eec441d365
This is useful for implementing operator==() for expressions, which in turn require comparing constants, which contain raw_values. Note that this is not CQL comparison (that would be implemented in cql3::expr::evaluate() and would return a CQL boolean, not a C++ boolean, but a traditional C++ value comparison.
82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
/*
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* Copyright (C) 2020-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#include "cql3/values.hh"
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namespace cql3 {
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std::ostream& operator<<(std::ostream& os, const raw_value_view& value) {
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seastar::visit(value._data, [&] (FragmentedView auto v) {
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os << "{ value: ";
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for (bytes_view frag : fragment_range(v)) {
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os << frag;
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}
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os << " }";
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}, [&] (null_value) {
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os << "{ null }";
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}, [&] (unset_value) {
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os << "{ unset }";
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});
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return os;
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}
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raw_value_view raw_value::view() const {
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switch (_data.index()) {
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case 0: return raw_value_view::make_value(managed_bytes_view(bytes_view(std::get<bytes>(_data))));
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case 1: return raw_value_view::make_value(managed_bytes_view(std::get<managed_bytes>(_data)));
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case 2: return raw_value_view::make_null();
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default: return raw_value_view::make_unset_value();
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}
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}
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raw_value raw_value::make_value(const raw_value_view& view) {
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switch (view._data.index()) {
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case 0: return raw_value::make_value(managed_bytes(std::get<fragmented_temporary_buffer::view>(view._data)));
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case 1: return raw_value::make_value(managed_bytes(std::get<managed_bytes_view>(view._data)));
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case 2: return raw_value::make_null();
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default: return raw_value::make_unset_value();
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}
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}
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raw_value_view raw_value_view::make_temporary(raw_value&& value) {
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switch (value._data.index()) {
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case 0: return raw_value_view(managed_bytes(std::get<bytes>(value._data)));
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case 1: return raw_value_view(std::move(std::get<managed_bytes>(value._data)));
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case 2: return raw_value_view::make_null();
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case 3: return raw_value_view::make_unset_value();
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default: throw std::runtime_error(fmt::format("raw_value_view::make_temporary bad index: {}", value._data.index()));
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}
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}
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raw_value_view::raw_value_view(managed_bytes&& tmp) {
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_temporary_storage = make_lw_shared<managed_bytes>(std::move(tmp));
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_data = managed_bytes_view(*_temporary_storage);
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}
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bool operator==(const raw_value& v1, const raw_value& v2) {
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if (v1.is_unset_value() && v2.is_unset_value()) {
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return true;
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}
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if (v1.is_null() && v2.is_null()) {
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return true; // note: this is not CQL comparison which would return NULL here
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}
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if (v1.is_value() && v2.is_value()) {
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return v1.view().with_value([&] (const FragmentedView auto& v1v) {
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return v2.view().with_value([&] (const FragmentedView auto& v2v) {
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return compare_unsigned(v1v, v2v) == 0;
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});
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});
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}
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return false;
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}
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}
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