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#include <Backups/BackupInfo.h>
#include <Backups/BackupSettings.h>
#include <Core/SettingsFields.h>
#include <Parsers/ASTBackupQuery.h>
#include <Parsers/ASTFunction.h>
#include <Parsers/ASTSetQuery.h>
#include <Parsers/ASTLiteral.h>
#include <IO/ReadHelpers.h>
#include <Backups/SettingsFieldOptionalUUID.h>
namespace DB
{
namespace ErrorCodes
{
extern const int CANNOT_PARSE_BACKUP_SETTINGS;
extern const int WRONG_BACKUP_SETTINGS;
}
/// List of backup settings except base_backup_name and cluster_host_ids.
#define LIST_OF_BACKUP_SETTINGS(M) \
M(String, id) \
M(String, compression_method) \
M(String, password) \
M(String, s3_storage_class) \
M(Bool, structure_only) \
M(Bool, async) \
M(Bool, decrypt_files_from_encrypted_disks) \
M(Bool, deduplicate_files) \
M(Bool, allow_s3_native_copy) \
M(Bool, use_same_s3_credentials_for_base_backup) \
M(Bool, read_from_filesystem_cache) \
M(UInt64, shard_num) \
M(UInt64, replica_num) \
M(Bool, internal) \
M(String, host_id) \
M(OptionalUUID, backup_uuid)
/// M(Int64, compression_level)
BackupSettings BackupSettings::fromBackupQuery(const ASTBackupQuery & query)
{
BackupSettings res;
if (query.settings)
{
const auto & settings = query.settings->as<const ASTSetQuery &>().changes;
for (const auto & setting : settings)
{
if (setting.name == "compression_level")
res.compression_level = static_cast<int>(SettingFieldInt64{setting.value}.value);
else
#define GET_SETTINGS_FROM_BACKUP_QUERY_HELPER(TYPE, NAME) \
if (setting.name == #NAME) \
res.NAME = SettingField##TYPE{setting.value}.value; \
else
LIST_OF_BACKUP_SETTINGS(GET_SETTINGS_FROM_BACKUP_QUERY_HELPER)
throw Exception(ErrorCodes::CANNOT_PARSE_BACKUP_SETTINGS, "Unknown setting {}", setting.name);
}
}
if (query.base_backup_name)
res.base_backup_info = BackupInfo::fromAST(*query.base_backup_name);
if (query.cluster_host_ids)
res.cluster_host_ids = Util::clusterHostIDsFromAST(*query.cluster_host_ids);
return res;
}
void BackupSettings::copySettingsToQuery(ASTBackupQuery & query) const
{
auto query_settings = std::make_shared<ASTSetQuery>();
query_settings->is_standalone = false;
static const BackupSettings default_settings;
bool all_settings_are_default = true;
#define SET_SETTINGS_IN_BACKUP_QUERY_HELPER(TYPE, NAME) \
if ((NAME) != default_settings.NAME) \
{ \
query_settings->changes.emplace_back(#NAME, static_cast<Field>(SettingField##TYPE{NAME})); \
all_settings_are_default = false; \
}
LIST_OF_BACKUP_SETTINGS(SET_SETTINGS_IN_BACKUP_QUERY_HELPER)
if (all_settings_are_default)
query_settings = nullptr;
query.settings = query_settings;
auto base_backup_name = base_backup_info ? base_backup_info->toAST() : nullptr;
if (base_backup_name)
query.setOrReplace(query.base_backup_name, base_backup_name);
else
query.reset(query.base_backup_name);
query.cluster_host_ids = !cluster_host_ids.empty() ? Util::clusterHostIDsToAST(cluster_host_ids) : nullptr;
}
std::vector<Strings> BackupSettings::Util::clusterHostIDsFromAST(const IAST & ast)
{
std::vector<Strings> res;
const auto * array_of_shards = typeid_cast<const ASTFunction *>(&ast);
if (!array_of_shards || (array_of_shards->name != "array"))
throw Exception(
ErrorCodes::CANNOT_PARSE_BACKUP_SETTINGS,
"Setting cluster_host_ids has wrong format, must be array of arrays of string literals");
if (array_of_shards->arguments)
{
const ASTs shards = array_of_shards->arguments->children;
res.resize(shards.size());
for (size_t i = 0; i != shards.size(); ++i)
{
const auto * array_of_replicas = typeid_cast<const ASTLiteral *>(shards[i].get());
if (!array_of_replicas || (array_of_replicas->value.getType() != Field::Types::Array))
throw Exception(
ErrorCodes::CANNOT_PARSE_BACKUP_SETTINGS,
"Setting cluster_host_ids has wrong format, must be array of arrays of string literals");
const auto & replicas = array_of_replicas->value.get<const Array &>();
res[i].resize(replicas.size());
for (size_t j = 0; j != replicas.size(); ++j)
{
const auto & replica = replicas[j];
if (replica.getType() != Field::Types::String)
throw Exception(
ErrorCodes::CANNOT_PARSE_BACKUP_SETTINGS,
"Setting cluster_host_ids has wrong format, must be array of arrays of string literals");
res[i][j] = replica.get<const String &>();
}
}
}
return res;
}
ASTPtr BackupSettings::Util::clusterHostIDsToAST(const std::vector<Strings> & cluster_host_ids)
{
if (cluster_host_ids.empty())
return nullptr;
auto res = std::make_shared<ASTFunction>();
res->name = "array";
auto res_replicas = std::make_shared<ASTExpressionList>();
res->arguments = res_replicas;
res->children.push_back(res_replicas);
res_replicas->children.resize(cluster_host_ids.size());
for (size_t i = 0; i != cluster_host_ids.size(); ++i)
{
const auto & shard = cluster_host_ids[i];
Array res_shard;
res_shard.resize(shard.size());
for (size_t j = 0; j != shard.size(); ++j)
res_shard[j] = Field{shard[j]};
res_replicas->children[i] = std::make_shared<ASTLiteral>(Field{std::move(res_shard)});
}
return res;
}
std::pair<size_t, size_t> BackupSettings::Util::findShardNumAndReplicaNum(const std::vector<Strings> & cluster_host_ids, const String & host_id)
{
for (size_t i = 0; i != cluster_host_ids.size(); ++i)
{
for (size_t j = 0; j != cluster_host_ids[i].size(); ++j)
if (cluster_host_ids[i][j] == host_id)
return {i + 1, j + 1};
}
throw Exception(ErrorCodes::WRONG_BACKUP_SETTINGS,
"Cannot determine shard number or replica number, the current host {} is not found "
"in the cluster's hosts", host_id);
}
Strings BackupSettings::Util::filterHostIDs(const std::vector<Strings> & cluster_host_ids, size_t only_shard_num, size_t only_replica_num)
{
Strings collected_host_ids;
auto collect_replicas = [&](size_t shard_index)
{
const auto & shard = cluster_host_ids[shard_index - 1];
if (only_replica_num)
{
if (only_replica_num <= shard.size())
collected_host_ids.push_back(shard[only_replica_num - 1]);
}
else
{
for (size_t replica_index = 1; replica_index <= shard.size(); ++replica_index)
collected_host_ids.push_back(shard[replica_index - 1]);
}
};
if (only_shard_num)
{
if (only_shard_num <= cluster_host_ids.size())
collect_replicas(only_shard_num);
}
else
{
for (size_t shard_index = 1; shard_index <= cluster_host_ids.size(); ++shard_index)
collect_replicas(shard_index);
}
return collected_host_ids;
}
}
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