Function getColumnsCommitTimeForJSONTable

src/DataTypes/ObjectUtils.cpp:1011–1040

}

UInt64 getColumnsCommitTimeForJSONTable(const IStorage & table, const NamesAndTypesList & search_part_columns)
{
    Names exclude_column_names;
    for (const auto & column : table.getInMemoryMetadata().columns)
    {
        if (column.type->hasDynamicSubcolumns())
            exclude_column_names.emplace_back(column.name);
    }

    auto exclude_json_column = [&](const NamesAndTypesList & columns) -> NamesAndTypesList {
        NamesAndTypesList res;
        for (const auto & column : columns)
        {
            if (std::find(exclude_column_names.begin(), exclude_column_names.end(), column.name) == exclude_column_names.end())
                res.push_back(column);
        }
        return res;
    };

    auto search_part_columns_excluded_json = exclude_json_column(search_part_columns);

    if (search_part_columns_excluded_json == exclude_json_column(*table.part_columns))
        return table.commit_time.toUInt64();
    for (const auto & version : table.previous_versions_part_columns)
    {
        if (search_part_columns_excluded_json == exclude_json_column(*version.second))
            return version.first;
    }
    return 0;
}
}