ROWID

Hello, we are development an java application (jsp). We are using hibernate and Oracle 10G. Today, we are not use of partitioned table, but the next year we must partition some tables.
We are thinking of the use of rowid. We have tables with 4 or 5 fields for the primary key, and we want use of rowid for select some rows, but we don't know if there are any problem with it. We read that the value of rowid can change with partitioned tables. We don't store the rowid, we always read these value (rowid), and with this value, we select another values of another tables.
There are any problems for the use of rowis??
PD: Excuseme but my english is very bad (I'm spanish)
Thanks you in advanced.

Instead of asking what will be the impact of rowid if you decide to partition your tables, ask first yourself
(a) what are you expecting from partitioning?
Do you want to improve performance? or to archive old data using exchange paritition?
or you expect easy managability ?
Those are the fundamentals questions you must answer before starting paritioning your tables. Bear in mind that a wrong partitioning (wrong choose of partition key for example) might bring your database to perform dramatically slow even if you use correclty the rowid your questioning about
Regards
Mohamed Houri

Similar Messages

Which one faster- With Rowid or PK

Hi,
Recently came across the concepts of IOT(Index organised table). It was mentioned that
You must specify a primary key for an index-organized table, because the primary key uniquely identifies a row. Use the primary key instead of the Rowid for directly
accessing index-organized rows. "
This surprised me as till date I was assuming that the fastest way to access the data from a table is by Rowid. Isn't this contadicting then?
Can the experts clarify more on these conceps related to IOT.
Rgds,
Aashish

what is the diff betn a Normal table with PK on some column and IOT with almost
the same structure?The difference is whatever is implied by that "almost".
Look, the purpose of index organized tables is to do away with a nugatory object when a table and and its primary key index - have basically the same structure. The classic example is the code lookup table, where the difference between the table's columns (code, code_descr) and its primary key (code) is a single column (code_descr). Nearly access of that table is going to be an indexed read on code to get the description. That usage makes it a good candidate for being an IOT.
Mere creation of PK on a column would give the same result.No. An index organized table is similar to creating an index on (code, code_descr) but without the need to maintain two sets of data. Furthermore the IOT allows us to include non-primary key columns without compromising our relational integrity.
Cheers, APC
Blog : http://radiofreetooting.blogspot.com/

Get ROWIDs from Interactive Report

Hi,
I'm using an interactive report but I'd like to use the rows returned in a process so is it possible to get the rowsids that have been selected and make up the filtered report
Thanks Andy

A little trial and error using Andy ATD's suggestions gave me the following query, which I can use to recreate the selected ROWIDs:
SELECT /*c.interactive_report_id, report_id, application_user, report_name, */
CONDITION_COLUMN_NAME as col_name, CONDITION_OPERATOR as col_operator,
CONDITION_EXPRESSION as exp1, CONDITION_EXPRESSION2 as exp2,
CONDITION_ENABLED AS enabled,
LAST_UPDATED_ON as date_mod
FROM APEX_APPLICATION_PAGE_IR_COND C
WHERE c.application_id = :APP_ID
AND c.page_id = :APP_PAGE_ID
AND c.condition_type = 'Filter'
AND application_user = :APP_USER
AND condition_enabled = 'Yes'
and report_name is null -- Just show current working report
AND trunc(last_updated_on) = trunc(sysdate)
ORDER BY last_updated_on desc, report_id;
This gives results like:
COL_NAME     COL_OPERATOR     EXP1     EXP2     ENABLED     DATE_MOD
ASK_AMOUNT_CURRENT     between     2500     10000     Yes     03-DEC-08
PREF_CLASS_YEAR     =     1968     -      Yes     03-DEC-08
- Stew

Does the 'default where clause' query select the ROWID by default ?

Hi ,
The query in default where property of a data block is as follows:
global.prim_lang = :global.user_lang
and upper(group_name) like upper('%' || :B_apply_inclusions.TI_group_desc || '%')
UNION ALL
select g.rowid, g.group_no
from table1 t,
table 2 g
where :global.prim_lang != :global.user_lang
and upper(g.group_name) = t.key(+)
and :global.user_lang = t.lang(+)
and upper(nvl(t.translated_value, g.group_name)) like upper('%' || :B_apply_inclusions.TI_group_desc || '%')
The g.rowid was added in the UNIONALL portion of the query because the first part of the query was bringing rowid as well.
We are in 10.1.2.3.0 forms version.
However for a user in forms verion 10.1.2.0.2, the query is giving an error " Unable to perform query " - due to mismatch in the number of columns selected in the query union.
because for this user, rowid is not selected as part of default where clause query( 1st part of the query before the unionalll).
If g.rowid is removed from the 2nd part of the query , it errors out in 10.1.2.3.0 forms version.
Could you kindly clarify when this rowid will also be selected by the default where clause of a block and why this issue is occuring?Is this issue related to forms version or any other property of the block? Is it is version based, is there a patch available to deal with the same?
Thanks in Advance.

You normally change the default_where block property just when you want to chnage the filter conditions for what is selected from a given block data source.
Querries with union or minus will confuse forms as to the rowid and will no longer be albe to perform the default insert/update/delete, not knowing the rowid and the table to perform the dml on.
A from clause query will be the best way to change dynamically the tables you select from and also the where. But, by using that, if you wish to insert/update/delete, you will have to use on-insert/update/delete triggers where the processing will have to rely on some primary key columns and not on rowid.
Or, instead of a from-clause, you may use a view, but that will definitely be less flexible than a from clause query.

ORA-12032: cannot use rowid column

Hi,
on 8.1.7 I have the following error :
ORA-12032: cannot use rowid column from materialized view log on "string"."string"
The solution is :
Action: A complete refresh is required before the next fast refresh. Add ROWID columns to the materialized view log, if required.
How can I do a complete refresh before the next fast refresh or Add ROWID columns ? How to know if Add ROWID columns is required ?
Thank you.
PS :
my script is :
START WITH TO_DATE('06-jul-2010 17:57:48','dd-mon-yyyy hh24:mi:ss')
NEXT SYSDATE+1/24

user522961 wrote:
Hi,
on 8.1.7 I have the following error :
ORA-12032: cannot use rowid column from materialized view log on "string"."string"
The solution is :
Action: A complete refresh is required before the next fast refresh. Add ROWID columns to the materialized view log, if required.
How can I do a complete refresh before the next fast refresh or Add ROWID columns ? How to know if Add ROWID columns is required ?
Thank you.run above
EXECUTE DBMS_MVIEW.REFRESH('MV_NAME','C');

Tabular form on a view :ORA-01446: cannot select ROWID from, or sample...

Hi,
I have two tables
CUSTOMERS
===========
Name Null Type
======================
CUST_UID NOT NULL NUMBER(4)
CUST_NAME VARCHAR2(50)
ITEM_PRICES
===========
Name Null Type
======================
IP_UID NOT NULL NUMBER(4)
IP_ITEM_DESC VARCHAR2(50
IP_COST_PRICE NUMBER(6,2)
IP_SELL_PRICE NUMBER(6,2)
I have a view IPS_VW which is the cartician product of CUSTOMERS and ITEM_PRICES, and an instead of trigger for UPDATE on this view which either inserts or updates data in the following third table
ITEM_PRICES_SPECIAL
===========
Name Null Type
======================
IPS_UID NOT NULL NUMBER(4)
CUST_UID NUMBER(4)
IP_UID NUMBER(4)
IPS_SELL_PRICE NUMBER(6,2)
The following is my view
SELECT 'A'||ROWNUM AS "IPSVW_UID",
0 AS "IPSVW_IPS_UID",
"CUSTOMERS"."CUST_UID" AS "IPSVW_CUST_UID",
"ITEM_PRICES"."IP_UID" AS "IPSVW_IP_UID",
"ITEM_PRICES"."IP_SELL_PRICE" AS "IPSVW_IPS_SELL_PRICE"
FROM "CUSTOMERS" "CUSTOMERS",
"ITEM_PRICES" "ITEM_PRICES"
WHERE NOT EXISTS
(SELECT 1
FROM "ITEM_PRICES_SPECIAL" "ITEM_PRICES_SPECIAL"
WHERE "ITEM_PRICES_SPECIAL"."IP_UID" ="ITEM_PRICES"."IP_UID"
AND "ITEM_PRICES_SPECIAL"."CUST_UID" ="CUSTOMERS"."CUST_UID"
UNION
SELECT 'B' ||ROWNUM AS "IPSVW_UID",
"ITEM_PRICES_SPECIAL"."IPS_UID" AS "IPSVW_IPS_UID",
"ITEM_PRICES_SPECIAL"."CUST_UID" AS "IPSVW_CUST_UID",
"ITEM_PRICES_SPECIAL"."IP_UID" AS "IPSVW_IP_UID",
"ITEM_PRICES_SPECIAL"."IPS_SELL_PRICE" AS "IPSVW_IPS_SELL_PRICE"
FROM "ITEM_PRICES_SPECIAL" "ITEM_PRICES_SPECIAL";
And this is the instead of trigger
CREATE OR REPLACE TRIGGER "TRG_IPSVW_UPDATE" INSTEAD OF
UPDATE ON IPS_VW REFERENCING NEW AS N FOR EACH ROW
BEGIN
IF :N.IPSVW_IPS_UID = 0 THEN
INSERT INTO ITEM_PRICES_SPECIAL
( CUST_UID, IP_UID,IPS_SELL_PRICE )
VALUES
( :N.IPSVW_CUST_UID,:N.IPSVW_IP_UID, :N.IPSVW_IPS_SELL_PRICE );
ELSE
UPDATE ITEM_PRICES_SPECIAL
SET IPS_SELL_PRICE = :N.IPSVW_IPS_SELL_PRICE
WHERE IPS_UID = :N.IPSVW_IPS_UID;
END IF;
END;
Everything works fine in SQLPLUS, if i update a rate in this view, a record is either inserted or updated in the third table.
But when i try to create a tabular form based on this view, i get the error
ORA-01446: cannot select ROWID from, or sample, a view with DISTINCT, GROUP BY, etc.
Could someone help me please?
Thanks,
Allen

I think The tabular form needs to be able to identify some primary key and using a rownum concatenation cannot provide that.
Cheers
Kofi

How to get the RowID in a VO

Hi All,
I have a expert mode VO. Its not a EO based VO. I need the row id in the VO query. But it throws me an ora-01445 error. I need the rowid because I need to pass it as a parameter to a procedure. How can i get this done. Any help is greatly appreciated.
Thanks,
Sreeram.

HI,
This is my sql query in the VO I am trying to develop:
SELECT * from (SELECT aid.rowid,
aid. ACCOUNTING_DATE,
aid. DISTRIBUTION_LINE_NUMBER,
aid. INVOICE_ID,
aid. ACCRUAL_POSTED_FLAG,
aid. ASSETS_ADDITION_FLAG,
aid. ASSETS_TRACKING_FLAG,
aid. CASH_POSTED_FLAG,
aid. DIST_CODE_COMBINATION_ID,
aid. LAST_UPDATED_BY,
aid. LAST_UPDATE_DATE,
aid. LINE_TYPE_LOOKUP_CODE,
aid. PERIOD_NAME,
aid. SET_OF_BOOKS_ID,
aid. INVOICE_DISTRIBUTION_ID,
aid. AMOUNT,
g.code_combination_id,
g.segment1,
g.segment2,
g.segment3,
g.segment4,
g.segment5,
g.segment6,
ppa.segment1 as Project,
pt.task_number as TASK,
aid.expenditure_type,
aid.expenditure_item_date,
hao.name as name
FROM AP.AP_INVOICE_DISTRIBUTIONS_ALL aid,
GL.GL_CODE_COMBINATIONS g,PA.pa_projects_all ppa, PA.pa_tasks pt, apps.hr_all_organization_units_tl hao
WHERE aid. invoice_id = 19498
AND LINE_TYPE_LOOKUP_CODE in ('ITEM')
AND aid. DIST_CODE_COMBINATION_ID =g.code_combination_id
AND aid.project_id = ppa.project_id(+)
AND aid.task_id = pt.task_id (+)
AND aid.expenditure_organization_id = hao.organization_id (+)) QRSLT where 1=2
But it gives me this error:
SQL QUERY ERROR MESSAGE:ORA-01445 Cannot select rowid from, or sample a join view with out a key-preserved table.
Btw..this is a custom application.
Any pointers on this..
Thanks,
Sreeram.
Edited by: SreeramKosaraju on Jun 29, 2009 9:58 AM

How to get the ROWID in a Trigger?

On Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit when I try below script I always get the same Rowid as "AAAAAAAAAAAAAAAAAA". Is this normal?
Thank you.
create table testrowid (a number );
create or replace trigger testrowidbins
before insert on testrowid for each row
begin
dbms_output.put_line( 'Rowid:= ' || :new.rowid );
end;
set serveroutput on
insert into testrowid values( 1 );
insert into testrowid values( 2 );
insert into testrowid values( 3 );
rollback ;
insert into testrowid values( 1 );
insert into testrowid values( 2 );
insert into testrowid values( 3 );
commit ;
insert into testrowid values( 1 );
insert into testrowid values( 2 );
insert into testrowid values( 3 );
rollback ;

Well, it was more of a rhetorical question.
Rowid is the physical location of a row in a table. During the execution of a BEFORE trigger, the row has not yet been placed in the table hence the 'AAAAA' rowid.
During your AFTER trigger, the row exists in the table and therefore has a normal rowid.

Using RowID to get the first instance of a value in a table

I have a table of the structure
SECURITY(
COMPANY_ID NUMBER,
SECURITY_ID NUMBER,
CUSIP
One company can have many CUSIPs asociated with it and I want to find the best way to find any valid CUSIP for the company_id using PL/SQL.
Here is my approach, I would like any other suggestions or comments.
SELECT
rowid INTO v_row_id
FROM
SECURITY
where COMPANY_ID=v_company_id
and rownum<2
SELECT
CUSIP INTO v_cusip
FROM
SECURITY
where rowid=v_row_id

Hello
If you don't specify an order you will let oracle decide what the "first" row is. It may be the first row that was inserted, it could be the last, or it could be any other row for that company. If the execution plan for the query changes (or a number of other things) the first row returned could change. This may of course not matter to you at all but it's worth pointing out I think:
create table dt_test_SECURITY(
COMPANY_ID NUMBER,
SECURITY_ID NUMBER,
CUSIP varchar2(20)
--generate some test data
SQL> insert into dt_test_security select mod(rownum,200)+1,mod(rownum,10)+1,to_char(rownum) from dba_objects where rownum <2001;
2000 rows created.
SQL>
SQL> SELECT
2     CUSIP
3 FROM
4     dt_test_SECURITY
5 where
6     COMPANY_ID=1;
CUSIP
2000
200
400
600
800
1000
1200
1400
1600
1800
10 rows selected.
SQL> SELECT
2     CUSIP
3 FROM
4     dt_test_SECURITY
5 where
6     COMPANY_ID=1
7 and
8     rownum<2;
CUSIP
2000
create index dt_test_security_idx2 on dt_test_security(company_id,cusip);
exec dbms_stats.gather_table_stats(ownname=>user,tabname=>'DT_TEST_SECURITY',method_opt=>'FOR TABLE FOR ALL INDEXES FOR ALL INDEXED COLUMNS');
SQL> SELECT
2     CUSIP
3 FROM
4     dt_test_SECURITY
5 where
6     COMPANY_ID=1;
CUSIP
1000
1200
1400
1600
1800
200
2000
400
600
800
SQL> SELECT
2     CUSIP
3 FROM
4     dt_test_SECURITY
5 where
6     COMPANY_ID=1
7 and
8     rownum<2;
CUSIP
1000If you use MAX(cusip), you will get the highest cusip against the company which is much more specific. Is that what you want? How are you intend to determin which is the first row, or doesn't it matter?
HTH
David

What's the impact of rowid materialized view in oracle 10g

Hello to all ;
Oracle official docs saying
ROWID materialized views should be used only for materialized views based on master tables from an Oracle7 database, and should not be used from Oracle8 or higher.
For 10g or higher versions can we consider rowid materizlized view ?
product 10.2.0.4 and 11g r2 on Redhat 5.1

No
should not be used from Oracle8 or higher10g is higher

Using ROWID in the WHERE clause of a SELECT statement

hi all,
my team is trying to select a value from a table using the rowid as the selection criterion
e.g. select column_name from table_name where rowid > 'AAA112BBBCCC12A'
this query does not appear to return accurate results e.g. it return rows instead of two. my questions are:
1. is this a legitimate approach?
2. should we convert the row id to varchar2? if so how should this be done?
thanks!

SQL> select rowid,ename
2 from emp;
ROWID ENAME
AAAs8KAA+AAAVXCAAA KING
AAAs8KAA+AAAVXCAAB BLAKE
AAAs8KAA+AAAVXCAAC CLARK
AAAs8KAA+AAAVXCAAD JONES
AAAs8KAA+AAAVXCAAE SCOTT
AAAs8KAA+AAAVXCAAF FORD
AAAs8KAA+AAAVXCAAG SMITH
AAAs8KAA+AAAVXCAAH ALLEN
AAAs8KAA+AAAVXCAAI WARD
AAAs8KAA+AAAVXCAAJ MARTIN
AAAs8KAA+AAAVXCAAK TURNER
AAAs8KAA+AAAVXCAAL ADAMS
AAAs8KAA+AAAVXCAAM JAMES
AAAs8KAA+AAAVXCAAN MILLER
AAAs8KAA+AAAVXCAAO erwer
15 rows selected.
SQL> select ename from emp where rowid = 'AAAs8KAA+AAAVXCAAH';
ENAME
ALLEN
SQL> select ename from emp where rowid > 'AAAs8KAA+AAAVXCAAH';
ENAME
WARD
MARTIN
TURNER
ADAMS
JAMES
MILLER
erwer
7 rows selected.1) using rowid to access a record is the quickest way so it is legitimate
however using > has no real purpose as you point out you cannot get any meaningful results returned.
2) No real need to convert however beware storing values in tables as Oracle does not guarantee to preserve the format in different versions so upgrading from 9i to 10g would invalidate your data.

What causes "ORA-01445: cannot select ROWID from" error

While executing a SELECT query i got this error:
ORA-01445: cannot select ROWID from, or sample, a join view without a
key-preserved table
Below mentioned is the join condition part of the query. The line which the error has occured is italicized
from checkout_hdtl ch
inner join pmt_htl ph on ph.post_ln_a = ch.post_ln_code
inner join pin_dls pd on pd.post_ln_a = ph.post_ln_code
inner join carton_dtl cd on cd.carton_nbr = ch.carton_nbr
and cd.lseq_nbr = pd.lseq_nbr
inner join invoice_module im on cd.invevt_code = im.inv_code
inner join item_dock_master del on nm.invent_code = iwm.inv_code
left outer join inv_curr_comm_code mnb on ium.invent_code = im.inv_code
and icc.cntry = ph.shipto_cntry
left outer join vw_ver_master vw on vw.del_rec = ch.del_rec
left outer join cmd code_entry on code_pi.cntry =
cd.code_entry where ch.shpmt_nbr = '3'
What do i do?

I would rather use Notepad than store my data in SQL server. It just so happens that our product is released for SQL Server as well. Hence i did the testing.
>Is there a limit to the number of joins that can be performed in Oracle?
Wrong question as it does not have anything to do with the number of views.. it has everything to do with the ability to correctly identify the unique row. Re-read the error message details posted by Blu - it explains the error.As you can see from my post, i created a table using the(CTAS) SELECT query from the View vw_ver_master's definition. So the view's result set is now stored in a table and now there are only tables involved in these JOINS.
The query will succeed if i comment out ANY one of these JOINS in this statement. This is so weird.
I

Invalid rowid error while running the snapshot agent in transactional replication

Hi All,
I am getting an Invalid rowid error while replicating an large tables i.e around 30 millions rows from oracle(publisher) to sql server(Subscriber) while running the snapshot agent in transactional replication.
Its taking around 18 hours and its then its throwing this error.
Is there any faster way that i can replicate the initial snapshot this large table as 18 hours is very high on time.
Kindly suggest.i am always got quick and accurate response always..hope the same in this case also.
Thanks,

Hi,
Could you please create a replication with some small tables for a test?
You can disable the firewall on both sides and rerun snapshot. Enable verbose logging to level 4 for snapshot agent and check the results if it fails.
http://support.microsoft.com/kb/312292
Here is a document says for the error: ORA-10632: Invalid rowid Cause: Segment Highwatermark was overwritten due to shrink and space reused Action: Reissue this command.
I also suggest you contact the Oracle support team for further help.
Thanks.
Tracy Cai
TechNet Community Support

Is this a bug? master rowid value lost when saving on a master/detail form

master/detail forms seem to lose the rowid after saving, if the unique identifier is set to ROWID
to reproduce the problem:
1) create a master detail form on DEPT/EMP
-- choose 'Managed by Database (ROWID)' on the 'Define Primary Key' page.
-- do not include master row navigation (but i don't think this matters)
-- choose 'Edit detail as tabular form on same page' on the 'Choose Layout' page
-- include the master report
2) on the master/detail page, change the conditional branch that returns to the master report page
-- the normal condition for this branch is request in SAVE,DELETE,CREATE
-- change it to request in DELETE,CREATE
3) run the form and save a change
-- saves fine, session shows the ROWID value is still set
4) save a second change
-- change does not save, form reverts to Create mode
this problem does not occur when using the primary key columns instead of rowid
see http://apex.oracle.com/pls/apex/f?p=60813:7 for the ROWID version
see http://apex.oracle.com/pls/apex/f?p=60813:11 for the PK column version

Hi Saverio,
Bug *13563808* has been logged to track the reported issue, and a fix will be made available in a future release. Just to clarify, this issue is only arising when the APEX-generated Master-Detail is modified post-generation, so for users who have not modified their Master-Details using ROWID to manage their DML processes, they should not experience this issue.
In relation to my workaround, my suggestion works in my test environment, which I verified before posting the initial suggestion. Please note that the 'Reset Page' process is, by default, conditional on the "Delete" button being pressed. If you have made further modifications to your Master-Detail page, then this might explain why you're seeing different behaviour to me. You might using the "Debug" option on the Developer Toolbar useful. Viewing the debug information should help you to decipher what's going on/wrong on your page. If you still can't resolve the issue, then the safest option might be to revert the page back to it's original state, meaning the user navigates back to the Report page upon submitting changes to the Master-Detail Form page.
Regards,
Hilary

Error while deleting Records using ROWID

Hi all
I have a small PL/SQL Block which accepts the Table Name as the User Input and
deletes duplicate records from that table using ROWID.
SET SERVEROUTPUT ON
SET VERIFY OFF
PROMPT Script to Delete Duplicate Records from a Table using ROWID
ACCEPT TAB_NAME PROMPT 'Enter the Table Name : '
DECLARE
v_tab_name VARCHAR2(50):='&TAB_NAME';
BEGIN
EXECUTE IMMEDIATE 'DELETE FROM v_tab_name AA WHERE AA.ROWID <> (SELECT MIN(B.ROWID) FROM v_tab_name B WHERE AA.ID=B.ID)';
DBMS_OUTPUT.PUT_LINE('Duplicate Records Deleted');
END;
When i execute this query it errors out saying table or view does not exist.
Anybody's help is kindly appreciated.
Regards
Nakul.V

Dear Nakul.V!
Please change your execute immediate statement as follows:
EXECUTE IMMEDIATE 'DELETE FROM ' || v_tab_name || ' AA
                   WHERE AA.ROWID IN (SELECT MIN(B.ROWID)
                                      FROM' || v_tab_name || ' B
                                      WHERE AA.ID=B.ID)';Yours sincerely
Florian W.

How to find rowid of locked rows?

Hello All,
I have the "before update trigger" I want to know the rowid of all the locked row before update so that I dont try to update the same row which is locked by some other user. In Ask Tom forum I have seen how to know the rowid of locked row, but it will work only when Some body got hanged in that Perticular row while trying to update it. I dont want the User to get hanged, for that I want to user before update trigger. Help me.

I believe this is a duplicate of another question in this forum
How to find out rowid of locked row
which I answered.
Justin

ROWID

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