How to compare, present value: block.text_item with the value of data

Hello
Could you please tell me
How to compare the current value: block.text_item with the corresponding database column value.
I use form 10g

It has block and there is a text element in this block.
When I run the form and query the block (in a table), the: block.text_item show me any value it in the database.
Now I add value in the: block.text_item to the existing value.

now
the: block.text_item contains the old + new added value
While
the database table contains the value 'old '.

Now, with a click of button, I want to know what value I added

Please can you me, is it possible without writing a select query?

Hello

Now, with a click of button, I want to know what value I added

So you're saying always user will bring added value to the existing value. Because it will fail in a case. Let's say that
Database value is = ABCD
The user opens the form and he took the D and write E and now value is ABCE and length is always the same 4. There is therefore no need to add.

In any case, you can know that the value of database at run time, there is a property for the element called DATABASE_VALUE. She gives the value that is in the database while you run the form before save. and you can use it like that...

Trigger = WHEN-MOUSE-DOUBLE-CLICK on item level
DECLARE
  vItemValue DATATYPE; -- Set the data type according to your desired field.
  vValueAdded DATATYPE; -- Set the data type according to your desired field.
BEGIN
  vItemValue:=GET_ITEM_PROPERTY('ITEM_NAME',DATABASE_VALUE);  -- It will return you the database value in vItemValue variable.
  IF LENGTH(vItemValue)>LENGTH(:FORM_ITEM_NAME) THEN  -- It mean something change or added
    vValueAdded:=SUBSTR(:FORM_ITEM_NAME,LENGTH(vItemValue)+1);
    MESSAGE('Added value is : '||vValueAdded);  -- It will show you the added value.
  END IF;
  -- now suppose you want to show the old and new value in message not the added one
  -- Then no need of IF condition. You can just use message like this
  -- And i would prefer to use like this way
  MESSAGE('Old Value : '||vItemValue||'  New Value - '||:FORM_ITEM_NAME);
  MESSAGE('Old Value : '||vItemValue||'  New Value - '||:FORM_ITEM_NAME);
END;

Hope that's clear.

-Clément

Tags: Oracle Development

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