mirror of
https://gitee.com/milvus-io/milvus.git
synced 2025-12-31 07:55:38 +08:00
629 lines
25 KiB
C++
629 lines
25 KiB
C++
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "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 distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License
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#include "PlanProto.h"
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#include <google/protobuf/text_format.h>
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#include <cstdint>
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#include <string>
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#include "ExprImpl.h"
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#include "common/VectorTrait.h"
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#include "exceptions/EasyAssert.h"
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#include "generated/ExtractInfoExprVisitor.h"
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#include "generated/ExtractInfoPlanNodeVisitor.h"
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#include "pb/plan.pb.h"
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namespace milvus::query {
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namespace planpb = milvus::proto::plan;
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template <typename T>
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std::unique_ptr<TermExprImpl<T>>
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ExtractTermExprImpl(FieldId field_id,
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DataType data_type,
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const planpb::TermExpr& expr_proto) {
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static_assert(IsScalar<T>);
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auto size = expr_proto.values_size();
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std::vector<T> terms(size);
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auto val_case = proto::plan::GenericValue::ValCase::VAL_NOT_SET;
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for (int i = 0; i < size; ++i) {
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auto& value_proto = expr_proto.values(i);
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if constexpr (std::is_same_v<T, bool>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kBoolVal);
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terms[i] = static_cast<T>(value_proto.bool_val());
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val_case = proto::plan::GenericValue::ValCase::kBoolVal;
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} else if constexpr (std::is_integral_v<T>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kInt64Val);
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terms[i] = static_cast<T>(value_proto.int64_val());
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val_case = proto::plan::GenericValue::ValCase::kInt64Val;
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} else if constexpr (std::is_floating_point_v<T>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kFloatVal);
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terms[i] = static_cast<T>(value_proto.float_val());
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val_case = proto::plan::GenericValue::ValCase::kFloatVal;
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} else if constexpr (std::is_same_v<T, std::string>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kStringVal);
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terms[i] = static_cast<T>(value_proto.string_val());
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val_case = proto::plan::GenericValue::ValCase::kStringVal;
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} else {
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static_assert(always_false<T>);
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}
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}
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std::sort(terms.begin(), terms.end());
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return std::make_unique<TermExprImpl<T>>(
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expr_proto.column_info(), terms, val_case);
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}
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template <typename T>
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std::unique_ptr<UnaryRangeExprImpl<T>>
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ExtractUnaryRangeExprImpl(FieldId field_id,
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DataType data_type,
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const planpb::UnaryRangeExpr& expr_proto) {
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static_assert(IsScalar<T>);
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auto getValue = [&](const auto& value_proto) -> T {
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if constexpr (std::is_same_v<T, bool>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kBoolVal);
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return static_cast<T>(value_proto.bool_val());
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} else if constexpr (std::is_integral_v<T>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kInt64Val);
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return static_cast<T>(value_proto.int64_val());
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} else if constexpr (std::is_floating_point_v<T>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kFloatVal);
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return static_cast<T>(value_proto.float_val());
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} else if constexpr (std::is_same_v<T, std::string>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kStringVal);
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return static_cast<T>(value_proto.string_val());
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} else {
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static_assert(always_false<T>);
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}
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};
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return std::make_unique<UnaryRangeExprImpl<T>>(
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expr_proto.column_info(),
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static_cast<OpType>(expr_proto.op()),
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getValue(expr_proto.value()),
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expr_proto.value().val_case());
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}
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template <typename T>
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std::unique_ptr<BinaryRangeExprImpl<T>>
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ExtractBinaryRangeExprImpl(FieldId field_id,
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DataType data_type,
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const planpb::BinaryRangeExpr& expr_proto) {
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static_assert(IsScalar<T>);
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auto getValue = [&](const auto& value_proto) -> T {
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if constexpr (std::is_same_v<T, bool>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kBoolVal);
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return static_cast<T>(value_proto.bool_val());
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} else if constexpr (std::is_integral_v<T>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kInt64Val);
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return static_cast<T>(value_proto.int64_val());
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} else if constexpr (std::is_floating_point_v<T>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kFloatVal);
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return static_cast<T>(value_proto.float_val());
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} else if constexpr (std::is_same_v<T, std::string>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kStringVal);
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return static_cast<T>(value_proto.string_val());
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} else {
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static_assert(always_false<T>);
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}
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};
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return std::make_unique<BinaryRangeExprImpl<T>>(
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expr_proto.column_info(),
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expr_proto.lower_value().val_case(),
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expr_proto.lower_inclusive(),
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expr_proto.upper_inclusive(),
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getValue(expr_proto.lower_value()),
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getValue(expr_proto.upper_value()));
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}
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template <typename T>
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std::unique_ptr<BinaryArithOpEvalRangeExprImpl<T>>
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ExtractBinaryArithOpEvalRangeExprImpl(
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FieldId field_id,
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DataType data_type,
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const planpb::BinaryArithOpEvalRangeExpr& expr_proto) {
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static_assert(std::is_fundamental_v<T>);
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auto getValue = [&](const auto& value_proto) -> T {
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if constexpr (std::is_same_v<T, bool>) {
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// Handle bool here. Otherwise, it can go in `is_integral_v<T>`
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static_assert(always_false<T>);
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} else if constexpr (std::is_integral_v<T>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kInt64Val);
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return static_cast<T>(value_proto.int64_val());
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} else if constexpr (std::is_floating_point_v<T>) {
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Assert(value_proto.val_case() == planpb::GenericValue::kFloatVal);
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return static_cast<T>(value_proto.float_val());
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} else {
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static_assert(always_false<T>);
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}
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};
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return std::make_unique<BinaryArithOpEvalRangeExprImpl<T>>(
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expr_proto.column_info(),
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expr_proto.value().val_case(),
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expr_proto.arith_op(),
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getValue(expr_proto.right_operand()),
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expr_proto.op(),
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getValue(expr_proto.value()));
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}
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std::unique_ptr<VectorPlanNode>
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ProtoParser::PlanNodeFromProto(const planpb::PlanNode& plan_node_proto) {
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// TODO: add more buffs
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Assert(plan_node_proto.has_vector_anns());
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auto& anns_proto = plan_node_proto.vector_anns();
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auto expr_opt = [&]() -> std::optional<ExprPtr> {
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if (!anns_proto.has_predicates()) {
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return std::nullopt;
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} else {
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return ParseExpr(anns_proto.predicates());
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}
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}();
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auto& query_info_proto = anns_proto.query_info();
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SearchInfo search_info;
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auto field_id = FieldId(anns_proto.field_id());
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search_info.field_id_ = field_id;
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search_info.metric_type_ = query_info_proto.metric_type();
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search_info.topk_ = query_info_proto.topk();
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search_info.round_decimal_ = query_info_proto.round_decimal();
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search_info.search_params_ = json::parse(query_info_proto.search_params());
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auto plan_node = [&]() -> std::unique_ptr<VectorPlanNode> {
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if (anns_proto.is_binary()) {
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return std::make_unique<BinaryVectorANNS>();
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} else {
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return std::make_unique<FloatVectorANNS>();
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}
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}();
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plan_node->placeholder_tag_ = anns_proto.placeholder_tag();
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plan_node->predicate_ = std::move(expr_opt);
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plan_node->search_info_ = std::move(search_info);
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return plan_node;
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}
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std::unique_ptr<RetrievePlanNode>
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ProtoParser::RetrievePlanNodeFromProto(
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const planpb::PlanNode& plan_node_proto) {
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Assert(plan_node_proto.has_predicates() || plan_node_proto.has_query());
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auto plan_node = [&]() -> std::unique_ptr<RetrievePlanNode> {
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auto node = std::make_unique<RetrievePlanNode>();
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if (plan_node_proto.has_predicates()) { // version before 2023.03.30.
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node->is_count = false;
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auto& predicate_proto = plan_node_proto.predicates();
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auto expr_opt = [&]() -> ExprPtr {
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return ParseExpr(predicate_proto);
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}();
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node->predicate_ = std::move(expr_opt);
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} else {
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auto& query = plan_node_proto.query();
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if (query.has_predicates()) {
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auto& predicate_proto = query.predicates();
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auto expr_opt = [&]() -> ExprPtr {
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return ParseExpr(predicate_proto);
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}();
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node->predicate_ = std::move(expr_opt);
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}
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node->is_count = query.is_count();
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}
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return node;
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}();
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return plan_node;
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}
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std::unique_ptr<Plan>
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ProtoParser::CreatePlan(const proto::plan::PlanNode& plan_node_proto) {
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auto plan = std::make_unique<Plan>(schema);
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auto plan_node = PlanNodeFromProto(plan_node_proto);
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ExtractedPlanInfo plan_info(schema.size());
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ExtractInfoPlanNodeVisitor extractor(plan_info);
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plan_node->accept(extractor);
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plan->tag2field_["$0"] = plan_node->search_info_.field_id_;
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plan->plan_node_ = std::move(plan_node);
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plan->extra_info_opt_ = std::move(plan_info);
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for (auto field_id_raw : plan_node_proto.output_field_ids()) {
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auto field_id = FieldId(field_id_raw);
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plan->target_entries_.push_back(field_id);
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}
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return plan;
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}
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std::unique_ptr<RetrievePlan>
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ProtoParser::CreateRetrievePlan(const proto::plan::PlanNode& plan_node_proto) {
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auto retrieve_plan = std::make_unique<RetrievePlan>(schema);
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auto plan_node = RetrievePlanNodeFromProto(plan_node_proto);
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ExtractedPlanInfo plan_info(schema.size());
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ExtractInfoPlanNodeVisitor extractor(plan_info);
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plan_node->accept(extractor);
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retrieve_plan->plan_node_ = std::move(plan_node);
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for (auto field_id_raw : plan_node_proto.output_field_ids()) {
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auto field_id = FieldId(field_id_raw);
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retrieve_plan->field_ids_.push_back(field_id);
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}
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return retrieve_plan;
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}
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ExprPtr
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ProtoParser::ParseUnaryRangeExpr(const proto::plan::UnaryRangeExpr& expr_pb) {
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auto& column_info = expr_pb.column_info();
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auto field_id = FieldId(column_info.field_id());
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auto data_type = schema[field_id].get_data_type();
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Assert(data_type == static_cast<DataType>(column_info.data_type()));
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auto result = [&]() -> ExprPtr {
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switch (data_type) {
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case DataType::BOOL: {
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return ExtractUnaryRangeExprImpl<bool>(
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field_id, data_type, expr_pb);
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}
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case DataType::INT8: {
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return ExtractUnaryRangeExprImpl<int8_t>(
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field_id, data_type, expr_pb);
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}
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case DataType::INT16: {
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return ExtractUnaryRangeExprImpl<int16_t>(
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field_id, data_type, expr_pb);
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}
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case DataType::INT32: {
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return ExtractUnaryRangeExprImpl<int32_t>(
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field_id, data_type, expr_pb);
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}
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case DataType::INT64: {
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return ExtractUnaryRangeExprImpl<int64_t>(
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field_id, data_type, expr_pb);
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}
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case DataType::FLOAT: {
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return ExtractUnaryRangeExprImpl<float>(
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field_id, data_type, expr_pb);
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}
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case DataType::DOUBLE: {
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return ExtractUnaryRangeExprImpl<double>(
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field_id, data_type, expr_pb);
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}
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case DataType::VARCHAR: {
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return ExtractUnaryRangeExprImpl<std::string>(
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field_id, data_type, expr_pb);
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}
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case DataType::JSON: {
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switch (expr_pb.value().val_case()) {
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case proto::plan::GenericValue::ValCase::kBoolVal:
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return ExtractUnaryRangeExprImpl<bool>(
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field_id, data_type, expr_pb);
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case proto::plan::GenericValue::ValCase::kFloatVal:
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return ExtractUnaryRangeExprImpl<double>(
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field_id, data_type, expr_pb);
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case proto::plan::GenericValue::ValCase::kInt64Val:
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return ExtractUnaryRangeExprImpl<int64_t>(
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field_id, data_type, expr_pb);
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case proto::plan::GenericValue::ValCase::kStringVal:
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return ExtractUnaryRangeExprImpl<std::string>(
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field_id, data_type, expr_pb);
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default:
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PanicInfo(
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fmt::format("unknown data type: {} in expression",
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expr_pb.value().val_case()));
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}
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}
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default: {
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PanicInfo("unsupported data type");
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}
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}
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}();
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return result;
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}
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ExprPtr
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ProtoParser::ParseBinaryRangeExpr(const proto::plan::BinaryRangeExpr& expr_pb) {
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auto& columnInfo = expr_pb.column_info();
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auto field_id = FieldId(columnInfo.field_id());
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auto data_type = schema[field_id].get_data_type();
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Assert(data_type == (DataType)columnInfo.data_type());
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auto result = [&]() -> ExprPtr {
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switch (data_type) {
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case DataType::BOOL: {
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return ExtractBinaryRangeExprImpl<bool>(
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field_id, data_type, expr_pb);
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}
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case DataType::INT8: {
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return ExtractBinaryRangeExprImpl<int8_t>(
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field_id, data_type, expr_pb);
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}
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case DataType::INT16: {
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return ExtractBinaryRangeExprImpl<int16_t>(
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field_id, data_type, expr_pb);
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}
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case DataType::INT32: {
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return ExtractBinaryRangeExprImpl<int32_t>(
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field_id, data_type, expr_pb);
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}
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case DataType::INT64: {
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return ExtractBinaryRangeExprImpl<int64_t>(
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field_id, data_type, expr_pb);
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}
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case DataType::FLOAT: {
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return ExtractBinaryRangeExprImpl<float>(
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field_id, data_type, expr_pb);
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}
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case DataType::DOUBLE: {
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return ExtractBinaryRangeExprImpl<double>(
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field_id, data_type, expr_pb);
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}
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case DataType::VARCHAR: {
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return ExtractBinaryRangeExprImpl<std::string>(
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field_id, data_type, expr_pb);
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}
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case DataType::JSON: {
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switch (expr_pb.lower_value().val_case()) {
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case proto::plan::GenericValue::ValCase::kBoolVal:
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return ExtractBinaryRangeExprImpl<bool>(
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field_id, data_type, expr_pb);
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case proto::plan::GenericValue::ValCase::kInt64Val:
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return ExtractBinaryRangeExprImpl<int64_t>(
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field_id, data_type, expr_pb);
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case proto::plan::GenericValue::ValCase::kFloatVal:
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return ExtractBinaryRangeExprImpl<double>(
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field_id, data_type, expr_pb);
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case proto::plan::GenericValue::ValCase::kStringVal:
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return ExtractBinaryRangeExprImpl<std::string>(
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field_id, data_type, expr_pb);
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default:
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PanicInfo("unknown data type in expression");
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}
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}
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default: {
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PanicInfo("unsupported data type");
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}
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}
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}();
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return result;
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}
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ExprPtr
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ProtoParser::ParseCompareExpr(const proto::plan::CompareExpr& expr_pb) {
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auto& left_column_info = expr_pb.left_column_info();
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auto left_field_id = FieldId(left_column_info.field_id());
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auto left_data_type = schema[left_field_id].get_data_type();
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Assert(left_data_type ==
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static_cast<DataType>(left_column_info.data_type()));
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auto& right_column_info = expr_pb.right_column_info();
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auto right_field_id = FieldId(right_column_info.field_id());
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auto right_data_type = schema[right_field_id].get_data_type();
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Assert(right_data_type ==
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static_cast<DataType>(right_column_info.data_type()));
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return [&]() -> ExprPtr {
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auto result = std::make_unique<CompareExpr>();
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result->left_field_id_ = left_field_id;
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result->left_data_type_ = left_data_type;
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result->right_field_id_ = right_field_id;
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result->right_data_type_ = right_data_type;
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result->op_type_ = static_cast<OpType>(expr_pb.op());
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return result;
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}();
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}
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ExprPtr
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ProtoParser::ParseTermExpr(const proto::plan::TermExpr& expr_pb) {
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auto& columnInfo = expr_pb.column_info();
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auto field_id = FieldId(columnInfo.field_id());
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auto data_type = schema[field_id].get_data_type();
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Assert(data_type == (DataType)columnInfo.data_type());
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// auto& field_meta = schema[field_offset];
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auto result = [&]() -> ExprPtr {
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switch (data_type) {
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case DataType::BOOL: {
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return ExtractTermExprImpl<bool>(field_id, data_type, expr_pb);
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}
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case DataType::INT8: {
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return ExtractTermExprImpl<int8_t>(
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field_id, data_type, expr_pb);
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}
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case DataType::INT16: {
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return ExtractTermExprImpl<int16_t>(
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field_id, data_type, expr_pb);
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}
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case DataType::INT32: {
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return ExtractTermExprImpl<int32_t>(
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field_id, data_type, expr_pb);
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}
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case DataType::INT64: {
|
|
return ExtractTermExprImpl<int64_t>(
|
|
field_id, data_type, expr_pb);
|
|
}
|
|
case DataType::FLOAT: {
|
|
return ExtractTermExprImpl<float>(field_id, data_type, expr_pb);
|
|
}
|
|
case DataType::DOUBLE: {
|
|
return ExtractTermExprImpl<double>(
|
|
field_id, data_type, expr_pb);
|
|
}
|
|
case DataType::VARCHAR: {
|
|
return ExtractTermExprImpl<std::string>(
|
|
field_id, data_type, expr_pb);
|
|
}
|
|
case DataType::JSON: {
|
|
if (expr_pb.values().size() == 0) {
|
|
return ExtractTermExprImpl<bool>(
|
|
field_id, data_type, expr_pb);
|
|
}
|
|
switch (expr_pb.values()[0].val_case()) {
|
|
case proto::plan::GenericValue::ValCase::kBoolVal:
|
|
return ExtractTermExprImpl<bool>(
|
|
field_id, data_type, expr_pb);
|
|
case proto::plan::GenericValue::ValCase::kFloatVal:
|
|
return ExtractTermExprImpl<double>(
|
|
field_id, data_type, expr_pb);
|
|
case proto::plan::GenericValue::ValCase::kInt64Val:
|
|
return ExtractTermExprImpl<int64_t>(
|
|
field_id, data_type, expr_pb);
|
|
case proto::plan::GenericValue::ValCase::kStringVal:
|
|
return ExtractTermExprImpl<std::string>(
|
|
field_id, data_type, expr_pb);
|
|
default:
|
|
PanicInfo(
|
|
fmt::format("unknown data type: {} in expression",
|
|
expr_pb.values()[0].val_case()));
|
|
}
|
|
}
|
|
default: {
|
|
PanicInfo("unsupported data type");
|
|
}
|
|
}
|
|
}();
|
|
return result;
|
|
}
|
|
|
|
ExprPtr
|
|
ProtoParser::ParseUnaryExpr(const proto::plan::UnaryExpr& expr_pb) {
|
|
auto op = static_cast<LogicalUnaryExpr::OpType>(expr_pb.op());
|
|
Assert(op == LogicalUnaryExpr::OpType::LogicalNot);
|
|
auto expr = this->ParseExpr(expr_pb.child());
|
|
return std::make_unique<LogicalUnaryExpr>(op, expr);
|
|
}
|
|
|
|
ExprPtr
|
|
ProtoParser::ParseBinaryExpr(const proto::plan::BinaryExpr& expr_pb) {
|
|
auto op = static_cast<LogicalBinaryExpr::OpType>(expr_pb.op());
|
|
auto left_expr = this->ParseExpr(expr_pb.left());
|
|
auto right_expr = this->ParseExpr(expr_pb.right());
|
|
return std::make_unique<LogicalBinaryExpr>(op, left_expr, right_expr);
|
|
}
|
|
|
|
ExprPtr
|
|
ProtoParser::ParseBinaryArithOpEvalRangeExpr(
|
|
const proto::plan::BinaryArithOpEvalRangeExpr& expr_pb) {
|
|
auto& column_info = expr_pb.column_info();
|
|
auto field_id = FieldId(column_info.field_id());
|
|
auto data_type = schema[field_id].get_data_type();
|
|
Assert(data_type == static_cast<DataType>(column_info.data_type()));
|
|
|
|
auto result = [&]() -> ExprPtr {
|
|
switch (data_type) {
|
|
case DataType::INT8: {
|
|
return ExtractBinaryArithOpEvalRangeExprImpl<int8_t>(
|
|
field_id, data_type, expr_pb);
|
|
}
|
|
case DataType::INT16: {
|
|
return ExtractBinaryArithOpEvalRangeExprImpl<int16_t>(
|
|
field_id, data_type, expr_pb);
|
|
}
|
|
case DataType::INT32: {
|
|
return ExtractBinaryArithOpEvalRangeExprImpl<int32_t>(
|
|
field_id, data_type, expr_pb);
|
|
}
|
|
case DataType::INT64: {
|
|
return ExtractBinaryArithOpEvalRangeExprImpl<int64_t>(
|
|
field_id, data_type, expr_pb);
|
|
}
|
|
case DataType::FLOAT: {
|
|
return ExtractBinaryArithOpEvalRangeExprImpl<float>(
|
|
field_id, data_type, expr_pb);
|
|
}
|
|
case DataType::DOUBLE: {
|
|
return ExtractBinaryArithOpEvalRangeExprImpl<double>(
|
|
field_id, data_type, expr_pb);
|
|
}
|
|
case DataType::JSON: {
|
|
switch (expr_pb.value().val_case()) {
|
|
case proto::plan::GenericValue::ValCase::kInt64Val:
|
|
return ExtractBinaryArithOpEvalRangeExprImpl<int64_t>(
|
|
field_id, data_type, expr_pb);
|
|
case proto::plan::GenericValue::ValCase::kFloatVal:
|
|
return ExtractBinaryArithOpEvalRangeExprImpl<double>(
|
|
field_id, data_type, expr_pb);
|
|
default:
|
|
PanicInfo(fmt::format(
|
|
"unsupported data type {} in expression",
|
|
expr_pb.value().val_case()));
|
|
}
|
|
}
|
|
default: {
|
|
PanicInfo("unsupported data type");
|
|
}
|
|
}
|
|
}();
|
|
return result;
|
|
}
|
|
|
|
std::unique_ptr<ExistsExprImpl>
|
|
ExtractExistsExprImpl(const proto::plan::ExistsExpr& expr_proto) {
|
|
return std::make_unique<ExistsExprImpl>(expr_proto.info());
|
|
}
|
|
|
|
ExprPtr
|
|
ProtoParser::ParseExistExpr(const proto::plan::ExistsExpr& expr_pb) {
|
|
auto& column_info = expr_pb.info();
|
|
auto field_id = FieldId(column_info.field_id());
|
|
auto data_type = schema[field_id].get_data_type();
|
|
Assert(data_type == static_cast<DataType>(column_info.data_type()));
|
|
|
|
auto result = [&]() -> ExprPtr {
|
|
switch (data_type) {
|
|
case DataType::JSON: {
|
|
return ExtractExistsExprImpl(expr_pb);
|
|
}
|
|
default: {
|
|
PanicInfo("unsupported data type");
|
|
}
|
|
}
|
|
}();
|
|
return result;
|
|
}
|
|
|
|
ExprPtr
|
|
ProtoParser::ParseExpr(const proto::plan::Expr& expr_pb) {
|
|
using ppe = proto::plan::Expr;
|
|
switch (expr_pb.expr_case()) {
|
|
case ppe::kBinaryExpr: {
|
|
return ParseBinaryExpr(expr_pb.binary_expr());
|
|
}
|
|
case ppe::kUnaryExpr: {
|
|
return ParseUnaryExpr(expr_pb.unary_expr());
|
|
}
|
|
case ppe::kTermExpr: {
|
|
return ParseTermExpr(expr_pb.term_expr());
|
|
}
|
|
case ppe::kUnaryRangeExpr: {
|
|
return ParseUnaryRangeExpr(expr_pb.unary_range_expr());
|
|
}
|
|
case ppe::kBinaryRangeExpr: {
|
|
return ParseBinaryRangeExpr(expr_pb.binary_range_expr());
|
|
}
|
|
case ppe::kCompareExpr: {
|
|
return ParseCompareExpr(expr_pb.compare_expr());
|
|
}
|
|
case ppe::kBinaryArithOpEvalRangeExpr: {
|
|
return ParseBinaryArithOpEvalRangeExpr(
|
|
expr_pb.binary_arith_op_eval_range_expr());
|
|
}
|
|
case ppe::kExistsExpr: {
|
|
return ParseExistExpr(expr_pb.exists_expr());
|
|
}
|
|
default:
|
|
PanicInfo("unsupported expr proto node");
|
|
}
|
|
}
|
|
|
|
} // namespace milvus::query
|