74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
/*
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* Copyright (C) 2019-present 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 "user_function.hh"
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#include "log.hh"
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#include "cql_serialization_format.hh"
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#include <seastar/core/thread.hh>
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namespace cql3 {
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namespace functions {
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extern logging::logger log;
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user_function::user_function(function_name name, std::vector<data_type> arg_types, std::vector<sstring> arg_names,
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sstring body, sstring language, data_type return_type, bool called_on_null_input, context ctx)
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: abstract_function(std::move(name), std::move(arg_types), std::move(return_type)),
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_arg_names(std::move(arg_names)), _body(std::move(body)), _language(std::move(language)),
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_called_on_null_input(called_on_null_input), _ctx(std::move(ctx)) {}
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bool user_function::is_pure() const { return true; }
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bool user_function::is_native() const { return false; }
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bool user_function::is_aggregate() const { return false; }
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bool user_function::requires_thread() const { return true; }
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bytes_opt user_function::execute(cql_serialization_format sf, const std::vector<bytes_opt>& parameters) {
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const auto& types = arg_types();
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if (parameters.size() != types.size()) {
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throw std::logic_error("Wrong number of parameters");
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}
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std::vector<data_value> values;
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values.reserve(parameters.size());
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for (int i = 0, n = types.size(); i != n; ++i) {
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const data_type& type = types[i];
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const bytes_opt& bytes = parameters[i];
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if (!bytes && !_called_on_null_input) {
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return std::nullopt;
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}
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values.push_back(bytes ? type->deserialize(*bytes) : data_value::make_null(type));
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}
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if (!seastar::thread::running_in_thread()) {
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on_internal_error(log, "User function cannot be executed in this context");
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}
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return seastar::visit(_ctx,
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[&] (lua_context& ctx) {
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return lua::run_script(lua::bitcode_view{ctx.bitcode}, values, return_type(), ctx.cfg).get0();
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});
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}
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}
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}
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