Error when adding Foreign Key

Hi,
Problem:
When trying to add a Foreign Key via Edit Table | Foreign Key tab an error is thrown
Error:
"ORA-00942: table or view does not exit", Vendor code 942
SQL Developer Generated DDL:
ALTER TABLE "CNArticlesCODES"
DROP CONSTRAINT "CNArticlesCODES_FK1"
ALTER TABLE "CNArticlesCODES"
ADD CONSTRAINT "CNArticlesCODES_FK1" FOREIGN KEY
"ID"
) REFERENCES CNArticlesDATA
"ID"
) ENABLE
My work around:
table name next to REFERENCES command in double quotes
ALTER TABLE "CNArticlesCODES"
ADD CONSTRAINT "CNArticlesCODES_FK1" FOREIGN KEY
"UID"
) REFERENCES "CNArticlesCODES"
"UID"
) ENABLE
SQL Developer 1.0.0.15.57 on Windows XP SP2
Oracle Database 10g Enterprise Edition Release 10.2.0.10 (Eval Lic) on Windows 2003 Web Edition 32 bit
The 2 tables in this example where generated by MS DTS tool while importing data. This issue is not present when performing the above action on 2 tables generated using SQL Developer.
I'm no database expert and new to Oracle (R&D stage of SQL Server to Oracle migration). So can some body tell me/point me at docs that explains what's going on here with the table names.
Thanks

Hopefully someone from oracle will see this and log it as a bug. If that doesn't happen and you have a support license, you can open up a ticket with them directly.
As an aside.. if you are daring enough, the template for that is stored in one of the jars in an xml file. You can always edit it and add the quotes. Or..and you don't want to hear this.. you may want to rename everything to uppercase. It would hurt now, but could end up saving you time down the road. (adding quotes to every query is a pain)
Eric

Similar Messages

Error when sorting foreign key fields in a view

Hello all
I created a view and links to other views, and then created a table. In the table I put different attributes from the view and the views it is linked to. When I click the sort ascending or descending button in a column attribute that is in the original view, everything works fine. However if I click the same arrow button for a different column, one that is in a linked view, I get this error message.
Definition OnlineTerminalId of type Attribute is not found in ObjektiView1.
I do not understand why this does not work. It shows the values inside these linked views just fine. I did change names of some attributes in the database but I had the problem before then, and after I changed them all back so I doubt that is the issue.
If anyone can help I would be much obliged

Dino2dy wrote:
Hmm, what I did is slightly different, but what my way does is give me the ability to create forms that change automatically when I click a row in a table, which I thought would be useful. I could do it your way too but I would have to do everything again from the beginning, which is something I am trying to avoid. There should be a way to fix this problem this way, as it would be kind of stupid to be able to show the data in the table but just not be able to sort or filter by it.You can still accomplish this by relating the combined VO with your children VOs using View Links, same as what you are doing now.
Also that view would be HUGE as it is a single table that is connected to a lot of other tables via foreign keys, so my single view would cover 10 tables.Not necessarily. You don't have to include all Entities in your combined VO - just those that you want their attributes displayed on your table.
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Ora-2270 Error while adding foreign key constraint on top a view

While adding a constraint, referencing a foreign key column from a view raises error. However, it works fine over a table.
Here's the sample script:
create table t_temp (
sample_id number,
text varchar2(40))
alter table t_temp add constraint temp_pk
primary key (sample_id);
create view tempvw as select sample_id,text from t_temp;
create table t_sample (
uniq_id number,
sample_id number,
sample_text varchar(40));
=========
ALTER TABLE t_sample ADD CONSTRAINT FK_sample_temp
     FOREIGN KEY (sample_id) REFERENCES t_temp (sample_id);
This works fine.
=========
==============
The following raises ERROR....
ALTER TABLE t_sample ADD CONSTRAINT FK_sample_temp1
     FOREIGN KEY (sample_id) REFERENCES tempvw (sample_id);
Error starting at line 1 in command:
ALTER TABLE t_sample ADD CONSTRAINT FK_sample_temp1
     FOREIGN KEY (sample_id) REFERENCES tempvw (sample_id)
Error report:
SQL Error: ORA-02270: no matching unique or primary key for this column-list
02270. 00000 - "no matching unique or primary key for this column-list"
*Cause:    A REFERENCES clause in a CREATE/ALTER TABLE statement
gives a column-list for which there is no matching unique or primary
key constraint in the referenced table.
*Action:   Find the correct column names using the ALL_CONS_COLUMNS
catalog view

What exactly are you trying to accomplish by having a
referential integrity constraint on a view (which is
not allowed). PKs and FKs are allowed on views. DISABLE NOVALIDATE is the only allowed state for them. View constraints are used for query rewriting: http://download.oracle.com/docs/cd/B19306_01/server.102/b14223/qradv.htm#sthref1457
Regards,
Dima

Error when adding forigen key (table or view does not exist)

Hi
i write the foreign key name and select the the table from the combo and also the field and click apply it gives me error message says :-
error table or view does not exist vendor code 942
any help?
thanks in advance.
.

There is only an issue with this if your table has to be enclosed in double quotes. i.e. If you have mixed case table names. In that case, instead of using the context menu (right click on Table) Constraint -> Add Foreign Key, you should use the Edit... table dialog.
We did have a bug logged for this, but the instance for using the Create foreign key dialog has not been fixed. I have reopened the bug.
Sue

Error when adding a partition to a materlialized view

Hi,
I am getting this error when adding a partition to a materialized view.
ALTER MATERIALIZED VIEW mvedw.MV_CLM_CAPITN_F ADD PARTITION MAR2013 VALUES LESS THAN ('201304')
ERROR at line 1:
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Please advise.
Regards,
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SQL> select TABLE_OWNER,TABLE_NAME,PARTITION_NAME,HIGH_VALUE from dba_tab_partitions where table_name =
'MV_CLM_CAPITN_F' order by PARTITION_NAME 2
3 ;
TABLE_OWNER TABLE_NAME PARTITION_NAME HIGH_VALUE
MVEDW MV_CLM_CAPITN_F APR2009 '200905'
MVEDW MV_CLM_CAPITN_F APR2010 '201005'
MVEDW MV_CLM_CAPITN_F APR2011 '201105'
MVEDW MV_CLM_CAPITN_F APR2012 '201205'
MVEDW MV_CLM_CAPITN_F AUG2009 '200909'
MVEDW MV_CLM_CAPITN_F AUG2010 '201009'
MVEDW MV_CLM_CAPITN_F AUG2011 '201109'
MVEDW MV_CLM_CAPITN_F AUG2012 '201209'
MVEDW MV_CLM_CAPITN_F DEC2008 '200901'
MVEDW MV_CLM_CAPITN_F DEC2009 '201001'
MVEDW MV_CLM_CAPITN_F DEC2010 '201101'
TABLE_OWNER TABLE_NAME PARTITION_NAME HIGH_VALUE
MVEDW MV_CLM_CAPITN_F DEC2012 '201301'
MVEDW MV_CLM_CAPITN_F FEB2009 '200903'
MVEDW MV_CLM_CAPITN_F FEB2010 '201003'
MVEDW MV_CLM_CAPITN_F FEB2011 '201103'
MVEDW MV_CLM_CAPITN_F FEB2012 '201203'
MVEDW MV_CLM_CAPITN_F FEB2013 '201303'
MVEDW MV_CLM_CAPITN_F JAN2009 '200902'
MVEDW MV_CLM_CAPITN_F JAN2010 '201002'
MVEDW MV_CLM_CAPITN_F JAN2011 '201102'
MVEDW MV_CLM_CAPITN_F JAN2012 '201202'
MVEDW MV_CLM_CAPITN_F JAN2013 '201302'
TABLE_OWNER TABLE_NAME PARTITION_NAME HIGH_VALUE
MVEDW MV_CLM_CAPITN_F JUL2009 '200908'
MVEDW MV_CLM_CAPITN_F JUL2010 '201008'
MVEDW MV_CLM_CAPITN_F JUL2011 '201108'
MVEDW MV_CLM_CAPITN_F JUL2012 '201208'
MVEDW MV_CLM_CAPITN_F JUN2009 '200907'
MVEDW MV_CLM_CAPITN_F JUN2010 '201007'
MVEDW MV_CLM_CAPITN_F JUN2011 '201107'
MVEDW MV_CLM_CAPITN_F JUN2012 '201207'
MVEDW MV_CLM_CAPITN_F MAR2009 '200904'
MVEDW MV_CLM_CAPITN_F MAR2010 '201004'
MVEDW MV_CLM_CAPITN_F MAR2011 '201104'
TABLE_OWNER TABLE_NAME PARTITION_NAME HIGH_VALUE
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MVEDW MV_CLM_CAPITN_F MAR2013 '201304'
MVEDW MV_CLM_CAPITN_F MAY2009 '200906'
MVEDW MV_CLM_CAPITN_F MAY2010 '201006'
MVEDW MV_CLM_CAPITN_F MAY2011 '201106'
MVEDW MV_CLM_CAPITN_F NOV2009 '200912'
MVEDW MV_CLM_CAPITN_F NOV2010 '201012'
MVEDW MV_CLM_CAPITN_F NOV2012 '201212'
MVEDW MV_CLM_CAPITN_F OCT2009 '200911'
MVEDW MV_CLM_CAPITN_F OCT2010 '201011'
MVEDW MV_CLM_CAPITN_F OCT2011 '201111'
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MVEDW MV_CLM_CAPITN_F SEP2009 '200910'
MVEDW MV_CLM_CAPITN_F SEP2010 '201010'
MVEDW MV_CLM_CAPITN_F SEP2011 '201110'
MVEDW MV_CLM_CAPITN_F SEP2012 '201210'
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Regards,
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Dbms_crypto - avoid error when using different key in lower environment

Hello Experts,
We are using Oracle 11.2.0.2. We are planning to implement dbms_crypto to encrypt few columns. We clone the data from production to lower environment ( DEV, QC).
For the lower environments, we do not want to get the sensitive data from production and do not plan to use same key. Rather than getting an error when using differnt key, is it possible to get a different resultset back.
In other words, we want the implementation to be same across environments but want to use a diffent key in lower environment and get different result (or garbage).
Any suggestions would be greatly appreciated.
While testing this logic, I am getting following error when using differnt key to decrypt. It works fine if I use same key.
Error at line 1
ORA-28817: PL/SQL function returned an error.
ORA-06512: at "SYS.DBMS_CRYPTO_FFI", line 67
ORA-06512: at "SYS.DBMS_CRYPTO", line 44
ORA-06512: at line 19
DECLARE
l_credit_card_no    VARCHAR2(19) := '1234 5678 9012 3456';
l_ccn_raw           RAW(128) := UTL_RAW.cast_to_raw(l_credit_card_no);
l_key               RAW(128) := UTL_RAW.cast_to_raw('abcdefgh');
   l2_key               RAW(128) := UTL_RAW.cast_to_raw('12345678');
l_encrypted_raw     RAW(2048);
l_decrypted_raw     RAW(2048);
BEGIN
DBMS_OUTPUT.put_line('Original : ' || l_credit_card_no);
l_encrypted_raw := DBMS_CRYPTO.encrypt(src => l_ccn_raw,
                                         typ => DBMS_CRYPTO.des_cbc_pkcs5,
                                         key => l_key);
DBMS_OUTPUT.put_line('Encrypted : ' || RAWTOHEX(UTL_RAW.cast_to_raw(l_encrypted_raw)));
l_decrypted_raw := DBMS_CRYPTO.decrypt(src => l_encrypted_raw,
                                         typ => DBMS_CRYPTO.des_cbc_pkcs5,
                                         key => l2_key); --**Using different key to decrypt
DBMS_OUTPUT.put_line('Decrypted : ' || UTL_RAW.cast_to_varchar2(l_decrypted_raw));
END;Thank you.

If I understand what you are trying to do ... and I may not ... it is not going to work.
SQL> DECLARE
2   l_credit_card_no VARCHAR2(19) := '1612-1791-1809-2605';
3   l_ccn_raw RAW(128) := utl_raw.cast_to_raw(l_credit_card_no);
4   l_key1     RAW(128) := utl_raw.cast_to_raw('abcdefgh');
5   l_key2     RAW(128) := utl_raw.cast_to_raw('zyxwvuts'); -- alternate key used to attempt a different decryption
6
7   l_encrypted_raw RAW(2048);
8   l_decrypted_raw RAW(2048);
9 BEGIN
10    dbms_output.put_line('Original : ' || l_credit_card_no);
11
12    l_encrypted_raw := dbms_crypto.encrypt(l_ccn_raw, dbms_crypto.des_cbc_pkcs5, l_key1);
13
14    dbms_output.put_line('Encrypted : ' || RAWTOHEX(utl_raw.cast_to_raw(l_encrypted_raw)));
15
16    l_decrypted_raw := dbms_crypto.decrypt(src => l_encrypted_raw, typ => dbms_crypto.des_cbc_pkc
s5, key => l_key1);
17
18    dbms_output.put_line('Key1 : ' || utl_raw.cast_to_varchar2(l_decrypted_raw));
19
20    l_decrypted_raw := dbms_crypto.decrypt(src => l_encrypted_raw, typ => dbms_crypto.des_cbc_pkc
s5, key => l_key2);
21
22    dbms_output.put_line('Key2 : ' || utl_raw.cast_to_varchar2(l_decrypted_raw));
23 END;
24 /
Original : 1612-1791-1809-2605
Encrypted : 3534443342333642353141363846384237463732384636373943374630364234323243334539383042323135
Key1 : 1612-1791-1809-2605
DECLARE
ERROR at line 1:
ORA-28817: PL/SQL function returned an error.
ORA-06512: at "SYS.DBMS_CRYPTO_FFI", line 67
ORA-06512: at "SYS.DBMS_CRYPTO", line 44
ORA-06512: at line 20

How to avoid shared locks when validating foreign keys?

I have a table with a FK and I want to update a row in that table without being blocked by another transaction which is updating the parent row at the same time. Here is an example:
CREATE TABLE dbo.ParentTable
PARENT_ID int NOT NULL,
VALUE varchar(128) NULL,
CONSTRAINT PK_ParentTable PRIMARY KEY (PARENT_ID)
GO
CREATE TABLE dbo.ChildTable
CHILD_ID int NOT NULL,
PARENT_ID INT NULL,
VALUE varchar(128) NULL,
CONSTRAINT PK_ChildTable PRIMARY KEY (CHILD_ID),
CONSTRAINT FK_ChildTable__ParentTable FOREIGN KEY (PARENT_ID)
REFERENCES dbo.ParentTable (PARENT_ID)
GO
INSERT INTO ParentTable(PARENT_ID, VALUE)
VALUES (1, 'Some value');
INSERT INTO ChildTable(CHILD_ID, PARENT_ID, VALUE)
VALUES (1, 1, 'Some value');
GO
Now I have 2 transactions running at the same time:
The first transaction:
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;BEGIN TRAN
UPDATE ParentTable
SET VALUE = 'Test'
WHERE PARENT_ID = 1;
The second transaction:
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;BEGIN TRAN
UPDATE ChildTable
SET VALUE = 'Test',
PARENT_ID = 1
WHERE CHILD_ID = 1;
If 'UPDATE ParentTable' statement runs a bit earlier, then 'UPDATE ChildTable' statement is blocked untill the first transaction is committed or rollbacked. It happens because SQL Server acquires shared locks when validating foreign keys, even
if the transaction is using read uncommitted, read committed snapshot (read committed using row versioning) or snapshot isolation level. I cannot see why change in the ParentTable.VALUE should prevent me from updating ChildTable. Please note that ParentTable.PARENT_ID
is not changed by the first transaction, which means that from FK's point of view whatevere is set to the ParentTable.VALUE is never a problem for referential integrity. So, such blocking behavior seems to me not logical. Furthermore, it contradicts to the
MSDN:
Transactions running at the READ UNCOMMITTED level do not issue shared locks to prevent other transactions from modifying data read by the current transaction. READ UNCOMMITTED transactions are also not blocked by exclusive locks that would prevent the
current transaction from reading rows that have been modified but not committed by other transactions.
Does anybody know how to workaround the issue? In other words, are there any tricks to avoid shared locks when validating foreign keys? (Disabling FK is not an option.) Thank you.
Alexey

If you change the primary key of the parent table to be nonclustered, there is no blocking.
Indeed, when I update ParentTable.VALUE, then:
in case of PK_ParentTable is clustered, a particular row in the clustered index is locked (request_mode:X, resource_type: KEY)
in case of PK_ParentTable is non-clustered, a particular physical row in the heap is locked (request_mode:X, resource_type: RID).
and when I update ChildTable.PARENT_ID, then:
in case of PK_ParentTable is clustered, this index is used to verify referential integrity:
in case of PK_ParentTable is non-clustered, again this index is used to verify referential integrity, but this time it is not locked:
It is important to note that in both cases SQL Server acquires shared locks when validating foreign keys. The principal difference is that in case of clustered PK_ParentTable the request is blocked, while for non-clustered index it is granted.
Thank you, Erland for the idea and explanations.
The only thing that upsets me is that this solution cannot be applied, because I don't want to convert PK_ParentTable from clustered to non-clustered just to avoid blocking issues. It is a pity that SQL Server is not smart enough to realize that:
ParentTable.PARENT_ID is not changed and, as a result, should not be locked
ChildTable.PARENT_ID is not actually changed either (old value in my example is 1 and the new value is also 1) and, as a result, there is no need at all for validating the foreign key.
In fact, the problem I described is just a tip of the iceberg. The real challenge is that I have deadlocks because of the FK validation. In reality, the first transaction has an additional statement which updates ChildTable:
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
BEGIN TRAN
UPDATE ParentTable
SET VALUE = 'Test'
WHERE PARENT_ID = 1;
UPDATE ChildTable
SET VALUE = 'Test'
WHERE PARENT_ID = 1;
The result is famous message:
Msg 1205, Level 13, State 51, Line xx
Transaction (Process ID xx) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.
I know that if I change the order of the two statements, it will solve the deadlock issue. But let's imagine I cannot do it. What are the other options?
Alexey

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Did AutoConfig complete successfully?
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Thanks,
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Error when adding Non-Cumulative InfoCube to a Multi-Providers

I want to include an InfoCube using non-cumulative key figures (0IC_C03) to a MultiProvider that includes other basic cubes. Is this possible? I thought I read that you could include one non-cumulative cube in a MultiProvider. When I added 0IC_C03 to the MultiProvider I get the following error when activating: "Define the characteristics of the validity table for non-cumulatives." The validity table is defined for 0IC_C03, do I need to do anything special in the multiprovider? Any ideas on what I need to do?
Thanks,
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Edited by: Chris Robertson on Nov 18, 2008 4:52 PM

Hi Chris,
I am having the same issue. Did you manage to fix this?
Thanks,
Milind

TableSorter errors when adding new data

so here is the deal:
I am using the TableSorter.java helper class with DefaultTableModel
from: http://java.sun.com/docs/books/tutorial/uiswing/components/table.html
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DefaultTableModel.addRow()
DefaultTableModel.removeRow() and
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java.lang.ArrayIndexOutOfBoundsException: 5
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import java.util.*;
import java.util.List;
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import javax.swing.event.TableModelEvent;
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* TableSorter is a decorator for TableModels; adding sorting
* functionality to a supplied TableModel. TableSorter does
* not store or copy the data in its TableModel; instead it maintains
* a map from the row indexes of the view to the row indexes of the
* model. As requests are made of the sorter (like getValueAt(row, col))
* they are passed to the underlying model after the row numbers
* have been translated via the internal mapping array. This way,
* the TableSorter appears to hold another copy of the table
* with the rows in a different order.
* <p/>
* TableSorter registers itself as a listener to the underlying model,
* just as the JTable itself would. Events recieved from the model
* are examined, sometimes manipulated (typically widened), and then
* passed on to the TableSorter's listeners (typically the JTable).
* If a change to the model has invalidated the order of TableSorter's
* rows, a note of this is made and the sorter will resort the
* rows the next time a value is requested.
* <p/>
* When the tableHeader property is set, either by using the
* setTableHeader() method or the two argument constructor, the
* table header may be used as a complete UI for TableSorter.
* The default renderer of the tableHeader is decorated with a renderer
* that indicates the sorting status of each column. In addition,
* a mouse listener is installed with the following behavior:
* <ul>
* <li>
* Mouse-click: Clears the sorting status of all other columns
* and advances the sorting status of that column through three
* values: {NOT_SORTED, ASCENDING, DESCENDING} (then back to
* NOT_SORTED again).
* <li>
* SHIFT-mouse-click: Clears the sorting status of all other columns
* and cycles the sorting status of the column through the same
* three values, in the opposite order: {NOT_SORTED, DESCENDING, ASCENDING}.
* <li>
* CONTROL-mouse-click and CONTROL-SHIFT-mouse-click: as above except
* that the changes to the column do not cancel the statuses of columns
* that are already sorting - giving a way to initiate a compound
* sort.
* </ul>
* <p/>
* This is a long overdue rewrite of a class of the same name that
* first appeared in the swing table demos in 1997.
* @author Philip Milne
* @author Brendon McLean
* @author Dan van Enckevort
* @author Parwinder Sekhon
* @version 2.0 02/27/04
public class TableSorter extends AbstractTableModel
    protected TableModel tableModel;
    public static final int DESCENDING = -1;
    public static final int NOT_SORTED = 0;
    public static final int ASCENDING = 1;
    private static Directive EMPTY_DIRECTIVE = new Directive(-1, NOT_SORTED);
    public static final Comparator COMPARABLE_COMAPRATOR = new Comparator()
        public int compare(Object o1, Object o2)
            return ((Comparable) o1).compareTo(o2);
    public static final Comparator LEXICAL_COMPARATOR = new Comparator()
        public int compare(Object o1, Object o2)
            return o1.toString().compareTo(o2.toString());
    private Row[] viewToModel;
    private int[] modelToView;
    private JTableHeader tableHeader;
    private MouseListener mouseListener;
    private TableModelListener tableModelListener;
    private Map columnComparators = new HashMap();
    private List sortingColumns = new ArrayList();
    public TableSorter()
        this.mouseListener = new MouseHandler();
        this.tableModelListener = new TableModelHandler();
    public TableSorter(TableModel tableModel)
        this();
        setTableModel(tableModel);
    public TableSorter(TableModel tableModel, JTableHeader tableHeader)
        this();
        setTableHeader(tableHeader);
        setTableModel(tableModel);
    private void clearSortingState()
        viewToModel = null;
        modelToView = null;
    public TableModel getTableModel()
        return tableModel;
    public void setTableModel(TableModel tableModel)
        if (this.tableModel != null)
            this.tableModel.removeTableModelListener(tableModelListener);
        this.tableModel = tableModel;
        if (this.tableModel != null)
            this.tableModel.addTableModelListener(tableModelListener);
        clearSortingState();
        fireTableStructureChanged();
    public JTableHeader getTableHeader()
        return tableHeader;
    public void setTableHeader(JTableHeader tableHeader)
        if (this.tableHeader != null)
            this.tableHeader.removeMouseListener(mouseListener);
            TableCellRenderer defaultRenderer = this.tableHeader.getDefaultRenderer();
            if (defaultRenderer instanceof SortableHeaderRenderer)
                this.tableHeader.setDefaultRenderer(((SortableHeaderRenderer) defaultRenderer).tableCellRenderer);
        this.tableHeader = tableHeader;
        if (this.tableHeader != null)
            this.tableHeader.addMouseListener(mouseListener);
            this.tableHeader.setDefaultRenderer
                    new SortableHeaderRenderer(this.tableHeader.getDefaultRenderer())
    public boolean isSorting()
        return sortingColumns.size() != 0;
    private Directive getDirective(int column)
        for (int i = 0; i < sortingColumns.size(); i++)
            Directive directive = (Directive)sortingColumns.get(i);
            if (directive.column == column)
                return directive;
        return EMPTY_DIRECTIVE;
    public int getSortingStatus(int column)
        return getDirective(column).direction;
    private void sortingStatusChanged()
        clearSortingState();
        fireTableDataChanged();
        if (tableHeader != null)
            tableHeader.repaint();
    public void setSortingStatus(int column, int status)
        Directive directive = getDirective(column);
        if (directive != EMPTY_DIRECTIVE)
            sortingColumns.remove(directive);
        if (status != NOT_SORTED)
            sortingColumns.add(new Directive(column, status));
        sortingStatusChanged();
    protected Icon getHeaderRendererIcon(int column, int size)
        Directive directive = getDirective(column);
        if (directive == EMPTY_DIRECTIVE)
            return null;
        return new Arrow(directive.direction == DESCENDING, size, sortingColumns.indexOf(directive));
    private void cancelSorting()
        sortingColumns.clear();
        sortingStatusChanged();
    public void setColumnComparator(Class type, Comparator comparator)
        if (comparator == null)
            columnComparators.remove(type);
        else
            columnComparators.put(type, comparator);
    protected Comparator getComparator(int column)
        Class columnType = tableModel.getColumnClass(column);
        Comparator comparator = (Comparator) columnComparators.get(columnType);
        if (comparator != null)
            return comparator;
        if (Comparable.class.isAssignableFrom(columnType))
            return COMPARABLE_COMAPRATOR;
        return LEXICAL_COMPARATOR;
    private Row[] getViewToModel()
        if (viewToModel == null)
            int tableModelRowCount = tableModel.getRowCount();
            viewToModel = new Row[tableModelRowCount];
            for (int row = 0; row < tableModelRowCount; row++)
                viewToModel[row] = new Row(row);
            if (isSorting())
                Arrays.sort(viewToModel);
        return viewToModel;
    public int modelIndex(int viewIndex)
             return getViewToModel()[viewIndex].modelIndex;
    private int[] getModelToView()
        if (modelToView == null)
            int n = getViewToModel().length;
            modelToView = new int[n];
            for (int i = 0; i < n; i++)
                modelToView[modelIndex(i)] = i;
        return modelToView;
    // TableModel interface methods
    public int getRowCount()
        return (tableModel == null) ? 0 : tableModel.getRowCount();
    public int getColumnCount()
        return (tableModel == null) ? 0 : tableModel.getColumnCount();
    public String getColumnName(int column)
        return tableModel.getColumnName(column);
    public Class getColumnClass(int column)
        return tableModel.getColumnClass(column);
    public boolean isCellEditable(int row, int column)
        return tableModel.isCellEditable(modelIndex(row), column);
    public Object getValueAt(int row, int column)
        return tableModel.getValueAt(modelIndex(row), column);
    public void setValueAt(Object aValue, int row, int column)
        tableModel.setValueAt(aValue, modelIndex(row), column);
    // Helper classes
    private class Row implements Comparable
        private int modelIndex;
        public Row(int index)
            this.modelIndex = index;
        public int compareTo(Object o)
            int row1 = modelIndex;
            int row2 = ((Row) o).modelIndex;
            for (Iterator it = sortingColumns.iterator(); it.hasNext();)
                Directive directive = (Directive) it.next();
                int column = directive.column;
                Object o1 = tableModel.getValueAt(row1, column);
                Object o2 = tableModel.getValueAt(row2, column);
                int comparison = 0;
                // Define null less than everything, except null.
                if (o1 == null && o2 == null)
                    comparison = 0;
                } else if (o1 == null)
                    comparison = -1;
                } else if (o2 == null)
                    comparison = 1;
                } else {
                    comparison = getComparator(column).compare(o1, o2);
                if (comparison != 0)
                    return directive.direction == DESCENDING ? -comparison : comparison;
            return 0;
    private class TableModelHandler implements TableModelListener
        public void tableChanged(TableModelEvent e)
            // If we're not sorting by anything, just pass the event along.
            if (!isSorting())
                clearSortingState();
                fireTableChanged(e);
                return;
            // If the table structure has changed, cancel the sorting; the
            // sorting columns may have been either moved or deleted from
            // the model.
            if (e.getFirstRow() == TableModelEvent.HEADER_ROW)
                cancelSorting();
                fireTableChanged(e);
                return;
            // We can map a cell event through to the view without widening
            // when the following conditions apply:
            // a) all the changes are on one row (e.getFirstRow() == e.getLastRow()) and,
            // b) all the changes are in one column (column != TableModelEvent.ALL_COLUMNS) and,
            // c) we are not sorting on that column (getSortingStatus(column) == NOT_SORTED) and,
            // d) a reverse lookup will not trigger a sort (modelToView != null)
            // Note: INSERT and DELETE events fail this test as they have column == ALL_COLUMNS.
            // The last check, for (modelToView != null) is to see if modelToView
            // is already allocated. If we don't do this check; sorting can become
            // a performance bottleneck for applications where cells
            // change rapidly in different parts of the table. If cells
            // change alternately in the sorting column and then outside of
            // it this class can end up re-sorting on alternate cell updates -
            // which can be a performance problem for large tables. The last
            // clause avoids this problem.
            int column = e.getColumn();
            if (e.getFirstRow() == e.getLastRow()
                    && column != TableModelEvent.ALL_COLUMNS
                    && getSortingStatus(column) == NOT_SORTED
                    && modelToView != null)
                int viewIndex = getModelToView()[e.getFirstRow()];
                fireTableChanged(new TableModelEvent(TableSorter.this,
                                                     viewIndex, viewIndex,
                                                     column, e.getType()));
                return;
            // Something has happened to the data that may have invalidated the row order.
            clearSortingState();
            fireTableDataChanged();
            return;
    private class MouseHandler extends MouseAdapter
        public void mouseClicked(MouseEvent e)
            JTableHeader h = (JTableHeader) e.getSource();
            TableColumnModel columnModel = h.getColumnModel();
            int viewColumn = columnModel.getColumnIndexAtX(e.getX());
            int column = columnModel.getColumn(viewColumn).getModelIndex();
            if (column != -1)
                int status = getSortingStatus(column);
                if (!e.isControlDown())
                    cancelSorting();
                // Cycle the sorting states through {NOT_SORTED, ASCENDING, DESCENDING} or
                // {NOT_SORTED, DESCENDING, ASCENDING} depending on whether shift is pressed.
                status = status + (e.isShiftDown() ? -1 : 1);
                status = (status + 4) % 3 - 1; // signed mod, returning {-1, 0, 1}
                setSortingStatus(column, status);
    private static class Arrow implements Icon
        private boolean descending;
        private int size;
        private int priority;
        public Arrow(boolean descending, int size, int priority)
            this.descending = descending;
            this.size = size;
            this.priority = priority;
        public void paintIcon(Component c, Graphics g, int x, int y)
            Color color = c == null ? Color.GRAY : c.getBackground();
            // In a compound sort, make each succesive triangle 20%
            // smaller than the previous one.
            int dx = (int)(size/2*Math.pow(0.8, priority));
            int dy = descending ? dx : -dx;
            // Align icon (roughly) with font baseline.
            y = y + 5*size/6 + (descending ? -dy : 0);
            int shift = descending ? 1 : -1;
            g.translate(x, y);
            // Right diagonal.
            g.setColor(color.darker());
            g.drawLine(dx / 2, dy, 0, 0);
            g.drawLine(dx / 2, dy + shift, 0, shift);
            // Left diagonal.
            g.setColor(color.brighter());
            g.drawLine(dx / 2, dy, dx, 0);
            g.drawLine(dx / 2, dy + shift, dx, shift);
            // Horizontal line.
            if (descending) {
                g.setColor(color.darker().darker());
            } else {
                g.setColor(color.brighter().brighter());
            g.drawLine(dx, 0, 0, 0);
            g.setColor(color);
            g.translate(-x, -y);
        public int getIconWidth()
            return size;
        public int getIconHeight()
            return size;
    private class SortableHeaderRenderer implements TableCellRenderer
        private TableCellRenderer tableCellRenderer;
        public SortableHeaderRenderer(TableCellRenderer tableCellRenderer)
            this.tableCellRenderer = tableCellRenderer;
        public Component getTableCellRendererComponent(JTable table,
                                                       Object value,
                                                       boolean isSelected,
                                                       boolean hasFocus,
                                                       int row,
                                                       int column)
            Component c = tableCellRenderer.getTableCellRendererComponent(table,
                    value, isSelected, hasFocus, row, column);
            if (c instanceof JLabel) {
                JLabel l = (JLabel) c;
                l.setHorizontalTextPosition(JLabel.LEFT);
                int modelColumn = table.convertColumnIndexToModel(column);
                l.setIcon(getHeaderRendererIcon(modelColumn, l.getFont().getSize()));
            return c;
    private static class Directive
        private int column;
        private int direction;
        public Directive(int column, int direction)
            this.column = column;
            this.direction = direction;
}any input will be appreciated.
thanks
Peter

The code you posted doesn't help us at all. Its just a duplicate of the code from the tutorial. The custom code is what you have written. For example do you update the TableModel from the Event Thread? Do you update the SortModel or the DefaultTableModel? If you actually provide your test code and somebody has already downloaded the sort classes, then maybe they will test your code against the classes. But I doubt if people will download the sort classes and create a test program just to see if they can duplicate your results (at least I know I'm not about to).

Performance degradation when using foreign keys

Hi,
I face drastic performance degradation when I add foreign keys to a table and perform insert / update on that table.
I have a row store table to which I need to insert around 1,50,000 records.
If the table has no foreign key reference it takes maximum of 5 seconds but if the same table has references to other tables (in my case there are 3 references), the processing speed reduces drastically to 2 minutes.
Is there any solution / best practice that can help me in gaining performance (processing speed) in this situation?
Thanks
S.Srivatsan

Hi Sri,
When you perform one insert in any database table which is having foreign key relationships, it will check the corresponding parent tables to check whether the master data is available or not. If your table is having 2 foreign key relationship, it happen twice per insert. Hence the performance will degrade. This is one of the reasons why ECC doesn't establish foreign key relationship in the back end database. The case is not just for INSERT, for UPDATE & DELETE the same is applicable.
Sreehari

Error when adding a disk to Cluster Shared Volumes

When adding a disk to Cluster Shared Volumes via Failover Cluster Manager, I get a couple of errors.
Event ID 5145 in System Log:
While adding the disk ('Cluster Disk 1') to Cluster Shared Volumes, setting explicit snapshot diff area association for volume ('\\?\Volume{420e2cc4-4fb4-41be-afb1-65f2ee62457a}\') failed with error 'HrError(0x8004230d)'. The only supported software snapshot
diff area association for Cluster Shared Volumes is to self.
Cluster disk resource 'Cluster Disk 1' failed to delete a software snapshot. The diff area on volume '\\?\Volume{420e2cc4-4fb4-41be-afb1-65f2ee62457a}\' could not be dissociated from volume '\\?\Volume{420e2cc4-4fb4-41be-afb1-65f2ee62457a}\'. This
may be caused by active snapshots. Cluster Shared Volumes requires that the software snapshot be located on the same disk.
Any ideas why I'm getting this error? This disk was previously added as a CSV to different Windows failover cluster, if that matters. Thanks.

Hi,
As the disk was previously used as a CSV, I assume there is still data on it.
Please check if any VSS snapshot created on that disk. If so, delete them and re-add it as a CSV to see the result - a quick way is to backup important files and perform a re-format if you cannot confirm.
If you have any feedback on our support, please send to [email protected]

Error when adding Foreign Key

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