The implementation of coloring line replacing on a ListView?

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  Concerning

  André

• The implementation of the method of Frank Nimphius's to insert a line at the end of a table?

  Mr President.

  The implementation of the method of Frank Nimphius's to insert a line at the end of a table?

  https://blogs.Oracle.com/jdevotnharvest/entry/how_to_add_new_adf

  I put this method is my CustomerViewRowImpl class

  Like this

  public String onRowCreate() {
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   DCIteratorBinding dciter = (DCIteratorBinding) bindings.get("allDepartmentsIterator");
   //access the underlying RowSetIterator
   RowSetIterator rsi = dciter.getRowSetIterator();
   //get handle to the last row
   Row lastRow = rsi.last();
   //obtain the index of the last row
   int lastRowIndex = rsi.getRangeIndexOf(lastRow);
   //create a new row
   Row newRow = rsi.createRow();
   //initialize the row
   newRow.setNewRowState(Row.STATUS_INITIALIZED);
   //add row to last index + 1 so it becomes last in the range set
   rsi.insertRowAtRangeIndex(lastRowIndex +1, newRow); 
   //make row the current row so it is displayed correctly
   rsi.setCurrentRow(newRow);                          
   return null;
  }  
  

  My iterator name is CustomerView1Iterator

  What to write get the method at line 5 above

   DCIteratorBinding dciter = (DCIteratorBinding) bindings.get("allDepartmentsIterator");
  

  Concerning

  Hello world

  I put my name to vo iterator CustomerView1Iterator instead of allDepartmentsIterator.

  And it works quite well

  Concerning

• How to color line specific "BOLD" / inactive in the classic report (oracle apex).

  I have the classic report in oracle apex

  with query below

  Select EMPNO, ENAME, HIREDATE, ADDRESS of emp COMM;

  If the ENAME = "John".

  so, I want to do any "BOLD" line and readonly/inactive. (set of rank who name John)

  Thanks in advance...

  Simple answer: see this blog: reports APEX: color line based on column value

  Thank you

  Tony Miller
  Software LuvMuffin
  Ruckersville, WILL

• The implementation of the exclusive line locking in Oracle

  Hi all
  
  Since the beginning of learning Oracle, I've known that oracle has no row-level lock. Row level locking is achieved by ITL in the header of the block.
  In this context, I am curious how statement "lock table in exclusive mode of line" is implemented? Update for all ITLs lines all the blocks belonging to the table?
  
  Best regards
  Leon

  I'm not sure what you mean by Oracle has no blockage at the level of the lines. Line level Oracle most certainly is a lock. A single line in a table can be locked without blocking the other lines of the table, or even of other lines in the same block.

  You are right that this works through the ITL. When a DML is run, if a session doesn't has not already open transaction, Oracle will create one, by booking a slot/segment/wrap in the rollback segment header. Then, in the block where the line should be blocked, an ITL slot is reserved in the block header, that contains this transaction id, essentially pointing to this location of rollback segment. Now, to lock a specific line in the directory of the line, there is a byte of the lock. The locking byte is either 0, which means that the row is not locked, or she will 1.n value, where n is the number of ITL sites reserved in the block header. Thus, if the locking byte is not null, it points to slot ITL of the transaction that holds the lock. So, you can see that it is very easy for a transaction lock a single line in a block, or all lines in the block. Simply set the byte corresponding to the ITL (s) appropriate locking.

  This fact implies, it is that Oracle has no "centralized list of the locks on level line. Row-level locks are inherent in the structure of datablock, as stated above.

  Hope the helps to clarify your understanding.

  -Mark

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  NOTE:

  I use the video monitor for the CS5.5 program.

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