/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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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#ifndef SRC_TRACE_PROCESSOR_STORAGE_SCHEMA_H_
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#define SRC_TRACE_PROCESSOR_STORAGE_SCHEMA_H_
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#include <algorithm>
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#include <deque>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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#include "src/trace_processor/filtered_row_index.h"
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#include "src/trace_processor/sqlite_utils.h"
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#include "src/trace_processor/storage_columns.h"
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#include "src/trace_processor/table.h"
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#include "src/trace_processor/trace_storage.h"
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namespace perfetto {
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namespace trace_processor {
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// Defines the schema for a table which is backed by concrete storage (i.e. does
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// not generate data on the fly).
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// Used by all tables which are backed by data in TraceStorage.
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class StorageSchema {
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public:
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using Columns = std::vector<std::unique_ptr<StorageColumn>>;
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// Builder class for StorageSchema.
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class Builder {
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public:
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template <class T, class... Args>
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Builder& AddColumn(std::string column_name, Args&&... args) {
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columns_.emplace_back(new T(column_name, std::forward<Args>(args)...));
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return *this;
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}
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template <class NumericType>
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Builder& AddNumericColumn(
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std::string column_name,
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const std::deque<NumericType>* vals,
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const std::deque<std::vector<uint32_t>>* index = nullptr) {
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NumericDequeAccessor<NumericType> accessor(vals, index,
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false /* has_ordering */);
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return AddGenericNumericColumn(column_name, accessor);
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}
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template <class NumericType>
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Builder& AddOrderedNumericColumn(std::string column_name,
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const std::deque<NumericType>* vals) {
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NumericDequeAccessor<NumericType> accessor(vals, nullptr,
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true /* has_ordering */);
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return AddGenericNumericColumn(column_name, accessor);
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}
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template <class Accessor>
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Builder& AddGenericNumericColumn(std::string column_name,
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Accessor accessor) {
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columns_.emplace_back(new NumericColumn<decltype(accessor)>(
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column_name, false /* hidden */, accessor));
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return *this;
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}
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template <class Id>
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Builder& AddStringColumn(std::string column_name,
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const std::deque<Id>* ids,
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const std::vector<const char*>* string_map) {
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StringVectorAccessor<Id> accessor(ids, string_map);
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columns_.emplace_back(
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new StringColumn<decltype(accessor)>(column_name, accessor));
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return *this;
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}
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Builder& AddStringColumn(std::string column_name,
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const std::deque<StringPool::Id>* ids,
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const StringPool* string_pool) {
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StringPoolAccessor accessor(ids, string_pool);
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columns_.emplace_back(
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new StringColumn<StringPoolAccessor>(column_name, accessor));
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return *this;
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}
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StorageSchema Build(std::vector<std::string> primary_keys) {
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return StorageSchema(std::move(columns_), std::move(primary_keys));
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}
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private:
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Columns columns_;
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};
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StorageSchema();
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StorageSchema(Columns columns, std::vector<std::string> primary_keys);
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Table::Schema ToTableSchema();
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size_t ColumnIndexFromName(const std::string& name) const;
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const StorageColumn& GetColumn(size_t idx) const { return *(columns_[idx]); }
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Columns* mutable_columns() { return &columns_; }
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private:
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friend class Builder;
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Columns columns_;
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std::vector<std::string> primary_keys_;
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};
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} // namespace trace_processor
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} // namespace perfetto
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#endif // SRC_TRACE_PROCESSOR_STORAGE_SCHEMA_H_
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