_,
bool distributed_processing_)
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: IStorage(table_id_)
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, client_auth{uri_, access_key_id_, secret_access_key_, max_connections_, {}, {}} /// Client and settings will be updated later
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, format_name(format_name_)
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, max_single_read_retries(max_single_read_retries_)
, min_upload_part_size(min_upload_part_size_)
, max_single_part_upload_size(max_single_part_upload_size_)
, compression_method(compression_method_)
, name(uri_.storage_name)
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, distributed_processing(distributed_processing_)
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{
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context_->getGlobalContext()->getRemoteHostFilter().checkURL(uri_.uri);
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StorageInMemoryMetadata storage_metadata;
storage_metadata.setColumns(columns_);
storage_metadata.setConstraints(constraints_);
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storage_metadata.setComment(comment);
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setInMemoryMetadata(storage_metadata);
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updateClientAndAuthSettings(context_, client_auth);
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}
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Pipe StorageS3::read(
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const Names & column_names,
const StorageMetadataPtr & metadata_snapshot,
SelectQueryInfo & /*query_info*/,
ContextPtr local_context,
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QueryProcessingStage::Enum /*processed_stage*/,
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size_t max_block_size,
unsigned num_streams)
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{
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updateClientAndAuthSettings(local_context, client_auth);
Pipes pipes;
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bool need_path_column = false;
bool need_file_column = false;
for (const auto & column : column_names)
{
if (column == "_path")
need_path_column = true;
if (column == "_file")
need_file_column = true;
}
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std::shared_ptr<StorageS3Source::IteratorWrapper> iterator_wrapper{nullptr};
if (distributed_processing)
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{
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iterator_wrapper = std::make_shared<StorageS3Source::IteratorWrapper>(
[callback = local_context->getReadTaskCallback()]() -> String {
return callback();
});
}
else
{
/// Iterate through disclosed globs and make a source for each file
auto glob_iterator = std::make_shared<StorageS3Source::DisclosedGlobIterator>(*client_auth.client, client_auth.uri);
iterator_wrapper = std::make_shared<StorageS3Source::IteratorWrapper>([glob_iterator]()
{
return glob_iterator->next();
});
}
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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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need_path_column,
need_file_column,
format_name,
getName(),
metadata_snapshot->getSampleBlock(),
local_context,
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metadata_snapshot->getColumns(),
max_block_size,
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max_single_read_retries,
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compression_method,
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client_auth.client,
client_auth.uri.bucket,
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iterator_wrapper));
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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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}
BlockOutputStreamPtr StorageS3::write(const ASTPtr & /*query*/, const StorageMetadataPtr & metadata_snapshot, ContextPtr local_context)
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{
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updateClientAndAuthSettings(local_context, client_auth);
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return std::make_shared<StorageS3BlockOutputStream>(
format_name,
metadata_snapshot->getSampleBlock(),
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local_context,
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chooseCompressionMethod(client_auth.uri.key, compression_method),
client_auth.client,
client_auth.uri.bucket,
client_auth.uri.key,
min_upload_part_size,
max_single_part_upload_size);
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}
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void StorageS3::updateClientAndAuthSettings(ContextPtr ctx, StorageS3::ClientAuthentificaiton & upd)
{
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auto settings = ctx->getStorageS3Settings().getSettings(upd.uri.uri.toString());
if (upd.client && (!upd.access_key_id.empty() || settings == upd.auth_settings))
return;
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Aws::Auth::AWSCredentials credentials(upd.access_key_id, upd.secret_access_key);
HeaderCollection headers;
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if (upd.access_key_id.empty())
{
credentials = Aws::Auth::AWSCredentials(settings.access_key_id, settings.secret_access_key);
headers = settings.headers;
}
S3::PocoHTTPClientConfiguration client_configuration = S3::ClientFactory::instance().createClientConfiguration(
settings.region,
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ctx->getRemoteHostFilter(), ctx->getGlobalContext()->getSettingsRef().s3_max_redirects);
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client_configuration.endpointOverride = upd.uri.endpoint;
client_configuration.maxConnections = upd.max_connections;
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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(),
settings.server_side_encryption_customer_key_base64,
std::move(headers),
settings.use_environment_credentials.value_or(ctx->getConfigRef().getBool("s3.use_environment_credentials", false)),
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settings.use_insecure_imds_request.value_or(ctx->getConfigRef().getBool("s3.use_insecure_imds_request", false)));
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upd.auth_settings = std::move(settings);
}
void registerStorageS3Impl(const String & name, StorageFactory & factory)
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{
factory.registerStorage(name, [](const StorageFactory::Arguments & args)
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{
ASTs & engine_args = args.engine_args;
if (engine_args.size() < 2 || engine_args.size() > 5)
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throw Exception(
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"Storage S3 requires 2 to 5 arguments: url, [access_key_id, secret_access_key], name of used format and [compression_method].",
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
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for (auto & engine_arg : engine_args)
engine_arg = evaluateConstantExpressionOrIdentifierAsLiteral(engine_arg, args.getLocalContext());
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String url = engine_args[0]->as<ASTLiteral &>().value.safeGet<String>();
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Poco::URI uri (url);
S3::URI s3_uri (uri);
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String access_key_id;
String secret_access_key;
if (engine_args.size() >= 4)
{
access_key_id = engine_args[1]->as<ASTLiteral &>().value.safeGet<String>();
secret_access_key = engine_args[2]->as<ASTLiteral &>().value.safeGet<String>();
}
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UInt64 max_single_read_retries = args.getLocalContext()->getSettingsRef().s3_max_single_read_retries;
UInt64 min_upload_part_size = args.getLocalContext()->getSettingsRef().s3_min_upload_part_size;
UInt64 max_single_part_upload_size = args.getLocalContext()->getSettingsRef().s3_max_single_part_upload_size;
UInt64 max_connections = args.getLocalContext()->getSettingsRef().s3_max_connections;
String compression_method;
String format_name;
if (engine_args.size() == 3 || engine_args.size() == 5)
{
compression_method = engine_args.back()->as<ASTLiteral &>().value.safeGet<String>();
format_name = engine_args[engine_args.size() - 2]->as<ASTLiteral &>().value.safeGet<String>();
}
else
{
compression_method = "auto";
format_name = engine_args.back()->as<ASTLiteral &>().value.safeGet<String>();
}
return StorageS3::create(
s3_uri,
access_key_id,
secret_access_key,
args.table_id,
format_name,
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max_single_read_retries,
min_upload_part_size,
max_single_part_upload_size,
max_connections,
args.columns,
args.constraints,
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args.comment,
args.getContext(),
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compression_method);
},
{
.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);
}
NamesAndTypesList StorageS3::getVirtuals() const
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{
return NamesAndTypesList{
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{"_path", std::make_shared<DataTypeString>()},
{"_file", std::make_shared<DataTypeString>()}
};
}
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}
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#endif