Deleting some rows

I want to delete half of the columns of a table...or perhaps a 1/4 of it. Is there any way to do this in oracle 8i?

You can also have Oracle pick rows randomly, i.e.
SELECT *
FROM <<someTable>> SAMPLE( 10 )will return approximately 10% of the table rows. You could then delete the rows that are returned by the above query.
This approach will likely be more costly than Indirakumar's answer, but will be more likely to maintain the current data distribution.
Justin

Similar Messages

Strange issue on deleting some rows on SYS.AUD$ table

I just found out this strange thing happened on my 10gR2 database. I created a user called AUDIT_LOG and GRANT DELETE, REFERENCES, SELECT ON SYS.AUD$ TO AUDIT_LOG when I logged on as SYS dba.
(1) Then I logged on as AUDIT_LOG user, tested the following statements:
SELECT count(*) from sys.aud$ where ntimestamp# < TRUNC (SYSDATE-14);
COUNT(*)
2
DELETE from sys.aud$ where ntimestamp# < TRUNC(SYSDATE-14);
0 rows deleted
(2) When I logged on as SYS account, SYS deleted them all,
DELETE from sys.aud$ where ntimestamp# < TRUNC(SYSDATE-14);
2 rows deleted
I don't understand why the AUDIT_LOG user can't delete that two rows?
Thanks for your help!
lixidon

Apologies for misreading the first time. I am wondering if the rows in question were related to audit actions on sys.aud$ itself as those rows should not be deleted by the AUDIT_LOG user (even if the user has been granted delete).
Here's an excerpt from the Security Guide under the "Protecting the Standard Audit Trail" section:
Audit records generated as a result of object audit options set for the SYS.AUD$ table can only be deleted from the audit trail by someone connected with administrator privileges, which itself has protection against unauthorized use.
Here's a quick example illustrating this:
SQL> connect / as sysdba
Connected.
SQL> grant delete, references, select on sys.aud$ to scott;
Grant succeeded.
SQL> connect scott/tiger
Connected.
SQL> select count(*) from sys.aud$ where sessionid = 30002;
COUNT(*)
2
1 row selected.
SQL> delete from sys.aud$ where sessionid = 30002;
2 rows deleted.
SQL> commit;
-- now try to delete the sys.aud$ rows related to the above delete
-- this will not succeed as user scott even though delete has been granted
-- the session that performed the delete is 422426
SQL> select count(*) from sys.aud$ where obj$name = 'AUD$' and action# = 7 and sessionid = 422426;
COUNT(*)
2
1 row selected.
SQL> delete from sys.aud$ where obj$name = 'AUD$' and action# = 7 and sessionid = 422426;
0 rows deleted.
SQL>Regards,
Mark

Deleting multiple rows from SUD dialog table

Hi,
I have some SUD dialog tables that I would like to delete some rows from. I can select and delete all or one row (using a SUD button that finds out which one row was selected or if all, and then deleting them with the table.rows.remove command), but I seem to have troubles if I want to select multiple rows (either in a range, ex: rows 3-10, or non-sequential, ex: 1, 4, 6 and 23). I just started working on this but thought maybe someone has already done this and can save me the trouble!
Thanks!
Julia Moeller

Hi Julia,
Just a quick guess-- try looping backwards and deleting the last rows first:
FOR i = 10 TO 3 Step -1
table.rows.remove i
NEXT
Haven't tested it, so no guarantees,
Brad Turpin
DIAdem Product Support Engineer
National Instruments

Error while deleting a row in entity

Hi
I am facing a problem while trying to delete a row from a entity.
Below is the scenario where i am facinmg a problrm.
I have a ViewObject which has attributes from two entity and on e transient variable.
in the RowImpl java class for the above Viewobject i changes the getter method of the transient variable to some text.
I display all the Viewobject as a table in the UI.
When a user selects a row and press delete method.
I get a id(one of the attribute from the Viewobject) from the selected row and remove the row from the Entity.
When i try to commit the changes i am getting the below error
Another user has changed the row with primary key oracle.jbo.Key [742]. (Another user has changed the row with primary key {0}.)
Can any one please help me in this
Thanks
Ranjith

check {message:id=9271952}

Error while deleting a row from the Entity Object

Hi OAF Guys,
i am unable to delete the newly created row from the entity object.
let me explain my scenario.
1. i have a table of which some of the columns are mandatory.
2. I am writing the code in the validateEntity to check wether the user really enter anything into the fields.
3. My problem is, when the user creates row and wanted to delete the row without entering any details, the validate entity of the EO gets fired which will not allows to delete the row.
Is there any workaround for this problem.
Regards,
Nagesh Manda.

Hi Tapash,
I am very sorry for not providing you the complete details of my scenario. Here i am explaining
1. what code you have placed while creating the row and in validation method on EOImpl.
while creating a new row i am initializing the primary key of the EO with the sequence value.
2.When you say, you are unable to delete the row, are you getting a error message ? if yes, custom message or fwk error ?
its not the fwk error, its the custom message which wrote in my validateEntity method of EO to check whether the user had entered all the necesary columns or not.
3.How are you trying to delete the row ?
while the user clicks on the delete switcher i am getting the primary key of the row and searching for the row in the vo and finally deleting it.
The problem arises when the user creates a row, and later doesnt want to enter the details and delete it. Here while deleting the row the validateEntity method of the EO gets fired and doesnt allow me to do so :(.
Any way appreciate your help tapash.
Regards,
Nagesh Manda.

How to delete empty row without validation error in ADF Table(EMP)

Hi Everyone,
I am using EMP Table in ADF jspx page to insert the data into database.when i insert a row into table by createInsert operation,it inserting the row.But I need to delete that row immediately with out entering any value.
But it showing some validation error at empno.Is there any ways to delete the empty row?if not,what are the reasons that we can't delete the row.
could any one tell me the reasons!!
Thanks in advance!!
With Best Regards,
Amar
Edited by: 973755 on Dec 11, 2012 6:42 AM

Amar,
I am little confused with your logic here.....
but if you are trying to remove the row by clicking Remove button, you can set the immediate property to true and that remove function will run without executing any entity validation.......
-R

How to delete a row in Numbers on iPhone?

I'm pulling my hair out on this one. The "Help" for Numbers for iPhone both in-app and on the web states that to:
Delete a row anywhere in the table: Tap the bar left of the row, then tap Delete.
So here is what I see before I tap the bar left of the row:
There is no bar left of the row unless I first tap into one of the cells. Then, when I tap the bar left of the row, this is what I get:
I see no "Delete" on which to tap. Nor do I see "Hide" or "Insert", which, according the the Help, should also be available options once I've tapped that left side bar. The only things I am able to do with the row are move it up or down, and change its height.
Am I missing something, doing something wrong, or is this a bug in Numbers? I'm on an iPhone 5s with auto app updates, so I have the latest version of Numbers.
Thanks

Hi Varcar,
Usually when I tap the bar, as you did, I get a popup menu with some choices. Cut, Copy, Paste then an arrow taht I can then tap to reveal Delete, Hide, Chart. Have you tried to retap on the blue highlight on that bar? It might just want more attention.
Quinn

HOW TO DELETE THE ROW FROM DATABASE

hI,
Iam pasting my code below.My problem isi retrieve rows from database and display them in jsp page in rows.For each row there is delete hyperlink.Now when i click that link i should only delete the row corresponding to that delete link temporarily but it should not delete the row from database now.It should only delete the row from database when i click the save button.How can i do this can any one give some code.
thanks
naveen
[email protected]
<%@ page language="java" import="Utils.*,java.sql.*,SQLCon.ConnectionPool,java.util.Vector,java.util.StringTokenizer" %>
<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Item Details</title>
<script>
function submitPage()
document.details.action = "itemdetails.jsp" ;
document.details.submit();
</script>
</head>
<body>
<form name="details" action="itemdetails.jsp" method="post">
<%
ConnectionPool pool;
Connection con = null;
Statement st;
ResultSet rs =null;
%>
<table border="0" cellpadding="0" cellspacing="0" width="328">
<tr>
<td width="323" colspan="4"><b>Reference No :</b> <input type="text" name="txt_refno" size="14">
<input type="submit" value="search" name="search" ></td>
</tr>
<tr>
<td width="81" bgcolor="#000099"><font color="#FFFFFF"><b>Item Code</b></font></td>
<td width="81" bgcolor="#000099"><font color="#FFFFFF"><b>Item No</b></font></td>
<td width="81" bgcolor="#000099"><font color="#FFFFFF"><b>Amount </b></font></td>
<td width="80" bgcolor="#000099"> </td>
</tr>
<%
pool= new ConnectionPool();
Utils utils = new Utils();
double total =0.00;
String search =utils.returnString(request.getParameter("search"));
if(search.equals("search"))
try
String ref_no =utils.returnString(request.getParameter("txt_refno"));
String strSQL="select * from ref_table where refno='" + ref_no + "' ";
con = pool.getConnection();
st=con.createStatement();
rs = st.executeQuery(strSQL);
while(rs.next())
String itemcode=rs.getString(2);
int item_no=rs.getInt(3);
double amount= rs.getDouble(4);
total= total + amount;
%>
<tr>
<td width="81"><input type=hidden name=hitem value=<%=itemcode%>><%=itemcode%></td>
<td width="81"><input type=hidden name=hitemno value=<%=item_no%>><%=item_no%></td>
<td width="81"><input type=hidden name=hamount value=<%=amount%>><%=amount%></td>
<td width="80"><a href="delete</td>
</tr>
<%
}catch(Exception e){}
finally {
if (con != null) pool.returnConnection(con);
%>
<tr>
<td width="323" colspan="4">
<p align="right"><b>Total:</b><input type="text" name="txt_total" size="10" value="<%=total%>"></td>
</tr>
<tr>
<td width="323" colspan="4">
<input type="button" value="save" name="save"></td>
</tr>
</table>
</form>
</body>
</html>

You mean when you click on the hyperlink you want that row to disappear from the page, but not delete the row from the database until a commit/submit button is pressed?
Personally, I think I'd prefer that you have a delete checkbox next to every row and NOT remove them from the display if I was a user. You give your users a chance to change their mind about their choice, and when they're done they can see exactly which rows will be deleted before they commit.
You know your problem, of course, so you might have a good reason for designing it this way. But I'd prefer not removing them from the display. JMO - MOD

Unable to delete a row in table control

Hi,
I'm unable to delete a row in table control.
I have defined a selection column for my table control but it is not getting value 'X' when i'm selecting a row for deletion.
Also, when I press enter, some of the columns in table control are getting initialized. I'm passing these values to the internal table along with other columns.
Please help.
Regards,
Manasee
Message was edited by: Manasee Chandorkar

hi,
kindly chk this.
PROCESS BEFORE OUTPUT.
MODULE status_9010.
LOOP WITH CONTROL tab_control.
MODULE move_data_to_table.
ENDLOOP.
PROCESS AFTER INPUT.
LOOP WITH CONTROL tab_control.
MODULE move_data_from_table.
ENDLOOP.
*& Module move_data_to_table OUTPUT
This is to move the data from the internal table to the table control
MODULE move_data_to_table OUTPUT.
This is to move the data from the internal table to the table control
zmpets_mode-modecode,zmpets_range-rangeid,zmpets_servfacto-factor are column name of table control
READ TABLE int_factor INDEX tab_control-current_line.
IF sy-subrc = 0.
zmpets_mode-modecode = int_factor-modecode.
zmpets_range-rangeid = int_factor-rangeid.
zmpets_servfacto-factor = int_factor-factor.
ENDIF.
ENDMODULE. " move_data_to_table OUTPUT
*& Module move_data_from_table INPUT
Date is moved from the table control to the Internal Table
MODULE move_data_from_table INPUT.
To move the data from the table control to internal table 'INT_FACTOR'.
int_factor-modecode = zmpets_mode-modecode.
int_factor-rangeid = zmpets_range-rangeid.
int_factor-factor = zmpets_servfacto-factor.
int_factor-chk = line.
*here if the data is there, it will modify
MODIFY int_factor INDEX tab_control-current_line.
IF sy-subrc NE 0. "data not exixting in table control . ie new data, then append it
APPEND int_factor.
CLEAR int_factor.
ENDIF.
ENDMODULE. " move_data_from_table INPUT
*delete a line from table control
MODULE user_command_9010 INPUT.
CASE sy-ucomm.
When an entry is deleted, and the entry is removed from the table
control.
    WHEN 'DELETE'.
      PERFORM f_del_frm_tab_cntrl.
ENDCASE.
ENDMODULE.
FORM f_del_frm_tab_cntrl .
LOOP AT int_factor WHERE chk = 'X'.
    DELETE int_factor WHERE chk = 'X' .
    CONTINUE.
ENDLOOP.
CLEAR int_factor.
ENDFORM.
for any clarifiaction pls mail me.
pls reward points, if this helped u.
regards,
anversha.
[email protected]
Message was edited by: Anversha s

How to delete duplicate rows in oracle and retaining last duplicate rows

Hi,
I'm having millions of records in the table .Some duplicate values/rows are inserted in it.
I just want to delete duplicate rows but also want to retain the last duplicate row.
For eg if one record is found three times ,i want to delete first and second record and retain
the third one i.e the last inserted one.
Regards
Paramdeep Singh

user13310594 wrote:
Hi,
I'm having millions of records in the table .Some duplicate values/rows are inserted in it.
I just want to delete duplicate rows but also want to retain the last duplicate row.
For eg if one record is found three times ,i want to delete first and second record and retain
the third one i.e the last inserted one.Hi Paramdeep,
To start with, since you do not wish to keep multiple rows with same values, why allow them to get inserted in the first place?
Wouldn't it be easier to block duplicate rows from inserting by creating a Unique constraint on Column(s) that define a row as duplicate, then rather deleting duplicate rows periodically?
For deleting duplicate rows, there are N number of techniques available. Always remember, you need to have a rigid criteria that marks row as duplicate.
[url http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:15258974323143]this is one recomended by tom for large tables.
Vivek L

Deleting a row from matrix by context menu

Hi all
does anyone know how can i cause right click on mouse button. on a certain row within a matrix to show a context menu with the option to delete the row. and when pressing the menu item handling the event of deleting the row from the matrix?
appreciate the help
Yoav

Hi Yoav,
Simply, 'context menu' have to be handled with 'menu event' object.
It can be done by 'flushToDataSource' method and some tricks.
Basically, method delete the row without any clause of addon code.
But it's only can be done in display side.
If you're using DBDataSource, you have to flush to the datasource.
I mean, you have to update datasource with the data displayed in the matrix.
and then, delete the last row of the datasource.
FlushToDataSource doesn't affect to the number of rows in the datasource.
You have to delete a row with a method of DBDatasource.. I can't remember the name.
If, the matrix uses userdatasource, you don't need to delete a row in datasource.
Because userdatasource doesn't have a concept of 'row', actually.
Hope this helpful for you.
Regards,
Hyunil Choi

Deleting a row from a Parent VO gives NullPointerException

I am using JDev 11.1.1.2.0
Deleting a row from a Parent VO gives NullPointerException raised from oracle.jbo.server.EntityImpl.vetoRemoveWithDetails(EntityImpl.java:8214)
Here is my implementation:
There are two Entity Objects(Named "Parent" and "Child").
Both EO are NOT based on a database table. (These are populated from a method in the AM, the method calls a database API that returns an nested array and this array is used to populate the Parent and Child entities)
All attributes in these entity objects are Non-persistent.
The View Object "ParentEv" is based on "Parent" EO
The View Object "ChildEv" is based on "Child" EO
The View Objects "ParentEv" and "ChildEv" are linked by a view link.
The Entities "Parent" and"Child" are linked by Entity Association ( as "Composition Association" with "Implement Cascade Delete" checked.)
I am programatically deleting and populating the View Objects ParentEv and ChildEv from a method in the AM.
The first time I execute the method in BC Tester, it works fine.
The second time I execute the method it works fine.
But on third execution, it gives the below error which seems to be NullPointerException raised from oracle.jbo.server.EntityImpl.vetoRemoveWithDetails(EntityImpl.java:8214)
I am able to reproduce this in a test case scenario. It always works the first 2 times and fails when the method to delete and populate the VOs is executed a 3rd time.
If we base the "Parent" and "Child" entities on some dummy database views, it works fine, the problem only occurs when the Entities are NOT based on any table.
Can someone advise on what could be causing this issue?
Thanks,
Mitesh.

Here's the method that I use in my test case to populate the VOs.
   * This method populates the VOs ParentEv and ChildEv.
   * These VOs are based on EOs Paren and Child, respectively.
   * Before populating the VOs I am deleting any existing rows.
   * The first two times this method is executed, it works fine.
   * The third time this method executes it gives a nullpointerexception raised from
   * oracle.jbo.server.EntityImpl.vetoRemoveWithDetails(EntityImpl.java:8214)
public void populateMethod(){
    int rowCount = getParentEv().getRowCount();
    for (int i = 0; i < rowCount; i++) {
         Row row = getParentEv().last();
         if(row!=null)
           row.remove();
    rowCount = getChildEv().getRowCount();
    for (int i = 0; i < rowCount; i++) {
     Row row = getChildEv().last();
     if(row!=null)
       row.remove();
    int k = 0;
    for (int i = 1; i < 5; i++) {
      ParentEvRowImpl parentEvRow = (ParentEvRowImpl)getParentEv().createRow();
      parentEvRow.setParentPk("Parent " + i);
      parentEvRow.setParentDesc("Parent Desc " + i);
      getParentEv().insertRow(parentEvRow);
      for (int j = 1; j < 5; j++) {
     k++;
     ChildEvRowImpl childEvRow = (ChildEvRowImpl)getChildEv().createRow();
     childEvRow.setChildPk("Child " + k);
     childEvRow.setChildDesc("Child Desc " + k);
     getChildEv().insertRow(childEvRow);
}==============================================================================
Here is the Parent.xml for the Parent EO:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE Entity SYSTEM "jbo_03_01.dtd">

<Entity
xmlns="http://xmlns.oracle.com/bc4j"
Name="Parent"
Version="11.1.1.55.36"
AliasName="Parent"
BindingStyle="OracleName"
UseGlueCode="false"
RowClass="oracle.jbo.server.EntityImpl"
DefClass="oracle.jbo.server.EntityDefImpl"
CollClass="oracle.jbo.server.EntityCache">
<DesignTime>
    <AttrArray Name="_publishEvents"/>
</DesignTime>
<Attribute
    Name="ParentPk"
    IsQueriable="false"
    IsPersistent="false"
    ColumnName="PARENTPK"
    SQLType="VARCHAR"
    Type="java.lang.String"
    ColumnType="$none$"
    PrimaryKey="true"/>
<Attribute
    Name="ParentDesc"
    IsQueriable="false"
    IsPersistent="false"
    ColumnName="$none$"
    SQLType="VARCHAR"
    Type="java.lang.String"
    ColumnType="$none$"/>
<AccessorAttribute
    Name="Child"
    Association="model.eo.ea.ChildParentAssoc"
    AssociationEnd="model.eo.ea.ChildParentAssoc.Child"
    AssociationOtherEnd="model.eo.ea.ChildParentAssoc.Parent"
    Type="oracle.jbo.RowIterator"
    IsUpdateable="false"/>
</Entity>==============================================================================
Here is the Child.xml for the Child EO:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE Entity SYSTEM "jbo_03_01.dtd">

<Entity
xmlns="http://xmlns.oracle.com/bc4j"
Name="Child"
Version="11.1.1.55.36"
AliasName="Child"
BindingStyle="OracleName"
UseGlueCode="false">
<DesignTime>
    <AttrArray Name="_publishEvents"/>
</DesignTime>
<Attribute
    Name="ChildPk"
    IsUpdateable="while_insert"
    IsQueriable="false"
    IsPersistent="false"
    IsNotNull="true"
    ColumnName="CHILDPK"
    SQLType="VARCHAR"
    Type="java.lang.String"
    ColumnType="$none$"
    PrimaryKey="true"/>
<Attribute
    Name="ChildDesc"
    IsQueriable="false"
    IsPersistent="false"
    ColumnName="$none$"
    SQLType="VARCHAR"
    Type="java.lang.String"
    ColumnType="$none$"/>
<Attribute
    Name="ParentPk"
    IsQueriable="false"
    IsPersistent="false"
    IsNotNull="true"
    ColumnName="$none$"
    SQLType="VARCHAR"
    Type="java.lang.String"
    ColumnType="$none$"/>
</Entity>==============================================================================
Here is the ChildParentAssoc.xml for the Association between Parent and Child EOs:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE Association SYSTEM "jbo_03_01.dtd">

<Association
xmlns="http://xmlns.oracle.com/bc4j"
Name="ChildParentAssoc"
Version="11.1.1.55.36">
<DesignTime>
    <Attr Name="_isCodegen" Value="true"/>
</DesignTime>
<AssociationEnd
    Name="Parent"
    Cardinality="1"
    Source="true"
    Owner="model.eo.Parent"
    DeleteContainee="true"
    LockLevel="NONE"
    ExposedAccessor="false">
    <DesignTime>
      <Attr Name="_aggregation" Value="0"/>
      <Attr Name="_finderName" Value="Parent"/>
      <Attr Name="_isUpdateable" Value="true"/>
      <Attr Name="_minCardinality" Value="1"/>
    </DesignTime>
    <AttrArray Name="Attributes">
      <Item Value="model.eo.Parent.ParentPk"/>
    </AttrArray>
</AssociationEnd>
<AssociationEnd
    Name="Child"
    Cardinality="-1"
    Owner="model.eo.Child"
    HasOwner="true">
    <DesignTime>
      <Attr Name="_aggregation" Value="0"/>
      <Attr Name="_finderName" Value="Child"/>
      <Attr Name="_isUpdateable" Value="true"/>
    </DesignTime>
    <AttrArray Name="Attributes">
      <Item Value="model.eo.Child.ParentPk"/>
    </AttrArray>
</AssociationEnd>
</Association>==============================================================================
Here is the ParentEv.xml for the ParentEv VO:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE ViewObject SYSTEM "jbo_03_01.dtd">

<ViewObject
xmlns="http://xmlns.oracle.com/bc4j"
Name="ParentEv"
Version="11.1.1.55.36"
BindingStyle="OracleName"
CustomQuery="true"
RowClass="model.vo.ev.ParentEvRowImpl"
ComponentClass="model.vo.ev.ParentEvImpl"
PageIterMode="Full"
UseGlueCode="false">
<DesignTime>
    <Attr Name="_codeGenFlag2" Value="Access|Coll"/>
    <Attr Name="_isExpertMode" Value="true"/>
    <Attr Name="_isCodegen" Value="true"/>
</DesignTime>
<EntityUsage
    Name="Parent"
    Entity="model.eo.Parent"/>
<ViewAttribute
    Name="ParentDesc"
    IsSelected="false"
    IsQueriable="false"
    IsPersistent="false"
    PrecisionRule="true"
    Precision="255"
    EntityAttrName="ParentDesc"
    EntityUsage="Parent"
    AliasName="PARENTDESC"/>
<ViewAttribute
    Name="ParentPk"
    IsQueriable="false"
    IsPersistent="false"
    PrecisionRule="true"
    EntityAttrName="ParentPk"
    EntityUsage="Parent"/>
<ViewLinkAccessor
    Name="ChildEv"
    ViewLink="model.vo.vl.ChildEvParentEvVl"
    Type="oracle.jbo.RowIterator"
    IsUpdateable="false"/>
</ViewObject>==============================================================================
Here is the ChildEv.xml for the ChildEv VO:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE ViewObject SYSTEM "jbo_03_01.dtd">

<ViewObject
xmlns="http://xmlns.oracle.com/bc4j"
Name="ChildEv"
Version="11.1.1.55.36"
BindingStyle="OracleName"
CustomQuery="true"
RowClass="model.vo.ev.ChildEvRowImpl"
ComponentClass="model.vo.ev.ChildEvImpl"
PageIterMode="Full"
UseGlueCode="false">
<DesignTime>
    <Attr Name="_codeGenFlag2" Value="Access|Coll"/>
    <Attr Name="_isExpertMode" Value="true"/>
    <Attr Name="_isCodegen" Value="true"/>
</DesignTime>
<EntityUsage
    Name="Child"
    Entity="model.eo.Child"/>
<ViewAttribute
    Name="ChildDesc"
    IsSelected="false"
    IsQueriable="false"
    IsPersistent="false"
    PrecisionRule="true"
    Precision="255"
    EntityAttrName="ChildDesc"
    EntityUsage="Child"
    AliasName="CHILDDESC"/>
<ViewAttribute
    Name="ChildPk"
    IsUpdateable="while_insert"
    IsQueriable="false"
    IsPersistent="false"
    IsNotNull="true"
    PrecisionRule="true"
    EntityAttrName="ChildPk"
    EntityUsage="Child"/>
<ViewAttribute
    Name="ParentPk"
    IsQueriable="false"
    IsPersistent="false"
    IsNotNull="true"
    PrecisionRule="true"
    EntityAttrName="ParentPk"
    EntityUsage="Child"/>
</ViewObject>==============================================================================
Here is the ChildEvParentEvVl.xml for the view link between ParentEv and ChildEv VOs:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE ViewLink SYSTEM "jbo_03_01.dtd">

<ViewLink
xmlns="http://xmlns.oracle.com/bc4j"
Name="ChildEvParentEvVl"
Version="11.1.1.55.36">
<DesignTime>
    <Attr Name="_isCodegen" Value="true"/>
</DesignTime>
<ViewLinkDefEnd
    Name="ParentEv"
    Cardinality="1"
    Owner="model.vo.ev.ParentEv"
    Source="true">
    <DesignTime>
      <Attr Name="_finderName" Value="ParentEv"/>
      <Attr Name="_isUpdateable" Value="true"/>
    </DesignTime>
    <AttrArray Name="Attributes">
      <Item Value="model.vo.ev.ParentEv.ParentPk"/>
    </AttrArray>
</ViewLinkDefEnd>
<ViewLinkDefEnd
    Name="ChildEv"
    Cardinality="-1"
    Owner="model.vo.ev.ChildEv">
    <DesignTime>
      <Attr Name="_finderName" Value="ChildEv"/>
      <Attr Name="_isUpdateable" Value="true"/>
    </DesignTime>
    <AttrArray Name="Attributes">
      <Item Value="model.vo.ev.ChildEv.ParentPk"/>
    </AttrArray>
</ViewLinkDefEnd>
</ViewLink>

Deleting a row from a table containing CLOB as one of the columns

When i delete a row from a table which contains a CLOB (internal clob) i.e. CLOB or BLOB column, Will the CLOB data will also be deleted ? I understand that what exactly stored in the CLOB column is the clob locator which points to the actual data.
So, when I delete this row, the clob locator will be deleted, but will the actual data what this locator is pointing to is also deleted ??? if not what is the process to delete the data the locator is pointing to when the row containing the locator is deleted ? If this is not happening then the actual data might become an orphan data which nobody has access to, will automatic garbage cleaning occurs on a frequent intravels to delete unaddressed data residing on the database server ?
Thanks in advance for the help, can email me at [email protected] alternatively.
Regards,
Srinivasa C.

Michael,
Thanks very much for your inputs, here are the results i got when i tried the way you explained in your answer, the TRUNCATE command made the actual size back to normal, but the delete is not the same, so, how can i delete the data that a particular clob locator may point to ?
truncate would delete all the rows of the table, which might not serve my purpose, i would like to delete a row and also it's associated clob data from the database! is there anyway to do this ?
is there any limitation on the ool_sample size? i am basically a c++ programmer, i am looking for some function like FREE which would free the allocated memory to the clob once the locator is deleted.
your help is greatly appreciated - Thanks!
:-) Srini.
==========================
My Results:
==========================
SQL> create table sample (
2 id integer primary key,
3 the_data CLOB default empty_clob() )
4 lob (the_data) store as ool_sample;
Table created.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
20K
SAMPLE
10K
SQL> select count(*) from sample;
COUNT(*)
0
SQL> begin
2 for i in 1..1000
3 loop
4 insert into sample values (i, RPAD('some data', 4000) );
5 end loop;
6 end;
7 /
PL/SQL procedure successfully completed.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
6420K
SAMPLE
70K
SQL> delete sample;
1000 rows deleted.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
6420K
SAMPLE
70K
SQL> commit;
Commit complete.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
6420K
SAMPLE
70K
SQL> begin
2 for i in 1..1000
3 loop
4 insert into sample values (i, rpad('some data', 4000));
5 end loop;
6 end;
7 /
PL/SQL procedure successfully completed.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
9616K
SAMPLE
70K
SQL> truncate table sample;
Table truncated.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
20K
SAMPLE
10K

Delete empty rows while having empty xml tag

I've seen something like same but it doesn't work for me. I have a table which is created using xml rules, some time it contains empty xml tag also converted into row but I don't want these empty rows. After table creation empty rows need to be deleted.
I've got this script from this forum which delete empty rows
for(var i=myDocument.textFrames.length-1; i>=0; i--){
for(var j=myDocument.textFrames[i].tables.length-1; j>=0; j--){
   for(var k=myDocument.textFrames[i].tables[j].rows.length-1; k>=0; k--){
    myContents = 0;
    for(var l=myDocument.textFrames[i].tables[j].rows[k].cells.length-1; l>=0; l--){
     if (myDocument.textFrames[i].tables[j].rows[k].cells[l].contents != "") myContents++;
     if (myContents == 0) myDocument.textFrames[i].tables[j].rows[k].remove();
but incase of any cell contains empty xml element it goes blank. Could any one help on this.
Thanks
Mac

Gyan,
Thanks for your help. I have modified the code as below:
public void removeblankline()
OAViewObject rvo = (OAViewObject)findViewObject("NCRPaymentExtLineVO1");
Row row[] = rvo.getAllRowsInRange();
System.out.println("Remove all blank rows");
System.out.println("Total Rows"+rvo.getRowCount());
int jcount = rvo.getRowCount();
for (int j=0;j< jcount;j++)
NCRPaymentExtLineVORowImpl rowj = (NCRPaymentExtLineVORowImpl)row[j];
System.out.println("Check Line Number: "+j);
System.out.println("Line Type Lookup Code: "+rowj.getLineTypeLookupCode());
if((rowj.getLineTypeLookupCode()==null)||("".equals(rowj.getLineTypeLookupCode().trim())))
System.out.println("Removed Line Number: "+j);
rowj.remove();
System.out.println("Processed with Line Number: "+j);
} // end removeblankline
This is the change I have done:
int jcount = rvo.getRowCount();

Problem of deletion of rows in jtable, table refreshing too

Hi,
I have a table with empty rows in the beginning with some custom properties( columns have fixed width...), later user would be adding to the rows to this table and can delete, I've a problem while deleting the rows from table,
When a selected row is deleted the model is also deleting the data but the table(view) is not refreshed.
Actually i'm selecting a cell of a row, then hitting the delete button.
So the model is deleting the information, but i'm not able to c the fresh data in table( especially when the last cell of last row is selectd and hit the delete button, i am getting lots of exception)
Kindly copy the below code and execute it, and let me know,
* AuditPanel.java
* Created on August 30, 2002, 3:05 AM
import javax.swing.*;
import java.awt.*;
import javax.swing.table.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.util.Vector;
* @author yaman
public class AuditPanel extends javax.swing.JPanel {
// These are the combobox values
private String[] acceptenceOptions;
private Vector colNames;
private Color rowSelectionBackground = Color.yellow;
private int rowHeight = 20;
private int column0Width =70;
private int column1Width =96;
private int column2Width =327;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
/** Creates new form AuditPanel */
public AuditPanel() {
public void renderPanel(){
initComponents();
public String[] getAcceptenceOptions(){
return acceptenceOptions;
public void setAcceptenceOptions(String[] acceptenceOptions){
this.acceptenceOptions = acceptenceOptions;
public Vector getColumnNames(){
return colNames;
public void setColumnNames(Vector colNames){
this.colNames = colNames;
public Vector getData(){
Vector dataVector = new Vector();
/*dataVector.add(null);
dataVector.add(null);
dataVector.add(null);
return dataVector;
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
private void initComponents() {
java.awt.GridBagConstraints gridBagConstraints;
jPanel2 = new javax.swing.JPanel();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jPanel1 = new javax.swing.JPanel();
jTable1 = new javax.swing.JTable();
setLayout(new java.awt.GridBagLayout());
setBorder(new javax.swing.border.EmptyBorder(0,0,0,0));
jPanel2.setLayout(new java.awt.GridBagLayout());
jPanel2.setBorder(new javax.swing.border.EmptyBorder(0,0,0,0));
jButton1.setText("Add");
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
gridBagConstraints.ipadx = 8;
gridBagConstraints.insets = new java.awt.Insets(0, 1, 5, 0);
gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
jPanel2.add(jButton1, gridBagConstraints);
jButton2.setText("Delete");
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 1;
gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
jPanel2.add(jButton2, gridBagConstraints);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 2;
gridBagConstraints.gridy = 0;
gridBagConstraints.insets = new java.awt.Insets(0, 5, 0, 0);
gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTH;
add(jPanel2, gridBagConstraints);
jPanel1.setLayout(new java.awt.GridBagLayout());
jPanel1.setBorder(new javax.swing.border.BevelBorder(javax.swing.border.BevelBorder.LOWERED, Color.black, Color.gray) );
jTable1.setModel(new javax.swing.table.DefaultTableModel(getData(), getColumnNames()));
// get all the columns and set the column required properties
java.util.Enumeration enum = jTable1.getColumnModel().getColumns();
while (enum.hasMoreElements()) {
TableColumn column = (TableColumn)enum.nextElement();
if( column.getModelIndex() == 0 ) {
column.setPreferredWidth(column0Width);
column.setCellEditor( new ValidateCellDataEditor(true) );
if( column.getModelIndex() == 1) {
column.setPreferredWidth(column1Width);
column.setCellEditor(new AcceptenceComboBoxEditor(getAcceptenceOptions()));
// If the cell should appear like a combobox in its
// non-editing state, also set the combobox renderer
//column.setCellRenderer(new AcceptenceComboBoxRenderer(getAcceptenceOptions()));
if( column.getModelIndex() == 2 ) {
column.setPreferredWidth(column2Width); // width of column
column.setCellEditor( new ValidateCellDataEditor(false) );
jScrollPane1 = new javax.swing.JScrollPane(jTable1);
jScrollPane1.setPreferredSize(new java.awt.Dimension(480, 280));
jTable1.setMinimumSize(new java.awt.Dimension(60, 70));
//jTable1.setPreferredSize(new java.awt.Dimension(300, 70));
//jScrollPane1.setViewportView(jTable1);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTH;
jPanel1.add(jScrollPane1, gridBagConstraints);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 0;
add(jPanel1, gridBagConstraints);
// set the row height
jTable1.setRowHeight(rowHeight);
// set selection color
jTable1.setSelectionBackground(rowSelectionBackground);
// set the single selection
jTable1.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
// avoid table header to resize/ rearrange
jTable1.getTableHeader().setReorderingAllowed(false);
jTable1.getTableHeader().setResizingAllowed(false);
// Table header font
jTable1.getTableHeader().setFont( new Font( jTable1.getFont().getName(),Font.BOLD,jTable1.getFont().getSize() ) );
jButton1.setMnemonic(KeyEvent.VK_A);
// action of add button
jButton1.addActionListener( new ActionListener(){
public void actionPerformed(ActionEvent actionEvent){
// If a button press is the trigger to leave a JTable cell and save the data in model
if(jTable1.isEditing() ){
//System.out.println("table is edition ");
String text=((javax.swing.text.JTextComponent)jTable1.getEditorComponent()).getText();
jTable1.setValueAt(text,jTable1.getSelectedRow(),jTable1.getSelectedColumn()) ;
jTable1.getCellEditor().cancelCellEditing();
// find out total available rows
int totalRows = jTable1.getRowCount();
int cols = jTable1.getModel().getColumnCount();
if( jTable1.getModel() instanceof DefaultTableModel ) {
((DefaultTableModel)jTable1.getModel()).addRow(new Object[cols]);
int newRowCount = jTable1.getRowCount();
// select the first row
jTable1.getSelectionModel().setSelectionInterval(newRowCount-1,newRowCount-1);
jButton2.setMnemonic(KeyEvent.VK_D);
// action of Delete button
jButton2.addActionListener( new ActionListener(){
public void actionPerformed(ActionEvent actionEvent){
int totalRows = jTable1.getRowCount();
// If there are more than one row in table then delete it
if( totalRows > 0){
int selectedOption = JOptionPane.showConfirmDialog(null,"Are you sure you want to delete this audit row?","Coeus", JOptionPane.YES_NO_OPTION);
// if Yes then selectedOption is 0
// if No then selectedOption is 1
if(0 == selectedOption ){
// get the selected row
int selectedRow = jTable1.getSelectedRow();
System.out.println("Selected Row "+selectedRow);
if( selectedRow != -1 ){
DefaultTableModel dm= (DefaultTableModel)jTable1.getModel();
java.util.Vector v1=dm.getDataVector();
System.out.println("BEFOE "+v1);
v1.remove(selectedRow);
jTable1.removeRowSelectionInterval(selectedRow,selectedRow);
System.out.println("After "+v1);
}else{
// show the error message
JOptionPane.showMessageDialog(null, "Please Select an audit Row", "Coeus", JOptionPane.ERROR_MESSAGE);
} // end of initcomponents
class AcceptenceComboBoxRenderer extends JComboBox implements TableCellRenderer {
public AcceptenceComboBoxRenderer(String[] items) {
super(items);
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
if (isSelected) {
setForeground(table.getSelectionForeground());
super.setBackground(rowSelectionBackground);
} else {
setForeground(table.getForeground());
setBackground(table.getBackground());
// Select the current value
setSelectedItem(value);
return this;
class AcceptenceComboBoxEditor extends DefaultCellEditor {
public AcceptenceComboBoxEditor(String[] items) {
super(new JComboBox(items));
} // end editor class
public class ValidateCellDataEditor extends AbstractCellEditor implements TableCellEditor {
// This is the component that will handle the editing of the
// cell value
JComponent component = new JTextField();
boolean validate;
public ValidateCellDataEditor(boolean validate){
this.validate = validate;
// This method is called when a cell value is edited by the user.
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int rowIndex, int vColIndex) {
if (isSelected) {
component.setBackground(rowSelectionBackground);
// Configure the component with the specified value
JTextField tfield =(JTextField)component;
// if any vaidations to be done for this cell
if(validate){
//tfield.setDocument(new JTextFieldFilter(JTextFieldFilter.NUMERIC,4));
tfield.setText( ((String)value));
// Return the configured component
return component;
// This method is called when editing is completed.
// It must return the new value to be stored in the cell.
public Object getCellEditorValue() {
return ((JTextField)component).getText();
// This method is called just before the cell value
// is saved. If the value is not valid, false should be returned.
public boolean stopCellEditing() {
String s = (String)getCellEditorValue();
return super.stopCellEditing();
public void itemStateChanged(ItemEvent e) {
super.fireEditingStopped();
}//end of ValidateCellDataEditor class
public static void main(String args[]){
JFrame frame = new JFrame();
AuditPanel auditPanel = new AuditPanel();
frame.getContentPane().add(auditPanel);
auditPanel.setAcceptenceOptions(new String[]{"Accepted", "Rejected", "Requested"} );
java.util.Vector colVector = new java.util.Vector();
colVector.add("Fiscal Year");
colVector.add("Audit Accepted");
colVector.add("Comment" );
auditPanel.setColumnNames( colVector);
auditPanel.renderPanel();
frame.pack();
frame.show();

Hi,
I've got the solution for it. As when the cursor is in cell of
a row and hit the delete button, the data in that cell is not saved,
So i'm trying to save the data first into the model then firing the action event by doing this ..
jButton2.addActionListener( new ActionListener(){
public void actionPerformed(ActionEvent actionEvent){
// If a button press is the trigger to leave a JTable cell and save the data in model
if(jTable1.isEditing() ){
String text=((javax.swing.text.JTextComponent)jTable1.getEditorComponent()).getText();
jTable1.setValueAt(text,jTable1.getSelectedRow(),jTable1.getSelectedColumn()) ;
jTable1.getCellEditor().cancelCellEditing();
// HERE DO THE DELETE ROW OPERATION
<yaman/>

Deleting some rows

Similar Messages

Maybe you are looking for