message: Additional comments on the vectorized UDF test functions.
diff: @@ -54,6 +54,9 @@ inline string_t udf_varchar(string_t a, string_t b, string_t c) {return c;}
  // Vectorized UDF Functions -------------------------------------------------------------------
  +/*
  + * This vectorized function is a unary one that copies input values to the result vector
  + */
  template<typename TYPE>
  static void udf_unary_function(DataChunk &input, ExpressionState &state, Vector &result) {
  assert(input.column_count() == 1);
  @@ -92,6 +95,9 @@ static void udf_unary_function(DataChunk &input, ExpressionState &state, Vector
  }
  }
  +/*
  + * This vectorized function is a binary one that copies values from the second input vector to the result vector
  + */
  template<typename TYPE>
  static void udf_binary_function(DataChunk &input, ExpressionState &state, Vector &result) {
  assert(input.column_count() == 2);
  @@ -131,6 +137,9 @@ static void udf_binary_function(DataChunk &input, ExpressionState &state, Vector
  }
  }
  +/*
  + * This vectorized function is a binary one that copies values from the third input vector to the result vector
  + */
  template<typename TYPE>
  static void udf_ternary_function(DataChunk &input, ExpressionState &state, Vector &result) {
  assert(input.column_count() == 3);
  