[8i] need help with SLOW queries

First of all, I work in 8i.

Some examples of data:
-- this table actually has ~175 cols and ~40K rows
CREATE TABLE     PART_1
(     part_nbr     CHAR(25)     NOT NULL
,     lead_time     NUMBER(3)
);

INSERT INTO     PART_1
VALUES     ('ABC-100',2);
INSERT INTO     PART_1
VALUES     ('ABC-105G',4);
INSERT INTO     PART_1
VALUES     ('11-205-32',6);
INSERT INTO     PART_1
VALUES     ('RMS1109',8);
INSERT INTO     PART_1
VALUES     ('ABC-1',10);

-- this table actually has ~40 cols and ~700K rows (SELECT COUNT(*) FROM REQS takes a good 30 sec to a min to run)
CREATE TABLE     REQS_1
(     comp_part_nbr     CHAR(25)
,     ord_nbr          CHAR(10)
,     sub_nbr          CHAR(3)
,     qty_reqd     NUMBER(13,4)
,     qty_issued     NUMBER(13,4)
,     date_reqd     DATE
);

INSERT INTO     REQS_1
VALUES     ('ABC-100','0000000110','001',10,0,TO_DATE('08/24/2010','mm/dd/yyyy'));
INSERT INTO     REQS_1
VALUES     ('ABC-100','0000000200','001',10,0,TO_DATE('08/31/2010','mm/dd/yyyy'));
INSERT INTO     REQS_1
VALUES     ('ABC-105G','0000000110','001',5,0,TO_DATE('08/24/2010','mm/dd/yyyy'));
INSERT INTO     REQS_1
VALUES     ('ABC-105G','0000000200','001',5,0,TO_DATE('08/31/2010','mm/dd/yyyy'));
INSERT INTO     REQS_1
VALUES     ('11-205-32','0000000110','001',10,0,TO_DATE('08/24/2010','mm/dd/yyyy'));
INSERT INTO     REQS_1
VALUES     ('11-205-32','0000000200','001',10,0,TO_DATE('08/31/2010','mm/dd/yyyy'));
INSERT INTO     REQS_1
VALUES     ('RMS1109','0000000110','001',30,0,TO_DATE('08/24/2010','mm/dd/yyyy'));
INSERT INTO     REQS_1
VALUES     ('RMS1109','0000000200','001',30,0,TO_DATE('08/31/2010','mm/dd/yyyy'));
INSERT INTO     REQS_1
VALUES     ('ABC-1','S000000025','001',1,0,TO_DATE('09/09/2010','mm/dd/yyyy'));
INSERT INTO     REQS_1
VALUES     ('ABC-1','S000000025','002',1,0,TO_DATE('09/16/2010','mm/dd/yyyy'));

-- these are all the columns in the table, though there are many more rows
CREATE TABLE     CALT
(     clndr_dt     DATE     NOT NULL
,     clndr_yr     NUMBER(4)
,     work_day     NUMBER(3)
,     work_dt          DATE
,     work_wk          NUMBER(2)
,     work_yr          NUMBER(4)
,     work_days     NUMBER(5)
,     clndr_days     NUMBER(6)
);

INSERT INTO CALT VALUES (TO_DATE('08/01/2010','mm/dd/yyyy'),2010,0, TO_DATE('07/30/2010','mm/dd/yyyy'),31,2010,1729,5121);
INSERT INTO CALT VALUES (TO_DATE('08/02/2010','mm/dd/yyyy'),2010,149, TO_DATE('08/02/2010','mm/dd/yyyy'),31,2010,1730,5122);
INSERT INTO CALT VALUES (TO_DATE('08/03/2010','mm/dd/yyyy'),2010,150, TO_DATE('08/03/2010','mm/dd/yyyy'),31,2010,1731,5123);
INSERT INTO CALT VALUES (TO_DATE('08/04/2010','mm/dd/yyyy'),2010,151, TO_DATE('08/04/2010','mm/dd/yyyy'),31,2010,1732,5124);
INSERT INTO CALT VALUES (TO_DATE('08/05/2010','mm/dd/yyyy'),2010,152, TO_DATE('08/05/2010','mm/dd/yyyy'),31,2010,1733,5125);
INSERT INTO CALT VALUES (TO_DATE('08/06/2010','mm/dd/yyyy'),2010,153, TO_DATE('08/06/2010','mm/dd/yyyy'),31,2010,1734,5126);
INSERT INTO CALT VALUES (TO_DATE('08/07/2010','mm/dd/yyyy'),2010,0, TO_DATE('08/06/2010','mm/dd/yyyy'),31,2010,1734,5127);
INSERT INTO CALT VALUES (TO_DATE('08/08/2010','mm/dd/yyyy'),2010,0, TO_DATE('08/06/2010','mm/dd/yyyy'),32,2010,1734,5128);
INSERT INTO CALT VALUES (TO_DATE('08/09/2010','mm/dd/yyyy'),2010,154, TO_DATE('08/09/2010','mm/dd/yyyy'),32,2010,1735,5129);
INSERT INTO CALT VALUES (TO_DATE('08/10/2010','mm/dd/yyyy'),2010,155, TO_DATE('08/10/2010','mm/dd/yyyy'),32,2010,1736,5130);
INSERT INTO CALT VALUES (TO_DATE('08/11/2010','mm/dd/yyyy'),2010,156, TO_DATE('08/11/2010','mm/dd/yyyy'),32,2010,1737,5131);
INSERT INTO CALT VALUES (TO_DATE('08/12/2010','mm/dd/yyyy'),2010,157, TO_DATE('08/12/2010','mm/dd/yyyy'),32,2010,1738,5132);
INSERT INTO CALT VALUES (TO_DATE('08/13/2010','mm/dd/yyyy'),2010,158, TO_DATE('08/13/2010','mm/dd/yyyy'),32,2010,1739,5133);
INSERT INTO CALT VALUES (TO_DATE('08/14/2010','mm/dd/yyyy'),2010,0, TO_DATE('08/13/2010','mm/dd/yyyy'),32,2010,1739,5134);
INSERT INTO CALT VALUES (TO_DATE('08/15/2010','mm/dd/yyyy'),2010,0, TO_DATE('08/13/2010','mm/dd/yyyy'),33,2010,1739,5135);
INSERT INTO CALT VALUES (TO_DATE('08/16/2010','mm/dd/yyyy'),2010,159, TO_DATE('08/16/2010','mm/dd/yyyy'),33,2010,1740,5136);
INSERT INTO CALT VALUES (TO_DATE('08/17/2010','mm/dd/yyyy'),2010,160, TO_DATE('08/17/2010','mm/dd/yyyy'),33,2010,1741,5137);
INSERT INTO CALT VALUES (TO_DATE('08/18/2010','mm/dd/yyyy'),2010,161, TO_DATE('08/18/2010','mm/dd/yyyy'),33,2010,1742,5138);
INSERT INTO CALT VALUES (TO_DATE('08/19/2010','mm/dd/yyyy'),2010,162, TO_DATE('08/19/2010','mm/dd/yyyy'),33,2010,1743,5139);
INSERT INTO CALT VALUES (TO_DATE('08/20/2010','mm/dd/yyyy'),2010,163, TO_DATE('08/20/2010','mm/dd/yyyy'),33,2010,1744,5140);
INSERT INTO CALT VALUES (TO_DATE('08/21/2010','mm/dd/yyyy'),2010,0, TO_DATE('08/20/2010','mm/dd/yyyy'),33,2010,1744,5141);
INSERT INTO CALT VALUES (TO_DATE('08/22/2010','mm/dd/yyyy'),2010,0, TO_DATE('08/20/2010','mm/dd/yyyy'),34,2010,1744,5142);
INSERT INTO CALT VALUES (TO_DATE('08/23/2010','mm/dd/yyyy'),2010,164, TO_DATE('08/23/2010','mm/dd/yyyy'),34,2010,1745,5143);
INSERT INTO CALT VALUES (TO_DATE('08/24/2010','mm/dd/yyyy'),2010,165, TO_DATE('08/24/2010','mm/dd/yyyy'),34,2010,1746,5144);
INSERT INTO CALT VALUES (TO_DATE('08/25/2010','mm/dd/yyyy'),2010,166, TO_DATE('08/25/2010','mm/dd/yyyy'),34,2010,1747,5145);
INSERT INTO CALT VALUES (TO_DATE('08/26/2010','mm/dd/yyyy'),2010,167, TO_DATE('08/26/2010','mm/dd/yyyy'),34,2010,1748,5146);
INSERT INTO CALT VALUES (TO_DATE('08/27/2010','mm/dd/yyyy'),2010,168, TO_DATE('08/27/2010','mm/dd/yyyy'),34,2010,1749,5147);
INSERT INTO CALT VALUES (TO_DATE('08/28/2010','mm/dd/yyyy'),2010,0, TO_DATE('08/27/2010','mm/dd/yyyy'),34,2010,1749,5148);
INSERT INTO CALT VALUES (TO_DATE('08/29/2010','mm/dd/yyyy'),2010,0, TO_DATE('08/27/2010','mm/dd/yyyy'),35,2010,1749,5149);
INSERT INTO CALT VALUES (TO_DATE('08/30/2010','mm/dd/yyyy'),2010,169, TO_DATE('08/30/2010','mm/dd/yyyy'),35,2010,1750,5150);
INSERT INTO CALT VALUES (TO_DATE('08/31/2010','mm/dd/yyyy'),2010,170, TO_DATE('08/31/2010','mm/dd/yyyy'),35,2010,1751,5151);
INSERT INTO CALT VALUES (TO_DATE('09/01/2010','mm/dd/yyyy'),2010,171, TO_DATE('09/01/2010','mm/dd/yyyy'),35,2010,1752,5152);
INSERT INTO CALT VALUES (TO_DATE('09/02/2010','mm/dd/yyyy'),2010,172, TO_DATE('09/02/2010','mm/dd/yyyy'),35,2010,1753,5153);
INSERT INTO CALT VALUES (TO_DATE('09/03/2010','mm/dd/yyyy'),2010,173, TO_DATE('09/03/2010','mm/dd/yyyy'),35,2010,1754,5154);
INSERT INTO CALT VALUES (TO_DATE('09/04/2010','mm/dd/yyyy'),2010,0, TO_DATE('09/03/2010','mm/dd/yyyy'),35,2010,1754,5155);
INSERT INTO CALT VALUES (TO_DATE('09/05/2010','mm/dd/yyyy'),2010,0, TO_DATE('09/03/2010','mm/dd/yyyy'),36,2010,1754,5156);
INSERT INTO CALT VALUES (TO_DATE('09/06/2010','mm/dd/yyyy'),2010,0, TO_DATE('09/03/2010','mm/dd/yyyy'),36,2010,1754,5157);
INSERT INTO CALT VALUES (TO_DATE('09/07/2010','mm/dd/yyyy'),2010,174, TO_DATE('09/07/2010','mm/dd/yyyy'),36,2010,1755,5158);
INSERT INTO CALT VALUES (TO_DATE('09/08/2010','mm/dd/yyyy'),2010,175, TO_DATE('09/08/2010','mm/dd/yyyy'),36,2010,1756,5159);
INSERT INTO CALT VALUES (TO_DATE('09/09/2010','mm/dd/yyyy'),2010,176, TO_DATE('09/09/2010','mm/dd/yyyy'),36,2010,1757,5160);
INSERT INTO CALT VALUES (TO_DATE('09/10/2010','mm/dd/yyyy'),2010,177, TO_DATE('09/10/2010','mm/dd/yyyy'),36,2010,1758,5161);
INSERT INTO CALT VALUES (TO_DATE('09/11/2010','mm/dd/yyyy'),2010,0, TO_DATE('09/10/2010','mm/dd/yyyy'),36,2010,1758,5162);
INSERT INTO CALT VALUES (TO_DATE('09/12/2010','mm/dd/yyyy'),2010,0, TO_DATE('09/10/2010','mm/dd/yyyy'),37,2010,1758,5163);
INSERT INTO CALT VALUES (TO_DATE('09/13/2010','mm/dd/yyyy'),2010,178, TO_DATE('09/13/2010','mm/dd/yyyy'),37,2010,1759,5164);
INSERT INTO CALT VALUES (TO_DATE('09/14/2010','mm/dd/yyyy'),2010,179, TO_DATE('09/14/2010','mm/dd/yyyy'),37,2010,1760,5165);
INSERT INTO CALT VALUES (TO_DATE('09/15/2010','mm/dd/yyyy'),2010,180, TO_DATE('09/15/2010','mm/dd/yyyy'),37,2010,1761,5166);
INSERT INTO CALT VALUES (TO_DATE('09/16/2010','mm/dd/yyyy'),2010,181, TO_DATE('09/16/2010','mm/dd/yyyy'),37,2010,1762,5167);
INSERT INTO CALT VALUES (TO_DATE('09/17/2010','mm/dd/yyyy'),2010,182, TO_DATE('09/17/2010','mm/dd/yyyy'),37,2010,1763,5168);
INSERT INTO CALT VALUES (TO_DATE('09/18/2010','mm/dd/yyyy'),2010,0, TO_DATE('09/17/2010','mm/dd/yyyy'),37,2010,1763,5169);
INSERT INTO CALT VALUES (TO_DATE('09/19/2010','mm/dd/yyyy'),2010,0, TO_DATE('09/17/2010','mm/dd/yyyy'),38,2010,1763,5170);
INSERT INTO CALT VALUES (TO_DATE('09/20/2010','mm/dd/yyyy'),2010,183, TO_DATE('09/20/2010','mm/dd/yyyy'),38,2010,1764,5171);
INSERT INTO CALT VALUES (TO_DATE('09/21/2010','mm/dd/yyyy'),2010,184, TO_DATE('09/21/2010','mm/dd/yyyy'),38,2010,1765,5172);
INSERT INTO CALT VALUES (TO_DATE('09/22/2010','mm/dd/yyyy'),2010,185, TO_DATE('09/22/2010','mm/dd/yyyy'),38,2010,1766,5173);
INSERT INTO CALT VALUES (TO_DATE('09/23/2010','mm/dd/yyyy'),2010,186, TO_DATE('09/23/2010','mm/dd/yyyy'),38,2010,1767,5174);
INSERT INTO CALT VALUES (TO_DATE('09/24/2010','mm/dd/yyyy'),2010,187, TO_DATE('09/24/2010','mm/dd/yyyy'),38,2010,1768,5175);
INSERT INTO CALT VALUES (TO_DATE('09/25/2010','mm/dd/yyyy'),2010,0, TO_DATE('09/24/2010','mm/dd/yyyy'),38,2010,1768,5176);
INSERT INTO CALT VALUES (TO_DATE('09/26/2010','mm/dd/yyyy'),2010,0, TO_DATE('09/24/2010','mm/dd/yyyy'),39,2010,1768,5177);
INSERT INTO CALT VALUES (TO_DATE('09/27/2010','mm/dd/yyyy'),2010,188, TO_DATE('09/27/2010','mm/dd/yyyy'),39,2010,1769,5178);
INSERT INTO CALT VALUES (TO_DATE('09/28/2010','mm/dd/yyyy'),2010,189, TO_DATE('09/28/2010','mm/dd/yyyy'),39,2010,1770,5179);
INSERT INTO CALT VALUES (TO_DATE('09/29/2010','mm/dd/yyyy'),2010,190, TO_DATE('09/29/2010','mm/dd/yyyy'),39,2010,1771,5180);
INSERT INTO CALT VALUES (TO_DATE('09/30/2010','mm/dd/yyyy'),2010,191, TO_DATE('09/30/2010','mm/dd/yyyy'),39,2010,1772,5181);
First of all, if I run
 
DEFINE     days_out = 10

     SELECT     p.part_nbr
     ,     p.lead_time
     ,     r.date_reqd     
     ,     c2.clndr_dt               AS order_by
     FROM     REQS_1 r
     ,     PART_1 p
     ,     CALT c
     ,     CALT c2
     WHERE     p.part_nbr                    = r.comp_part_nbr
     AND     TRUNC(r.date_reqd)               = TRUNC(c.clndr_dt)
     AND     c2.work_days                    = c.work_days     - p.lead_time
     AND     c2.work_day                    <> 0
--     AND     c2.clndr_dt                    <= SYSDATE + &days_out
against my real data, I get:
117969 rows selected.


Execution Plan
----------------------------------------------------------
   0      SELECT STATEMENT Optimizer=RULE
   1    0   NESTED LOOPS
   2    1     NESTED LOOPS
   3    2       MERGE JOIN
   4    3         SORT (JOIN)
   5    4           TABLE ACCESS (FULL) OF 'CALT'
   6    3         SORT (JOIN)
   7    6           TABLE ACCESS (FULL) OF 'REQS_1'
   8    2       TABLE ACCESS (BY INDEX ROWID) OF 'PART_1'
   9    8         INDEX (RANGE SCAN) OF 'PART_1_PK' (UNIQUE)
  10    1     TABLE ACCESS (BY INDEX ROWID) OF 'CALT'
  11   10       INDEX (RANGE SCAN) OF 'CALT_IX4' (NON-UNIQUE)




Statistics
----------------------------------------------------------
          0  recursive calls
        323  db block gets
     997239  consistent gets
      34095  physical reads
          0  redo size
    9858097  bytes sent via SQL*Net to client
     550791  bytes received via SQL*Net from client
       7866  SQL*Net roundtrips to/from client
          0  sorts (memory)
          2  sorts (disk)
     117969  rows processed

timing for: query_timer
Elapsed: 00:00:58.69
The problem is that if I have a comment on the last line of the query, it is not essentially executed. With my complete query, I got "no more room in the temp space" errors of type, or it takes hours to run. My big problem is that I can't get just the plan of the explain output for the query (with this last line is not commented out). So I am successfully able to display a map to explain, I have just set autotrace on, which means that the query should work first before I get the plan of the explain command. This does not work so well when the query takes hours to run (or not at all)...

Anyone have any suggestions for me?

If the test data really resembles your production data then you don't need the TRUNC around comparison of date column. However if this is not the case, then you can add an index of feature based on TRUNC (r.date_reqd). And check if that helps avoid the merge join.

Second thing, I don't really understand is why you must join the CSPA table twice? What logical reason (business) is behind all this?

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    The community team

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    The Xbox Ambassador says:
    Location of Ambassador of the community...
    The Xbox Ambassador says:
    Location of Ambassador of the community...
    The Xbox Ambassador says:
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    Hello
    Terry wrote:
    Hello
    The Xbox Ambassador says:
    Hey
    Terry wrote:
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    The Xbox Ambassador says:
    ok\
    The Xbox Ambassador says:
    What is your problem?
    Terry wrote:
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    Terry wrote:
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    Wow good
    Terry wrote:
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    Terry wrote:
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    Oh. No,
    Terry wrote:
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    Maybe it was auto bought?
    Terry wrote:
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    I do not know.
    Terry wrote:
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    The Xbox Ambassador says:
    Oh. It's bad.
    The Xbox Ambassador says:
    I think that if you Exchange 1 code it will buy it
    Terry wrote:
    car pack code worked, starter pack did not work
    The Xbox Ambassador says:
    Oh.
    The Xbox Ambassador says:
    It's a bad
    The Xbox Ambassador says:
    BTW you have an evolution of the tests?
    Terry wrote:
    Yes, I want to? but more anxious to get a code object generated for this pack
    The Xbox Ambassador says:
    Hey if I help can u give me this game too?
    Terry wrote:
    ?????????????????
    Terry wrote:
    So is it possible to get a code for that time?
    The Xbox Ambassador says:
    Hey
    The Xbox Ambassador says:
    Yes.
    The Xbox Ambassador says:
    you need to contact them
    The Xbox Ambassador says:
    and tell them that the code is used.
    Terry wrote:
    I was told to come here? where can I go to get the code?

    Hi Terryg76,

    ·         What version of the operating system is installed on the computer?

    I suggest you to contact the game manufacturer for more help and information.

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