text: SELECT DEGREES(PI()) from db_root;
  
  SELECT DEGREES(PI() / 2) from db_root;
  
  SELECT DEGREES(12) from db_root;
  
  SELECT DEGREES('12') from db_root;
  
  SELECT DEGREES('a') from db_root;
  
  SELECT DEGREES(NULL) from db_root;
  
  select degrees(123456789012345.12345) from db_root;
  