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57 lines
1.5 KiB
C++
57 lines
1.5 KiB
C++
#include "ProtobufColumnMatcher.h"
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#if USE_PROTOBUF
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#include <Common/Exception.h>
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#include <google/protobuf/descriptor.h>
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#include <google/protobuf/descriptor.pb.h>
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#include <Poco/String.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int NO_COMMON_COLUMNS_WITH_PROTOBUF_SCHEMA;
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}
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namespace
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{
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String columnNameToSearchableForm(const String & str)
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{
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return Poco::replace(Poco::toUpper(str), ".", "_");
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}
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}
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namespace ProtobufColumnMatcher
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{
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namespace details
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{
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ColumnNameMatcher::ColumnNameMatcher(const std::vector<String> & column_names) : column_usage(column_names.size())
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{
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column_usage.resize(column_names.size(), false);
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for (size_t i = 0; i != column_names.size(); ++i)
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column_name_to_index_map.emplace(columnNameToSearchableForm(column_names[i]), i);
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}
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size_t ColumnNameMatcher::findColumn(const String & field_name)
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{
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auto it = column_name_to_index_map.find(columnNameToSearchableForm(field_name));
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if (it == column_name_to_index_map.end())
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return -1;
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size_t column_index = it->second;
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if (column_usage[column_index])
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return -1;
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column_usage[column_index] = true;
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return column_index;
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}
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void throwNoCommonColumns()
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{
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throw Exception("No common columns with provided protobuf schema", ErrorCodes::NO_COMMON_COLUMNS_WITH_PROTOBUF_SCHEMA);
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}
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}
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}
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}
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#endif
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