followup

-1

drop table if exists t1,t2;

create  table t1 (id int(10) not null unique);

create  table t2 (id int(10) not null primary key,

val int(10) not null);

create  table t2 (id int(10) not null primary key, val int(10) not null);

insert into t1 values (1),(2),(4);

insert into t2 values (1,1),(2,1),(3,1),(4,2);

select one.id, elt(two.val,'one','two') from t1 one, t2 two where two.id=one.id;

char *Field_string::pack_key(char *to, const char *from, uint max_length)

{

  const char *end=from+min(field_length,max_length);

  int length;

  while (end > from && end[-1] == ' ')

    end--;

  length= end-from;

  int length=min(field_length,max_length);

  uint char_length= (field_charset->mbmaxlen > 1) ?

              max_length/field_charset->mbmaxlen : max_length;

  if (length > char_length)

    char_length= my_charpos(field_charset, from, end, char_length);

    char_length= my_charpos(field_charset, from, from+length, char_length);

  set_if_smaller(length, char_length);

  while (length && from[length-1] == ' ')

    length--;

  *to= (uchar)length;

  memcpy(to+1, from, length);

  return to+1+length;