c42a91ec72
Currently we hold group0_guard only during DDL statement's execute() function, but unfortunately some statements access underlying schema state also during check_access() and validate() calls which are called by the query_processor before it calls execute. We need to cover those calls with group0_guard as well and also move retry loop up. This patch does it by introducing new function to cql_statement class take_guard(). Schema altering statements return group0 guard while others do not return any guard. Query processor takes this guard at the beginning of a statement execution and retries if service::group0_concurrent_modification is thrown. The guard is passed to the execute in query_state structure. Fixes: #13942 Message-Id: <ZJ2aeNIBQCtnTaE2@scylladb.com>
95 lines
3.2 KiB
C++
95 lines
3.2 KiB
C++
/*
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* Copyright (C) 2015-present ScyllaDB
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*
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* Modified by ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: (AGPL-3.0-or-later and Apache-2.0)
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*/
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#include <seastar/core/coroutine.hh>
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#include "cql3/statements/schema_altering_statement.hh"
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#include "locator/abstract_replication_strategy.hh"
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#include "data_dictionary/data_dictionary.hh"
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#include "mutation/mutation.hh"
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#include "cql3/query_processor.hh"
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#include "transport/messages/result_message.hh"
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#include "service/raft/raft_group_registry.hh"
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#include "service/migration_manager.hh"
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namespace cql3 {
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namespace statements {
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schema_altering_statement::schema_altering_statement(timeout_config_selector timeout_selector)
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: cf_statement(cf_name())
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, cql_statement_no_metadata(timeout_selector)
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, _is_column_family_level{false}
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{
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}
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schema_altering_statement::schema_altering_statement(cf_name name, timeout_config_selector timeout_selector)
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: cf_statement{std::move(name)}
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, cql_statement_no_metadata(timeout_selector)
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, _is_column_family_level{true}
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{
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}
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future<> schema_altering_statement::grant_permissions_to_creator(const service::client_state&) const {
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return make_ready_future<>();
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}
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bool schema_altering_statement::depends_on(std::string_view ks_name, std::optional<std::string_view> cf_name) const
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{
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return false;
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}
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uint32_t schema_altering_statement::get_bound_terms() const
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{
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return 0;
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}
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void schema_altering_statement::prepare_keyspace(const service::client_state& state)
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{
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if (_is_column_family_level) {
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cf_statement::prepare_keyspace(state);
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}
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}
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future<std::unique_ptr<statement_guard>> schema_altering_statement::take_guard(query_processor& qp) const {
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return qp.take_alter_schema_guard();
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}
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future<::shared_ptr<messages::result_message>>
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schema_altering_statement::execute(query_processor& qp, service::query_state& state, const query_options& options) const {
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bool internal = state.get_client_state().is_internal();
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if (internal) {
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auto replication_type = locator::replication_strategy_type::everywhere_topology;
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data_dictionary::database db = qp.db();
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if (_cf_name && _cf_name->has_keyspace()) {
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const auto& ks = db.find_keyspace(_cf_name->get_keyspace());
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replication_type = ks.get_replication_strategy().get_type();
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}
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if (replication_type != locator::replication_strategy_type::local) {
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sstring info = _cf_name ? _cf_name->to_string() : "schema";
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throw std::logic_error(format("Attempted to modify {} via internal query: such schema changes are not propagated and thus illegal", info));
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}
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}
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return qp.execute_schema_statement(*this, state, options).then([this, &state, internal](::shared_ptr<messages::result_message> result) {
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auto permissions_granted_fut = internal
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? make_ready_future<>()
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: grant_permissions_to_creator(state.get_client_state());
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return permissions_granted_fut.then([result = std::move(result)] {
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return result;
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});
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});
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}
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schema_altering_statement::guard::guard(service::group0_guard&& g,service::migration_manager& mm_, gate::holder&& h)
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: statement_guard(mm_.get_concurrent_ddl_retries()), group0_guard(std::move(g)), mm(mm_), mm_holder(std::move(h)) {}
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}
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}
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