a9ae753cd6
If a function is used by a user-defined aggregate, it must not be dropped or the aggregate would be left with a dangling function.
60 lines
2.3 KiB
C++
60 lines
2.3 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 "cql3/statements/drop_function_statement.hh"
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#include "cql3/functions/functions.hh"
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#include "cql3/functions/user_function.hh"
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#include "prepared_statement.hh"
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#include "service/migration_manager.hh"
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#include "cql3/query_processor.hh"
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namespace cql3 {
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namespace statements {
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std::unique_ptr<prepared_statement> drop_function_statement::prepare(database& db, cql_stats& stats) {
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return std::make_unique<prepared_statement>(make_shared<drop_function_statement>(*this));
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}
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future<shared_ptr<cql_transport::event::schema_change>> drop_function_statement::announce_migration(
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query_processor& qp) const {
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if (!_func) {
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return make_ready_future<shared_ptr<cql_transport::event::schema_change>>();
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}
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auto user_func = dynamic_pointer_cast<functions::user_function>(_func);
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if (!user_func) {
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throw exceptions::invalid_request_exception(format("'{}' is not a user defined function", _func));
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}
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if (auto aggregate = functions::functions::used_by_user_aggregate(user_func->name()); bool(aggregate)) {
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throw exceptions::invalid_request_exception(format("Cannot delete function {}, as it is used by user-defined aggregate {}", _func, *aggregate));
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}
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return qp.get_migration_manager().announce_function_drop(user_func).then([this] {
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return create_schema_change(*_func, false);
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});
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}
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drop_function_statement::drop_function_statement(functions::function_name name,
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std::vector<shared_ptr<cql3_type::raw>> arg_types, bool args_present, bool if_exists)
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: drop_function_statement_base(std::move(name), std::move(arg_types), args_present, if_exists) {}
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}
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}
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