Null values v IOT with primary constraint

Hi gurus.
I've overheard boss' conversation with client, who complaints that one of the columns in a system IOT table with NOT NULL and PRIMARY KEY returns nulls.
Do you have any ideas? I do not have access to this DB, I just wonder, how it could be and what are these points, that we should start with.
Thank you in advance,
Maria.

ou, sorry if I was not so clear, but I'm absolutely calm and even more: it's not my responsibility at all to fix that problem :-))
all that I wanted is just to find some weak places where the reason of the problem could exists and give it my boss while he is busy with his time consuming project (in short, i just wanted to help him to resolve it, not waiting while he will ask me to do that). nobody is in panic, everything is ok in a world.
clear description:
client has a system table (IOT) that sometimes returns null values from column with NOT NULL and PRIMARY KEY constraint. as I remember from school, it's impossible. client wonders if it's an Oracle 9i bug and upgrade to 10g will fix it, or it's a block corruption. I do't know the answer, that's why I'm asking you, Oracle's gurus.
Thank you all,
M.

Similar Messages

Delete after trigger returns a NULL value for the old primary key??

I am creat an After trigger that I was using to delete a row from another table. However, the OLD value returned for my primary key is a NULL value. I have an UPDATE and an INSERT portion to this same trigger that work fine with just grabbing NEW values, but this OLD value cannot be grabbed for some reason, although it seems to work on other tables when the owner is me, the problem table is not owned by me though. Has anyone run into this before? Is there a view that I need access to from this table or perhaps a setting I need to turn on? I am at a loss. Thanks.

Cannot reproduce with this modified trigger code â¦ right now I believe the problem is in this part:
BEGIN
col_ret := vpack.vOPCollectIO(tpid, User, 'SCOTT.OINFTABL', dmltype, vdata);
EXCEPTION
WHEN lost_connection OR lost_connection2 THEN
    col_ret := vpack.vOPCollectIO(tpid, User, 'SCOTT.OINFTABL', dmltype, vdata);
END;
In schema CORE:
SQL> create table oinftabl
2 ( akey     number(9) primary key
3   ,astring varchar2(10)
4   ,astring2 varchar2(10)
5 );
Table created.
SQL>
SQL> grant all on oinftabl to flip;
In schema FLIP (which has âCREATE ANY TRIGGERâ):
flip@FLOP> CREATE OR REPLACE TYPE VDAT AS VARRAY(100000) OF VARCHAR2(50);
2     /
create or replace trigger sbt3_system_oinftabl_x
after insert or update or delete on core.oinftabl
REFERENCING NEW as n OLD as o
FOR EACH ROW
DECLARE
col_ret INT;
dmltype CHAR(1);
tpid VARCHAR2(30);
vdata VDAT; --varray datatype I created;
lost_connection EXCEPTION;
lost_connection2 EXCEPTION;
already_there EXCEPTION;
PRAGMA EXCEPTION_INIT(lost_connection, -28576);
PRAGMA EXCEPTION_INIT(lost_connection2, -28579);
PRAGMA EXCEPTION_INIT(already_there,-1);
BEGIN
tpid := SYS.DBMS_TRANSACTION.LOCAL_TRANSACTION_ID();
IF INSERTING THEN dmltype := 'I';
ELSIF UPDATING THEN dmltype := 'U';
ELSE dmltype := 'D';
END IF;
IF INSERTING OR UPDATING THEN
    dbms_output.put_line('new akey='||nvl(to_char(:n.akey),'null'));
    dbms_output.put_line('new astring='||:n.astring);
    vdata := VDAT(
    to_char(:n.AKEY),
    :n.ASTRING,
    :n.ASTRING2,
    NULL);
ELSIF DELETING THEN
    dbms_output.put_line('old akey='||nvl(to_char(:o.akey),'null'));
    vdata := VDAT(
      to_char(:o.AKEY),
      NULL);
END IF;
for i in 1..vdata.count
loop
    dbms_output.put_line('vdata('||i||')='||nvl(vdata(i),'null'));
end loop;
--BEGIN
-- col_ret := vpack.vOPCollectIO(tpid, User, 'SCOTT.OINFTABL', dmltype, vdata);
--EXCEPTION
-- WHEN lost_connection OR lost_connection2 THEN
--    col_ret := vpack.vOPCollectIO(tpid, User, 'SCOTT.OINFTABL', dmltype, vdata);
--END;
END;
Trigger created.
flip@FLOP> show errors
No errors.
flip@FLOP> insert into core.oinftabl values (1,'abc',null);
new akey=1
new astring=abc
vdata(1)=1
vdata(2)=abc
vdata(3)=null
vdata(4)=null
1 row created.
flip@FLOP> update core.oinftabl set akey=2, astring='cba' where akey=1;
new akey=2
new astring=cba
vdata(1)=2
vdata(2)=cba
vdata(3)=null
vdata(4)=null
1 row updated.
flip@FLOP> delete from core.oinftabl where akey=2;
old akey=2
vdata(1)=2
vdata(2)=null
1 row deleted.
So the trigger has the OLD AKEY value when DELETING and it does successfully store it in the VARRAY.
Hence the problem is in that pl/sql block at the end.
What are you doing in there?

In which case composite primary key allows NULL values in it

Hi to all
In what case composite primary key allows nulls in it.
Let us suppose, I created a composite primary key with 2 attributes.
CREATE TABLE sample
BNK_Id NUMBER(6),
BNK_Name VARCHAR2(20),
CONSTRAINT BNK_Id_Name_PK PRIMARY KEY(BNK_Id,BNK_Name)
When it allows null values in it.
thanks in advance

Are you sure that your instructor was not talking about unique keys? As Solomon said, a primary key always implies not null on all of the columns of the PK. However a unique key does not automatically imply not null, and can have nulls in a column as long as the values in the populated columns are unique.
SQL> create table test (
2     id number,
3     pid number,
4     descr varchar2(10));
Table created.
SQL> alter table test add constraint test_unq
2     unique (id, pid);
Table altered.
SQL> insert into test values (1, null, 'desc1');
1 row created.
SQL> insert into test values (2, null, 'desc2');
1 row created.
SQL> insert into test values (2, null, 'fail1');
insert into test values (2, null, 'fail1')
ERROR at line 1:
ORA-00001: unique constraint (OPS$ORACLE.TEST_UNQ) violatedJohn

Oracle 11.1.0.7.0 Issue with Streams when using NULL value in a key field

Hi,
we have an issue in our replicated environment using Streams.
We have a replicated table using the following index:
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UK_S01_TEXT_FORMAT_TBL01 INDEX_LANGUAGE_LABEL
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UK_S01_TEXT_FORMAT_TBL01 INDEX_PROVIDER_ID
UK_S01_TEXT_FORMAT_TBL01 INDEX_TARIFF_PLAN_COSP_ID
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When we apply a change on that table (either update or delete) we get errors at streams level and the transaction is not propagated.
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Source Commit SCN: 25397175
Source Commit Time: Dec-03-2012 12:21:30
Error in Message: 1
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SMS.S01_TEXT_FORMAT_TBL
ORA-01403: no data found
message: 1
TableName: S01_TEXT_FORMAT_TBL
Operation Type: DELETE
_____ Old Data _____
SOID : 1010000008
SOGID : 124
INDEX_TEXT_FORMAT_ID : MIKE
INDEX_LANGUAGE_LABEL : ITALIAN
INDEX_TEXT_FORMAT_COUNTER : 0
TEXT_FORMAT : Hai raggiunto i 100MB di traffico incluso nello scatto
APPLICA_PERIOD_CRI_ID :
INDEX_TARIFF_PLAN_COSP_ID :
INDEX_PROVIDER_ID :
If I force the set of primary keys to be only the NOT NULL fields, I can successfully apply the error, but since we may have them storing both NULL and NOT NULL values, this is not a solution.
I'm wondering why the DB on one hand converts the empty string in a NULL while inserting, but it looks the Apply process onStandby is not able to do the same when looking for the record before applying the transaction.
Thanks in advance!
Cheers,
Mike

Its showing all objects the user has permission to see- why does that need to be restricted?

Sql query slowness due to rank and columns with null values:


Sql query slowness due to rank and columns with null values:
I have the following table in database with around 10 millions records:
Declaration:
create table PropertyOwners (
[Key] int not null primary key,
PropertyKey int not null,
BoughtDate DateTime,
OwnerKey int null,
GroupKey int null
go
[Key] is primary key and combination of PropertyKey, BoughtDate, OwnerKey and GroupKey is unique.
With the following index:
CREATE NONCLUSTERED INDEX [IX_PropertyOwners] ON [dbo].[PropertyOwners]
[PropertyKey] ASC,
[BoughtDate] DESC,
[OwnerKey] DESC,
[GroupKey] DESC
go
Description of the case:
For single BoughtDate one property can belong to multiple owners or single group, for single record there can either be OwnerKey or GroupKey but not both so one of them will be null for each record. I am trying to retrieve the data from the table using
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from (
select PropertyKey, BoughtDate, OwnerKey, GroupKey,
RANK() over (partition by PropertyKey order by BoughtDate desc, OwnerKey desc, GroupKey desc) as [Rank]
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It is taking 2-3 seconds to get the records which is too slow, similar time it is taking as I try to get the records using the GroupKey. But when I tried to get the records for the PropertyKey with the same query, it is executing in 10 milliseconds.
May be the slowness is due to as OwnerKey/GroupKey in the table can be null and sql server in unable to index it. I have also tried to use the Indexed view to pre ranked them but I can't use it in my query as Rank function is not supported in indexed
view.
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create table #result (PropertyKey int not null, BoughtDate datetime, OwnerKey int null, GroupKey int null, [Rank] int not null)Create index idx ON #result(OwnerKey ,rnk)
insert into #result(PropertyKey, BoughtDate, OwnerKey, GroupKey, [Rank])
select PropertyKey, BoughtDate, OwnerKey, GroupKey,
RANK() over (partition by PropertyKey order by BoughtDate desc, OwnerKey desc, GroupKey desc) as [Rank]
from PropertyOwners
go
declare @ownerKey int = 1
select PropertyKey, BoughtDate, OwnerKey, GroupKey
from #result as result
where result.[Rank]=1
and result.[OwnerKey]=@ownerKey
go
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
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MS SQL Consulting:
Large scale of database and data cleansing
Remote DBA Services:
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How to transfer database table contain null values, primary key, and foreign key to the another database in same server. using INSERT method.

how to transfer database table contain null values, primary key, and foreign key to the another database in same server. using INSERT method. thanks

INSERT targetdb.dbo.tbl (col1, col2, col3, ...)
SELECT col1, col2, col3, ...
FROM sourcedb.dbo.tbl
Or what is your question really about? Since you talke about foreign keys etc, I suspect that you want to transfer the entire table definition, but you cannot do that with an INSERT statement.
Erland Sommarskog, SQL Server MVP, [email protected]

JDBC MS Access--- cannot extract entry with null value with data type Meta

I'm trying to extract a data entry with null value by using JDBC. The database is MS Access.
The question is how to extract null entry with data type memo? The following code works when the label has data type Text, but it throws sqlException when the data type is memo.
Any advice will be appreciated! thanks!
Following are the table description and JDBC code:
test table has the following attributes:
Field name Data Type
name Text
label Memo
table contents:
name label
me null
you gates
Code:
String query = "SELECT name, label FROM test where name like 'me' ";
ResultSet rs = stmt.executeQuery(query);
while (rs.next())
String name = rs.getString("name");
rs.getString("val");
String label = rs.getString("label");
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catch (SQLException ex)
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yet SELECT name, label FROM test
null
0
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The question is how to extract null entry with data type memo?Okay, what you need to do is this:
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Sukey Nakasima

Hello,
I found the answer in this link https://social.technet.microsoft.com/Forums/sqlserver/en-US/f9c02ce3-96b2-4cd6-921f-3679eb22d790/dont-want-to-cross-join-with-null-values-in-mdx?forum=sqlanalysisservices
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Sukey Nakasima
Sukey Nakasima

Need help with NULL values in Crosstables

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http://forum.cloveretl.com/viewtopic.php?f=4&t=6508
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Just converted from CF5 to CF7. Finally figured out what was
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The main query merges data from a store and a region table.
I'm doing a LEFT OUTER JOIN to combine the REGION with the STORE,
AND so that stores with NO SALES for a given day will show up as
ZERO. On the main report, when I don't use a QofQWhen grouping by
DAY or MONTH, I can test the value in the CFOUTPUT for NULL or ZERO
and display "0" or "N/A" on the report.
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</CFIF>
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<CFIF '#url.reptype#' IS "DAILY">
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ORDER BY ISNULL(d.depday, '#url.date1#') DESC
<CFELSE>
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ORDER BY year(ISNULL(d.depday, '#url.date2#')),
month(ISNULL(d.depday, '#url.date2#'))
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charted every value correctly.
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I really appreciate your time and efforts to help with this
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Gary

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-Mark

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Apart from capturing with an exception in PL/SQL code, if you're wanting something in a script as pure SQL, you'd have to generate an additional row and only select that where no data is found e.g...
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Null values v IOT with primary constraint

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