message: Implemented method StringFunctionsTypeToString.
diff: @@ -20,4 +20,37 @@ void BuiltinFunctions::RegisterStringFunctions() {
  Register<ContainsFun>();
  }
  +string StringFunctionsTypeToString(StringFunctionsType type) {
  + switch (type) {
  + case StringFunctionsType::REVERSE:
  + return "REVERSE";
  + case StringFunctionsType::LOWER:
  + return "LOWER";
  + case StringFunctionsType::UPPER:
  + return "UPPER";
  + case StringFunctionsType::CONCAT:
  + return "CONCAT";
  + case StringFunctionsType::LENGTH:
  + return "LENGTH";
  + case StringFunctionsType::LIKE:
  + return "LIKE";
  + case StringFunctionsType::REGEXP:
  + return "REGEXP";
  + case StringFunctionsType::SUBSTRING:
  + return "SUBSTRING";
  + case StringFunctionsType::PRINTF:
  + return "PRINTF";
  + case StringFunctionsType::INSTR:
  + return "INSTR";
  + case StringFunctionsType::PREFIX:
  + return "PREFIX";
  + case StringFunctionsType::SUFFIX:
  + return "SUFFIX";
  + case StringFunctionsType::CONTAINS:
  + return "CONTAINS";
  + default:
  + return "INVALID";
  + }
  +}
  +
  } // namespace duckdb
  