Record blocking in Oracle

can we say that there is no record blocking in Oracle if two users from two session access the same block at the same time even if the select statment
will occur just before a commit(like writing the select statment in a pre-insert
trigger at the form level where the select will be performed just before the
insert is applid to the databse)???
THANKS A LOT FOR YOUR HELP

Just a clarification about READ CONSISTENCY.
Even if first session commits, second session will see changes only if it started after the commit. Let's see an example :
- time 0 : session2 reads row 1
- time 1 : session1 updates row 2 and commits
- time 2 : session2 reads row 2 : it gets old data, and Oracle uses undo segments to do that.
See
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96524/c01_02intro.htm#44609
Paul

Similar Messages

Oracle Forms - need to update multi-record block - Help needed asap

Hi,
We are using Oracle apps release 11i - Oracle forms 6i.
I have a field "project_start_date" in project_block in a custom form. There is another multi-record block called role_block in the same custom form and it has a field named start_date. Requirement is when ever I make change in the project_start_date in project_block, that should reflect in role_block.start_date. I tried different means and could update only the very first record of the multi-record block - role_block. I need to update all the records in the role_block with the same project_start_date. Used looping and several other methods. But could not achieve. Any help is really appreciated.
Thanks
Akil

Hi;
For your issue i suggest close your thread here as changing thread status to answered and move it to Forum Home » Application Development in PL/SQL » Forms which you can get more quick response
Regard
Helios

How to do it in multi-record block

Hi all,
i have 1 text items in a multi-record block number of record displayed 10
and i have values like 100 , 50, 30 in first 3 records and in 5th record i want to put some value like
20 then i want to calculate all values like 100 + 50 + 30 +20 = 200 and i want to put the total value in a single record block.
but my problem is i cannot able to calculate all the value because for the totale value i have to
write a for loop to loop through the record
but go_block() is not working in post_change .
if any solution is there plz suggest.......

Hi zeeshan
my problem is i cannot able to calculate all the value because for the total value
put the total value in a single record block.
First pls the following...
Guidelines for Working with Calculated Items Calculated items_
1- They are display-only control items.
2-Calculated items cannot be database items.
3.While you can set a calculated item's Enabled, Mouse Navigate, and Keyboard Navigable properties to Yes,
you cannot set the Insert Allowed or Update Allowed properties to Yes
Second Keyword: TOTAL is a reserved oracle key word... pls read the Details...
go_block() is not working in post_change .well u can use timers but no need for it u can reference block item but first u have to accumulate the values per record in WHEN-VALIDATE-ITEM TRIGGER in the last calculated item which is inserted by the user and assign it to the display item in ur current multi-record block :*block_name.total_item*.. as follow...
:block_name.total_item := :item1 + .... ; Then u create a second display item > no of records property = 1 , named e.g. final_summarized_totals
In order to summarize this total values accumulated in the multi-record display item named e.g. block_name.total_item
Finally using PRE-INSERT , PRE-UPDATE,PRE-DELETE Triggers to assign the value calculated into the display item * block_name.total_item* into the db_item into the previously mentioned Trigger Block-Level Off-course.
:block_name.total_db_tem := :i:block_name.final_summarized_totals ; Hope this helps...
Regards,
Amatu Allah

Check box Item property in mutiple record block

Hi,
I have migrated a number of forms from 6i to 10g. All seems to be working apart from a problem with the display of check boxes that are part of a multiple record block. The item property for the checkbox has font weight set to bold and this works fine on the 6g version. On the 10g version it is displayed as normal font weight.
Any other items in the record, text items etc are displayed in bold correctly.
As this seems to affect a lot of forms is there some patch/fix that I should have applied or is this just the way it is?
I am trying to use set_item_instance_property to set them manually but that doesn't seem to make any difference.
Thanks in advance and Happy Christmas/New Year.

Problem solved following response from Oracle support desk -
UPDATE
======
Hi Dave,
When using lookandfeel=generic, the colors for different Windows items (e.g., menu, check
box, window background ...etc) are taken directly from the Operating System
(OS) user settings. I tested the issue with lookandfeel=oracle and with
colorScheme set to different values, and check box tick in this case takes the
same color as the color scheme used.
I suggest then using dark color scheme to give you a similar effect as it was in Forms 6i. for example:
colorScheme=Titanium

Check box in a multi record block

I have a multi record block that has a check box. I need to be able to go to the first record on the block, go through each row and check to see if it's selected. I will then get all the rows that were selected and passed it as a parameter in a package.I have already declared a global variable in the package to get all the rows selected.
Can anyone please help.

Hi
This is my solution for your problem. If I understand correctly as you have to post the selected records from form to journal entry (a server operation). What you need to do is in your Oracle Forms multi record block construct a loop which goes from first record to last record of your data block, capture the selected records (wherever the check box is CHECKED ON) into a PL/SQL table structure (PL/SQL table is quite simillar to Oracle Forms RECORD GROUP structure, but more versatile as it can be recognized on the back end too).
Once you populate the PL/SQL table with the selected record, pass the PL/SQL table itself as parameter to your package.
Open the PL/SQL table in your destination code and do further processing with those selected records !!
Hope this will work !!
MOHAMMED R.QURASHI
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by kay:
I CANNOT USE A RECORD GROUP. I HAVE TO EVENTUALLY POST THE SELECTED ROWS INTO JOURNAL ENTRIES. I STILL NEED TO BE ABLE TO
GET ALL THE ROWS SELECTED BY THE USER.CAN I USE A CURSOR IN THE FORM TO GET ALL THE ROWS
SELECTED?.
THANKS FOR THE REPLY GANESAN.<HR></BLOCKQUOTE>
null

Inserting a record in an Oracle database

Hi,
I would appreciate if anyone could provide a code snippet showing how to insert a record into an Oracle 9i database. The columns in the database table have datatypes such as NUMBR, VACHAR2, and DATE. Some of the columns may be null. The input text is in the form of String. The string from the date fields is in the form 'YYYY-MM-DD HH:MI:SS PM' and I have converted these to java.sql.Date objects. How do I deal with nulls?
Thanks.

I am having a problem inserting a date field. The input string is in the form YYYY-MM-DD HH:MM PM. I converted the input string to a java.sql.Date object before trying to post the record. However, an example of what gets inserted is: '2001-12-04 12:00 AM' even if the input date string is: "2001-12-04 04:40". In other words, the hour and minute portions do not get inserted correctly.
Why is this and how can I resovle this? My code is as follows: (try/catch blocks are not shown)
String m_HireDate = "2001-12-04 04:40 PM"; // Input string.
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm a");
java.utilDate m_UtilDate = sdf.parse(URLDecoder.decode(m_HireDate);
java.sql.Date m_SQLDate = new java.sql.Date(m_UtilDate);
Connection con = DriverManager.getConnection(url,"abc"," abc") ;
Statement stmt =
con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_UPDATABLE) ;
String sqlselect = "SELECT EMP_ID, FIRST_NAME, MIDDLE_NAME, LAST_NAME, HIRE_DATE, FROM EMP" ;
ResultSet rs = stmt.executeQuery(sqlselect) ;
// EMP_ID is the primary key. It has a datatype of NUMBER in the database tabe
int EMP_ID1 = Integer.parseInt(EMP_ID);
rs.moveToInsertRow() ;
rs.updateInt("EMP_ID", EMP_ID1) ;
rs.updateString("FIRST_NAME", "John" );
rs.updateString("MIDDLE_NAME", "M" );
rs.updateString("LAST_NAME", "Smith");
rs.updateDate("HIRE_DATE" , m_SQLDate); //m_SQLDate is a java.sql.Date object
rs.insertRow() ;
Now get the inserted value from SQLPLUS:
SELECT TO_CHAR(HIRE_DATE, 'YYYY-MM-DD HH:MI PM') FROM EMP WHERE EMP_ID =EMP_ID1;
The output is: "2001-12-04 12:00 AM"
Thanks.

Check Duplicate data during data key-in Multi Record Block

Dear all,
I have a situation where i have to check duplicate data entry(on a particular field,which is a mandatory field,i.e. it cannot be skipped by user without entering value) while data key-in in a Multi Record block.
As for reference I have used a logic,such as
1>In a When-Validate-Record trigger of that block I am assigning the value of that current item in Table type variable(collection type)
as this trigger fire every time as soon as i leave that record,so its assigning the value of that current time.And this process continues
then
2>In a When-Validate-Item trigger of that corresponding item(i.e. the trigger is at item level) has been written,where it compares the value of that current item and the value stored in Table type variable(collection type) of When-Validate-Record trigger.If the current item value is matched with any value stored in Table type variable I am showing a message of ('Duplicate Record') following by raise_form_trigger failure
This code is working fine for checking duplicate value of that multi record field
The problem here is that suppose if usee gets a message of ('Duplicate Record') and after that without saving the values if user try to query of that block then also when validate item fired where as I am expecting ORACLE default alert message('Do You want to save?'),I want to restrict this When-Validate Item fire during query time..........................while user try to query.
Please give me a meaningful logic or code for solving this problem
Any other logic to solve this problem is also welcome

When-Validate-Record trigger
When-Validate-Item triggerThat smells like Oracle Forms...
And the Oracle Forms forum is over here: Forms

Multi Record Block Problem

Hi,
I have a multi record block with two fields NAME and DATE. On clicking the Save Button a procedure (PROC_BEFORE_SAVE) is called which loops through this block, and deletes empty records.
PROC_BEFORE_SAVE
LOOP
     IF :TI_NAME IS NULL THEN
          DELETE_RECORD;
     END IF;
     NEXT_RECORD;
     EXIT WHEN :SYSTEM.LAST_RECORD = 'TRUE';
END LOOP;
The proc fails and throws error (Oracle Error Unable to Update Records) only for the case that the first few records are null. Sample data given below.
Name  -  Date
NULL  -  NULL
NULL  -  NULL
NULL  -  NULL
AJ  -  10/02/2005
JA  -  12/12/2004
AJV  -  12/12/2002
This happens because it tries to update the NOT NULL field NAME as NULL.
Could somebody please tell me why this is happening? Is there something wrong with the procedure?
I am using Oracle Forms 6.0.8.8.0 in Windows 2000 Professional edition.
Any help would be greatly appreciated.
Thanks,
Anoop

Hi,
Thanks for the reply. But CLEAR_RECORD also doesn't seem to work.
Thanks,
Anoop

Enabling and disabling the button in the multi record block

hi all,
i am using
Forms [32 Bit] Version 6.0.8.24.1 (Production)
Oracle Database 10g Release 10.2.0.1.0 - Production
i have a multi record block each block contains a button(button is to approve the record in terms of changing the status)
i have the items like date,remarks and button
the button should be enabled if the remarks is not null otherwise it should be disabled.
for this in pre-record trigger i have written
if :record is null then
   set_item_property('button',enabled,property_false);
else
      set_item_property('button',enabled,property_false);
end if;what problem is enable and disable is impacting on all the buttons in the block. in other words if first record's remarks is null then all the records button is disabled. if first record's remarks column is not null then all the records of the button column is enabled.
i have to make enable and disable the button for the corresponding record.that means if first record's remarks column is not null then only first records button should be enabled others should be disabled.
Thanks..

You need to set the No. of items displayed to 1 as Ammad had said, additionally you can set the X and Y Position (Just Y will do and having fixed X) of the button depending upon the current record.
can u explain this part alone bit more (setting the position of x and y)You need to calculate the variable Y_POS depending upon the current position of the cursor that is the current record.
You can find the current record Y_POS using combination of
V_CURRENT_RECORD := :SYSTEM.CURSOR_RECORD;
V_TOP_RECORD := GET_BLOCK_PROPERTY ('BLOCK_NAME', TOP_RECORD);
V_ITEM_Y_POS := GET_ITEM_PROPERTY ('ITEM_NAME', Y_POS);
-- Also needs to add the Y_POS of the relative other items in the muti-record block
V_HEIGHT := GET_ITEM_PROPERTY ('BUTTON_NAME', HEIGHT);
-- Note :- TOP_RECORD Returns the record number of the topmost visible record in the given block.
V_Y_POS := V_ITEM_Y_POS + ((V_CURRENT_RECORD - V_TOP_RECORD) * V_HEIGHT);
-- You will need to add Distance between Items in records if anyThen you can Set the current Y_POS of the button.
SET_ITEM_PROPERTY ('BUTTON_NAME', Y_POS, V_Y_POS);
[/code[
Hope this helps
Best Regards
Arif Khadas
Edited by: Arif Khadas on Feb 24, 2011 4:58 PM

Get three previous records of the current record in an Oracle Form

Hi,
I need to get three previous records of the current record in an Oracle Form
Sorry for the lengthy explanation:
I have a table name: ARCHIVE_DATA with column name: coll_time and its data type DATE.
SQL> SELECT COLL_TIME FROM ARCHIVE_DATA;
COLL_TIME
12-AUG-05
12-AUG-05
12-AUG-05
12-AUG-05
12-AUG-05
12-AUG-05
12-AUG-05
12-AUG-05
12-AUG-05
12-AUG-05
10 rows selected.
SQL> select to_char(coll_time,'dd-mon-yyyy:HH:MI:SS') from ARCHIVE_DATA;
TO_CHAR(COLL_TIME)
12-aug-2005:02:42:00
12-aug-2005:02:43:00
12-aug-2005:02:44:00
12-aug-2005:02:45:00
12-aug-2005:02:46:00
12-aug-2005:02:47:00
12-aug-2005:02:48:00
12-aug-2005:02:49:00
12-aug-2005:02:50:00
12-aug-2005:02:51:00
10 rows selected.
This is the Requirement:
In a Form's Block(BLK1), for example: the current_record is the fifth record from the top
(i.e. 12-aug-2005:02:46:00)
When the fifth record is the current_record and When I click a button, three previous records of the
current_record should be populated on the screen.
See what I did:
I created another table same as the first table(ARCHIVE_DATA) and its name is: THREE_RECS.
I am inserting three records from the first table(ARCHIVE_DATA) into the second table: THREE_RECS
which are less than the current record and ORDER BY DESC.
CANVAS:
Two blocks (BLK1, BLK2) based on ARCHIVE_DATA and THREE_RECS are on the same CANVAS.
But the first block (BLK1) which is based on the first table:ARCHIVE_DATA is populated with one record and the
second block (BLK2) is empty.
So when I click a particular button (ex: prev_recs), the second block(BLK2) should be populated with
three previous records of the current record( :BLK1.COLL_TIME)
(off course :BLK2 populates with one record and use arrows or scrollbar to get the other two records)
This is the code I wrote in the trigger and followed by the error:
1 BEGIN
2 DECLARE
3 cursor c1 IS
4           SELECT MONITOR_ID,
5               SAMPLE_ID,
6               COLL_TIME,
7               DEW_POINT
8          FROM ARCHIVE_DATA;
9 cursor c2(passing_date IN date) IS
10           SELECT MONITOR_ID,
11               SAMPLE_ID,
12               COLL_TIME,
13               DEW_POINT
14          FROM (SELECT MONITOR_ID,
15               SAMPLE_ID,
16               COLL_TIME,
17               DEW_POINT
18          FROM ARCHIVE_DATA
19          ORDER BY COLL_TIME desc)
20      WHERE COLL_TIME < passing_date;
21     BEGIN
22     FOR cur_rec in c1
23     LOOP
24          IF (cur_rec.COLL_TIME = to_date(:BLK.COLL_TIME,'dd-mon-yyyy:HH24:mi:ss')) then
25     FOR second_cur_rec in c2(second_cur_rec.COLL_TIME)
26          LOOP
27      IF c2%rowcount < 4 then
28               BEGIN
29               INSERT INTO THREE_RECS
30                    values(second_cur_rec.MONITOR_ID,
31                         second_cur_rec.SAMPLE_ID,
32                         second_cur_rec.COLL_TIME,
33                         second_cur_rec.DEW_POINT);
34               COMMIT;
35               END IF;
36 END LOOP;
37 END IF;
38 END LOOP;
39 END;
40 END;
This is the error I am getting:
Error 103 at line 14
Encountered the symbol "(" when expecting one of the following
a PL/SQL variable or double quoted string
an expanded name
an expanded name link
a table reference __expression
a key word
Resuming parse at line 126, column 46
Thanks in advance

Change C2 to:
cursor c2(passing_date IN date) IS
SELECT MONITOR_ID, SAMPLE_ID,
               COLL_TIME, DEW_POINT
    FROM ARCHIVE_DATA
    WHERE COLL_TIME < passing_date
    ORDER BY COLL_TIME desc;And rather than populating a table with the three records, you could just select the three records using: where COLL_TIME between Prev3_time and Prev1_time

Image item in multi-record block - PLEASE SOMEONE HELP !

Hello everyone.
I have a multi-record block with an image item that is not in teh table, is populated in the post-query trigger with a read_image_item, from a gif file. This block is child of another block. The problem is that the first records of the block, the ones that fit on the screen, are not showing the image properly, the image appears grey, distorted. In reality, the image dont adjust to the size of the item, as it is especified in the properties. When i scroll down, the rest of records show the image perfect, but this ones still are distorted.
Forms is 6.0.8.22.1, over oracle 9i. Thank you all in advance.

hello
just me what is datatype of ur image record ?

Image item in multi-record block

Hello everyone.
I have a multi-record block with an image item that is not in teh table, is populated in the post-query trigger with a read_image_item, from a gif file. This block is child of another block. The problem is that the first records of the block, the ones that fit on the screen, are not showing the image properly, the image appears grey, distorted. When i scroll down, the rest of records show the image perfect, but this ones still are distorted.
Forms is 6.0.8.22.1, over oracle 9i. Thank you all in advance.

hello
just me what is datatype of ur image record ?

Fill a multi record block with a for-loop

Hi
I've got a simple question but I couldn't find a solution yet.
I have a multi record block and behind this i wrote a post-query-trigger with a cursor and a for-loop. Now I try to show each record of the for-loop in the multi record block. The loop works correctly, but the problem is that I only see the last found record of the loop in the first multi record and I'm not able to go to the next multi record when the loop finds more then one record.
I tried to use NEXT_RECORD but then I got the error message "100500: non-ORACLE exception".
May someone help me? Thanks a lot!

What exactly are you trying to do? If you are simply trying to display the result of a query in a Multi-Record Block (MRB), I would recommend basing your block on the query (From Clause Query) or if you are simply displaying the contents of a table or a view in the block, base your MRB on the table or view and let Forms handle displaying the records.
The Post-Query (PQ) trigger will execute for each record displayed in the MRB, which I'm sure is not what you intended. Since the trigger fires for each record, your loop is essentially assigning the value of each row in the cursor to the same row in the MRB.
Hope this helps.
Craig...

Get the first item value of previous record in a multi record block

Hai,
I have a multi record block with four items.I should get the first item value of the previous record so that I can increment its value in the current record.
Thanks.........

If you want a distinct value in each row or to be able to retrieve the records in the same order they were written then you should use a sequence.
If you want to retrieve the records in the same order they were created in the block then you will need a diffferent solution to the one you outline here since a user could enter a new record between two others.
I posted this a while back in response to someone who was using a sort_key item and resetting it for each row when a new record was inserted:
If you make the sort_key bigger then you have much more room to insert new rows in between existing rows without having to reset all the sort_keys.
Eg. you have rows with sort_keys of 129282000000000000 and 129283000000000000 (you can have more zeros if you want) and you want to insert a row in between. if you're using oracle forms then the user would have to click on the first of these rows and then do 'insert'. in your insert process you would store the sort keys of the current record and the one below, create a blank record in between and set the sort_key of that record to the average of the other two. you will be able to insert many new rows in between the original 2 before running out of space in the sort_key field.
the method above is not sufficient, there are some other cases to consider:
1) when the user is on the last record of the block then you will just create a new record with sort_key set to a greater number than the row before. you can have the sort_key defined as number(38) and to safely allow you to enter 1000 rows each new row would normally be 10E33 greater than the previous one.
2) when the user is entering the first record then just set the sort_key to 10E33.
3) on the off-chance that you do insert a great number of records and cannot insert another in between then you would need to alert the user, process the records so that the sort_keys are evenly spaced and requery the block. this processing could be scheduled nightly to make this eventuality even less likely.
4) make sure the user cannot run the default 'clear_record' procedure. this would break my method as well as yours!
James.

GUI component for horizontal multi-record blocks?

Hi,
is there a GUI component in ADF to show multi-record blocks (e.g. with af:inputText, af:inputListOfVAlues) which repeats the record not vertical but horizontal?
regards
Peter

Hello Shay,
With your help I managed the horizontal layout with af:foreach too.
                <af:panelGroupLayout binding="#{backing_we_vertical.panelGroupLayout2}"
                                     id="panelGroupLayout2" layout="horizontal">
                  <af:forEach var="row"
                              items="#{bindings.Lieferanten.rangeSet}">
                    <af:inputText value="#{row.Code}" id="inputText1"/>
                  </af:forEach>
                </af:panelGroupLayout>But the same with af:iterator doesn't work (records are still shown in vertical layout)
                <af:panelGroupLayout binding="#{backing_we_vertical.panelGroupLayout2}"
                                     id="panelGroupLayout2" layout="horizontal">
                  <af:iterator binding="#{backing_we_vertical.iterator1}"
                               id="iterator1"
                               var="row"
                               value="#{bindings.Lieferanten.collectionModel}">
                    <af:inputText value="#{row.Code}" id="inputText1"/>
                  </af:iterator>
                </af:panelGroupLayout>here my pagedef:
<?xml version="1.0" encoding="UTF-8" ?>
<pageDefinition xmlns="http://xmlns.oracle.com/adfm/uimodel"
                version="11.1.1.49.49" id="we_verticalPageDef"
                Package="view.pageDefs">
<parameters/>
<executables>
    <iterator id="TestIterator" Binds="Lieferanten" RangeSize="25"
              DataControl="AppModuleDataControl"/>
</executables>
<bindings>
    <tree IterBinding="TestIterator" id="Lieferanten">
      <nodeDefinition DefName="model.view.lov.tlsboblag.Lieferanten">
        <AttrNames>
          <Item Value="Code"/>
          <Item Value="Bezeichnung"/>
        </AttrNames>
      </nodeDefinition>
    </tree>
</bindings>
</pageDefinition>Where is my mistake?
I'll also try the capabilities of pivottable.
regards
Peter

Record blocking in Oracle

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