Search for multiple values separated by carriage return and not commas

Question

I have developed a report in BI Publisher that allows a user to enter multiple values that are separated by commas.
Is there any way of entering multiple values that are separated by carriage return and not commas?
Any help would be appreciated.
Thanks

Answer 1

Here below, without function :
SQL> with tbl as
  2  (select 0 c1, 'j' c2 from dual union all
  3   select 1 c1, 'k' c2 from dual union all
  4   select 2 c1, 'l' c2 from dual union all
  5   select 3 c1, 'm' c2 from dual union all
  6   select 4 c1, 'n' c2 from dual )
  7  select *
  8  from   tbl
  9  where   c1 in (select substr(mystring,instr(mystring,',',1,rownum)+1,instr(mystring,',',1,rownum+1)-instr(mystring,',',1,rownum)-1)
10                 from   (select ','||'&str'||',' mystring from dual)
11                 connect by  level <= length(mystring)-length(replace(mystring,','))-1);
Enter value for str: 1,2,3
old  10:                from   (select ','||'&str'||',' mystring from dual)
new  10:                from   (select ','||'1,2,3'||',' mystring from dual)
        C1 C
         1 k
         2 l
         3 m
SQL> /
Enter value for str: 0
old  10:                from   (select ','||'&str'||',' mystring from dual)
new  10:                from   (select ','||'0'||',' mystring from dual)
        C1 C
         0 j
SQL> Nicolas.