Just a general query on parallel query. My customer having 4 cpus and running the database in 11.2.0.3 in AIX 5.3(One is in AIX 6.1). Under which circumstances, we can propose to user parallel query options.
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oracle: 10.2.0.5.7...I can get this to work, but not the way the docs seem to say. I am wondering if I am reading the docs wrong or missing something.
The docs seem to say to get a query to run in parallel using an index you use the PARALLEL_INDEX hint. This doesn't seem to work for me. I have to do one of the following
1. change the parallel degree with an alter index, then use the PARALLEL hint (parallel index hint does nothing in this case)
2. use both the parallel_index and parallel hint
We have very large table having data more than 1000 millions rows. We divide this table into four physical tables say A, B, C and D. The physical horizontal partition of data of this original table is done based upon their business policy.
Each partitioned table has contained data of particular business entity. Further each table has partition and sub partitions based upon business rule.
We have to retrieve data from all these tables as follows:
select a1, a2, a3, a4, a5, a6
from A
where < logical filter condition>
union all
select b1, b2, b3, b4, b5, b6
[code].....
We observed that above each query block execute in serial one after another and individual each query block capable to process data in parallel from respective table.
How does this above query able to execute each query block in parallel?
I have been told that i should use multiple's of 4 as degree in the parallel hint to get maximum performance, so i am wondering is it true? that i should always use multiples of 4 or i can use any number inside the parallel hint.
View 4 Replies View RelatedBelow query doesn't have any parallel hints. Though, it is without where clause, so full scan is must but why "PX Deq Credit: send blkd" occurred?
SELECT ROWID, REGION, STATE, CITY, DEALERNAME, DEALERCODE, DEALERID, BUSINESSUNIT, GARDEALERID, MASTERCLAIMNUMBER, CLAIMNUMBER, COMPANY, POLICYNUMBER, STARTDATE, ENDDATE, POLICYISSUEDEALERNAME, ISSUEDEALERCODE, CUSTOMERNAME, CUSTOMERADDRESS, ACCIDENTDATE, ACCIDENTTIME, INTIMATIONDATE, INTIMATIONTIME, REGISTRATIONDATE, REGISTRATIONTIME, DRIVERNAME, ACCIDENT_DESCRIPTION, INTIMATION_DELAY_REASON, INTIMATORNAME, INTIMATORMOBILENO, CLAIM_INTIMATED_BY, TOWING_ASSISTANCE, ACCIDENTPLACE, ACCIDENTLOCATION, GARAGENAME, WORKSHOPADDRESS, WORKSHOPMOBILENO, MANUFACTURINGYEAR, CHASSISNUMBER, ENGINENUMBER, REGISTRATIONNUMBER, VEHICLEMODEL, BUSINESSTYPE, TOTALSI, CLAIMEDAMOUNT, ESTIMATEDAMOUNT, "LABOUR(E)", "PARTS(E)", "PAINTING(E)", EXCESS,
[code]....
understand about "PX Deq Credit: send blkd"..
We are facing the below error in our Production environment.
ORA-12827: insufficient parallel query slaves available
While executing parallel query we are getting the below errors.
(SQLState = HY010) - java.sql.SQLException: [tibcosoftwareinc][Oracle JDBC Driver][Oracle]ORA-01002: fetch out of sequence"
(SQLState = HY000) - java.sql.SQLException: [tibcosoftwareinc][Oracle JDBC Driver][Oracle]ORA-12842: Cursor invalidated during parallel execution
Database Version: Release 11.2.0.1.0 (Non-RAC)
SQL Query:
SELECT /*+ PARALLEL 4 */
DISTINCT
AI.STORE_ID STORE_ID, AI.DUE_DATE DUE_DATE, AI.INSTRUCTION_ID INSTRUCTION_ID,
DECODE (ASR.ADT_INSTR_KEY, NULL, 'F', ASR.ADT_INSTR_KEY, 'S') QCCHECK
FROM NSOAPP.DA_INSTRUCTION_INFO AI,
[code]....
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?
ORA-12805: parallel query server died unexpectedly
View 4 Replies View Relatedcreating Oracle SQL query to fetch the information using PIVOT option.We are populating audit table using triggers. For every update, there will be two rows into audit table, one row with all OLD values and another with all NEW values. Also every updated is uniquely identified by Sequence No. Example for phone audit is mentioned below :
CREATE TABLE test_audit_phone
(
emplid VARCHAR2(10),
seqno NUMBER,
action VARCHAR2(3),
office NUMBER,
mobile NUMBER
);
Insert some rows into table.
INSERT INTO test_audit_phone VALUES ('100',1,'OLD',1111,9999)
/
INSERT INTO test_audit_phone VALUES ('100',1,'NEW',2222,9999)
/
INSERT INTO test_audit_phone VALUES ('100',2,'OLD',2222,9999)
/
INSERT INTO test_audit_phone VALUES ('100',2,'NEW',2222,8888)
/
Table will look like the following :
SQL> SELECT * FROM sysadm.test_audit_phone ;
EMPLID SEQNO ACT OFFICE MOBILE
---------- ---------- --- ---------- ----------
100 1 OLD 1111 9999
100 1 NEW 2222 9999
100 2 OLD 2222 9999
100 2 NEW 2222 8888
Now we have to present data in different format. For each field, display OLD and NEW values in column format.
EMPLIDFIELDOLDNEW
----- ------ ---- -----
100OFFICE11112222
100MOBILE99998888
Challenges :
1) Make pivoting with old and new values
2) For each field we have to show old and new values
3)if old and new values are same, dont show in report.
We are importing data from one DB to other.Schema contains 200 tables and each table contains 1million rows. We are using query option to subset the data using different conditions instead of loading full table data .
We want to subset from different tables. But query option in expdp only taking 1800 characters only. why it is taking upto 1800 characters only. Any restriction imposed on query option.how to increase query clause length?
below is the example of export command.
otispa/********@otisua1 schemas=tbaadm directory=PA_OTIS_DIR dumpfile=tbaadm
data.dmp CONTENT=all tableexists_action=replace query='tbaadm.ACCOUNT_LIEN_HISTORY_TABLE:"where ACID in(select FINACLE_INT_BNK_ACC
T_ID from INIT_ACCT_LD)"','tbaadm.DISCRET_ADVN_TABLE:"where ACID in(select FINACLE_INT_BNK_ACCT_ID from INIT_ACCT_LD)"','tbaadm.TEMP
DISCRETADVN_TABLE:"where ACID in(select FINACLE_INT_BNK_ACCT_ID from INIT_ACCT_LD)"','tbaadm.PYMNT_RCPT_DET_TABLE:"where ACID in(s*
*elect FINACLE_INT_BNK_ACCT_ID from INIT_ACCT_LD)"','tbaadm.STOP_PAYMENT_ADDTNL_TABLE:"where ACID in(select FINACLE_INT_BNK_ACCT_ID f*
*rom INIT_ACCT_LD)"','tbaadm.STOP_PAYMENT_REG_TABLE:"where ACID in(select FINACLE_INT_BNK_ACCT_ID from INIT_ACCT_LD)"','tbaadm.GEN_AC*
[code].....
how to write the query option in expdp ....in expdp by using query option...
where columnname between '05-May-12 02:57:00.000 AM' and '6-May-12 02:59:59.999 AM';
select
serialnumber from product where productid in
(select /*+ full parallel(producttask 16) */productid from producttask where
startedtimestamp > to_date('2013-07-04 00:00:00', 'YYYY-MM-DD HH24:MI:SS')
and startedtimestamp < to_date('2013-07-05 00:00:00', 'YYYY-MM-DD HH24:MI:SS')
and producttasktypeid in
[code]....
Explain plan output:
Plan hash value: 2779236890
-----------------------------------------------------------------------------------------------------------------------------------------
| Id | Operation | Name| Rows| Bytes | Cost (%CPU)| Time| Pstart| Pstop |
-----------------------------------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT || 1 | 29 | 9633M (8)|999:59:59 |||
|* 1 | FILTER |||| ||||
| 2 | PARTITION RANGE ALL || 738M| 19G| 6321K (1)| 21:04:17 | 1 | 6821 |
[code]....
Predicate Information (identified by operation id):
---------------------------------------------------
1 - filter( EXISTS (<not feasible>)
4 - filter("PRODUCTID"=:B1)
5 - filter(ROWNUM<100)
12 - access("MODELID"=:B1)
[code]....
Note: - SQL profile "SYS_SQLPROF_014153616b850002" used for this statement
I want to create a materialized view for the last 10 days with the enable query rewrite option.
e.g. i want to create a view with the list of employees who joined the company in the last 10 days.
create materialized view M_Employee
refresh fast on commit
enable query rewrite as
select joining_date , name
from
employee
where joining_datde < TRUNC(sysdate) - 10
I seem to get the error SQL Error: ORA-30353: expression not supported for query rewrite
30353. 00000 - "expression not supported for query rewrite"
*Cause: The select clause referenced UID, USER, ROWNUM, SYSDATE.
This error is self explanatory , but is there any work around to have a query liek this to list the employees based on sysdate.
does parallel hint in query can create bottleneck/Slowdown/crash database..??
View 4 Replies View Relatedexport a subset of the data only from one database to another. Both on AIX.
Source/testdatabase 11.2.0.3 (non-partitioned tables)
Target productiion database 11.2.0.3 (partioned tables)
Tables same column names but diffrenet index structures and traget one to be partitioned hence only want to import the content Each table on source datbaase hascolumn seq number and only want to extract the last few months of data.
TABLES:table1,table2...
DUMPFILE=dump_dir
CONTENT=data_only
QUERY= table1:"WHERE seq_num >100 "want to use expdp but not sure about how to ensure all tables have the WHERE seq_num >100 condition, if leave table1: out and just have
QUERY= "WHERE seq_num >100 " will this condition be applied to all tables which is what we want.
I'm assuming also can use impdp CONTENT=data_only?
I have a query which has 5 unions, each clause of the union takes 1 hr to run and query results come back in 5 hrs, Is there any way I can make these clause to run in parallel?
View 13 Replies View Relatedwe have many tables in Cursor For Loop :
CREATE OR REPLACE PROCEDURE EBILL_BULK_UPDATE_SERVICE(in_cycle VARCHAR2)
AS
v_cnt NUMBER; -----Variable used for checking table is partitioned or not partitioned
CURSOR cur_update -----Cursor defined for Updating EBILL tables for service_id
is
SELECT table_name
, cycle_name
FROM NNP_EBILL_UPDATE
[code]....
As our requirement that Execute Immediate should work for 5 or more tables updation parallely at a time.If one table get completed then it should take next table from loop and then start the code till completion of all tables.
On a tab page should be displayed the result of four indifferent queries, each based on a stored procedure.At the moment, the queries are processed serially, by the statements:
GO_BLOCK('one');
CLEAR_BLOCK(No_Validate);
EXECUTE_QUERY;
GO_BLOCK('two');
CLEAR_BLOCK(No_Validate);
EXECUTE_QUERY;
Is there a way to processes the queries parallel ?
Is it possible to run a single procedure in parallel. (Not looking for multifple, using DBMS_JOB)
I am using Oracle 9i.
I have to truncate two partitions from the same table parallelly at a time.
ALTER TABLE tablename TRUNCATE PARTITION partitioname1;
ALTER TABLE tablename TRUNCATE PARTITION partitioname2;
Huge data is present in each partition.is this possible, means it does not lock table for another alter truncate partition statement?
I am inserting 50 million records into a table MAIL_LOG. I am using the hint /*+ append parallel (MAIL_LOG, 12) */. But for my table degree is 1.
SELECT table_name, degree
FROM user_tables
WHERE table_name = 'MAIL_LOG';
I have following clarifications.
1) What degree I should use.
2) On what basis I have to give the degree.
3) Have we use constant degree all the times.
4) How to check my insert statement is using parallel degree.
5) How to find the degree at session level.
i am trying to export table using datapump in oracle 10g, this expdp takes 5 hours time, so i want use use parallel keyword in expdp,
my question is how should i know number of parallels can i use...?
I have total 8 procedure to run in parallel . and after that my 9th procedure should run.
below is my job submission procedure
create or replace procedure DURATION_ALARM_WEEKLY as
l_job number ;
begin
dbms_job.submit(l_job,'begin ALARMS_WEEKLY_CALL_OUT ; end;');
dbms_job.submit(l_job,'begin ALARMS_WEEKLY_CALL_IN ; end;');
dbms_job.submit(l_job,'begin ALARMS_WEEKLY_DURATIN_OUT ; end;');
[code].......
what is the syntax I have to do in my FINALE procedure . using DBMS_ALERT.REGISTER , DBMS_ALERT.WAITANY .....?
I want browse option in oracle forms.
View 3 Replies View RelatedWhat is the Best option for SQL/sybase server Temp table to use/for data manipulation (Insert/update/delete) inside the procedure in oracle Other then global temporary table.
Since we are porting from SQL/Sybase to Oracle we don't want to Create too many global temporary table.
Imagine I have the following scenario:
CREATE TABLE AAA_PLACE
(COD_PLACE NUMBER,
PLACE_NAME VARCHAR2(50 BYTE)
)
insert into AAA_PLACE (COD_PLACE, PLACE_NAME) values (1, 'Munich');
insert into AAA_PLACE (COD_PLACE, PLACE_NAME) values (2, 'Lisbon');
insert into AAA_PLACE (COD_PLACE, PLACE_NAME) values (3, 'Monaco');
insert into AAA_PLACE (COD_PLACE, PLACE_NAME) values (4, 'Madrid');
insert into AAA_PLACE (COD_PLACE, PLACE_NAME) values (5, 'Milan');
Imagine I want to retrieve those records in only 3 distinct rows, like this:
Munich
Madrid
Others
Is there any way I can do this with an simple Statement?
in many shopping cart applications they are providing multiple filter option.
suppose filter by brand,fitler by price ranges,filter by color,filter by shape etc..
so how they are achieving the performance.because lot of filter if applied then it should get slow execution.
how to achieve this.I tried as follows.
alter session set nls_date_format = 'dd-MON-yy';
CREATE OR replace PROCEDURE Multiple_filter (p_empno VARCHAR2,
p_ename VARCHAR2,
p_from_hiredate DATE,
p_to_hiredate DATE)
[Code]....
i already created metalized view
now i want to set MV as incremental refresh option?
is it possible to set this attribute after mv created..?
I am using 11.2.0.2 database.
I got ORA-14074 error says that if you have a MAXVALUE already you will need to either drop the partition that encompasses the MAXVALUE or split partition.So I want to use split partition option through the below statement,
alter table
tablename
split partition
partmax at (XXX)
into
(partition partXXX, partition partmax);
I am concerned about the existing data in the table will it by any change gets deleted, and what about indexes, do I have to rebuild, etc.I have to do this on produciton. I cannot test this as I don't have a test environment and moreover the table is having 70 million records and we don't have time/hardware resources to recreate this by export import in another database.
