SQLs

// template <typename T>
// std::string  PrepareInsertToWordTable(const T &tablename)
// {
//     std::ostringstream oss;
//     oss << "INSERT INTO " << tablename << " (word) " <<
//      "(SELECT $1 WHERE NOT EXISTS ( SELECT 1 FROM " << tablename
//       << " WHERE word = $1 ) ON CONFLICT DO NOTHING;";
//       return oss.str();
// };

// /**
// *  @brief Get request to get all words in needed category
// */
// template <typename T>
// std::string PrepareSelectWordsFromTranslateByCategory(const T &value)
// {
//     std::ostringstream oss;
//     oss << "SELECT * FROM " << value << " WHERE category_id = ($1);";
//     return oss.str();
// };