BlockIO InterpreterSystemQuery::execute()
{
auto & query = typeid_cast<ASTSystemQuery &>(*query_ptr);
using Type = ASTSystemQuery::Type;
switch (query.type)
{
case Type::SHUTDOWN:
if (kill(0, SIGTERM))
throwFromErrno("System call kill(0, SIGTERM) failed", ErrorCodes::CANNOT_KILL);
break;
case Type::KILL:
if (kill(0, SIGKILL))
throwFromErrno("System call kill(0, SIGKILL) failed", ErrorCodes::CANNOT_KILL);
break;
case Type::DROP_DNS_CACHE:
DNSCache::instance().drop();
/// Reinitialize clusters to update their resolved_addresses
context.reloadClusterConfig();
break;
case Type::DROP_MARK_CACHE:
context.dropMarkCache();
break;
case Type::DROP_UNCOMPRESSED_CACHE:
context.dropUncompressedCache();
break;
case Type::RELOAD_DICTIONARY:
context.getExternalDictionaries().reloadDictionary(query.target_dictionary);
break;
case Type::RELOAD_DICTIONARIES:
{
auto status = getOverallExecutionStatusOfCommands(
[&] { context.getExternalDictionaries().reload(); },
[&] { context.getEmbeddedDictionaries().reload(); }
);
if (status.code != 0)
throw Exception(status.message, status.code);
break;
}
case Type::STOP_LISTEN_QUERIES:
case Type::START_LISTEN_QUERIES:
case Type::RESTART_REPLICAS:
case Type::SYNC_REPLICA:
case Type::STOP_MERGES:
case Type::START_MERGES:
case Type::STOP_REPLICATION_QUEUES:
case Type::START_REPLICATION_QUEUES:
throw Exception(String(ASTSystemQuery::typeToString(query.type)) + " is not supported yet", ErrorCodes::NOT_IMPLEMENTED);
default:
throw Exception("Unknown type of SYSTEM query", ErrorCodes::BAD_ARGUMENTS);
}
return BlockIO();
}
BlockIO InterpreterSystemQuery::execute()
{
auto & query = typeid_cast<ASTSystemQuery &>(*query_ptr);
using Type = ASTSystemQuery::Type;
/// Use global context with fresh system profile settings
Context system_context = context.getGlobalContext();
system_context.setSetting("profile", context.getSystemProfileName());
/// Make canonical query for simpler processing
if (!query.target_table.empty() && query.target_database.empty())
query.target_database = context.getCurrentDatabase();
switch (query.type)
{
case Type::SHUTDOWN:
if (kill(0, SIGTERM))
throwFromErrno("System call kill(0, SIGTERM) failed", ErrorCodes::CANNOT_KILL);
break;
case Type::KILL:
if (kill(0, SIGKILL))
throwFromErrno("System call kill(0, SIGKILL) failed", ErrorCodes::CANNOT_KILL);
break;
case Type::DROP_DNS_CACHE:
DNSResolver::instance().dropCache();
/// Reinitialize clusters to update their resolved_addresses
system_context.reloadClusterConfig();
break;
case Type::DROP_MARK_CACHE:
system_context.dropMarkCache();
break;
case Type::DROP_UNCOMPRESSED_CACHE:
system_context.dropUncompressedCache();
break;
case Type::RELOAD_DICTIONARY:
system_context.getExternalDictionaries().reloadDictionary(query.target_dictionary);
break;
case Type::RELOAD_DICTIONARIES:
{
auto status = getOverallExecutionStatusOfCommands(
[&] { system_context.getExternalDictionaries().reload(); },
[&] { system_context.getEmbeddedDictionaries().reload(); }
);
if (status.code != 0)
throw Exception(status.message, status.code);
break;
}
case Type::RELOAD_EMBEDDED_DICTIONARIES:
system_context.getEmbeddedDictionaries().reload();
break;
case Type::RELOAD_CONFIG:
system_context.reloadConfig();
break;
case Type::STOP_MERGES:
startStopAction(context, query, ActionLocks::PartsMerge, false);
break;
case Type::START_MERGES:
startStopAction(context, query, ActionLocks::PartsMerge, true);
break;
case Type::STOP_FETCHES:
startStopAction(context, query, ActionLocks::PartsFetch, false);
break;
case Type::START_FETCHES:
startStopAction(context, query, ActionLocks::PartsFetch, true);
break;
case Type::STOP_REPLICATED_SENDS:
startStopAction(context, query, ActionLocks::PartsSend, false);
break;
case Type::START_REPLICATEDS_SENDS:
startStopAction(context, query, ActionLocks::PartsSend, false);
break;
case Type::STOP_REPLICATION_QUEUES:
startStopAction(context, query, ActionLocks::ReplicationQueue, false);
break;
case Type::START_REPLICATION_QUEUES:
startStopAction(context, query, ActionLocks::ReplicationQueue, true);
break;
case Type::SYNC_REPLICA:
syncReplica(query);
break;
case Type::RESTART_REPLICAS:
restartReplicas(system_context);
break;
case Type::RESTART_REPLICA:
if (!tryRestartReplica(query.target_database, query.target_table, system_context))
throw Exception("There is no " + query.target_database + "." + query.target_table + " replicated table",
ErrorCodes::BAD_ARGUMENTS);
break;
case Type::STOP_LISTEN_QUERIES:
case Type::START_LISTEN_QUERIES:
throw Exception(String(ASTSystemQuery::typeToString(query.type)) + " is not supported yet", ErrorCodes::NOT_IMPLEMENTED);
default:
throw Exception("Unknown type of SYSTEM query", ErrorCodes::BAD_ARGUMENTS);
}
return BlockIO();
}