Data block and push button

Hi
I have a data block where I need that the first two items are a push button.
Now when user want to insert a new record, if you have a text item, since the cursor is in the text item, you can enter a new record.
Now with the push button, I cannot click on it before i click on a text item (which in fact create the new line)
How to have a push button which is able to create a new record like a text item does?

In fact the original problem is :
if you have a row in a data block that start with a push button. and then many text item, you are obliged to put the cursor on one text item of a new record to get the button working. The button is by default disable and cannot be used to create a new record.
If I put the button as a default button, the query is not executed. That the original problem

Similar Messages

I bought an ipad for my 6 yr old granddaughter. While exploring and pushing buttons she inadvertently went to settings and turned on restrictions. now i do not know the password to turn off. any way to reset so i can get app downloads?

i bought an ipad for my 6 yr old granddaughter. While exploring and pushing buttons she inadvertently went to settings and turned on restrictions. now i do not know the password to turn off. any way to reset so i can get app downloads?

http://manuals.info.apple.com/en_US/ipad_user_guide.pdfhttp://manuals.info.apple.com/en_US/ipad_user_guide.pdf
will tell you how
Also see this thread
https://discussions.apple.com/message/17406664#17406664

Data Blocks and the Elapsed Time

Hi,
I have created 3 tables with one column only. As an example Table 1 below:
SQL> create table T8k( x char(2000));
So 3 tables are created in this way i.e. T8k,T16K and T4K
T8 = in the default database tablespace of 8k (11g v11.1.0.6.0 - Production) (O.S=Windows).
T16 = I created in a Tablespace with Blocksize 16k.
T4K = I created in a Tablespace with Blocksize 4k. In the same Instance.
Each table has 290,000 rows and all the 3 tables have equal size of 555MB (2006(rowsize with overhead) * 290,000/1024/1024 = 555MB) to test Elapsed Time (set timing on).
As these 3 tables are created under different block sizes so the allocated no. of data blocks are different as below:
T8K = 97177 BLOCKS= 00:41:20.21 (Elapsed Time)
T16K=41639 BLOCKS= 00:44:11.59
BT4K=293656 BLOCKS=00:37:29.06
Please note the difference. First table i.e. 8k block size, allocated blocks are 97177 and taking around 41 mins. Third table i.e. BT4K (in a 4k block size tablespace), allocated blocks(293656 ) are almost 3 times bigger, taking around 37 mins to execute the query. I mean the difference is only 4 mins hardly and blocks difference is 3 times.
In case of any doubt, I've created these tables bigger than the memory used for my db(memory_max_size 408M) i.e. 555 MB that If Blocks are already in cache then reading the blocks and counting the rows will nearly be the same regardless of the block sizes or the number of blocks.
Need solid suggestions and if possilble, links also which has some serious discussions regarding my issue.
Bundle of thanks.
Best Regards,

Because I was not completely satisfied with the things last time. It doesn't seem so simple to me as people said
I thought may some guru have a look today, not just to point out that i have created it again.
And I have compact my question to avoid confusion.

Radio button in selection screen and push button

Hi experts,
I want to give radio button in selection screen side by side.
how we can do this on slection screen.
secondly i want to resize push button on selection screen.
please provide me the exact solution.
thanks
babbal

Hi babbal,
For Your Requriment yo can go to tcode se51 & then give ur program name & give screen number as 1000 because 1000 is default screen for all the programs and in se51 Press Layout button & then you can make changes to the Selection screen according to your requriment
Hope it will be Helpfull.......!!
Thanks & Regards,
Bhushan

Relationship between a data block and latch

Hello Experts,
I have just read an article about indexes and full table scan by Richard Foote. http://richardfoote.wordpress.com/2009/04/16/indexes-on-small-tables-part-i-one-of-the-few/
I thought each block required only one latch for each operation. However, I don't undersand that why a single block required 2 latch? The qoute is the following,
Note that yes indeed, there were 4 consistent gets performed and that none of the consistent gets were the “cheaper” consistent gets examinations. Therefore, the 4 consistent gets used in performing the FTS of the one block table required 4 x 2 = 8 latches.
Can anyone explain the above quote please?
Thanks in advance.

Jonathan Lewis wrote:
Solomon Yakobson wrote:
Read Concepts manual. Database Buffer Cache in particular:Every buffer has an access mode: pinned or free (unpinned).
I hope the manual doesn't use the word "free" as a synonym for "unpinned", since a buffer (header) with state = "free" is one that doesn't hold a copy of a datablock and is therefore immediately available for re-use.
Regards
Jonathan Lewis
Hello Sir,
I have just read Memory Architecture document, buffer states part, I know the meaning of dirty buffers. However, when we just SELECT any table, the corresponding data blocks that read into memory from disk, are they considered as clean buffers? Because as far as I understand from dirty buffers, these are modified buffers. And maybe the manual should have used "clean" instead of "free"?
The database uses a sophisticated algorithm to make buffer access efficient. Pointers to dirty and nondirty buffers exist on the same least recently used (LRU) list, which has a hot end and cold end. A coldbuffer is one that has not been recently used. A hot buffer is frequently accessed and has been recently used
Also the above statement is excerpt from Oracle Memory Architecture document, does the nondirty buffers refer to data blocks that move to the memory in SELECT query?
Thanks a lot for your remarkable thoughts.

Text Items And Push Buttons Created on a customized form does not appear.

Hi,
I created a custom form and attached it to ebs. The form opens without any error.
I had 3 text items and 2 push buttons with proper property class applied to them. But I am only able to see the prompt of the first text item. All the other widgets are not visible. What could be the possible cause for this.
Deepak

How are you running the form? Have you deployed it properly and attached it to a menu/form function and are viewing it within EBS?
Did you open the TEMPLATE.fmb form and save a copy of it as the starting point for your custom form?
--Johnnie

Edges of rollover and push buttons

I am using pushbutton and rollover buttons in my toolbar,
so I want to make all buttons look like the same
a rollover button has its edges like an arc
and a push buttons has its edges straight(like a square)
how can i either make edges of rollover button straight
or can make edges of push buttons look like an arc
please help me

How are you running the form? Have you deployed it properly and attached it to a menu/form function and are viewing it within EBS?
Did you open the TEMPLATE.fmb form and save a copy of it as the starting point for your custom form?
--Johnnie

Data block and storage procedure

Hi,
I have problem with form that is build on storage procedure.
When I compile form i get error:
Compilation error on DELETE-PROCEDURE trigger on BLOCK22 data block:
ERROR PL/SQL 306 in line 7, column 1
wrong number or types of arguments in call to 'POPULATE_TABLE'
ERROR PL/SQL 0 in line 7, kcolumn 1
Statement ignored
Table:
CREATE TABLE LOKALIZACJE
(     ID_LOK INTEGER,
     ADRES VARCHAR2(40),
     OPIS VARCHAR2(80));
Package:
create or replace package pkg_lok_1 is
type lok_rec is record
(id_lok lokalizacje.id_lok%type,
adres lokalizacje.adres%type,
opis lokalizacje.opis%type);
TYPE return_cur IS REF CURSOR RETURN lokalizacje%ROWTYPE;
TYPE return_tab IS TABLE OF lok_rec;
PROCEDURE wyswietl (param_return_rec IN OUT return_cur);
PROCEDURE usun (p_emp_table IN OUT return_tab);
END pkg_lok_1;
CREATE OR REPLACE PACKAGE BODY pkg_lok_1 AS
PROCEDURE wyswietl (param_return_rec IN OUT return_cur) IS
BEGIN
OPEN param_return_rec FOR
SELECT * FROM lokalizacje;
END wyswietl;
PROCEDURE usun (p_emp_table IN OUT return_tab) is
BEGIN
delete lokalizacje
where id_lok=p_emp_table(0).id_lok;
END usun;
END pkg_lok_1;
end trigger delete-procedure
DECLARE
bk_data PKG_LOK_1.RETURN_TAB;
BEGIN
PLSQL_TABLE.POPULATE_TABLE(bk_data, 'BLOCK22', PLSQL_TABLE.DELETE_RECORDS);
PKG_LOK_1.USUN(bk_data);
END;
Procedure wyswietl work fine but form doesn't comiple when I use procedure usun.
Where is problem? Colud someone help me?
james

Perhaps, you block have a non database items but they is declared as database.

Query on data block and Operating system block

Hi ,
Does data base requests data in term's of Data blocks or operating system block's . If data block's , how an data block get accessed the operating system block . what are the advantages over separating the data blocks from the operating system block's . can any one please explain the what happens once the data base requests the data ?
Thank You

sybrand_b wrote:
This place is called 'Oracle Forum' It does not offer the Oracle University curriculum for free, nor does it offer free abstracts of the Oracle Concepts Manual.
Kindly read the Concepts Manual of your unmentioned version yourself.
Thank you.
Sybrand Bakker
Senior Oracle DBADear Sybrand
As you said, this place is called Forum. If you know answer, then answer the question. If you know the documentation, then refer to documentation. If you don't know the answer, then don't answer in such rough manner! Just stop. Just don't type anything. Just be polity

Otomatic set text and push button

I want to ask one question about ASP.NET htmlparser.
I want to go one url and i want to find textboxes and buton .
After that i will set a value in this textbox and i will push the button.But i want to work this otomatically.I used agilepackage and i went to adress otomatically,i wrote XPATH and i found what i want to textbox and i set in my code
this XPATH.
var node =document.DocumentNode.SelectSingleNode("/html/body/div/div/div/article/form/input");
But this node is null ...I want to text website's textbox element.
How can i take text box. I will set textbox like down code.
node.SetAttributeValue("lookupTarget","blabla");
After that i will buton XPATH adress like node and i will RaiseEvent("onclick")
HtmlElement button = doc.GetElementById("btnbuton");
button.RaiseEvent("onclick");
Thanks for help.

Hello,
This forum is used to discuss and ask questions about .NET Framework Base Classes (BCL) such as Collections, I/O, Regigistry, Globalization, Reflection. Also discuss all the other Microsoft libraries that are built on or extend the .NET Framework, including
Managed Extensibility Framework (MEF), Charting Controls, CardSpace, Windows Identity Foundation (WIF), Point of Sale (POS), Transactions.
For issues regarding Xpath, there is a specific forum, I will move this issue to there for a better help.
Edit:
Oh, I am very sorry for my mistake that I move your thread to this wrong forum. You can ask it here:
http://social.msdn.microsoft.com/Forums/en-US/home?forum=xmlandnetfx
Really sorry.
Thanks for your understanding.
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
Click
HERE to participate the survey.

How to disable block and delete button in me22n transaction

Hi experts !,
as per my requirement i want to disable delete and block button in me23n . for this i wrte my logic but problem
is when my logic satisfies then i want to disabele those two buttons . those block button function code is 'MEPO1211LOCK'
if it is screen field we can use loop at screen and input = 0 . but here it is funtion code how to disable this funtion code as per
condition .
i tried this SET PF-STATUS ' pf status name ' EXCLUDING ' fucntion code name '. also but not working ..
if any one have any idea pls share ......

Hello Experts,
I have similar requirement. Please help....

Data Charts and Radio Buttons

Hello,
I'm new to flex and need some help with a project of mine. I
want to be able to take a poll (using Radio Buttons) and create
from that info a chart. I've tried everything I know how, but I
can't get it to work. I know I need a dataprovider tag somewhere
but how to create the data from that poll to create the model and
the data provider? Any help would be great.
Thanks,
Olsen

A dataProvider for a chart (or list) is based on one of the
Collection classes, usually ArrayCollection. So if you want to
create a chart of say the number of people who responded to a
question broken down by their ages, you might have a table like
this:
Age Response
18 a
22 b
23 a
18 b
etc.
That tells me you want use an ArrayCollection:
[Bindable] private var chartData:ArrayCollection;
chartData = new ArrayCollection();
chartData.addItem( { age:18, value:"a"} );
chartData.addItem( {age:22, value:"b"} );
etc.
Now you have an ArrayCollection of Objects, each of which has
an age property and a value property. Now you can apply this to a
chart:
<mx:ColumnChart dataProvider="{chartData}"... >
<mx:series>
<mx:ColumnSeries yField="value" />
</mx:series>
<mx:horizontalAxis><mx:CategoryAxis
categoryField="age" dataProvider="{chartData}"
/></mx:horizontalAxis>
</mx:ColumnChart>
You can define the chart in MXML and modify or create the
data in ActionScript.

'Create' Push button is not working in BDC and LSMW while uploading G/L master data

Hello Experts:
I am facing the following problem:
While uploading G/L master data with the BDC program, 'create' push button is not working even after executing following lines.
PERFORM BDC_DYNPRO      USING 'SAPLGL_ACCOUNT_MASTER_MAINTAIN' '2001'.
PERFORM BDC_FIELD       USING 'BDC_OKCODE'
                               '=ACC_CRE'.
Create G/L account screen is not coming in BDC. Please suggest me what to do.
Thanks !!

Re: 'Create' Push button is not working in BDC and LSMW while uploading G/L master data
Re: 'Create' Push button is not working in BDC and LSMW while uploading G/L master data
Hi Glen Anthony
Thank you for the reply Glen Anthony please take a look at the following code.
REPORT ZFI_BDC_FS00
        NO STANDARD PAGE HEADING LINE-SIZE 255.
*INCLUDE BDCRECX1.
TYPES : BEGIN OF STR,
   BUKRS TYPE GLACCOUNT_SCREEN_KEY-BUKRS,        "Company Code
   SAKNR TYPE GLACCOUNT_SCREEN_KEY-SAKNR,        "G/L Account Number
   KTOKS TYPE GLACCOUNT_SCREEN_COA-KTOKS,        "G/L Account Group
   XPLACCT TYPE GLACCOUNT_SCREEN_COA-XPLACCT,    "P&L statement account
   XBILK TYPE GLACCOUNT_SCREEN_COA-XBILK,        "Indicator: Account is a balance sheet account?
   TXT20_ML TYPE GLACCOUNT_SCREEN_COA-TXT20_ML, "G/L account short text
   TXT50_ML TYPE GLACCOUNT_SCREEN_COA-TXT50_ML, "G/L account short text
   WAERS TYPE GLACCOUNT_SCREEN_CCODE-WAERS,      "Account currency
   XSALH TYPE GLACCOUNT_SCREEN_CCODE-XSALH,      "Indicator: Only Manage Balances in Local Currency
   MWSKZ TYPE GLACCOUNT_SCREEN_CCODE-MWSKZ,      "Tax Category in Account Master Record
   XMWNO TYPE GLACCOUNT_SCREEN_CCODE-XMWNO,      "Indicator: Tax code is not a required field
   MITKZ TYPE GLACCOUNT_SCREEN_CCODE-MITKZ,      "Account is reconciliation account
   XOPVW TYPE GLACCOUNT_SCREEN_CCODE-XOPVW,      "Indicator: Open item management?
   XKRES TYPE GLACCOUNT_SCREEN_CCODE-XKRES,      "Indicator: Can Line Items Be Displayed by Account?
   ZUAWA TYPE GLACCOUNT_SCREEN_CCODE-ZUAWA,      "Key for sorting according to assignment numbers
   FSTAG TYPE GLACCOUNT_SCREEN_CCODE-FSTAG,      "Field status group
   XINTB TYPE GLACCOUNT_SCREEN_CCODE-XINTB,      "Indicator: Is account only posted to automatically?
   END OF STR.
DATA : ITAB TYPE TABLE OF STR WITH HEADER LINE,
        IT_BDCDATA TYPE TABLE OF BDCDATA WITH HEADER LINE,
        TXT(4096) TYPE C OCCURS 0,
        MSG TYPE STRING,
        COUNT(5) TYPE N.
SELECTION-SCREEN : BEGIN OF BLOCK B1 WITH FRAME TITLE TEXT-001.
   PARAMETERS : MY_FILE TYPE RLGRAP-FILENAME.
SELECTION-SCREEN : END OF BLOCK B1.
AT SELECTION-SCREEN ON VALUE-REQUEST FOR MY_FILE.
CALL FUNCTION 'F4_FILENAME'
EXPORTING
    PROGRAM_NAME        = SYST-CPROG
    DYNPRO_NUMBER       = SYST-DYNNR
*   FIELD_NAME          = ' '
IMPORTING
    FILE_NAME           = MY_FILE
CALL FUNCTION 'TEXT_CONVERT_XLS_TO_SAP'
   EXPORTING
*   I_FIELD_SEPERATOR          =
*   I_LINE_HEADER              =
     I_TAB_RAW_DATA             = TXT
     I_FILENAME                 = MY_FILE
   TABLES
     I_TAB_CONVERTED_DATA       = ITAB[]
EXCEPTIONS
    CONVERSION_FAILED          = 1
    OTHERS                     = 2
IF SY-SUBRC <> 0.
* IMPLEMENT SUITABLE ERROR HANDLING HERE
ENDIF.
START-OF-SELECTION.
COUNT = 0.
LOOP AT ITAB.
*PERFORM OPEN_GROUP.
REFRESH IT_BDCDATA.
PERFORM BDC_DYNPRO      USING 'SAPLGL_ACCOUNT_MASTER_MAINTAIN' '2001'.
PERFORM BDC_FIELD       USING 'BDC_CURSOR'
                               'GLACCOUNT_SCREEN_KEY-BUKRS'.
PERFORM BDC_FIELD       USING 'BDC_OKCODE'
                               '=ACC_CRE'.
*PERFORM BDC_FIELD       USING 'BDC_CURSOR'
*                              'GLACCOUNT_SCREEN_KEY-BUKRS'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_KEY-SAKNR'
                               ITAB-SAKNR. "'5'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_KEY-BUKRS'
                               ITAB-BUKRS. "'TATA'.
PERFORM BDC_DYNPRO      USING 'SAPLGL_ACCOUNT_MASTER_MAINTAIN' '2001'.
PERFORM BDC_FIELD       USING 'BDC_OKCODE'
                               '=2102_GROUP'.
PERFORM BDC_FIELD       USING 'BDC_CURSOR'
                               'GLACCOUNT_SCREEN_COA-KTOKS'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_COA-KTOKS'
                               ITAB-KTOKS. "'GL'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_COA-XPLACCT'
                               ITAB-XPLACCT. "'X'.
PERFORM BDC_DYNPRO      USING 'SAPLGL_ACCOUNT_MASTER_MAINTAIN' '2001'.
PERFORM BDC_FIELD       USING 'BDC_OKCODE'
                               '=2102_BS_PL'.
PERFORM BDC_FIELD       USING 'BDC_CURSOR'
                               'GLACCOUNT_SCREEN_COA-XBILK'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_COA-KTOKS'
                               ITAB-KTOKS. "'GL'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_COA-XPLACCT'
                               ITAB-XPLACCT. "''.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_COA-XBILK'
                               ITAB-XBILK. "'X'.
PERFORM BDC_DYNPRO      USING 'SAPLGL_ACCOUNT_MASTER_MAINTAIN' '2001'.
PERFORM BDC_FIELD       USING 'BDC_OKCODE'
                               '=TAB02'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_COA-KTOKS'
                               ITAB-KTOKS. "'GL'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_COA-XBILK'
                               ITAB-XBILK. "'X'.
PERFORM BDC_FIELD       USING 'BDC_CURSOR'
                               'GLACCOUNT_SCREEN_COA-TXT50_ML'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_COA-TXT20_ML'
                               ITAB-TXT20_ML. "'G/L ACCOUNT'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_COA-TXT50_ML'
                               ITAB-TXT50_ML. "'G/L ACCOUNT'.
PERFORM BDC_DYNPRO      USING 'SAPLGL_ACCOUNT_MASTER_MAINTAIN' '2001'.
PERFORM BDC_FIELD       USING 'BDC_OKCODE'
                               '=TAB03'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_CCODE-WAERS'
                               ITAB-WAERS. "'INR'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_CCODE-XSALH'
                               ITAB-XSALH. "'X'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_CCODE-MWSKZ'
                               ITAB-MWSKZ. "'*'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_CCODE-XMWNO'
                               ITAB-XMWNO. "'X'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_CCODE-MITKZ'
                               ITAB-MITKZ. "''.
PERFORM BDC_FIELD       USING 'BDC_CURSOR'
                               'GLACCOUNT_SCREEN_CCODE-ZUAWA'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_CCODE-XOPVW'
                               ITAB-XOPVW. "'X'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_CCODE-XKRES'
                               ITAB-XKRES. "'X'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_CCODE-ZUAWA'
                               ITAB-ZUAWA. "'1'.
PERFORM BDC_DYNPRO      USING 'SAPLGL_ACCOUNT_MASTER_MAINTAIN' '2001'.
PERFORM BDC_FIELD       USING 'BDC_OKCODE'
                               '=SAVE'.
PERFORM BDC_FIELD       USING 'BDC_CURSOR'
                               'GLACCOUNT_SCREEN_CCODE-XINTB'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_CCODE-FSTAG'
                               ITAB-FSTAG. "'G019'.
PERFORM BDC_FIELD       USING 'GLACCOUNT_SCREEN_CCODE-XINTB'
                               ITAB-XINTB. "'X'.
*PERFORM BDC_TRANSACTION USING 'FS00'.
CALL TRANSACTION 'FS00' USING IT_BDCDATA MODE 'E' UPDATE 'S'.
COUNT = COUNT + 1.
*PERFORM CLOSE_GROUP.
ENDLOOP.
CONCATENATE COUNT ' RECORDS UPDATED SUCCESSFULLY' INTO MSG.
MESSAGE MSG TYPE 'I'.
FORM BDC_DYNPRO USING PROGRAM DYNPRO.
   CLEAR IT_BDCDATA.
   IT_BDCDATA-PROGRAM = PROGRAM.
   IT_BDCDATA-DYNPRO   = DYNPRO.
   IT_BDCDATA-DYNBEGIN = 'X'.
   APPEND IT_BDCDATA.
ENDFORM.
*        INSERT FIELD                                                  *
FORM BDC_FIELD USING FNAM FVAL.
* IF FVAL <> NODATA.
     CLEAR IT_BDCDATA.
     IT_BDCDATA-FNAM = FNAM.
     IT_BDCDATA-FVAL = FVAL.
     APPEND IT_BDCDATA.
* ENDIF.
ENDFORM.

Data block's table layout complicate command button?

Why after I create a data block's layout using table format,
when I try to insert a command button into the canvas, the
button always appear like a concatenated buttons (i.e. if I have
5 rows in the tabular format for displaying the data block, my
command button becomes 5 buttons glued side by side together)?
Advice, anyone?

Hello Andy,
See, when you are attaching a command button to the data block
you created to show 5 rows, its definitely going to show you 5
buttons in a stack manner.
There are two ways to show one button.
1> You should create a control block (non base table) in the
form and attach the button there. Rows displayed property of
this block should be 1.
2> Open the property palette of the button in the data block.
Change the value of "No. of Items displayed property" to 1.
Hope this will solve your problem.
Wishes,
Anindya

Data Concurrency and Consistency ( SCN , DATA block)

Hi guys, i am getting very very very confused about how oracle implement consistency / multiversioning with regards to SCN in a data block and transaction list in the data block..
I will list out what i know so you guys can gauge me on where i am..
When a SELECT statement is issued, SCN for the select query is determined. Then Blocks with higher SCN are rebuilt from the RBS.
Q1) The SCN in the block implied here - is it different from the SCNs in the transaction list of the block ? where is this SCN store ? where is the transaction list store ? how is the SCN of the block related with the SCNs in the transaction list of the block ?
Q2) can someone tell me what happen to the BLOCK SCN and the transaction list
of the BLOCK when a transaction start to update to a row in the block occurs.
Q3) If the BLOCK SCN reflects the latest change made to the block and If the SCN of the block is higher then the SCN of the SELECT query, it means that the block has change since the start of the SELECT query, but it DOESNT mean that the row (data) that the SELECT query requires has changed.
Therefore why cant ORACLE just check to see whether the row has changed and if it has, rebuilt a block from the RBS ?
Q4) when ORACLE compares the BLOCK SCN, does it only SCAN for the BLOCK SCN or does it also SEARCH through the TRANSACTION LIST ? or it does both ? and why ?
Q5) is transaction SCN same as Transaction ID ? which is store in the RBS , the transaction SCN or ID ?
Q6) in short i am confuse with the relationship between BLOCK SCN, transaction list SCN, their location, their usage and relationship of the BLOCK SCN and transaction list when doing a SELECT, their link with RBS..
any gurus clear to give me a clearer view of what is actually happening ?

Hi Aman
Hmm agreed.So when commit is issued , what happens at that time?Simply put:
- The SCN for the transaction is determined.
- The transaction is marked as committed in the undo header (the commit SCN is also stored in the undo header).
- If fast cleanout takes place, the commit SCN is also stored in the ITL. If not, the ITL (i.e. the modified data blocks) are not modified.
So at commit, Oracle will replace the begin scn in the ITL with this scn
and this will tell that the block is finally committed is it?The ITL does not contain the begin SCN. The undo header (specifically the transaction table) contains it.
I lost here.In the ITL , the scn is transaction SCN or commit scn?As I just wrote, the ITL contains (if the cleanout occured) the commit SCN.
This sounds like high RBA information?What is RBA?
Commit SCNThis is the SCN associated with a committed transaction.
Begin SCNThis is the SCN at which a transaction started.
Transaction SCNAs I wrote, IMO, this is the same as the commit SCN.
Also please explain that what exactly the ITL stores?If you print an ITL slot, you see the following information:
BBED> print ktbbhitl[0]
struct ktbbhitl[0], 24 bytes     @44
      struct ktbitxid, 8 bytes    @44
         ub2 kxidusn              @44       0x0009
         ub2 kxidslt              @46       0x002e
         ub4 kxidsqn              @48       0x0000fe77
      struct ktbituba, 8 bytes    @52
         ub4 kubadba              @52       0x00800249
         ub2 kubaseq              @56       0x3ed6
         ub1 kubarec              @58       0x4e
      ub2 ktbitflg                @60       0x2045 (KTBFUPB)
      union _ktbitun, 2 bytes     @62
         b2 _ktbitfsc             @62       0
         ub2 _ktbitwrp            @62       0x0000
      ub4 ktbitbas                @64       0x06f4c2a3- ktbitxid --> XID, the transaction holding the ITL slot
- ktbituba --> UBA, used to locate the undo information
- ktbitflg --> flags (active, committed, cleaned out, ...)
- _ktbitfsc --> free space generated by this transaction in this block
- _ktbitwrp+ktbitbas --> commit SCN
HTH
Chris

Data block and push button

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