Adding column is taking much time. How to avoid?

ALTER TABLE CONTACT_DETAIL
ADD (ISIMDSCONTACT_F NUMBER(1) DEFAULT 0 NOT NULL
,ISREACHCONTACT_F NUMBER(1) DEFAULT 0 NOT NULL
Is there any way that to speed up the execution time of the query?
It's more than 24 hrs completed after started running the above script.
I do not know why it is taking much time.
Size of the table is 30 MB.

To add a column the row directory of every record must be rewritten.
Obviously this will take time and produce redo.
Whenever something is slow the first question you need to answer is
'What is it waiting for?' You can do so by investigating by various v$ views.
Also, after more than 200 'I can not be bothered to do any research on my own' questions, you should know you don't post here without posting a four digit version number and a platform,
as volunteers aren't mind readers.
If you want to continue to withheld information, please consider NOT posting here.
Sybrand Bakker
Senior Oracle DBA
Experts: those who did read documentatiion and can be bothered to investigate their own problems.

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Hi Srinivas;
Please follow this search and see its helpful
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Query taking much time.

Hi All,
I have one query which is taking much time in dev envi where data size is very small and planning to implement this query in production database where database size is huge. Plz let me know how I can optimize this query.
select count(*) from
select /*+ full(tls) full(tlo) parallel(tls,2) parallel(tls, 2) */
tls.siebel_ba, tls.msisdn
from
TDB_LIBREP_SIEBEL tls, TDB_LIBREP_ONDB tlo
where
tls.siebel_ba = tlo.siebel_ba (+) and
tls.msisdn = tlo.msisdn (+) and
tlo.siebel_ba is null and
tlo.msisdn is null
union
select /*+ full(tls) full(tlo) parallel(tls,2) parallel(tls, 2) */
tlo.siebel_ba, tlo.msisdn
from
TDB_LIBREP_SIEBEL tls, TDB_LIBREP_ONDB tlo
where
tls.siebel_ba (+) = tlo.siebel_ba and
tls.msisdn (+) = tlo.msisdn and
tls.siebel_ba is null and
tls.msisdn is null
explain plan of above query is
| Id | Operation | Name | Rows | Bytes | Cost | TQ |IN-OUT| PQ Distrib |
| 0 | SELECT STATEMENT | | 1 | | 14 | | | |
| 1 | SORT AGGREGATE | | 1 | | | | | |
| 2 | SORT AGGREGATE | | 1 | | | 41,04 | P->S | QC (RAND) |
| 3 | VIEW | | 164 | | 14 | 41,04 | PCWP | |
| 4 | SORT UNIQUE | | 164 | 14104 | 14 | 41,04 | PCWP | |
| 5 | UNION-ALL | | | | | 41,03 | P->P | HASH |
|* 6 | FILTER | | | | | 41,03 | PCWC | |
|* 7 | HASH JOIN OUTER | | | | | 41,03 | PCWP | |
| 8 | TABLE ACCESS FULL| TDB_LIBREP_SIEBEL | 82 | 3526 | 1 | 41,03 | PCWP | |
| 9 | TABLE ACCESS FULL| TDB_LIBREP_ONDB | 82 | 3526 | 2 | 41,00 | S->P | BROADCAST |
|* 10 | FILTER | | | | | 41,03 | PCWC | |
|* 11 | HASH JOIN OUTER | | | | | 41,03 | PCWP | |
| 12 | TABLE ACCESS FULL| TDB_LIBREP_ONDB | 82 | 3526 | 2 | 41,01 | S->P | HASH |
| 13 | TABLE ACCESS FULL| TDB_LIBREP_SIEBEL | 82 | 3526 | 1 | 41,02 | P->P | HASH |
Predicate Information (identified by operation id):
6 - filter("TLO"."SIEBEL_BA" IS NULL AND "TLO"."MSISDN" IS NULL)
7 - access("TLS"."SIEBEL_BA"="TLO"."SIEBEL_BA"(+) AND "TLS"."MSISDN"="TLO"."MSISDN"(+))
10 - filter("TLS"."SIEBEL_BA" IS NULL AND "TLS"."MSISDN" IS NULL)
11 - access("TLS"."SIEBEL_BA"(+)="TLO"."SIEBEL_BA" AND "TLS"."MSISDN"(+)="TLO"."MSISDN")

user3479748 wrote:
Hi All,
I have one query which is taking much time in dev envi where data size is very small and planning to implement this query in production database where database size is huge. Plz let me know how I can optimize this query.
select count(*) from
select /*+ full(tls) full(tlo) parallel(tls,2) parallel(tls, 2) */
tls.siebel_ba, tls.msisdn
from
TDB_LIBREP_SIEBEL tls, TDB_LIBREP_ONDB tlo
where
tls.siebel_ba = tlo.siebel_ba (+) and
tls.msisdn = tlo.msisdn (+) and
tlo.siebel_ba is null and
tlo.msisdn is null
union
select /*+ full(tls) full(tlo) parallel(tls,2) parallel(tls, 2) */
tlo.siebel_ba, tlo.msisdn
from
TDB_LIBREP_SIEBEL tls, TDB_LIBREP_ONDB tlo
where
tls.siebel_ba (+) = tlo.siebel_ba and
tls.msisdn (+) = tlo.msisdn and
tls.siebel_ba is null and
tls.msisdn is null
) ;explain plan of above query is
| Id | Operation                | Name              | Rows | Bytes | Cost | TQ    |IN-OUT| PQ Distrib |
|   0 | SELECT STATEMENT         |                    |     1 |       |    14 |        |      |            |
|   1 | SORT AGGREGATE          |                    |     1 |       |       |        |      |            |
|   2 |   SORT AGGREGATE         |                    |     1 |       |       | 41,04 | P->S | QC (RAND) |
|   3 |    VIEW                  |                    |   164 |       |    14 | 41,04 | PCWP |            |
|   4 |     SORT UNIQUE          |                    |   164 | 14104 |    14 | 41,04 | PCWP |            |
|   5 |      UNION-ALL           |                    |       |       |       | 41,03 | P->P | HASH       |
|* 6 |       FILTER             |                    |       |       |       | 41,03 | PCWC |            |
|* 7 |        HASH JOIN OUTER   |                    |       |       |       | 41,03 | PCWP |            |
|   8 |         TABLE ACCESS FULL| TDB_LIBREP_SIEBEL |    82 | 3526 |     1 | 41,03 | PCWP |            |
|   9 |         TABLE ACCESS FULL| TDB_LIBREP_ONDB    |    82 | 3526 |     2 | 41,00 | S->P | BROADCAST |
|* 10 |       FILTER             |                    |       |       |       | 41,03 | PCWC |            |
|* 11 |        HASH JOIN OUTER   |                    |       |       |       | 41,03 | PCWP |            |
| 12 |         TABLE ACCESS FULL| TDB_LIBREP_ONDB    |    82 | 3526 |     2 | 41,01 | S->P | HASH       |
| 13 |         TABLE ACCESS FULL| TDB_LIBREP_SIEBEL |    82 | 3526 |     1 | 41,02 | P->P | HASH       |
Predicate Information (identified by operation id):
6 - filter("TLO"."SIEBEL_BA" IS NULL AND "TLO"."MSISDN" IS NULL)
7 - access("TLS"."SIEBEL_BA"="TLO"."SIEBEL_BA"(+) AND "TLS"."MSISDN"="TLO"."MSISDN"(+))
10 - filter("TLS"."SIEBEL_BA" IS NULL AND "TLS"."MSISDN" IS NULL)
11 - access("TLS"."SIEBEL_BA"(+)="TLO"."SIEBEL_BA" AND "TLS"."MSISDN"(+)="TLO"."MSISDN")
I dunno, it looks like you are getting all the things that are null with an outer join, so won't that decide to full scan anyways? Plus the union means it will do it twice and do a distinct to get rid of dups - see how it does a union all and then sort unique. Somehow I have the feeling there might be a more trick way to do what you want, so maybe you should state exactly what you want in English.

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Hi Friends,
 There is report for Goods movement rel. to Service orders + Acc.indicator.
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<removed by moderator>
The part of report Soure code is as below:
<long code part removed by moderator>
Thanks and Regards,
Rama chary.P
Moderator message: please stay within the 2500 character limit to preserve formatting, only post relevant portions of the code, also please read the following sticky thread before posting.
Please Read before Posting in the Performance and Tuning Forum
locked by: Thomas Zloch on Sep 15, 2010 11:40 AM

Hi Friends,
 There is report for Goods movement rel. to Service orders + Acc.indicator.
 We have two testing Systems(EBQ for developer and PEQ from client side).
 EBQ system contains replica of PEQ every month.
 This report is not taking much time in EBQ.But it is taking much time in PEQ.For the selection criteria I have given,both systems have same data(Getting same output).
The report has the follwoing fields on the selection criteria:
A_MJAHR Material Doc. Year (Mandatory)
S_BLDAT Document Date(Optional)
S_BUDAT Posting Date(Optional)
S_LGORT Storage Location(Optional)
S_MATNR Material(Optional)
S_MBLNR Material Documen(Optional)t
S_WERKS Plant(Optional)
Client not agrrying to make Material Documen as Mandatory.
The main (first) table hit is on AUFM table .As there are non-key fileds as well in where condition,We have cretaed a secondary index as well for AUFM table on the following fields:
BLDAT
BUDAT
MATNR
WERKS
LGORT
Even then also ,in PEQ sytem the report is taking very long time ,Some times not even getting the ALV output.
What can be done to get teh report executed very fast.
<removed by moderator>
The part of report Soure code is as below:
<long code part removed by moderator>
Thanks and Regards,
Rama chary.P
Moderator message: please stay within the 2500 character limit to preserve formatting, only post relevant portions of the code, also please read the following sticky thread before posting.
Please Read before Posting in the Performance and Tuning Forum
locked by: Thomas Zloch on Sep 15, 2010 11:40 AM

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select * from a005 into table i_a005 for all wntries in it_table
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Edited by: TVC6784 on Jun 30, 2011 3:31 PM

TVC6784 wrote:
Hi Yuri ,
>
> Thanks for your reply....I will check as per your comment...
> bUT if i remove field KNUMH From selection condition and also for all entries in it_itab , than data fetch very fast As KNUMH is not primary key..
> . the example is below
>
> select * from a005 into table i_a005
> where kappl = 'V'
> and kschl IN s_kschl
> and vkorg in s_vkorg
> and vtweg in s_vtgew
> and matnr in s_matnr.
>
> Can you comment anything about it ?
>
> And can you please say how can i check its size as you mention that is 2-3 Mb More   ?
>
> Edited by: TVC6784 on Jun 30, 2011 7:37 PM
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Adding column is taking much time. How to avoid?

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