In my database is present undesirable parallelization of the query. All involved tables has degree=1,
if I right understood there is no method to avoid this except reducing of degree of indexes ? I'm using 11.2.0.3
Is it possible to run a single procedure in parallel. (Not looking for multifple, using DBMS_JOB)
I am using Oracle 9i.
Oracle Version is 11g.
I need to call the same procedure with different parameter multiple time in parallel.
I have job_control Table
CREATE TABLE JOB_CONTROL
(
JOB_CONTROL_ID NUMBER NOT NULL,
JOB_SEQ_NO NUMBER NOT NULL,
MODULE_NAME VARCHAR2(32 BYTE) NOT NULL,
JOB_STATUS VARCHAR2(15 BYTE),
NO_OF_RECORDS NUMBER,
PROCESSED_RECORDS NUMBER
);
Insert into JOB_CONTROL
(JOB_CONTROL_ID, JOB_SEQ_NO, MODULE_NAME, JOB_STATUS, NO_OF_RECORDS)
Values
(20, 1, 'SALES', NULL, 5);
Insert into JOB_CONTROL
[code]........
Now the table look like this.
JOB_CONTROL_IDJOB_SEQ_NOMODULE_NAMEJOB_STATUSNO_OF_RECORDSPROCESSED_RECORDS
201SALES5
212SALES5
223SALES5
234SALES5
245SALES5
256SALES3
based on the data available in table i wanted to execute a procedure 6 times
create table job_table
(now date, seq_no number)
the procedure will have one parameter as job_seq_no
create of replace procedure job_call (i_job_seq_no number)
is
begin
for i in 1.. i_job_seq_no
loop
insert into job_table
values
[code]......
the problem is i want to do this activity in parallel , i.e. all six calls to the procedure would be parallel. and this will be one time activity.
My SQLPULS script below generates 2 million records and it works fine without any errors, which I run from my batch file. (sqlplus -S %CONNECT% @"SCRIPTSmysql.sql"
The script itself runs 2 hours and exits via sqlplus.exe properly without any errors based on errorlevel from my batch and proper generated data. However, I have noticed that spool output file stops generating any records after 1 hour. It appears that client sqlplus.exe is sleeping or verifying something after spooling completed exactly the same period of time that takes to generate my out file. Is there a way to configure my script to avoid this 1 hour sleep/verification process?
whenever sqlerror exit sql.sqlcode
alter session set current_schema=blah;
/
set linesize 1000
set feedback off
[Code]....
I have received ORA-12842: Cursor invalidated during parallel execution error in my Pl/sql script. In pl/SQL 4MVs are used those are refreshed/refreshing while Pl/sql script start executing
Script is also dropping and creating table and index before actual processing starts.
Is that error coming because MVs are refreshing and they are not ready for use or some thing happened between actual processing and dropping/creating the table?
In my recent performance improvement tasks I was experimenting with Parallel hints. I have been getting good results with them, however the question arises "How is Parallel degree proportionate to number of CPUs used during execution?
/*+ parallel(emp_tab,8) */
Oracle Version: Oracle 10g
OS : UNIX
Client OS: Windows XP
V$PARAMETER VARIABLES as follows:
Total CPUs available: 10
No of CPUs per core: 2
Max parallel : 100
Min Parallel : 5
Question 1: So how do I map the degree of 8 with CPUs. I believe that degree of 8 does not mean its going to use 8 CPUs. If so, how do I prove it. I tried SQL_TRACE and cpu comes 0. And I believe its not the CPU count.
Question2: How do I know how many CPUs were used to execute a SQL query ?
If we have not set parallel degree for a table then we can ( try to ) force parallel execution on a table using a parallel hint Does this 'parallelism' works on the index search in the query as well?
In which situations non-parallel non-partitioned table but parallel index (degree>2) will facilitate a query?
Our client requirement is to avoid table data to physical standby database.
View 3 Replies View Relatedis there any way to refer a table which is in different schema other than using DB links.
View 5 Replies View RelatedAt the moment, we were loading the file in our system serially. This is a very old and established system.We would like to incorporate parallel loading for our loaders to load data into the database.
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The issue here is untill the first file finishes loading and commits, the second file would just hang. In fact, mulitiple files might hang for the first file to finish. what can I do to overcome this?I tried to used "lock table t1 in SHARE ROW EXCLUSIVE mode nowait". When the leading process is doing inserts, the failing process will fail with a resource busy and acquire with NOWAIT specified. We would catch this exception and redirect that batch to an error file to be reloaded at a later date.
does parallel hint in query can create bottleneck/Slowdown/crash database..??
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way where max can be avoided or a more tuned query .
create table tab1 (sapid number,
denid number);
create table tab2 (sap_pkid number ,sapid number,
denid number,
[code]...
I have a query that performs the sum of a field and divides by the number of occurrences, got me a problem because if there are no occurrences would cause a divide by zero error in Query.
The solution I found might not have been the best, but at the time was possible.
I put a Case, when the sum of the number of occurrence is zero then return zero, otherwise performs the division of the sum of the values by the number of occurrences.
SELECT CLIENT_ID,
TO_NUMBER(TO_CHAR(DTPROC, ''YYYYMM'')),
DTPROC, EXCHANG_VAL,
[Code]....
Now this query is very slow, because have CASE,SUM and GROUP BY, so I need to optimize it.
do this validation (if the divisor is zero) more performance?
select T2.name,sum(T1.area)
from (select * from country) T1,T2i wrote very simple just to show you the problem, bu i think here we should add "group by".
but is there any way to avoid group by?because i don't want to group any thing!
oracle11g
I have created a procedure which sends mail to the users by using the smtp operation. I am collecting the email id of the users and then concatenating the same using the loop.
Everything is working fine, but if some person is coming multiple times in the loop, then his/her name is shown multiple times in the CC/BCC part (Although mail is sent once), it should be restricted to one time.
what i am doing is:
I have declared id_collector and it is concetenating the email as per the condition loop
........ some code here....
id_collector:=id_collector||email_id||';';
end loop;
Now, I want to check before concatenating that email already exists or not.
Example:
suppose value of id_collector= 'abc@gmail.com;pqr@gmail.com;rst@gmail.com;xyz@gmail.com;'
and again if email id comes - 'abc@gmail.com', then it should get rejected.
I think it can be done using reg_exp but I have messed up with that.
i am facing problem with date column.when i am trying to do execute a query this works fine
select null as link,'S'||to_char(DATE_OF_JOIN,'YY'),COUNT(STUDENT) "Blue Acres" from STUDENT_RECORD where PROCESSOR=1 and DATE_OF_JOIN >= to_date('0620' || to_char(sysdate, 'YYYY'), 'MMDDYYYY') and DATE_OF_JOIN < to_date('0920' || to_char(sysdate, 'YYYY'), 'MMDDYYYY') group by to_char(DATE_OF_JOIN,'YY')
and when i am trying the below query its showing the only this year dates its not referring the previous years
select null as link,'S'||to_char(DATE_OF_JOIN,'MMDDYY'),COUNT(STUDENT) "Blue Acres" from STUDENT_RECORD where PROCESSOR=1 and DATE_OF_JOIN >= to_date('1220' || to_char(sysdate, 'YYYY')-1, 'MMDDYYYY') and DATE_OF_JOIN < to_date('0320' || to_char(sysdate, 'YYYY'), 'MMDDYYYY') group by to_char(DATE_OF_JOIN,'MMDDYY')
when i am trying below query its showng the error ORA-01843: not a valid month
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I'm creating oracle form to allow the user to register a new record in a table, I want to check the duplication in Four tables! which means, the user is able to save the record if it's NOT already registered in the other four tables.By checking P_ID (user parameter). this is my
Declare
v_count number;
begin
select count(*) into v_count ---Checking the 1st table
from 1_table
where p1_id=:p_id;
if (v_count>0) then
message ('Duplicate');
[code]....
I have a function that is being called three time using UNION and wanted to know if this can be improved to just one call while incorporating all the table joins.
select field1,fdate,fname,username,stepnum from (
SELECT M.FIELD1,
TO_CHAR (M.FIELD_DATE, 'MM/DD/YYYY HH24MISS') AS FDATE,
M.FIELDNAME AS FNAME,
M.USERNAME,
While I am inserting and updating the values in the oracle database its showing a message 'FRM-40401 - No changes to save.' I don't want this message to be shown. How can I do that?
View 5 Replies View RelatedBest solution to avoid mutating table error?
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View 8 Replies View Related must generate a Cartesian join, but I do not know why it happens. dt.debtorkey, cl.clientkey, inv.invoicekey, ag.agingkey are primary keys of each table. The problem is: I got same tuple for 8 times.
select dt.debtorkey, cl.clientkey, inv.invoicekey, ag.agingkey, dt.DebtorNo, dt.Name as "debtor Name", dt.State, cl.ClientNo, cl.Name as "Client Name", inv.InvNo, inv.PurchOrd, inv.Amt,
to_char(inv.InvDate, 'MM-DD-YY') invoice_date, to_char(ag.DateLastBuy, 'MM-DD-YY') aging_lastbuy, to_char(ag.DateLastPmt, 'MM-DD-YY') aging_lastpmt
[code]...
How can i avoid duplicate entry at entry level in form rather than when i pressed save button
View 2 Replies View RelatedBelow query is getting delayed becasue of BitMap Indexes on the table. I am trying to avoid indexes by using Hints in the query but unable to do so, Details are as follows.
explain plan for
SELECT cbu_cid, cbu_cid_customer_en_nm,
COUNT (billg_acct_no) AS billg_acct_no,
SUM (subscriber_cnt) AS subscriber_cnt
FROM daily_view
WHERE (billg_system_id = 'TM' AND mktg_sub_segment_a_nm = 'TM')
AND (cbu_cid NOT IN ('0001988048', '0001379962', '0001350469'))
GROUP BY cbu_cid, cbu_cid_customer_en_nm
HAVING SUM (subscriber_cnt) > 10
ORDER BY subscriber_cnt DESC;
[code]....
I have tried with ALL_ROWS & PARALLEL.how to avoid above two indexes in a query.
I have one table in which I want to restrict some records from being inserted. I don't want to put any checked constraints. e.g. consider following table
transaction(
id number primary key,
txn_date timestamp(7),
payee varchar2(40),
amount number,
memo varchar2(40),
ref_num number
)
I want to write SQL which should not inset duplicate record.
e.g.
I have written one as bellow:
insert into transaction
select 1, to_date('2009-12-12','YYYY-MM-DD'), 'Payee1', 12, 'Test', 212 from dual where
(select count(*) from transaction where txn_date=to_date('2009-12-12','YYYY-MM-DD') and
payee='Payee1' and amount=12)=0;
Can I use exists/not exists, which query will be more appropriate. (Please consider that fields which I am using to filter out the duplicate transactions does not contain primary key.)
Can I write such SQL. Or do i check for duplicate rows one by one and then filter the duplicate records.
I have index on column column1 and because of the nvl, the optimizer is not picking up the index
How can I restructure the query to avoid nvl giving same result using index on column1?
now column1 and column2 are varchar2 fields here
where nvl(column1,'*')=(nvl(:param1,nvl(column2,'*'))
can I use case statement like
case when column>'' then .. stuckup here
how to avoid blocking locks.
View 27 Replies View Relatedam trying to add a validation in Oracle forms using Oracle DB.in a Oracle table consider there is a record named 'Netbook' then if I try to create another record with name 'Netbooks', then a Oracle warning message should be displayed stating similar name 'Netbook' is already available. same way, if NETBOOKS is already available in table and if user try to create another record NETBOOK then same warning message netbooks is already available should be shown.
View 17 Replies View Relatedis there any possibility or hint to avoid updating record if columns do not change? For example, I have UPDATE:
UPDATE MY_TABLE SET COLUMN_A = 'ABC' WHERE COLUMN_B = 12
if the value in COLUMN_A is 'ABC' I do not want to do this update. Of course I can add in WHERE 'AND COLUMN_A<>'ABC' but when I am updating a lot of columns it will be annoying
