How to loop through a delimited list in Oracle PLSQL

Question

I am working on an Oracle procedure that calls another procedure within it. One of my parameters (parm1) can contain one or more values in a comma separated lis

Answer 1

It is possible to use a function that you can use in a for loop (without regexp for ThinkJet):

Create a type and function

CREATE OR REPLACE TYPE t_my_list AS TABLE OF VARCHAR2(100);
CREATE OR REPLACE
       FUNCTION cto_table(p_sep in Varchar2, p_list IN VARCHAR2)
         RETURN t_my_list
       AS
         l_string VARCHAR2(32767) := p_list || p_sep;
         l_sep_index PLS_INTEGER;
         l_index PLS_INTEGER := 1;
         l_tab t_my_list     := t_my_list();
       BEGIN
         LOOP
           l_sep_index := INSTR(l_string, p_sep, l_index);
           EXIT
         WHEN l_sep_index = 0;
           l_tab.EXTEND;
           l_tab(l_tab.COUNT) := TRIM(SUBSTR(l_string,l_index,l_sep_index - l_index));
           l_index            := l_sep_index + 1;
         END LOOP;
         RETURN l_tab;
       END cto_table;
/

Then how to call it in the for loop:

DECLARE
  parm1 varchar2(4000) := '123,234,345,456,567,789,890';
BEGIN
    FOR x IN (select * from (table(cto_table(',', parm1)) ) )
    LOOP
        dbms_output.put_line('callProdcedure2 called with ' || x.COLUMN_VALUE);
        callProdcedure2(x.COLUMN_VALUE);
    END LOOP;
END;
/

Notice the default name COLUMN_VALUE given by Oracle, which is necessary for the use I want to make of the result.

Result as expected:

callProdcedure2 called with 123
callProdcedure2 called with 234
...