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Question

Guys,
SQL> select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for Solaris: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
Problem: I wrote a procedure to parse a varchar2 field of a table.
It contains long strings. These strings are put into that column
by a java application. The procedure has an inline view which retrieve
records containing certain string pattern. The table has about
2 million records. After procedure gets the strings from the
inline view; for a particular pattern I found that inline view should
be containing 600k records; the Oracle regex function parses to put
the relevant parts into separate columns. At first, I thought, may be
inline view is the culprit. So, I created a staging table and ran my
procedure on it; I created a BTree index on the column. But, no results.
Then I thought DISTINCT keyword is the problem. Removed it, but still procedure
doesn't populate the tables. I am not sure what is going on. Even DBAs are
not sure. I told them to create an index on varchar2 column of original table. They have
created it but no improvement. Would someone please advice? I am new to sql tuning.
Is there any tutorial which explains with examples about sql tuning - I mean,
I am looking for something like
1. explain plan - What every field means?
2. dbms_prof - How to readthe output?
3. trace - how to use it? etc.
Thanks in advance!
CREATE OR REPLACE PROCEDURE prc_parse
IS
--  Purpose: Procedure to parse column of table
             to retrieve crit, points,
             comment, morecomment and
             overallcomment.
--  MODIFICATION HISTORY
--  Person          Date       Comments
TYPE src_crit IS TABLE OF subtable.column1%TYPE;
TYPE src_points IS TABLE OF subtable.column1%TYPE;
TYPE src_comment IS TABLE OF subtable.column1%TYPE;
TYPE src_morecomment IS TABLE OF subtable.column1%TYPE;
TYPE src_overall_comment IS TABLE OF subtable.column1%TYPE;
src_crit_array   src_crit;
src_points_array   src_points;
src_comment_array   src_comment;
src_morecomment_array   src_morecomment;
src_overall_comment_array   src_overall_comment;
CURSOR cur_latest
IS
SELECT   DISTINCT
         TRIM(REPLACE(REPLACE(SUBSTR(REGEXP_SUBSTR(string,'Crit:</strong>[^<]+', 1, level), 15),CHR(13),''),CHR(10),'')) crit,
         TRIM(REPLACE(REPLACE(SUBSTR(REGEXP_SUBSTR(string,'points [^\)]+', 1, level), 8),CHR(13),''),CHR(10),'')) points,
         TRIM(REPLACE(REPLACE(SUBSTR(REGEXP_SUBSTR(string,'\):[^<]+', 1, level), 3),CHR(13),''),CHR(10),'')) comment,
         TRIM(REPLACE(REPLACE(SUBSTR(REGEXP_SUBSTR(string,'blockquote>[^<]+', 1, level), 12),CHR(13),''),CHR(10),'')) morecomment,
         TRIM(REPLACE(REPLACE(SUBSTR(string, INSTR(string, '>', -1) + 1),CHR(13),''),CHR(10),'')) overallcomment
  FROM   (SELECT  column1 string
             FROM subtable
            WHERE column1 LIKE '<strong>Crit:</strong>%'
CONNECT BY LEVEL <= (LENGTH(string) - LENGTH(REPLACE(string, 'Crit:')))/5;
BEGIN
    OPEN cur_latest;
    LOOP
       FETCH cur_latest
       BULK COLLECT INTO   src_crit_array,
                           src_points_array,
                           src_comment_array,
                           src_morecomment_array,
                           src_overall_comment_array
                    LIMIT 100;
        FORALL i in 1 .. src_crit_array.COUNT
            INSERT INTO test_parse_table1 (
                                                    crit,
                                                    points,
                                                    comment,
                                                    morecomment
                                           VALUES (
                                                    src_crit_array(i),
                                                    src_points_array(i),
                                                    src_comment_array(i),
                                                    src_morecomment_array(i)
            FORALL i in 1 .. src_crit_array.COUNT         
            INSERT INTO test_parse_table2 (
                                                 overallcomment
                                       VALUES (
                                                 src_overallcomment_array(i)
       EXIT WHEN cur_latest%NOTFOUND;
          COMMIT;
    END LOOP;
   COMMIT;
EXCEPTION
  WHEN OTHERS THEN
    ROLLBACK;
    DBMS_OUTPUT.PUT_LINE('Error:'||sqlerrm);
    COMMIT;
END;
/Edited by: abyss on Sep 19, 2010 6:03 PM
Edited by: abyss on Oct 1, 2010 9:27 AM

Answer 1

Abyss,
You can do multiple inserts using the FORALL stmt, I dont see any thing wrong with that code bit.
I tried it with the below eg & it worked fine for me ...
create table TBL_TEST
  col1 NUMBER,
  col2 NUMBER,
  col3 CHAR(1)
create table tbl_test2
as
select t.col1, t.col2 from tbl_test t where 1=2;
create table tbl_test3
as
select t.* from tbl_test t where 1=2;
declare
type lt_prod_row is table of tbl_test.col1%type;
type lt_sup_row is table of tbl_test.col2%type;
type lt_pri_row is table of tbl_test.col3%type;
ltc1r lt_col1_row;
ltc2r lt_col2_row;
ltc3r lt_col3_row;
begin
select tbl.col1, tbl.col2, tbl.col3
bulk collect into ltc1r, ltc2r, ltc3r
from tbl_test tbl;
dbms_output.put_line(ltc1r.count);
forall i in 1..ltc1r.count
        insert into tbl_test3 values (ltc1r(i), ltc2r(i), ltc3r(i));
forall i in 1..ltc1r.count
        insert into tbl_test2 (col1, col2) values (ltc1r(i), ltc2r(i));
end;Which line of your code are you getting the error ?