08c81427b9
Usually, internal queries are used for short queries. Sometimes though,
like in the case of get compaction history, there could be a large
amount of results. Without paging it will overload the system.
This patch adds the ability to use paging internally.
Using paging will be done explicitely, all the relevant information
would be store in an internal_query_state, that would hold both the
paging state but also the query so consecutive calls can be made.
To use paging use the query method with a function.
The function gets beside a statement and its parameters a function that
will be used for each of the returned rows.
For example if qp is a query_processor:
qp.query("SELECT * from system.compaction_history", [] (const cql3::untyped_result_set::row& row) {
....
// do something with row
...
return stop_iteration::no; // keep on reading
});
Will run the function on each of the compaction history table rows.
To stop the iteration, the function can return stop_iteration::yes.
636 lines
26 KiB
C++
636 lines
26 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Copyright (C) 2015 ScyllaDB
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*
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* Modified by ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <seastar/core/metrics.hh>
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#include "cql3/query_processor.hh"
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#include "cql3/CqlParser.hpp"
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#include "cql3/error_collector.hh"
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#include "cql3/statements/batch_statement.hh"
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#include "cql3/util.hh"
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#include "transport/messages/result_message.hh"
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#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1
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#include <cryptopp/md5.h>
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namespace cql3 {
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using namespace statements;
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using namespace cql_transport::messages;
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logging::logger log("query_processor");
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distributed<query_processor> _the_query_processor;
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const sstring query_processor::CQL_VERSION = "3.3.1";
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class query_processor::internal_state {
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service::query_state _qs;
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public:
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internal_state()
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: _qs(service::client_state{service::client_state::internal_tag()})
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{ }
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operator service::query_state&() {
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return _qs;
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}
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operator const service::query_state&() const {
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return _qs;
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}
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operator service::client_state&() {
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return _qs.get_client_state();
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}
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operator const service::client_state&() const {
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return _qs.get_client_state();
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}
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api::timestamp_type next_timestamp() {
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return _qs.get_client_state().get_timestamp();
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}
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};
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api::timestamp_type query_processor::next_timestamp() {
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return _internal_state->next_timestamp();
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}
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query_processor::query_processor(distributed<service::storage_proxy>& proxy,
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distributed<database>& db)
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: _migration_subscriber{std::make_unique<migration_subscriber>(this)}
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, _proxy(proxy)
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, _db(db)
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, _internal_state(new internal_state())
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{
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namespace sm = seastar::metrics;
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_metrics.add_group("query_processor", {
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sm::make_derive("statements_prepared", _stats.prepare_invocations,
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sm::description("Counts a total number of parsed CQL requests.")),
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});
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_metrics.add_group("cql", {
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sm::make_derive("reads", _cql_stats.reads,
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sm::description("Counts a total number of CQL read requests.")),
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sm::make_derive("inserts", _cql_stats.inserts,
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sm::description("Counts a total number of CQL INSERT requests.")),
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sm::make_derive("updates", _cql_stats.updates,
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sm::description("Counts a total number of CQL UPDATE requests.")),
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sm::make_derive("deletes", _cql_stats.deletes,
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sm::description("Counts a total number of CQL DELETE requests.")),
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sm::make_derive("batches", _cql_stats.batches,
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sm::description("Counts a total number of CQL BATCH requests.")),
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sm::make_derive("statements_in_batches", _cql_stats.statements_in_batches,
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sm::description("Counts a total number of sub-statements in CQL BATCH requests.")),
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sm::make_derive("batches_pure_logged", _cql_stats.batches_pure_logged,
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sm::description("Counts a total number of LOGGED batches that were executed as LOGGED batches.")),
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sm::make_derive("batches_pure_unlogged", _cql_stats.batches_pure_unlogged,
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sm::description("Counts a total number of UNLOGGED batches that were executed as UNLOGGED batches.")),
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sm::make_derive("batches_unlogged_from_logged", _cql_stats.batches_unlogged_from_logged,
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sm::description("Counts a total number of LOGGED batches that were executed as UNLOGGED batches.")),
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});
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service::get_local_migration_manager().register_listener(_migration_subscriber.get());
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}
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query_processor::~query_processor()
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{}
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future<> query_processor::stop()
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{
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service::get_local_migration_manager().unregister_listener(_migration_subscriber.get());
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return make_ready_future<>();
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}
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future<::shared_ptr<result_message>>
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query_processor::process(const sstring_view& query_string, service::query_state& query_state, query_options& options)
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{
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log.trace("process: \"{}\"", query_string);
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tracing::trace(query_state.get_trace_state(), "Parsing a statement");
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auto p = get_statement(query_string, query_state.get_client_state());
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options.prepare(p->bound_names);
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auto cql_statement = p->statement;
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if (cql_statement->get_bound_terms() != options.get_values_count()) {
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throw exceptions::invalid_request_exception("Invalid amount of bind variables");
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}
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warn(unimplemented::cause::METRICS);
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#if 0
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if (!queryState.getClientState().isInternal)
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metrics.regularStatementsExecuted.inc();
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#endif
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tracing::trace(query_state.get_trace_state(), "Processing a statement");
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return process_statement(std::move(cql_statement), query_state, options);
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}
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future<::shared_ptr<result_message>>
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query_processor::process_statement(::shared_ptr<cql_statement> statement,
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service::query_state& query_state,
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const query_options& options)
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{
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#if 0
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logger.trace("Process {} @CL.{}", statement, options.getConsistency());
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#endif
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return statement->check_access(query_state.get_client_state()).then([this, statement, &query_state, &options]() {
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auto& client_state = query_state.get_client_state();
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statement->validate(_proxy, client_state);
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auto fut = make_ready_future<::shared_ptr<cql_transport::messages::result_message>>();
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if (client_state.is_internal()) {
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fut = statement->execute_internal(_proxy, query_state, options);
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} else {
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fut = statement->execute(_proxy, query_state, options);
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}
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return fut.then([statement] (auto msg) {
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if (msg) {
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return make_ready_future<::shared_ptr<result_message>>(std::move(msg));
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}
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return make_ready_future<::shared_ptr<result_message>>(
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::make_shared<result_message::void_message>());
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});
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});
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}
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future<::shared_ptr<cql_transport::messages::result_message::prepared>>
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query_processor::prepare(const std::experimental::string_view& query_string, service::query_state& query_state)
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{
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auto& client_state = query_state.get_client_state();
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return prepare(query_string, client_state, client_state.is_thrift());
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}
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future<::shared_ptr<cql_transport::messages::result_message::prepared>>
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query_processor::prepare(const std::experimental::string_view& query_string,
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const service::client_state& client_state,
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bool for_thrift)
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{
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auto existing = get_stored_prepared_statement(query_string, client_state.get_raw_keyspace(), for_thrift);
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if (existing) {
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return make_ready_future<::shared_ptr<cql_transport::messages::result_message::prepared>>(existing);
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}
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return futurize<::shared_ptr<cql_transport::messages::result_message::prepared>>::apply([this, &query_string, &client_state, for_thrift] {
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auto prepared = get_statement(query_string, client_state);
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auto bound_terms = prepared->statement->get_bound_terms();
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if (bound_terms > std::numeric_limits<uint16_t>::max()) {
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throw exceptions::invalid_request_exception(sprint("Too many markers(?). %d markers exceed the allowed maximum of %d", bound_terms, std::numeric_limits<uint16_t>::max()));
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}
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assert(bound_terms == prepared->bound_names.size());
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return store_prepared_statement(query_string, client_state.get_raw_keyspace(), std::move(prepared), for_thrift);
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});
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}
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::shared_ptr<cql_transport::messages::result_message::prepared>
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query_processor::get_stored_prepared_statement(const std::experimental::string_view& query_string,
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const sstring& keyspace,
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bool for_thrift)
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{
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if (for_thrift) {
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auto statement_id = compute_thrift_id(query_string, keyspace);
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auto it = _thrift_prepared_statements.find(statement_id);
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if (it == _thrift_prepared_statements.end()) {
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return ::shared_ptr<result_message::prepared>();
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}
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return ::make_shared<result_message::prepared::thrift>(statement_id, it->second->checked_weak_from_this());
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} else {
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auto statement_id = compute_id(query_string, keyspace);
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auto it = _prepared_statements.find(statement_id);
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if (it == _prepared_statements.end()) {
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return ::shared_ptr<result_message::prepared>();
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}
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return ::make_shared<result_message::prepared::cql>(statement_id, it->second->checked_weak_from_this());
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}
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}
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future<::shared_ptr<cql_transport::messages::result_message::prepared>>
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query_processor::store_prepared_statement(const std::experimental::string_view& query_string,
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const sstring& keyspace,
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std::unique_ptr<statements::prepared_statement> prepared,
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bool for_thrift)
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{
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#if 0
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// Concatenate the current keyspace so we don't mix prepared statements between keyspace (#5352).
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// (if the keyspace is null, queryString has to have a fully-qualified keyspace so it's fine.
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long statementSize = measure(prepared.statement);
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// don't execute the statement if it's bigger than the allowed threshold
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if (statementSize > MAX_CACHE_PREPARED_MEMORY)
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throw new InvalidRequestException(String.format("Prepared statement of size %d bytes is larger than allowed maximum of %d bytes.",
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statementSize,
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MAX_CACHE_PREPARED_MEMORY));
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#endif
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prepared->raw_cql_statement = query_string.data();
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if (for_thrift) {
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auto statement_id = compute_thrift_id(query_string, keyspace);
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auto msg = ::make_shared<result_message::prepared::thrift>(statement_id, prepared->checked_weak_from_this());
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_thrift_prepared_statements.emplace(statement_id, std::move(prepared));
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return make_ready_future<::shared_ptr<result_message::prepared>>(std::move(msg));
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} else {
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auto statement_id = compute_id(query_string, keyspace);
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auto msg = ::make_shared<result_message::prepared::cql>(statement_id, prepared->checked_weak_from_this());
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_prepared_statements.emplace(statement_id, std::move(prepared));
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return make_ready_future<::shared_ptr<result_message::prepared>>(std::move(msg));
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}
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}
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static bytes md5_calculate(const std::experimental::string_view& s)
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{
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constexpr size_t size = CryptoPP::Weak1::MD5::DIGESTSIZE;
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CryptoPP::Weak::MD5 hash;
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unsigned char digest[size];
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hash.CalculateDigest(digest, reinterpret_cast<const unsigned char*>(s.data()), s.size());
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return std::move(bytes{reinterpret_cast<const int8_t*>(digest), size});
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}
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static sstring hash_target(const std::experimental::string_view& query_string, const sstring& keyspace) {
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return keyspace + query_string.to_string();
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}
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bytes query_processor::compute_id(const std::experimental::string_view& query_string, const sstring& keyspace)
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{
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return md5_calculate(hash_target(query_string, keyspace));
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}
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int32_t query_processor::compute_thrift_id(const std::experimental::string_view& query_string, const sstring& keyspace)
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{
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auto target = hash_target(query_string, keyspace);
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uint32_t h = 0;
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for (auto&& c : hash_target(query_string, keyspace)) {
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h = 31*h + c;
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}
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return static_cast<int32_t>(h);
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}
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std::unique_ptr<prepared_statement>
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query_processor::get_statement(const sstring_view& query, const service::client_state& client_state)
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{
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#if 0
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Tracing.trace("Parsing {}", queryStr);
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#endif
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::shared_ptr<raw::parsed_statement> statement = parse_statement(query);
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// Set keyspace for statement that require login
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auto cf_stmt = dynamic_pointer_cast<raw::cf_statement>(statement);
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if (cf_stmt) {
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cf_stmt->prepare_keyspace(client_state);
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}
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#if 0
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Tracing.trace("Preparing statement");
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#endif
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++_stats.prepare_invocations;
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return statement->prepare(_db.local(), _cql_stats);
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}
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::shared_ptr<raw::parsed_statement>
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query_processor::parse_statement(const sstring_view& query)
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{
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try {
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auto statement = util::do_with_parser(query, std::mem_fn(&cql3_parser::CqlParser::query));
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if (!statement) {
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throw exceptions::syntax_exception("Parsing failed");
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}
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return statement;
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} catch (const exceptions::recognition_exception& e) {
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throw exceptions::syntax_exception(sprint("Invalid or malformed CQL query string: %s", e.what()));
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} catch (const exceptions::cassandra_exception& e) {
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throw;
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} catch (const std::exception& e) {
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log.error("The statement: {} could not be parsed: {}", query, e.what());
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throw exceptions::syntax_exception(sprint("Failed parsing statement: [%s] reason: %s", query, e.what()));
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}
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}
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query_options query_processor::make_internal_options(const statements::prepared_statement::checked_weak_ptr& p,
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const std::initializer_list<data_value>& values,
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db::consistency_level cl,
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int32_t page_size)
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{
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if (p->bound_names.size() != values.size()) {
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throw std::invalid_argument(sprint("Invalid number of values. Expecting %d but got %d", p->bound_names.size(), values.size()));
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}
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auto ni = p->bound_names.begin();
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std::vector<cql3::raw_value> bound_values;
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for (auto& v : values) {
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auto& n = *ni++;
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if (v.type() == bytes_type) {
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bound_values.push_back(cql3::raw_value::make_value(value_cast<bytes>(v)));
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} else if (v.is_null()) {
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bound_values.push_back(cql3::raw_value::make_null());
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} else {
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bound_values.push_back(cql3::raw_value::make_value(n->type->decompose(v)));
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}
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}
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if (page_size > 0) {
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::shared_ptr<service::pager::paging_state> paging_state;
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db::consistency_level serial_consistency = db::consistency_level::SERIAL;
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api::timestamp_type ts = api::missing_timestamp;
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return query_options(cl, bound_values, cql3::query_options::specific_options{page_size, std::move(paging_state), serial_consistency, ts});
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}
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return query_options(cl, bound_values);
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}
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statements::prepared_statement::checked_weak_ptr query_processor::prepare_internal(const sstring& query_string)
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{
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auto& p = _internal_statements[query_string];
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if (p == nullptr) {
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auto np = parse_statement(query_string)->prepare(_db.local(), _cql_stats);
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np->statement->validate(_proxy, *_internal_state);
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p = std::move(np); // inserts it into map
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}
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return p->checked_weak_from_this();
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}
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future<::shared_ptr<untyped_result_set>>
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query_processor::execute_internal(const sstring& query_string,
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const std::initializer_list<data_value>& values)
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{
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if (log.is_enabled(logging::log_level::trace)) {
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log.trace("execute_internal: \"{}\" ({})", query_string, ::join(", ", values));
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}
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return execute_internal(prepare_internal(query_string), values);
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}
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struct internal_query_state {
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sstring query_string;
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std::unique_ptr<query_options> opts;
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statements::prepared_statement::checked_weak_ptr p;
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bool more_results = true;
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};
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::shared_ptr<internal_query_state> query_processor::create_paged_state(const sstring& query_string,
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const std::initializer_list<data_value>& values, int32_t page_size) {
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auto p = prepare_internal(query_string);
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auto opts = make_internal_options(p, values, db::consistency_level::ONE, page_size);
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::shared_ptr<internal_query_state> res = ::make_shared<internal_query_state>(internal_query_state{query_string, std::make_unique<cql3::query_options>(std::move(opts)), std::move(p), true});
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return res;
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}
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bool query_processor::has_more_results(::shared_ptr<cql3::internal_query_state> state) const {
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if (state) {
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return state->more_results;
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}
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return false;
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}
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future<> query_processor::for_each_cql_result(::shared_ptr<cql3::internal_query_state> state,
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std::function<stop_iteration(const cql3::untyped_result_set::row&)>&& f) {
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return do_with(seastar::shared_ptr<bool>(), [f, this, state](auto& is_done) mutable {
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is_done = seastar::make_shared<bool>(false);
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auto stop_when = [is_done]() {
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return *is_done;
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};
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auto do_resuls = [is_done, state, f, this]() mutable {
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return this->execute_paged_internal(state).then([is_done, state, f, this](::shared_ptr<cql3::untyped_result_set> msg) mutable {
|
|
if (msg->empty()) {
|
|
*is_done = true;
|
|
} else {
|
|
if (!this->has_more_results(state)) {
|
|
*is_done = true;
|
|
}
|
|
for (auto& row : *msg) {
|
|
if (f(row) == stop_iteration::yes) {
|
|
*is_done = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
});
|
|
};
|
|
return do_until(stop_when, do_resuls);
|
|
});
|
|
}
|
|
|
|
future<::shared_ptr<untyped_result_set>> query_processor::execute_paged_internal(::shared_ptr<internal_query_state> state) {
|
|
return state->p->statement->execute_internal(_proxy, *_internal_state, *state->opts).then(
|
|
[state, this](::shared_ptr<cql_transport::messages::result_message> msg) mutable {
|
|
class visitor : public result_message::visitor_base {
|
|
::shared_ptr<internal_query_state> _state;
|
|
query_processor& _qp;
|
|
public:
|
|
visitor(::shared_ptr<internal_query_state> state, query_processor& qp) : _state(state), _qp(qp) {
|
|
}
|
|
virtual ~visitor() = default;
|
|
void visit(const result_message::rows& rmrs) override {
|
|
auto& rs = rmrs.rs();
|
|
if (rs.get_metadata().paging_state()) {
|
|
bool done = !rs.get_metadata().flags().contains<cql3::metadata::flag::HAS_MORE_PAGES>();
|
|
|
|
if (done) {
|
|
_state->more_results = false;
|
|
} else {
|
|
const service::pager::paging_state& st = *rs.get_metadata().paging_state();
|
|
shared_ptr<service::pager::paging_state> shrd = ::make_shared<service::pager::paging_state>(st);
|
|
_state->opts = std::make_unique<query_options>(std::move(_state->opts), shrd);
|
|
_state->p = _qp.prepare_internal(_state->query_string);
|
|
}
|
|
} else {
|
|
_state->more_results = false;
|
|
}
|
|
}
|
|
};
|
|
visitor v(state, *this);
|
|
if (msg != nullptr) {
|
|
msg->accept(v);
|
|
}
|
|
return make_ready_future<::shared_ptr<untyped_result_set>>(::make_shared<untyped_result_set>(msg));
|
|
});
|
|
}
|
|
|
|
future<::shared_ptr<untyped_result_set>>
|
|
query_processor::execute_internal(statements::prepared_statement::checked_weak_ptr p,
|
|
const std::initializer_list<data_value>& values)
|
|
{
|
|
query_options opts = make_internal_options(p, values);
|
|
return do_with(std::move(opts), [this, p = std::move(p)](auto& opts) {
|
|
return p->statement->execute_internal(_proxy, *_internal_state, opts).then([&opts, stmt = p->statement](auto msg) {
|
|
return make_ready_future<::shared_ptr<untyped_result_set>>(::make_shared<untyped_result_set>(msg));
|
|
});
|
|
});
|
|
}
|
|
|
|
future<::shared_ptr<untyped_result_set>>
|
|
query_processor::process(const sstring& query_string,
|
|
db::consistency_level cl,
|
|
const std::initializer_list<data_value>& values,
|
|
bool cache)
|
|
{
|
|
if (cache) {
|
|
return process(prepare_internal(query_string), cl, values);
|
|
} else {
|
|
auto p = parse_statement(query_string)->prepare(_db.local(), _cql_stats);
|
|
p->statement->validate(_proxy, *_internal_state);
|
|
auto checked_weak_ptr = p->checked_weak_from_this();
|
|
return process(std::move(checked_weak_ptr), cl, values).finally([p = std::move(p)] {});
|
|
}
|
|
}
|
|
|
|
future<::shared_ptr<untyped_result_set>>
|
|
query_processor::process(statements::prepared_statement::checked_weak_ptr p,
|
|
db::consistency_level cl,
|
|
const std::initializer_list<data_value>& values)
|
|
{
|
|
auto opts = make_internal_options(p, values, cl);
|
|
return do_with(std::move(opts), [this, p = std::move(p)](auto & opts) {
|
|
return p->statement->execute(_proxy, *_internal_state, opts).then([](auto msg) {
|
|
return make_ready_future<::shared_ptr<untyped_result_set>>(::make_shared<untyped_result_set>(msg));
|
|
});
|
|
});
|
|
}
|
|
|
|
future<::shared_ptr<cql_transport::messages::result_message>>
|
|
query_processor::process_batch(::shared_ptr<statements::batch_statement> batch,
|
|
service::query_state& query_state,
|
|
query_options& options)
|
|
{
|
|
return batch->check_access(query_state.get_client_state()).then([this, &query_state, &options, batch] {
|
|
batch->validate();
|
|
batch->validate(_proxy, query_state.get_client_state());
|
|
return batch->execute(_proxy, query_state, options);
|
|
});
|
|
}
|
|
|
|
query_processor::migration_subscriber::migration_subscriber(query_processor* qp)
|
|
: _qp{qp}
|
|
{
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_create_keyspace(const sstring& ks_name)
|
|
{
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_create_column_family(const sstring& ks_name, const sstring& cf_name)
|
|
{
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_create_user_type(const sstring& ks_name, const sstring& type_name)
|
|
{
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_create_function(const sstring& ks_name, const sstring& function_name)
|
|
{
|
|
log.warn("{} event ignored", __func__);
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_create_aggregate(const sstring& ks_name, const sstring& aggregate_name)
|
|
{
|
|
log.warn("{} event ignored", __func__);
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_create_view(const sstring& ks_name, const sstring& view_name)
|
|
{
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_update_keyspace(const sstring& ks_name)
|
|
{
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_update_column_family(const sstring& ks_name, const sstring& cf_name, bool columns_changed)
|
|
{
|
|
// #1255: Ignoring columns_changed deliberately.
|
|
log.info("Column definitions for {}.{} changed, invalidating related prepared statements", ks_name, cf_name);
|
|
remove_invalid_prepared_statements(ks_name, cf_name);
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_update_user_type(const sstring& ks_name, const sstring& type_name)
|
|
{
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_update_function(const sstring& ks_name, const sstring& function_name)
|
|
{
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_update_aggregate(const sstring& ks_name, const sstring& aggregate_name)
|
|
{
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_update_view(const sstring& ks_name, const sstring& view_name, bool columns_changed)
|
|
{
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_drop_keyspace(const sstring& ks_name)
|
|
{
|
|
remove_invalid_prepared_statements(ks_name, std::experimental::nullopt);
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_drop_column_family(const sstring& ks_name, const sstring& cf_name)
|
|
{
|
|
remove_invalid_prepared_statements(ks_name, cf_name);
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_drop_user_type(const sstring& ks_name, const sstring& type_name)
|
|
{
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_drop_function(const sstring& ks_name, const sstring& function_name)
|
|
{
|
|
log.warn("{} event ignored", __func__);
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_drop_aggregate(const sstring& ks_name, const sstring& aggregate_name)
|
|
{
|
|
log.warn("{} event ignored", __func__);
|
|
}
|
|
|
|
void query_processor::migration_subscriber::on_drop_view(const sstring& ks_name, const sstring& view_name)
|
|
{
|
|
}
|
|
|
|
void query_processor::migration_subscriber::remove_invalid_prepared_statements(sstring ks_name, std::experimental::optional<sstring> cf_name)
|
|
{
|
|
_qp->invalidate_prepared_statements([&] (::shared_ptr<cql_statement> stmt) {
|
|
return this->should_invalidate(ks_name, cf_name, stmt);
|
|
});
|
|
}
|
|
|
|
bool query_processor::migration_subscriber::should_invalidate(sstring ks_name, std::experimental::optional<sstring> cf_name, ::shared_ptr<cql_statement> statement)
|
|
{
|
|
return statement->depends_on_keyspace(ks_name) && (!cf_name || statement->depends_on_column_family(*cf_name));
|
|
}
|
|
|
|
}
|