63006e5dd2
We want the format of query results to be eventually defined in the IDL and be independent of the format we use in memory to represent collections. This change is a step in this direction. The change decouples format of collection cells in query results from our in-memory representation. We currently use collection_mutation_view, after the change we will use CQL binary protocol format. We use that because it requires less transformations on the coordinator side. One complication is that some list operations need to retrieve keys used in list cells, not only values. To satisfy this need, new query option was added called "collections_as_maps" which will cause lists and sets to be reinterpreted as maps matching their underlying representation. This allows the coordinator to generate mutations referencing existing items in lists.
75 lines
2.3 KiB
C++
75 lines
2.3 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 2015 Cloudius Systems
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*
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* Modified by Cloudius Systems
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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/update_parameters.hh"
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namespace cql3 {
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const update_parameters::prefetch_data::cell_list*
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update_parameters::get_prefetched_list(
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partition_key pkey,
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std::experimental::optional<clustering_key> ckey,
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const column_definition& column) const
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{
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if (!_prefetched) {
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return {};
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}
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auto i = _prefetched->rows.find(std::make_pair(std::move(pkey), std::move(ckey)));
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if (i == _prefetched->rows.end()) {
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return {};
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}
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auto&& row = i->second;
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auto j = row.find(column.id);
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if (j == row.end()) {
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return {};
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}
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return &j->second;
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}
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update_parameters::prefetch_data::prefetch_data(schema_ptr schema)
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: rows(8, key_hashing(*schema), key_equality(*schema))
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, schema(schema)
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{ }
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}
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