APEX Shuttle - get more values as selected - sql

Question

i working since some days with APEX and i added a Shuttle also a text field which contains after processing the selected values.
for the shuttle i have made a LOV (contains stations)
example:
Be
Fd
Au
...
the target is get all object's which contains the selected station's
but if i run the select i get more objects - also the object which does not contain any selected station, but i don’t know why
in the SQL statement i have the following: (ds_bess001 is the field for stations)
AND INSTR (:P4_BES_EN, zl.ds_bes001) > 0
for the shuttle i use PL/SQL below
DECLARE
v_selected APEX_APPLICATION_GLOBAL.VC_ARR2;
v_in_text VARCHAR2 (500) := '';
BEGIN
v_selected := APEX_UTIL.STRING_TO_TABLE (:P4_BES);
FOR i IN 1 .. v_selected.COUNT
LOOP
v_in_text := v_in_text || v_selected (i);
IF i < v_selected.COUNT
THEN
-- v_in_text := v_in_text || ', ';
v_in_text := v_in_text || ',';
END IF;
END LOOP;
-- v_in_text := '''' || replace(:P1_SHUTTLE, ':', ''',''') || '''';
:P4_BES_EN := v_in_text;
END;
could anybody help me please?!
now i found the Problem i get the variable example Ap','Fd','Ab and the Problem is thats the variable miss the ' at the beginning and at the end
could anybody tel me how i could add the missing ' in the variable?

Answer 1

try it with
:P4_BES_EN := ''''||v_in_text||'''';
for ' at the beginning and the end.
and i think you have to alter your instr to something like this
:P4_BES_EN := ','''||v_in_text||''',';
AND INSTR (:P4_BES_EN, ','||zl.ds_bes001||',') > 0
e.g.:
DECLARE
v_in_text VARCHAR2 (500) := 'Ap'',''Fd'',''Ab';
BEGIN
v_in_text := ','''||v_in_text||''',';
dbms_output.put_line(v_in_text);
END;