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044e05b0d9
The description parameter is used for the group 0 history mutation. The default is empty, in which case the mutation will leave the description column as `null`. I filled the parameter in some easy places as an example and left the rest for a follow-up. This is how it looks now in a fresh cluster with a single statement performed by the user: cqlsh> select * from system.group0_history ; key | state_id | description ---------+--------------------------------------+------------------------------------------------------ history | 9ec29cac-7547-11ec-cfd6-77bb9e31c952 | CQL DDL statement history | 9beb2526-7547-11ec-7b3e-3b198c757ef2 | null history | 9be937b6-7547-11ec-3b19-97e88bd1ca6f | null history | 9be784ca-7547-11ec-f297-f40f0073038e | null history | 9be52e14-7547-11ec-f7c5-af15a1a2de8c | null history | 9be335dc-7547-11ec-0b6d-f9798d005fb0 | null history | 9be160c2-7547-11ec-e0ea-29f4272345de | null history | 9bdf300e-7547-11ec-3d3f-e577a2e31ffd | null history | 9bdd2ea8-7547-11ec-c25d-8e297b77380e | null history | 9bdb925a-7547-11ec-d754-aa2cc394a22c | null history | 9bd8d830-7547-11ec-1550-5fd155e6cd86 | null history | 9bd36666-7547-11ec-230c-8702bc785cb9 | Add new columns to system_distributed.service_levels history | 9bd0a156-7547-11ec-a834-85eac94fd3b8 | Create system_distributed(_everywhere) tables history | 9bcfef18-7547-11ec-76d9-c23dfa1b3e6a | Create system_distributed_everywhere keyspace history | 9bcec89a-7547-11ec-e1b4-34e0010b4183 | Create system_distributed keyspace
128 lines
4.3 KiB
C++
128 lines
4.3 KiB
C++
/*
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*/
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/*
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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.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_keyspace(const sstring& ks_name) const
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{
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return false;
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}
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bool schema_altering_statement::depends_on_column_family(const sstring& 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<::shared_ptr<messages::result_message>>
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schema_altering_statement::execute0(query_processor& qp, service::query_state& state, const query_options& options) const {
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auto& mm = qp.get_migration_manager();
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::shared_ptr<cql_transport::event::schema_change> ce;
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if (mm.is_raft_enabled() && this_shard_id() != 0) {
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// execute all schema altering statements on a shard zero since this is where raft group 0 is
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co_return ::make_shared<cql_transport::messages::result_message::bounce_to_shard>(0,
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std::move(const_cast<cql3::query_options&>(options).take_cached_pk_function_calls()));
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}
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auto group0_guard = co_await mm.start_group0_operation();
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auto [ret, m] = co_await prepare_schema_mutations(qp, group0_guard.write_timestamp());
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if (!m.empty()) {
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// TODO: more specific description
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co_await mm.announce(std::move(m), std::move(group0_guard), "CQL DDL statement");
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}
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ce = std::move(ret);
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// If an IF [NOT] EXISTS clause was used, this may not result in an actual schema change. To avoid doing
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// extra work in the drivers to handle schema changes, we return an empty message in this case. (CASSANDRA-7600)
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if (!ce) {
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co_return ::make_shared<messages::result_message::void_message>();
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} else {
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co_return ::make_shared<messages::result_message::schema_change>(ce);
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}
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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 execute0(qp, 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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}
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}
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