Get the LENGTH of a LONG RAW

Question

I have a table with a column of data type LONG RAW. How do I determine the size (in bytes) of the data in this column?

If I call the LENGTH

Answer 1

As long as the data in the column does not exceed 16,383 bytes, you can solve this with a PL/SQL function, e.g.

CREATE OR REPLACE FUNCTION get_lr_length (id IN NUMBER)
  RETURN NUMBER IS
  raw_data LONG RAW;
  hex_data VARCHAR2(32767);
  len      NUMBER;
BEGIN
  SELECT my_long_raw_column INTO raw_data
  FROM my_table
  WHERE my_table.id = get_lr_length.id;
  hex_data := RAWTOHEX(raw_data);
  len := LENGTH(hex_data) / 2;
  RETURN len;
END get_lr_length;

Unfortunately, a LONG RAW can hold up to 2GB...