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https://github.com/scylladb/scylladb.git
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2c3591cbd9
We use boost::any to convert to and from database values (stored in serlialized form) and native C++ values. boost::any captures information about the data type (how to copy/move/delete etc.) and stores it inside the boost::any instance. We later retrieve the real value using boost::any_cast. However, data_value (which has a boost::any member) already has type information as a data_type instance. By teaching data_type intances about the corresponding native type, we can elimiante the use of boost::any. While boost::any is evil and eliminating it improves efficiency somewhat, the real goal is growing native type support in data_type. We will use that later to store native types in the cache, enabling O(log n) access to collections, O(1) access to tuples, and more efficient large blob support.
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
/*
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* Copyright 2015 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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#pragma once
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#include <map>
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#include "query-result-set.hh"
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//
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// Contains assertions for query::result_set objects
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//
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// Example use:
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//
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// assert_that(rs)
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// .has(a_row().with_column("column_name", "value"));
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//
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class row_assertion {
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std::map<bytes, data_value> _expected_values;
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public:
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row_assertion& with_column(bytes name, data_value value) {
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_expected_values.emplace(name, value);
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return *this;
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}
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private:
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friend class result_set_assertions;
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bool matches(const query::result_set_row& row) const;
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sstring describe(schema_ptr s) const;
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};
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inline
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row_assertion a_row() {
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return {};
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}
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class result_set_assertions {
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const query::result_set& _rs;
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public:
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result_set_assertions(const query::result_set& rs) : _rs(rs) { }
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const result_set_assertions& has(const row_assertion& ra) const;
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const result_set_assertions& has_only(const row_assertion& ra) const;
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const result_set_assertions& is_empty() const;
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const result_set_assertions& has_size(int row_count) const;
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};
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// Make rs live as long as the returned assertion object is used
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inline
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result_set_assertions assert_that(const query::result_set& rs) {
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return { rs };
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}
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