93db4d748c
All internal execution always uses query text as a key in the cache of internal prepared statements. There is no need to publish API for executing an internal prepared statement object. The folded execute_internal() calls an internal prepare() and then internal execute(). execute_internal(cache=true) does exactly that.
101 lines
3.2 KiB
C++
101 lines
3.2 KiB
C++
/*
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* Copyright (C) 2015 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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#pragma once
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#include <memory>
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#include <seastar/core/sharded.hh>
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#include <seastar/core/future.hh>
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#include "cql3/query_processor.hh"
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#include "cql3/query_options.hh"
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#include "db/timeout_clock.hh"
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#include "exceptions/exceptions.hh"
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#include "timeout_config.hh"
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class database;
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namespace service {
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class storage_proxy;
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}
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namespace db {
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struct query_context {
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distributed<database>& _db;
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distributed<cql3::query_processor>& _qp;
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query_context(distributed<database>& db, distributed<cql3::query_processor>& qp) : _db(db), _qp(qp) {}
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template <typename... Args>
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future<::shared_ptr<cql3::untyped_result_set>> execute_cql(sstring req, Args&&... args) {
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return _qp.local().execute_internal(req, { data_value(std::forward<Args>(args))... });
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}
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template <typename... Args>
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future<::shared_ptr<cql3::untyped_result_set>> execute_cql_with_timeout(sstring req,
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db::timeout_clock::time_point timeout,
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Args&&... args) {
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const db::timeout_clock::time_point now = db::timeout_clock::now();
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const db::timeout_clock::duration d =
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now < timeout ?
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timeout - now :
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// let the `storage_proxy` time out the query down the call chain
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db::timeout_clock::duration::zero();
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return do_with(timeout_config{d, d, d, d, d, d, d}, [this, req = std::move(req), &args...] (auto& tcfg) {
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return _qp.local().execute_internal(req,
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cql3::query_options::DEFAULT.get_consistency(),
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tcfg,
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{ data_value(std::forward<Args>(args))... },
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true);
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});
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}
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database& db() {
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return _db.local();
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}
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service::storage_proxy& proxy() {
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return _qp.local().proxy();
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}
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cql3::query_processor& qp() {
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return _qp.local();
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}
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};
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// This does not have to be thread local, because all cores will share the same context.
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extern std::unique_ptr<query_context> qctx;
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template <typename... Args>
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static future<::shared_ptr<cql3::untyped_result_set>> execute_cql(sstring text, Args&&... args) {
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assert(qctx);
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return qctx->execute_cql(text, std::forward<Args>(args)...);
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}
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template <typename... Args>
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static future<::shared_ptr<cql3::untyped_result_set>> execute_cql_with_timeout(sstring cql,
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db::timeout_clock::time_point timeout,
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Args&&... args) {
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assert(qctx);
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return qctx->execute_cql_with_timeout(cql, timeout, std::forward<Args>(args)...);
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}
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}
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