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#include "clickhouse_config.h"
#include <Compression/CompressionFactory.h>
#include <Parsers/ASTFunction.h>
#include <Parsers/ASTIdentifier.h>
#include <Parsers/ASTLiteral.h>
#include <Poco/String.h>
#include <IO/ReadBuffer.h>
#include <Parsers/queryToString.h>
#include <Compression/CompressionCodecMultiple.h>
#include <Compression/CompressionCodecNone.h>
#include <IO/WriteHelpers.h>
#include <boost/algorithm/string/join.hpp>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
extern const int UNKNOWN_CODEC;
extern const int UNEXPECTED_AST_STRUCTURE;
extern const int DATA_TYPE_CANNOT_HAVE_ARGUMENTS;
}
CompressionCodecPtr CompressionCodecFactory::getDefaultCodec() const
{
return default_codec;
}
CompressionCodecPtr CompressionCodecFactory::get(const String & family_name, std::optional<int> level) const
{
if (level)
{
auto level_literal = std::make_shared<ASTLiteral>(static_cast<UInt64>(*level));
return get(makeASTFunction("CODEC", makeASTFunction(Poco::toUpper(family_name), level_literal)), {});
}
else
{
auto identifier = std::make_shared<ASTIdentifier>(Poco::toUpper(family_name));
return get(makeASTFunction("CODEC", identifier), {});
}
}
CompressionCodecPtr CompressionCodecFactory::get(
const ASTPtr & ast, const IDataType * column_type, CompressionCodecPtr current_default, bool only_generic) const
{
if (current_default == nullptr)
current_default = default_codec;
if (const auto * func = ast->as<ASTFunction>())
{
Codecs codecs;
codecs.reserve(func->arguments->children.size());
for (const auto & inner_codec_ast : func->arguments->children)
{
String codec_family_name;
ASTPtr codec_arguments;
if (const auto * family_name = inner_codec_ast->as<ASTIdentifier>())
{
codec_family_name = family_name->name();
codec_arguments = {};
}
else if (const auto * ast_func = inner_codec_ast->as<ASTFunction>())
{
codec_family_name = ast_func->name;
codec_arguments = ast_func->arguments;
}
else
throw Exception(ErrorCodes::UNEXPECTED_AST_STRUCTURE, "Unexpected AST element for compression codec");
CompressionCodecPtr codec;
if (codec_family_name == DEFAULT_CODEC_NAME)
codec = current_default;
else
codec = getImpl(codec_family_name, codec_arguments, column_type);
if (only_generic && !codec->isGenericCompression())
continue;
codecs.emplace_back(codec);
}
CompressionCodecPtr res;
if (codecs.size() == 1)
return codecs.back();
else if (codecs.size() > 1)
return std::make_shared<CompressionCodecMultiple>(codecs);
else
return std::make_shared<CompressionCodecNone>();
}
throw Exception(ErrorCodes::UNEXPECTED_AST_STRUCTURE, "Unexpected AST structure for compression codec: {}", queryToString(ast));
}
CompressionCodecPtr CompressionCodecFactory::get(uint8_t byte_code) const
{
const auto family_code_and_creator = family_code_with_codec.find(byte_code);
if (family_code_and_creator == family_code_with_codec.end())
throw Exception(ErrorCodes::UNKNOWN_CODEC, "Unknown codec family code: {}", toString(byte_code));
return family_code_and_creator->second({}, nullptr);
}
CompressionCodecPtr CompressionCodecFactory::getImpl(const String & family_name, const ASTPtr & arguments, const IDataType * column_type) const
{
if (family_name == "Multiple")
throw Exception(ErrorCodes::UNKNOWN_CODEC, "Codec Multiple cannot be specified directly");
const auto family_and_creator = family_name_with_codec.find(family_name);
if (family_and_creator == family_name_with_codec.end())
throw Exception(ErrorCodes::UNKNOWN_CODEC, "Unknown codec family: {}", family_name);
return family_and_creator->second(arguments, column_type);
}
void CompressionCodecFactory::registerCompressionCodecWithType(
const String & family_name,
std::optional<uint8_t> byte_code,
CreatorWithType creator)
{
if (creator == nullptr)
throw Exception(ErrorCodes::LOGICAL_ERROR, "CompressionCodecFactory: "
"the codec family {} has been provided a null constructor", family_name);
if (!family_name_with_codec.emplace(family_name, creator).second)
throw Exception(ErrorCodes::LOGICAL_ERROR, "CompressionCodecFactory: the codec family name '{}' is not unique", family_name);
if (byte_code)
if (!family_code_with_codec.emplace(*byte_code, creator).second)
throw Exception(ErrorCodes::LOGICAL_ERROR,
"CompressionCodecFactory: the codec family code '{}' is not unique",
std::to_string(*byte_code));
}
void CompressionCodecFactory::registerCompressionCodec(const String & family_name, std::optional<uint8_t> byte_code, Creator creator)
{
registerCompressionCodecWithType(family_name, byte_code, [family_name, creator](const ASTPtr & ast, const IDataType * /* data_type */)
{
return creator(ast);
});
}
void CompressionCodecFactory::registerSimpleCompressionCodec(
const String & family_name,
std::optional<uint8_t> byte_code,
SimpleCreator creator)
{
registerCompressionCodec(family_name, byte_code, [family_name, creator](const ASTPtr & ast)
{
if (ast)
throw Exception(ErrorCodes::DATA_TYPE_CANNOT_HAVE_ARGUMENTS, "Compression codec {} cannot have arguments", family_name);
return creator();
});
}
void registerCodecNone(CompressionCodecFactory & factory);
void registerCodecLZ4(CompressionCodecFactory & factory);
void registerCodecLZ4HC(CompressionCodecFactory & factory);
void registerCodecZSTD(CompressionCodecFactory & factory);
void registerCodecMultiple(CompressionCodecFactory & factory);
void registerCodecDeflateQpl(CompressionCodecFactory & factory);
/// Keeper use only general-purpose codecs, so we don't need these special codecs
/// in standalone build
#ifndef CLICKHOUSE_KEEPER_STANDALONE_BUILD
void registerCodecDelta(CompressionCodecFactory & factory);
void registerCodecT64(CompressionCodecFactory & factory);
void registerCodecDoubleDelta(CompressionCodecFactory & factory);
void registerCodecGorilla(CompressionCodecFactory & factory);
void registerCodecEncrypted(CompressionCodecFactory & factory);
void registerCodecFPC(CompressionCodecFactory & factory);
#endif
CompressionCodecFactory::CompressionCodecFactory()
{
registerCodecNone(*this);
registerCodecLZ4(*this);
registerCodecZSTD(*this);
registerCodecLZ4HC(*this);
registerCodecMultiple(*this);
#ifndef CLICKHOUSE_KEEPER_STANDALONE_BUILD
registerCodecDelta(*this);
registerCodecT64(*this);
registerCodecDoubleDelta(*this);
registerCodecGorilla(*this);
registerCodecEncrypted(*this);
registerCodecFPC(*this);
#ifdef ENABLE_QPL_COMPRESSION
registerCodecDeflateQpl(*this);
#endif
#endif
default_codec = get("LZ4", {});
}
CompressionCodecFactory & CompressionCodecFactory::instance()
{
static CompressionCodecFactory ret;
return ret;
}
}
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