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scylladb/cql3/query_processor.cc
Pavel Emelyanov 1de235f4da query_processor: Keep migration manager onboard 
The query processor sits upper than the migration manager,
in the services layering, it's started after and (will be)
stopped before the migration manager.

The migration manager is needed in schema altering statements
which are called with query processor argument. They will
later get the migration manager from the query processor.

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
2021-03-15 19:00:58 +03:00

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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Copyright (C) 2015 ScyllaDB
*
* Modified by ScyllaDB
*/
/*
* This file is part of Scylla.
*
* Scylla is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Scylla is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
*/
#include "cql3/query_processor.hh"
#include <seastar/core/metrics.hh>
#include "cql3/CqlParser.hpp"
#include "cql3/error_collector.hh"
#include "cql3/statements/batch_statement.hh"
#include "cql3/util.hh"
#include "cql3/untyped_result_set.hh"
#include "db/config.hh"
#include "database.hh"
#include "hashers.hh"
namespace cql3 {
using namespace statements;
using namespace cql_transport::messages;
logging::logger log("query_processor");
logging::logger prep_cache_log("prepared_statements_cache");
logging::logger authorized_prepared_statements_cache_log("authorized_prepared_statements_cache");
const sstring query_processor::CQL_VERSION = "3.3.1";
const std::chrono::minutes prepared_statements_cache::entry_expiry = std::chrono::minutes(60);
class query_processor::internal_state {
service::query_state _qs;
public:
internal_state() : _qs(service::client_state::for_internal_calls(), empty_service_permit()) {
}
operator service::query_state&() {
return _qs;
}
operator const service::query_state&() const {
return _qs;
}
operator service::client_state&() {
return _qs.get_client_state();
}
operator const service::client_state&() const {
return _qs.get_client_state();
}
};
query_processor::query_processor(service::storage_proxy& proxy, database& db, service::migration_notifier& mn, service::migration_manager& mm, query_processor::memory_config mcfg, cql_config& cql_cfg)
: _migration_subscriber{std::make_unique<migration_subscriber>(this)}
, _proxy(proxy)
, _db(db)
, _mnotifier(mn)
, _mm(mm)
, _cql_config(cql_cfg)
, _internal_state(new internal_state())
, _prepared_cache(prep_cache_log, mcfg.prepared_statment_cache_size)
, _authorized_prepared_cache(std::min(std::chrono::milliseconds(_db.get_config().permissions_validity_in_ms()),
std::chrono::duration_cast<std::chrono::milliseconds>(prepared_statements_cache::entry_expiry)),
std::chrono::milliseconds(_db.get_config().permissions_update_interval_in_ms()),
mcfg.authorized_prepared_cache_size, authorized_prepared_statements_cache_log) {
namespace sm = seastar::metrics;
namespace stm = statements;
using clevel = db::consistency_level;
sm::label cl_label("consistency_level");
sm::label who_label("who"); // Who queried system tables
const auto user_who_label_instance = who_label("user");
const auto internal_who_label_instance = who_label("internal");
sm::label ks_label("ks");
const auto system_ks_label_instance = ks_label("system");
std::vector<sm::metric_definition> qp_group;
qp_group.push_back(sm::make_derive(
"statements_prepared",
_stats.prepare_invocations,
sm::description("Counts the total number of parsed CQL requests.")));
for (auto cl = size_t(clevel::MIN_VALUE); cl <= size_t(clevel::MAX_VALUE); ++cl) {
qp_group.push_back(
sm::make_derive(
"queries",
_stats.queries_by_cl[cl],
sm::description("Counts queries by consistency level."),
{cl_label(clevel(cl))}));
}
_metrics.add_group("query_processor", qp_group);
sm::label cas_label("conditional");
auto cas_label_instance = cas_label("yes");
auto non_cas_label_instance = cas_label("no");
_metrics.add_group(
"cql",
{
sm::make_derive(
"reads",
sm::description("Counts the total number of CQL SELECT requests."),
[this] {
// Reads fall into `cond_selector::NO_CONDITIONS' pigeonhole
return _cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::SELECT)
+ _cql_stats.query_cnt(source_selector::USER, ks_selector::NONSYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::SELECT)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::SELECT)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::NONSYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::SELECT);
}),
sm::make_derive(
"inserts",
sm::description("Counts the total number of CQL INSERT requests with/without conditions."),
{non_cas_label_instance},
[this] {
return _cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::INSERT)
+ _cql_stats.query_cnt(source_selector::USER, ks_selector::NONSYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::INSERT)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::INSERT)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::NONSYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::INSERT);
}),
sm::make_derive(
"inserts",
sm::description("Counts the total number of CQL INSERT requests with/without conditions."),
{cas_label_instance},
[this] {
return _cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::INSERT)
+ _cql_stats.query_cnt(source_selector::USER, ks_selector::NONSYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::INSERT)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::INSERT)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::NONSYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::INSERT);
}),
sm::make_derive(
"updates",
sm::description("Counts the total number of CQL UPDATE requests with/without conditions."),
{non_cas_label_instance},
[this] {
return _cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::UPDATE)
+ _cql_stats.query_cnt(source_selector::USER, ks_selector::NONSYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::UPDATE)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::UPDATE)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::NONSYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::UPDATE);
}),
sm::make_derive(
"updates",
sm::description("Counts the total number of CQL UPDATE requests with/without conditions."),
{cas_label_instance},
[this] {
return _cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::UPDATE)
+ _cql_stats.query_cnt(source_selector::USER, ks_selector::NONSYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::UPDATE)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::UPDATE)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::NONSYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::UPDATE);
}),
sm::make_derive(
"deletes",
sm::description("Counts the total number of CQL DELETE requests with/without conditions."),
{non_cas_label_instance},
[this] {
return _cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::DELETE)
+ _cql_stats.query_cnt(source_selector::USER, ks_selector::NONSYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::DELETE)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::DELETE)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::NONSYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::DELETE);
}),
sm::make_derive(
"deletes",
sm::description("Counts the total number of CQL DELETE requests with/without conditions."),
{cas_label_instance},
[this] {
return _cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::DELETE)
+ _cql_stats.query_cnt(source_selector::USER, ks_selector::NONSYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::DELETE)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::DELETE)
+ _cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::NONSYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::DELETE);
}),
sm::make_derive(
"reads_per_ks",
// Reads fall into `cond_selector::NO_CONDITIONS' pigeonhole
_cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::SELECT),
sm::description("Counts the number of CQL SELECT requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)"),
{user_who_label_instance, system_ks_label_instance}),
sm::make_derive(
"reads_per_ks",
_cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::SELECT),
sm::description("Counts the number of CQL SELECT requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)"),
{internal_who_label_instance, system_ks_label_instance}),
sm::make_derive(
"inserts_per_ks",
_cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::INSERT),
sm::description("Counts the number of CQL INSERT requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)."),
{user_who_label_instance, system_ks_label_instance, non_cas_label_instance}),
sm::make_derive(
"inserts_per_ks",
_cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::INSERT),
sm::description("Counts the number of CQL INSERT requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)."),
{internal_who_label_instance, system_ks_label_instance, non_cas_label_instance}),
sm::make_derive(
"inserts_per_ks",
_cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::INSERT),
sm::description("Counts the number of CQL INSERT requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)."),
{user_who_label_instance, system_ks_label_instance, cas_label_instance}),
sm::make_derive(
"inserts_per_ks",
_cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::INSERT),
sm::description("Counts the number of CQL INSERT requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)."),
{internal_who_label_instance, system_ks_label_instance, cas_label_instance}),
sm::make_derive(
"updates_per_ks",
_cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::UPDATE),
sm::description("Counts the number of CQL UPDATE requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)"),
{user_who_label_instance, system_ks_label_instance, non_cas_label_instance}),
sm::make_derive(
"updates_per_ks",
_cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::UPDATE),
sm::description("Counts the number of CQL UPDATE requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)"),
{internal_who_label_instance, system_ks_label_instance, non_cas_label_instance}),
sm::make_derive(
"updates_per_ks",
_cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::UPDATE),
sm::description("Counts the number of CQL UPDATE requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)"),
{user_who_label_instance, system_ks_label_instance, cas_label_instance}),
sm::make_derive(
"updates_per_ks",
_cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::UPDATE),
sm::description("Counts the number of CQL UPDATE requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)"),
{internal_who_label_instance, system_ks_label_instance, cas_label_instance}),
sm::make_derive(
"deletes_per_ks",
_cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::DELETE),
sm::description("Counts the number of CQL DELETE requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)"),
{user_who_label_instance, system_ks_label_instance, non_cas_label_instance}),
sm::make_derive(
"deletes_per_ks",
_cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::NO_CONDITIONS, stm::statement_type::DELETE),
sm::description("Counts the number of CQL DELETE requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)"),
{internal_who_label_instance, system_ks_label_instance, non_cas_label_instance}),
sm::make_derive(
"deletes_per_ks",
_cql_stats.query_cnt(source_selector::USER, ks_selector::SYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::DELETE),
sm::description("Counts the number of CQL DELETE requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)"),
{user_who_label_instance, system_ks_label_instance, cas_label_instance}),
sm::make_derive(
"deletes_per_ks",
_cql_stats.query_cnt(source_selector::INTERNAL, ks_selector::SYSTEM, cond_selector::WITH_CONDITIONS, stm::statement_type::DELETE),
sm::description("Counts the number of CQL DELETE requests executed on particular keyspaces. "
"Label `who' indicates where the reqs come from (clients or DB internals)"),
{internal_who_label_instance, system_ks_label_instance, cas_label_instance}),
sm::make_derive(
"batches",
_cql_stats.batches,
sm::description("Counts the total number of CQL BATCH requests without conditions."),
{non_cas_label_instance}),
sm::make_derive(
"batches",
_cql_stats.cas_batches,
sm::description("Counts the total number of CQL BATCH requests with conditions."),
{cas_label_instance}),
sm::make_derive(
"statements_in_batches",
_cql_stats.statements_in_batches,
sm::description("Counts the total number of sub-statements in CQL BATCH requests without conditions."),
{non_cas_label_instance}),
sm::make_derive(
"statements_in_batches",
_cql_stats.statements_in_cas_batches,
sm::description("Counts the total number of sub-statements in CQL BATCH requests with conditions."),
{cas_label_instance}),
sm::make_derive(
"batches_pure_logged",
_cql_stats.batches_pure_logged,
sm::description(
"Counts the total number of LOGGED batches that were executed as LOGGED batches.")),
sm::make_derive(
"batches_pure_unlogged",
_cql_stats.batches_pure_unlogged,
sm::description(
"Counts the total number of UNLOGGED batches that were executed as UNLOGGED "
"batches.")),
sm::make_derive(
"batches_unlogged_from_logged",
_cql_stats.batches_unlogged_from_logged,
sm::description("Counts the total number of LOGGED batches that were executed as UNLOGGED "
"batches.")),
sm::make_derive(
"rows_read",
_cql_stats.rows_read,
sm::description("Counts the total number of rows read during CQL requests.")),
sm::make_derive(
"prepared_cache_evictions",
[] { return prepared_statements_cache::shard_stats().prepared_cache_evictions; },
sm::description("Counts the number of prepared statements cache entries evictions.")),
sm::make_gauge(
"prepared_cache_size",
[this] { return _prepared_cache.size(); },
sm::description("A number of entries in the prepared statements cache.")),
sm::make_gauge(
"prepared_cache_memory_footprint",
[this] { return _prepared_cache.memory_footprint(); },
sm::description("Size (in bytes) of the prepared statements cache.")),
sm::make_derive(
"secondary_index_creates",
_cql_stats.secondary_index_creates,
sm::description("Counts the total number of CQL CREATE INDEX requests.")),
sm::make_derive(
"secondary_index_drops",
_cql_stats.secondary_index_drops,
sm::description("Counts the total number of CQL DROP INDEX requests.")),
// secondary_index_reads total count is also included in all cql reads
sm::make_derive(
"secondary_index_reads",
_cql_stats.secondary_index_reads,
sm::description("Counts the total number of CQL read requests performed using secondary indexes.")),
// secondary_index_rows_read total count is also included in all cql rows read
sm::make_derive(
"secondary_index_rows_read",
_cql_stats.secondary_index_rows_read,
sm::description("Counts the total number of rows read during CQL requests performed using secondary indexes.")),
// read requests that required ALLOW FILTERING
sm::make_derive(
"filtered_read_requests",
_cql_stats.filtered_reads,
sm::description("Counts the total number of CQL read requests that required ALLOW FILTERING. See filtered_rows_read_total to compare how many rows needed to be filtered.")),
// rows read with filtering enabled (because ALLOW FILTERING was required)
sm::make_derive(
"filtered_rows_read_total",
_cql_stats.filtered_rows_read_total,
sm::description("Counts the total number of rows read during CQL requests that required ALLOW FILTERING. See filtered_rows_matched_total and filtered_rows_dropped_total for information how accurate filtering queries are.")),
// rows read with filtering enabled and accepted by the filter
sm::make_derive(
"filtered_rows_matched_total",
_cql_stats.filtered_rows_matched_total,
sm::description("Counts the number of rows read during CQL requests that required ALLOW FILTERING and accepted by the filter. Number similar to filtered_rows_read_total indicates that filtering is accurate.")),
// rows read with filtering enabled and rejected by the filter
sm::make_derive(
"filtered_rows_dropped_total",
[this]() {return _cql_stats.filtered_rows_read_total - _cql_stats.filtered_rows_matched_total;},
sm::description("Counts the number of rows read during CQL requests that required ALLOW FILTERING and dropped by the filter. Number similar to filtered_rows_read_total indicates that filtering is not accurate and might cause performance degradation.")),
sm::make_derive(
"select_bypass_caches",
_cql_stats.select_bypass_caches,
sm::description("Counts the number of SELECT query executions with BYPASS CACHE option.")),
sm::make_derive(
"select_allow_filtering",
_cql_stats.select_allow_filtering,
sm::description("Counts the number of SELECT query executions with ALLOW FILTERING option.")),
sm::make_derive(
"select_partition_range_scan",
_cql_stats.select_partition_range_scan,
sm::description("Counts the number of SELECT query executions requiring partition range scan.")),
sm::make_derive(
"select_partition_range_scan_no_bypass_cache",
_cql_stats.select_partition_range_scan_no_bypass_cache,
sm::description("Counts the number of SELECT query executions requiring partition range scan without BYPASS CACHE option.")),
sm::make_derive(
"authorized_prepared_statements_cache_evictions",
[] { return authorized_prepared_statements_cache::shard_stats().authorized_prepared_statements_cache_evictions; },
sm::description("Counts the number of authenticated prepared statements cache entries evictions.")),
sm::make_gauge(
"authorized_prepared_statements_cache_size",
[this] { return _authorized_prepared_cache.size(); },
sm::description("Number of entries in the authenticated prepared statements cache.")),
sm::make_gauge(
"user_prepared_auth_cache_footprint",
[this] { return _authorized_prepared_cache.memory_footprint(); },
sm::description("Size (in bytes) of the authenticated prepared statements cache.")),
sm::make_counter(
"reverse_queries",
_cql_stats.reverse_queries,
sm::description("Counts the number of CQL SELECT requests with reverse ORDER BY order.")),
sm::make_counter(
"unpaged_select_queries",
[this] {
return _cql_stats.unpaged_select_queries(ks_selector::NONSYSTEM)
+ _cql_stats.unpaged_select_queries(ks_selector::SYSTEM);
},
sm::description("Counts the total number of unpaged CQL SELECT requests.")),
sm::make_counter(
"unpaged_select_queries_per_ks",
_cql_stats.unpaged_select_queries(ks_selector::SYSTEM),
sm::description("Counts the number of unpaged CQL SELECT requests against particular keyspaces."),
{system_ks_label_instance})
});
_mnotifier.register_listener(_migration_subscriber.get());
}
query_processor::~query_processor() {
}
future<> query_processor::stop() {
return _mnotifier.unregister_listener(_migration_subscriber.get()).then([this] {
return _authorized_prepared_cache.stop().finally([this] { return _prepared_cache.stop(); });
});
}
future<::shared_ptr<result_message>>
query_processor::execute_direct(const sstring_view& query_string, service::query_state& query_state, query_options& options) {
log.trace("execute_direct: \"{}\"", query_string);
tracing::trace(query_state.get_trace_state(), "Parsing a statement");
auto p = get_statement(query_string, query_state.get_client_state());
auto cql_statement = p->statement;
if (cql_statement->get_bound_terms() != options.get_values_count()) {
const auto msg = format("Invalid amount of bind variables: expected {:d} received {:d}",
cql_statement->get_bound_terms(),
options.get_values_count());
throw exceptions::invalid_request_exception(msg);
}
options.prepare(p->bound_names);
warn(unimplemented::cause::METRICS);
#if 0
if (!queryState.getClientState().isInternal)
metrics.regularStatementsExecuted.inc();
#endif
tracing::trace(query_state.get_trace_state(), "Processing a statement");
return cql_statement->check_access(_proxy, query_state.get_client_state()).then([this, cql_statement, &query_state, &options] () mutable {
return process_authorized_statement(std::move(cql_statement), query_state, options);
});
}
future<::shared_ptr<result_message>>
query_processor::execute_prepared(
statements::prepared_statement::checked_weak_ptr prepared,
cql3::prepared_cache_key_type cache_key,
service::query_state& query_state,
const query_options& options,
bool needs_authorization) {
::shared_ptr<cql_statement> statement = prepared->statement;
future<> fut = make_ready_future<>();
if (needs_authorization) {
fut = statement->check_access(_proxy, query_state.get_client_state()).then([this, &query_state, prepared = std::move(prepared), cache_key = std::move(cache_key)] () mutable {
return _authorized_prepared_cache.insert(*query_state.get_client_state().user(), std::move(cache_key), std::move(prepared)).handle_exception([this] (auto eptr) {
log.error("failed to cache the entry: {}", eptr);
});
});
}
log.trace("execute_prepared: \"{}\"", statement->raw_cql_statement);
return fut.then([this, statement = std::move(statement), &query_state, &options] () mutable {
return process_authorized_statement(std::move(statement), query_state, options);
});
}
future<::shared_ptr<result_message>>
query_processor::process_authorized_statement(const ::shared_ptr<cql_statement> statement, service::query_state& query_state, const query_options& options) {
auto& client_state = query_state.get_client_state();
++_stats.queries_by_cl[size_t(options.get_consistency())];
statement->validate(_proxy, client_state);
auto fut = statement->execute(*this, query_state, options);
return fut.then([statement] (auto msg) {
if (msg) {
return make_ready_future<::shared_ptr<result_message>>(std::move(msg));
}
return make_ready_future<::shared_ptr<result_message>>(::make_shared<result_message::void_message>());
});
}
future<::shared_ptr<cql_transport::messages::result_message::prepared>>
query_processor::prepare(sstring query_string, service::query_state& query_state) {
auto& client_state = query_state.get_client_state();
return prepare(std::move(query_string), client_state, client_state.is_thrift());
}
future<::shared_ptr<cql_transport::messages::result_message::prepared>>
query_processor::prepare(sstring query_string, const service::client_state& client_state, bool for_thrift) {
using namespace cql_transport::messages;
if (for_thrift) {
return prepare_one<result_message::prepared::thrift>(
std::move(query_string),
client_state,
compute_thrift_id, prepared_cache_key_type::thrift_id);
} else {
return prepare_one<result_message::prepared::cql>(
std::move(query_string),
client_state,
compute_id,
prepared_cache_key_type::cql_id);
}
}
static std::string hash_target(std::string_view query_string, std::string_view keyspace) {
std::string ret(keyspace);
ret += query_string;
return ret;
}
prepared_cache_key_type query_processor::compute_id(
std::string_view query_string,
std::string_view keyspace) {
return prepared_cache_key_type(md5_hasher::calculate(hash_target(query_string, keyspace)));
}
prepared_cache_key_type query_processor::compute_thrift_id(
const std::string_view& query_string,
const sstring& keyspace) {
uint32_t h = 0;
for (auto&& c : hash_target(query_string, keyspace)) {
h = 31*h + c;
}
return prepared_cache_key_type(static_cast<int32_t>(h));
}
std::unique_ptr<prepared_statement>
query_processor::get_statement(const sstring_view& query, const service::client_state& client_state) {
std::unique_ptr<raw::parsed_statement> statement = parse_statement(query);
// Set keyspace for statement that require login
auto cf_stmt = dynamic_cast<raw::cf_statement*>(statement.get());
if (cf_stmt) {
cf_stmt->prepare_keyspace(client_state);
}
++_stats.prepare_invocations;
auto p = statement->prepare(_db, _cql_stats);
p->statement->raw_cql_statement = sstring(query);
return p;
}
std::unique_ptr<raw::parsed_statement>
query_processor::parse_statement(const sstring_view& query) {
try {
auto statement = util::do_with_parser(query, std::mem_fn(&cql3_parser::CqlParser::query));
if (!statement) {
throw exceptions::syntax_exception("Parsing failed");
}
return statement;
} catch (const exceptions::recognition_exception& e) {
throw exceptions::syntax_exception(format("Invalid or malformed CQL query string: {}", e.what()));
} catch (const exceptions::cassandra_exception& e) {
throw;
} catch (const std::exception& e) {
log.error("The statement: {} could not be parsed: {}", query, e.what());
throw exceptions::syntax_exception(format("Failed parsing statement: [{}] reason: {}", query, e.what()));
}
}
query_options query_processor::make_internal_options(
const statements::prepared_statement::checked_weak_ptr& p,
const std::initializer_list<data_value>& values,
db::consistency_level cl,
int32_t page_size) const {
if (p->bound_names.size() != values.size()) {
throw std::invalid_argument(
format("Invalid number of values. Expecting {:d} but got {:d}", p->bound_names.size(), values.size()));
}
auto ni = p->bound_names.begin();
std::vector<cql3::raw_value> bound_values;
for (auto& v : values) {
auto& n = *ni++;
if (v.type() == bytes_type) {
bound_values.push_back(cql3::raw_value::make_value(value_cast<bytes>(v)));
} else if (v.is_null()) {
bound_values.push_back(cql3::raw_value::make_null());
} else {
bound_values.push_back(cql3::raw_value::make_value(n->type->decompose(v)));
}
}
if (page_size > 0) {
lw_shared_ptr<service::pager::paging_state> paging_state;
db::consistency_level serial_consistency = db::consistency_level::SERIAL;
api::timestamp_type ts = api::missing_timestamp;
return query_options(
cl,
bound_values,
cql3::query_options::specific_options{page_size, std::move(paging_state), serial_consistency, ts});
}
return query_options(cl, bound_values);
}
statements::prepared_statement::checked_weak_ptr query_processor::prepare_internal(const sstring& query_string) {
auto& p = _internal_statements[query_string];
if (p == nullptr) {
auto np = parse_statement(query_string)->prepare(_db, _cql_stats);
np->statement->raw_cql_statement = query_string;
np->statement->validate(_proxy, *_internal_state);
p = std::move(np); // inserts it into map
}
return p->checked_weak_from_this();
}
struct internal_query_state {
sstring query_string;
std::unique_ptr<query_options> opts;
statements::prepared_statement::checked_weak_ptr p;
bool more_results = true;
};
::shared_ptr<internal_query_state> query_processor::create_paged_state(
const sstring& query_string,
db::consistency_level cl,
const std::initializer_list<data_value>& values,
int32_t page_size) {
auto p = prepare_internal(query_string);
auto opts = make_internal_options(p, values, cl, page_size);
::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});
return res;
}
bool query_processor::has_more_results(::shared_ptr<cql3::internal_query_state> state) const {
if (state) {
return state->more_results;
}
return false;
}
future<> query_processor::for_each_cql_result(
::shared_ptr<cql3::internal_query_state> state,
std::function<stop_iteration(const cql3::untyped_result_set::row&)>&& f) {
return do_with(seastar::shared_ptr<bool>(), [f, this, state](auto& is_done) mutable {
is_done = seastar::make_shared<bool>(false);
auto stop_when = [is_done]() {
return *is_done;
};
auto do_resuls = [is_done, state, f, this]() mutable {
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<> query_processor::for_each_cql_result(
::shared_ptr<cql3::internal_query_state> state,
noncopyable_function<future<stop_iteration>(const cql3::untyped_result_set::row&)>&& f) {
// repeat can move the lambda's capture, so we need to hold f and it so the internal loop
// will be able to use it.
return do_with(noncopyable_function<future<stop_iteration>(const cql3::untyped_result_set::row&)>(std::move(f)),
untyped_result_set::rows_type::const_iterator(),
[state, this](noncopyable_function<future<stop_iteration>(const cql3::untyped_result_set::row&)>& f,
untyped_result_set::rows_type::const_iterator& it) mutable {
return repeat([state, &f, &it, this]() mutable {
return this->execute_paged_internal(state).then([state, &f, &it, this](::shared_ptr<cql3::untyped_result_set> msg) mutable {
it = msg->begin();
return repeat_until_value([&it, &f, msg, state, this]() mutable {
if (it == msg->end()) {
return make_ready_future<std::optional<stop_iteration>>(std::optional<stop_iteration>(!this->has_more_results(state)));
}
return f(*it).then([&it, msg](stop_iteration i) {
if (i == stop_iteration::yes) {
return std::optional<stop_iteration>(i);
}
++it;
return std::optional<stop_iteration>();
});
});
});
});
});
}
future<::shared_ptr<untyped_result_set>>
query_processor::execute_paged_internal(::shared_ptr<internal_query_state> state) {
return state->p->statement->execute(*this, *_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();
lw_shared_ptr<service::pager::paging_state> shrd = make_lw_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(
const sstring& query_string,
db::consistency_level cl,
const std::initializer_list<data_value>& values,
bool cache) {
return execute_internal(query_string, cl, *_internal_state, values, cache);
}
future<::shared_ptr<untyped_result_set>>
query_processor::execute_internal(
const sstring& query_string,
db::consistency_level cl,
service::query_state& query_state,
const std::initializer_list<data_value>& values,
bool cache) {
if (log.is_enabled(logging::log_level::trace)) {
log.trace("execute_internal: {}\"{}\" ({})", cache ? "(cached) " : "", query_string, ::join(", ", values));
}
if (cache) {
return execute_with_params(prepare_internal(query_string), cl, query_state, values);
} else {
auto p = parse_statement(query_string)->prepare(_db, _cql_stats);
p->statement->raw_cql_statement = query_string;
p->statement->validate(_proxy, *_internal_state);
auto checked_weak_ptr = p->checked_weak_from_this();
return execute_with_params(std::move(checked_weak_ptr), cl, query_state, values).finally([p = std::move(p)] {});
}
}
future<::shared_ptr<untyped_result_set>>
query_processor::execute_with_params(
statements::prepared_statement::checked_weak_ptr p,
db::consistency_level cl,
service::query_state& query_state,
const std::initializer_list<data_value>& values) {
auto opts = make_internal_options(p, values, cl);
return do_with(std::move(opts), [this, &query_state, p = std::move(p)](auto & opts) {
return p->statement->execute(*this, query_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::execute_batch(
::shared_ptr<statements::batch_statement> batch,
service::query_state& query_state,
query_options& options,
std::unordered_map<prepared_cache_key_type, authorized_prepared_statements_cache::value_type> pending_authorization_entries) {
return batch->check_access(_proxy, query_state.get_client_state()).then([this, &query_state, &options, batch, pending_authorization_entries = std::move(pending_authorization_entries)] () mutable {
return parallel_for_each(pending_authorization_entries, [this, &query_state] (auto& e) {
return _authorized_prepared_cache.insert(*query_state.get_client_state().user(), e.first, std::move(e.second)).handle_exception([this] (auto eptr) {
log.error("failed to cache the entry: {}", eptr);
});
}).then([this, &query_state, &options, batch] {
batch->validate();
batch->validate(_proxy, query_state.get_client_state());
_stats.queries_by_cl[size_t(options.get_consistency())] += batch->get_statements().size();
if (log.is_enabled(logging::log_level::trace)) {
std::ostringstream oss;
for (const auto& s: batch->get_statements()) {
oss << std::endl << s.statement->raw_cql_statement;
}
log.trace("execute_batch({}): {}", batch->get_statements().size(), oss.str());
}
return batch->execute(*this, 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::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) {
remove_invalid_prepared_statements(ks_name, view_name);
}
void query_processor::migration_subscriber::remove_invalid_prepared_statements(
sstring ks_name,
std::optional<sstring> cf_name) {
_qp->_prepared_cache.remove_if([&] (::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::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));
}
future<> query_processor::query_internal(
const sstring& query_string,
db::consistency_level cl,
const std::initializer_list<data_value>& values,
int32_t page_size,
noncopyable_function<future<stop_iteration>(const cql3::untyped_result_set_row&)>&& f) {
return for_each_cql_result(create_paged_state(query_string, cl, values, page_size), std::move(f));
}
future<> query_processor::query_internal(
const sstring& query_string,
noncopyable_function<future<stop_iteration>(const cql3::untyped_result_set_row&)>&& f) {
return query_internal(query_string, db::consistency_level::ONE, {}, 1000, std::move(f));
}
}
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