Parse large delimited column

Question

Hello
I have a column which contains over 25000 chars delimited by a ";". The column is a clob.
I need to parse it and insert then as rows into another table. I have the following code:
SELECT CODE
          BULK COLLECT INTO l_tab_codes     
          FROM (
     SELECT SUBSTR(CODE,
          INSTR (CODE, ';', 1, ROWNUM ) + 1,
                         INSTR (CODE, ';', 1, ROWNUM+1) - INSTR(TRIM(CODE), ';', 1, ROWNUM) -1
                         ) AS CODE
               FROM (SELECT ';'||REC.CODE_2||';' AS CODE
FROM dual
                    CONNECT BY LEVEL <= LENGTH(TRIM(REC.CODE_2))-LENGTH(REPLACE(TRIM(REC.CODE_2),';',''))+1 )
          WHERE INSTR(CODE,'-',1)=0;
     FORALL l_tab_codes_index IN l_tab_codes.FIRST .. l_tab_codes.LAST
     INSERT INTO RATE_SUPP_TERM_TEMP (RATE_LOAD_ID,CODE_1,NAME,RATE,FILE_CHANGE_TYPE,EFFECTIVE_DATE)
          VALUES (i_rateloadid,TRIM(REC.CODE_1)||TRIM(l_tab_codes(l_tab_codes_index)),REC.NAME,REC.RATE,REC.CHANGE_TYPE,REC.EFFECTIVE_DATE);
It takes over 3minutes to run and I need to get it to run under a minute.
Can some see a faster way of doing this.
Oracle 10g Rel 2.
Thanks

Answer 1

DECLARE
BEGIN
FOR REC IN ( select RATE_LOAD_ID,CODE_1,NAME,RATE,FILE_CHANGE_TYPE,EFFECTIVE_DATE from DAN) LOOP -- code_1 is a clob of numbers delimited by ";"
I find some logical error just in your program - i guess. Correct me if i'm wrong. You didn't use any order by clause here in the above lines.
So,
select RATE_LOAD_ID,CODE_1,NAME,RATE,FILE_CHANGE_TYPE,EFFECTIVE_DATE from DANThis particular select statement fetch data randomly every time when you execute this query. ----- (1)
>
     SELECT CODE
          BULK COLLECT INTO l_tab_codes     You are storing your data without using any ordering. That means again, here we can see the same effect. ----- (2)
          FROM (
     SELECT SUBSTR(CODE,
          INSTR (CODE, ';', 1, ROWNUM ) + 1,
                         INSTR (CODE, ';', 1, ROWNUM+1) - INSTR(TRIM(CODE), ';', 1, ROWNUM) -1
                         ) AS CODE
               FROM (SELECT ';'||REC.CODE_2||';' AS CODE
FROM dual
                    CONNECT BY LEVEL <= LENGTH(TRIM(REC.CODE_2))-LENGTH(REPLACE(TRIM(REC.CODE_2),';',''))+1 )
          WHERE INSTR(CODE,'-',1)=0;
          The above one indeed a good parsing. But, what happen next ->
     FORALL l_tab_codes_index IN l_tab_codes.FIRST .. l_tab_codes.LAST
     INSERT INTO RATE_SUPP_TERM_TEMP (RATE_LOAD_ID,CODE_1,NAME,RATE,FILE_CHANGE_TYPE,EFFECTIVE_DATE)
          VALUES Hmmm..... :(
(i_rateloadid,TRIM(REC.CODE_1)||TRIM(l_tab_codes(l_tab_codes_index)),REC.NAME,REC.RATE,REC.CHANGE_TYPE,REC.EFFECTIVE_DATE);Now, Taking ref from (1) & (2) :::: here you are inserting data which is coming out from two different sources in random order and get inserted here. But, there should be some relational link between these two sources.
END LOOP;
END;Is this really your required output? Data may be loaded but is that you called it genuine purified data? I don't think so.
Please share your logical explanation here - may be i'm missing something as it is almost 1 am here in india. Sleeps kicked in.. ;)
Regards.
Satyaki De.