Deletion from parent table

Hi,
Is it possible to delete parent records from parent table without deleting from child tables ?
I can delete the records after disabling the constraints . But I couldn't enable the constraint on child table after deletion of parent records from parent table.
Please Help.

Two Alternatives
1. What is the need of child records if no parent record ? No use keeping the child records without parent records.
For e.g., If we have Invoice_Master containing the Distributor and total amount and Other Transport details and Invoice_Details containing the list of Items the Distributor has purchased. In this case if we delete the Invoice_Master then the Invoice_Details is meaning less.
2. Another case If really need to maintain the Child records then create one dummy record in the Parent and link the Child records to the dummy Parent by changing the Foreign Key value to the dummy Parent record Primary Key Value.

Similar Messages

Can't delete from parent table if FK constraint on the out-of-line table

Using Oracle XML DB 11g
I am using out-of-line storage table to store a collection of XML elements in conjuction with storeVarrayAsTable="true". So what I have is a parent table containing a nested table of VARRAY of REFs to rows in the out-of-line table.
In addition, I have a foreign key constraint placed on a column in the out-of-line table.
My problem is that I am not able to delete rows from the parent table when the FK constraint is placed on the out-of-line table. Only when I drop the FK constraint does the deletion work - all associated rows in the nested table and out-of-line table
gets deleted correctly.
With the FK constraint, deleting the child document like this
dbms_xdb.deleteResource('/project-1.xml')
gives me this error:
ORA-31018: Error deleting XML document
ORA-03001: unimplemented feature
*Cause: The XMLType object pointed to by the given REF could not
be deleted because either the REF was invalid or it pointed to a non-existent table.
     *Action: Either use FORCE deletion or supply a valid REF.
I have tried deleting with the FORCE options as well with no success.
Using DBMS_XDB.DELETE_RECURSIVE_FORCE option doesn't produce an error, but doesn't perform the deletion either.
Here is the XML Schema:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xdb="http://xmlns.oracle.com/xdb" xmlns:xlink="http://www.w3.org/1999/xlink"
elementFormDefault="qualified" attributeFormDefault="unqualified" xdb:storeVarrayAsTable="true">
<xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.w3.org/1999/xlink.xsd"/>
<xs:element name="project" xdb:defaultTable="PROJECT_TAB">
<xs:complexType xdb:SQLType="PROJECT_TYP">
<xs:sequence>
<xs:element name="resourceList" minOccurs="0" xdb:SQLName="RESOURCE_LIST">
<xs:complexType xdb:SQLType="RESOURCE_LIST_TYP">
<xs:sequence>
<xs:element name="aResource" type="refType" minOccurs="0" maxOccurs="unbounded" xdb:SQLInline="false"
xdb:SQLName="A_RESOURCE_REF" xdb:defaultTable="RESOURCE_REF_TAB"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="aguid" type="xs:string" use="required" xdb:SQLName="AGUID"/>
</xs:complexType>
</xs:element>
<xs:element name="aResource" xdb:defaultTable="A_RESOURCE_TAB">
<xs:complexType xdb:SQLType="A_RESOURCE_TYP">
<xs:complexContent>
<xs:extension base="contactType">
<xs:attribute name="aguid" type="xs:string" use="required" xdb:SQLName="AGUID"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
</xs:element>
<xs:complexType name="contactType" xdb:SQLType="CONTACT_TYP">
<xs:sequence>
<xs:element name="name" type="xs:string" xdb:SQLName="NAME"/>
<xs:element name="email" type="xs:string" minOccurs="0" xdb:SQLName="EMAIL"/>
<xs:element name="phone" type="xs:string" xdb:SQLName="PHONE"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="refType" xdb:SQLType="REF_TYP">
<xs:attribute ref="xlink:href" use="required"/>
<xs:attribute name="oref" type="xs:string" use="optional" xdb:SQLName="OREF"/>
</xs:complexType>
</xs:schema>
I registered the schema using structured storage with these options:
BEGIN
DBMS_XMLSCHEMA.registerschema(
SCHEMAURL => 'LSDProjects.xsd',
SCHEMADOC => xdbURIType('/home/LSDProject2/LSDProjects.xsd').getClob(),
LOCAL => TRUE, -- local
GENTYPES => TRUE, -- generate object types
GENBEAN => FALSE, -- no java beans
GENTABLES => TRUE -- generate object tables
END;
The PK and FK constraints were added like this:
-- Add PK constraints on aResource/@aguid attributes
ALTER TABLE A_RESOURCE_TAB ADD CONSTRAINT A_RESOURCE_AGUID_IS_UNIQUE UNIQUE (XMLDATA."AGUID");
-- Add FK constraint on out-of-line table
ALTER TABLE RESOURCE_REF_TAB
ADD (CONSTRAINT ref_resource_aguid_is_valid FOREIGN KEY (XMLDATA."OREF")
REFERENCES A_RESOURCE_TAB(XMLDATA."AGUID"));
Here are the XML instance documents:
     where resource-1.xml looks like this :
<aResource aguid="resource-1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="LSDProjects.xsd">
     <name>Jane Doe</name>
     <email>[email protected]</email>
<phone/>
</aResource>
     and project-1.xml looks like this :
     <project aguid="project-1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="LSDProjects.xsd"
               xmlns:xlink="http://www.w3.org/1999/xlink">
          <resourceList>
               <aResource xlink:href="/resource-1.xml" oref="resource-1"/>
          </resourceList>
     </project>
where <project> document contains a collection of <aResource> elements stored in the out-of-line table and
project/@oref attribute is a foreign key to the primary aResource/@aguid attribute.
Can someone shed some light on why I am unable to delete "project-1.xml" from the repository when the FK constraint is applied onto the out-of-line table.
Any advice/suggestions would be appreciated. Thanks!

Thank you for the quick reply, mdrake.
I am currently prototyping and testing out (best) ways to achieve data integrity with XML data in XML DB.
I have instance documents that makes cross references to values in other instance documents
(not of the same root nodes). What I'm trying to enforce is a referential constraint between the documents
so that a document cannot be inserted if the referenced document doesn't exists.
In this situation, a <project> document contains a collection of elements with @oref attributes.
The collection is stored in an out-of-line table.
For example:
<project>
<resourceList>
<aResource ... oref="resource-1"/>
<aResource ... oref="resource-2"/>
</resourceList>
</project>
The @oref (FK) attribute above references a @aguid (PK) attribute in <aResource> document (below):
<aResource aguid="resource-1"> .... </aResource>
Basically, I want to ensure that the value of
/project/resourceList/aResource/@oref
correspond to a valid
/aResource/@aguid
Note that I was able to add the FK constraint on the OOL table without any issues.
And the constraint did work as expected as I was not allowed to insert a <project> document
that referenced a non-existent /aResource/@aguid.
The problem was that I could not delete the <project> document from the XML DB repository
once the FK contraint was added. Deleting with the DELETE_RECURSIVE_FORCE option did not give
me any errors - is just didn't do anything.
I guess there are certain limitations with using out-of-line tables.
BTW, sorry the examples are hard to read as the indentations are removed when posting.

Deleting a row from parent table

Dear Guru's
I am having two table with parent - child relationship. My problem is when I am deleting a row from parent table the curresponding child row from child table also should be deleted.
My Primary table 'Employee, EMPID Primary key
Child table 'Privilage' inthis EMPID referencing the EMPID of Employee table
My need is when I am deleting a row from parent table the curresponding child row from child table also should be deleted
I issued the SQL query like,
delete from employee where empid='12345' cascade constraints;
Then it showing me error like,
ERROR at line 1:
ORA-00933: SQL command not properly ended
Please resolve my issue , Its Top urgent
Thanks & Cheers
Antony

Choosing How Foreign Keys Enforce Referential Integrity
Oracle Database allows different types of referential integrity actions to be enforced, as specified with the definition of a FOREIGN KEY constraint:
Prevent Delete or Update of Parent Key The default setting prevents the deletion or update of a parent key if there is a row in the child table that references the key. For example:
CREATE TABLE Emp_tab (
FOREIGN KEY (Deptno) REFERENCES Dept_tab);Delete Child Rows When Parent Key Deleted The ON DELETE CASCADE action allows parent key data that is referenced from the child table to be deleted, but not updated. When data in the parent key is deleted, all rows in the child table that depend on the deleted parent key values are also deleted. To specify this referential action, include the ON DELETE CASCADE option in the definition of the FOREIGN KEY constraint. For example:
CREATE TABLE Emp_tab (
    FOREIGN KEY (Deptno) REFERENCES Dept_tab
        ON DELETE CASCADE); Set Foreign Keys to Null When Parent Key Deleted The ON DELETE SET NULL action allows data that references the parent key to be deleted, but not updated. When referenced data in the parent key is deleted, all rows in the child table that depend on those parent key values have their foreign keys set to null. To specify this referential action, include the ON DELETE SET NULL option in the definition of the FOREIGN KEY constraint. For example:
CREATE TABLE Emp_tab (
    FOREIGN KEY (Deptno) REFERENCES Dept_tab
        ON DELETE SET NULL);
SQL> conn scott/tiger
Connected.
SQL> create table ppk ( no number primary key);
Table created.
SQL> begin for inn in 1..10 loop insert into ppk values (inn); end loop; end;
PL/SQL procedure successfully completed.
SQL> create table ffk ( no number references ppk(no));
Table created.
SQL> begin for inn in 1..10 loop insert into ffk values (inn); end loop; end;
PL/SQL procedure successfully completed.
SQL> drop table ppk cascade constraints;
Table dropped.Message was edited by:
user52
Message was edited by:
user52
Message was edited by:
user52

Could not delete from specified table?

hi all,
i'm getting this error could not delete from specified table when i execute a delete on dbf file via JDBC-ODBC bridge, when i execute an update table command i get operation must use an updatable query, but i'm not updating the query returned from select statement.
Does anyone have similar problem before??

Hi,
my code is below:
try {
conn=DriverManager.getConnectio("jdbc:odbc:sui","","");
stmt = conn.createStatement();
int r= stmt.executeUpdate("Update Alarms set ACK=True WHERE DT = { d '" + msgdate + "' } AND TM= '" + msgtime + "'");
System.out.println(r+" records updated in Alarms ");
stmt.close();
conn.close();
stmt=null;
conn=null;
catch (NullPointerException e) {System.out.println(e.getMessage());}
catch (SQLException e) {System.out.println(e.getMessage());}
I have an ODBC datasource called sui and a table called alarms, i need to write into the column Ack to true when DT equals msgdate and TM equals msgtime, the error returned is Operation must use an updatable query.
I believe the SQL has no problem because there is no SQL syntax error and i'm not updating any resultset returned from select query.
When i delete, i get could not delete from specified table. Anyone has any idea wh'at's wrong?

Deleting from multiple tables

I have a master table and a detail table. I need to delete a set of records from both the master and detail tables based on a criteria. Now if I delete from one table then I will not know which records I have to delete from the other table. So the records needs to be deleted from both the tables using the criteria. My SQL statement to select the records is
<<
select *
FROM TL_RATE A, TL_RATE_DETAIL B
WHERE A.CARRIER_ID = B.CARRIER_ID
AND A.TARIFF_CLASS_ID = B.TARIFF_CLASS_ID
AND A.LANE_ID = B.LANE_ID
AND A.SERVICE_COM_ID = B.SERVICE_COM_ID
AND A.EFFECTIVE = B.EFFECTIVE
AND DATE_INVALID < SYSDATE-365;
>>
Thanks

You don't show what table DATE_INVALID is in. However, you should just delete the matching rows from the OTHER table first then that table. This is very slightly different from the rows returned by your query since your query is an inner join. In other words, you're excluding rows that might exist in one table but not the other. Assuming DATE_INVALID is in TL_RATE ...
delete tl_rate_detail
where (CARRIER_ID, TARIFF_CLASS_ID, LANE_ID, SERVICE_COM_ID, EFFECTIVE) in (
select CARRIER_ID, TARIFF_CLASS_ID, LANE_ID, SERVICE_COM_ID, EFFECTIVE
from tl_rate
where date_invalid < sysdate - 365)
delete tl_rate
where date_invalid < sysdate - 365
/Richard

Deleting from multiple tables where few tables have same column name

Hi,
I am new to PL/SQL and need some help. I need to delete data older then X years from some 35 odd tables in my schema and out of those tables 25 tables have same column name on which i can have my "where" clause and rest 10 table have different table names. I am doing something like this :
declare
table_list UTL_FILE.FILE_TYPE;
string_line VARCHAR2(1000);
tables_count number:=0;
table_name VARCHAR2(400);
column_name VARCHAR2(400);
BEGIN
table_list := UTL_FILE.FOPEN('ORALOAD','test7.txt','R');
DBMS_OUTPUT.PUT_LINE(table_list);
LOOP
UTL_FILE.GET_LINE(table_list,string_line);
table_name := substr(string_line,1, instr(string_line,'|')-1);
column_name := substr(string_line, instr(string_line,'|')+1);
DBMS_OUTPUT.PUT_LINE(table_name);
DBMS_OUTPUT.PUT_LINE(column_name);
IF column_name = 'SUBMISSION_TIME' THEN
delete from :table_name where to_date(:column_name)<(sysdate-(365*7));
ELSE
delete from || table_name || where ( || to_date(column_name) || ) <(sysdate-(365*7));
END IF;
END LOOP;
EXCEPTION
WHEN NO_DATA_FOUND THEN
UTL_FILE.FCLOSE(table_list);
DBMS_OUTPUT.PUT_LINE('Number of Tables processed is : ' || tables_count);
UTL_FILE.FCLOSE(table_list);
END;
WHERE the text file "text7.txt" contains list of table name and column names separated by a pipe line. But when I execute the above proc it gives error "invalid table name".
Can something like this be done or is there any other way to execute this task of deletion from 35 tables.
Thanks.

Thanks for replies. I don't know what I am doing wrong but still not getting this damn thing work...This is the proc i am running now :
declare
table_list UTL_FILE.FILE_TYPE;
string_line VARCHAR2(1000);
tables_count number:=0;
table_name VARCHAR2(4000);
column_name VARCHAR2(4000);
code_text VARCHAR2(2000);
BEGIN
table_list := UTL_FILE.FOPEN('ORALOAD','test7.txt','R');
LOOP
UTL_FILE.GET_LINE(table_list,string_line);
table_name := substr(string_line,1, instr(string_line,'|')-1);
column_name := substr(string_line, instr(string_line,'|')+1);
IF column_name = 'SUBMISSION_TIME' THEN
DBMS_OUTPUT.PUT_LINE('do nothing');
ELSE
code_text:= 'begin delete from'|| (table_name) ||'where to_date' || (column_name) || '<(sysdate-(365*7))';
Execute Immediate code_text;
END IF;
END LOOP;
EXCEPTION
WHEN NO_DATA_FOUND THEN
UTL_FILE.FCLOSE(table_list);
DBMS_OUTPUT.PUT_LINE('Number of Tables processed is : ' || tables_count);
UTL_FILE.FCLOSE(table_list);
END;
But it gives following error :
" ORA-06550: line 1, column 51:
PL/SQL: ORA-00933: SQL command not properly ended
ORA-06550: line 1, column 7:
PL/SQL: SQL Statement ignored
ORA-06550: line 1, column 68:
PLS-00103: Encountered the symbol "end-of-file" when expecting one of the following:
ORA-06512: at line 22 "

Delete from internal table

Hi,
I want to delete from internal table some regords.
I write code:
delete isrot where bldat < '01.09.2005'.
it doesn't work, what is wrong?
regards,
Joanna

hi,
you write the statement like....
<b>delete FROM isrot where bldat < '01.09.2005'.</b>
now it will work...
To select the lines that you want to delete using a condition, use the following:
<b>DELETE FROM <target> WHERE <cond> .</b>
All of the lines in the database table that satisfy the conditions in the WHERE clause are deleted. The FROM expression must occur between the keyword and the database table.
You should take particular care when programming the WHERE clause to ensure that you do not delete the wrong lines. For example, if you specify an empty internal table in a dynamic WHERE clause, all of the lines in the table are deleted.
If at least one line is deleted, the system sets SY-SUBRC to 0, otherwise to 4. SY-DBCNT contains the number of lines deleted.
follow this link for more information on internal table operation.
http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3aef358411d1829f0000e829fbfe/content.htm
regards,
Ashok Reddy
Message was edited by:
Ashok Reddy

WBS elements not deleted from PRPS table

Hi Experts,
In CJ20N transaction:
When I delete a project with project profile (ZABC):
- The project record is completely deleted from 'PROJ' table.
- The WBS records are completely deleted from 'PRPS' table.
When I delete another project with different project profile (ZXYZ):
- The project record is completely deleted from 'PROJ' table.
- The WBS records are NOT deleted from 'PRPS' table.
What is the reason for not deleting records from PRPS table?
Thanks in advance for your valuable answers.

WBS should be having actuals.

Create Trigger to Delete from multiple tables

Hello:
I'm trying to write a trigger which will allow me to delete from multiple records. I have two tables where the record for the same client_id needs to be deleted.
Is it possible to do this? I started writing some code and this is what I have so far:
create or replace trigger app_t1
before delete on <table1> ?? -
for each row
begin
delete from client where clientid = :new.clientid;
delete from key where pk = :newclientid;
end;I'm stuck on the line where I have "before delete on" where I'm supposed to provide a table name. I can only use one table and I need to delete from two.
This trigger is supposed to be used within APEX. In APEX, fields are designated as :P1_clientid where P1 references page 1 of the application. Yet, :P1_clientid is set to the field clientid in the table.
So when I write my trigger, I'm not sure how I'm supposed to set my variables.
Can someone help?
I'm also going to post this into the APEX forum.
Thanks.

It's not clear to me if you are just trying to keep two tables in syn or whether you are trying to achieve something else.
A couple of points though:
- In delete database triggers the :new attributes are NULL. You probably mean to use the :old attributes.
- Is there some relationship between the two tables? If so, setting the foreign key to CASCADE DELETE might do the trick for you.
- Another option - better than a database trigger in my opinion - is to just code a procedure that deletes from both tables and call that one from APEX.
Regards,
Rob.

Once a row is deleted from a table ,how can i recover it back in the table?

Hi
I have made a delete program in Jdev. I had deleted some of the rows from table such that count goes 2 from 10.
Now I want to use this table again for some other program,how should i restore the deleted rows so that i can use the table properly.
However toad tool showing that no row is deleted from the table.
Thanks & Regards

Can you please elaborate how are you deleting rows from table.

Delete from two tables in one statement

Hi,
Is there a way to delete from two tables in one statement?
Actually I have two tables:
1. Base table (id, name, age)
2. Person table (id, city, street)
The id in both tables is identical.
I would like to delete using something like a join:
Delete from base, person where id=2;
Thanks
dyahav

Hi,
If you want to delete records both at a time them your table must use ON DELETE CASCADE. See the below example.
CREATE TABLE supplier
( supplier_id numeric(10) not null,
supplier_name varchar2(50) not null,
contact_name varchar2(50),
CONSTRAINT supplier_pk PRIMARY KEY (supplier_id)
CREATE TABLE products
( product_id numeric(10) not null,
supplier_id numeric(10) not null,
CONSTRAINT fk_supplier
FOREIGN KEY (supplier_id)
REFERENCES supplier(supplier_id)
ON DELETE CASCADE
In this example, we've created a primary key on the supplier table called supplier_pk. It consists of only one field - the supplier_id field. Then we've created a foreign key called fk_supplier on the products table that references the supplier table based on the supplier_id field.
Because of the cascade delete, when a record in the supplier table is deleted, all records in the products table will also be deleted that have the same supplier_id value.
Thank you.

Condition Record PB00 gets deleted from A018 table

Hi Gurus-
Could anyone of you explain how the PB00 condition is getting deleted from A018 table (Purch Org Level Condition)? It looks like some batch job is randomly setting the Valid to Date A018-DATBI to yesterday's date and today there is no valid time dependent condition.
I don't know any process/program that accesses PB00 condition in table A018 other than MEK1 or MEK4.
Does SD condition type change has any impact in Purchasing Price (PB00). Although all the Rate/Price is stored in the same table KONP but separated by application area and table (A017, A018, A071, A073).
Can anybody shed some lights on this please?

Thanks for your reply. We know the user name who is making the change in A018. It is a batch user ID that makes the change but we have about 100 differentg background batch job that is scheduled everyday and I went through every one of them but did not raise any flag.
And the worst part is since it is done by the batch user id (batch job), there is no change record (if I try to do MEK3-Environment>display changes) not even an entry in CDHDR table or CDPOS table.
Trying to see if you guys know of any SD or MM program that accesses that table and set the valid to field to yesterdays date and create a new condition record (KNUMH) with valid to date 31.12.9999 and rate (value) to 0.00?
Please let me know if you have any suggestion.
Thanks in advance.

Delete from two tables at the same time

Hi,
Is there way to delete from many tables at the same time ?
delete from tbl1, tbl2;
Thank you

953402 wrote:
Hi,
Is there way to delete from many tables at the same time ?
delete from tbl1, tbl2;
Thank youNO
Consider to actually Read The Fine Manual below
http://docs.oracle.com/cd/E11882_01/server.112/e26088/toc.htm

Records have been deleted from the table.

Hi all ,
If records have been deleted from the table that any log file maintains the history as following Way.
User Name who delete the records.
Machine name where the command is execute.
The command syntax e.g delete from abc where ..
or any other help related to mentioned problem.
Regards,
Mobeen.

Wrong forum .. your question doesnt make much sense.
But take a look at Oracle Auditing.

Deletion from multiple tables

Hi,
I am having three tables
Payment (Parent)
Header (Child)
Items (Grand Child)
one payment can have multiple header and the header can have multiple item in it.
P
H H -- level 1
I I I I -- level 2
e.g one payment is having 2 headers and each header is having 2 items in it.
I need to delete the item table first then header table then payment table.
Condition for deletion. There is field(flag) in item table which decides when to delete record. I need to delete record when all the item records flag value is 2.
How to check for all items flag value?
P1
H1 H2
I1 I2 I3 I4
2 1 1 1
P1
H1 H2
I1 I2 I3 I 4
1 1 2 2
Since if we miss any check at level 1 or level 2 We will be having Orphan records in the database.
First case(Level 2 check is missed)then
I1 -> H1 -> P1 deleted
and we have H2,I2,I3,I4 Orphans
Second Case (Level 1 Check is missed)then
I3,I4 -> H2 -> P1 deleted
and we have H1,I1,I2 as orphans.
Please help how to check the flag value of each item. These table are related through primary and foreign keys.
Thanks in advance
Edited by: anu2 on Oct 20, 2009 12:04 AM

Double negation coming up again...
You can identify the parents that are eligable for deletion as follows:
select p.*
from Payment p
where not exists
      (select 'x'
       from Header h
       where h.FK = p.PK
         and not exists
              (select 'x'
               from Items i
               where i.FK = h.PK
                 and i.status != 2))And then use the resultset of above query to:
- delete the grandchildren of these parents first,
- and then delete the children of these parents,
- and then delete the parents.
Maybe this helps.
Edited by: Toon Koppelaars on Oct 20, 2009 9:19 AM

Deletion from parent table

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