Avoid Hard Parsing for executing dynamic SQL using DUAL table Oracle

Question

I want to know if dynamic sql statements involving DUAL table can be modified to remove HARD PARSING.
We have several SQL statements are stored in configuration table, here is sample example
-- query 1 before replacing index values as stored in config table ---
select count(*) from dual where  'REPLACE_VALUE_OF_INDEX_3' IN ('K')
AND (('REPLACE_VALUE_OF_INDEX_13' IN ('1053','1095','1199') ) OR ('REPLACE_VALUE_OF_INDEX_13' IN ('1200') ))
AND 'REPLACE_VALUE_OF_INDEX_2' IN ('6')
AND 'REPLACE_VALUE_OF_INDEX_15' IN ('870001305')
-- query 1 after replacing index values--
select count(*) from dual where  'REPLACE_VALUE_OF_INDEX_10' IN ('K')
AND (('1030' IN ('1053','1095','1199') ) OR ('1030' IN ('1200') ))
AND '2' IN ('6')
AND 'X' IN ('870001305')
-- query 2 before replacing index values as stored in config table --
select count(*) from dual where  'REPLACE_VALUE_OF_INDEX_5' IN ('361A','362A')
AND 'REPLACE_VALUE_OF_INDEX_22' BETWEEN '200707' AND '200806'
-- query 2 after replacing index values--
select count(*) from dual where  '3MAA' IN ('361A','362A') AND '201304' BETWEEN '200707' AND '200806'

Answer 1

If I got it right you have some (maybe lots of) conditions stored in a table (be patient - it's my interpretation)
create table eb_conditions as
select 1 rid,q'{:5 IN ('361A','362A') AND :3 BETWEEN '200707' AND '200806'}' cndtn from dual union all
select 2,q'{:2 IN ('361A','362A') AND :3 BETWEEN '200707' AND '200806'}' from dual union all
select 3,q'{:1 IN ('K') AND ((:2 IN ('1053','1095','1199') ) OR (:4 IN ('1200') )) AND :3 IN ('6') AND :5 IN ('870001305')}' from dual
RID
CNDTN
1
:5 IN ('361A','362A') AND :3 BETWEEN '200707' AND '200806'
2
:2 IN ('361A','362A') AND :3 BETWEEN '200707' AND '200806'
3
:1 IN ('K') AND ((:2 IN ('1053','1095','1199') ) OR (:4 IN ('1200') )) AND :3 IN ('6') AND :5 IN ('870001305')
and you have to check the conditions using values stored in an array
I used a table instead: the vl at rid = 1 representing the value of bind variable :1 in eb_conditions table and so on ...
create table eb_array as
select 1 rid,'K' vl from dual union all
select 2,'1199' from dual union all
select 3,'200803' from dual union all
select 4,'1000' from dual union all
select 5,'870001305' from dual
RID
VL
1
K
2
1199
3
200803
4
1000
5
870001305
You want to check the conditions using select count(*) from dual where <condition with binds substituted fron the array>
Judging from the title Hard Parsing represents the major problem and you cannot avoid it since every condition to be verified is different from every other condition.
I think your best bet is not to evaluate conditions row by row - context shift cannot be avoided and there might be more than one for each iteration.
So try to do it in a single step:
declare
w_cndtn varchar2(4000);
w_clob  clob;
w_cursor sys_refcursor;
one number;
two number;
begin
  dbms_lob.createtemporary(w_clob,false);
  for rw in (select rid,
                    max(cndtn) cndtn,
                    listagg(val,',') within group (order by rn)||',' usng
               from (select c.rid,c.cndtn,c.rn,c.bind,
                            replace(rtrim(c.bind),':'||to_char(v.rid),''''||v.vl||'''') val
                       from (select rid,
                                    cndtn,
                                    regexp_substr(cndtn,':\d+ ',1,level) bind,
                                    level rn
                               from eb_conditions
                             connect by level <= regexp_count(cndtn,':')
                                    and prior rid = rid
                                    and prior sys_guid() is not null
                            ) c,
                            eb_array v
                      where instr(c.bind,':'||v.rid||' ') > 0
              group by rid
  loop
    w_cndtn := rw.cndtn;
    while instr(w_cndtn,':') > 0
    loop
      w_cndtn := replace(w_cndtn,trim(regexp_substr(w_cndtn,':\d+ ',1,1)),substr(rw.usng,1,instr(rw.usng,',') - 1));
      rw.usng := substr(rw.usng,instr(rw.usng,',') + 1);
    end loop;
    w_cndtn := 'select '||to_char(rw.rid)||' cndtn_id,count(*) from dual where '||w_cndtn||' union all ';
    w_clob := w_clob ||' '||w_cndtn;
  end loop;
  w_clob := substr(w_clob,1,instr(w_clob,'union all',-1,1) - 1);
  open w_cursor for w_clob;
  loop
    fetch w_cursor into one,two;
    exit when w_cursor%notfound;
    dbms_output.put_line(to_char(one)||':'||to_char(two));
  end loop;
  dbms_lob.freetemporary(w_clob);
end;
1:0
2:0
3:0
Statement processed.
Regards
Etbin