Delete or update

Short performance question:
Is it faster to delete a record physical or to update a flag that indicates the deleted state for further select operations?
delete from table where id = 9
or
update table set status = 'deleted' and id = 9
or
Thanks for help,
stefan

It's not a simple answer. It all depends on various factors such as volumes of data, the amount/rate of growth of data on that table, the selectivity and cardinality of the data etc. etc.
If you delete rows from a table then further inserted rows can re-use that space keeping the HWM of the datafile down and could provide better physical access times, however this will also depend on how well organised the data is which can be helped by the occassional re-organise being issued.
If you mark rows for deletion then you are still doing around as much work as a delete would take, but you are holding on to the space in the datafile. This could then have an impact on selecting data (depending on indexes etc.) as you are having to exclude records.
There's no right or wrong answer without knowing all the details.

Similar Messages

Software Update Server - Deleting old updates to make space for new ones

On Page 77 of the SystemImage_and_SW_Updatev10.4.pdf Apple recommends "deleting old updates to make space for new ones". I've looked and searched and yet to find a way to do this. The Server Admin interface and the command line options I've looked into don't appear to provide this option.
So I actually tried stopping the server, moving the updates from /usr/share/swupd/html to another location, starting the server, the server wouldn't start, moving the files back again, the server still won't start.
1. Does anyone know how you're supposed to "Delete old updates to make space for new ones"
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How to delete or Update the data in the MEAN table

Hello Gurus,
I would like to delete or update the data in the MEAN table...how to do it.
Precisely I would like to change the status of Main EAN Indicator (field HPEAN).
Kindly let me know ??
Rehards
Senthilll

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Insert, Delete and Update options in Table control

Experts,
I have writen code for Insert, Delete and Update options in Table control. They are not working properly...
can any one send the code for the above please...
Thanks in advance..

Hi,
Following steps will help you.
1.TOP-INCLUDE
DATA: ITAB1 LIKE KNA1 OCCURS 0 WITH HEADER LINE.
DATA: ITAB2 LIKE KNA1 OCCURS 0 WITH HEADER LINE.
DATA: WA LIKE KNA1.
DATA: ANT TYPE I,CUR TYPE I.
DATA: OK_CODE TYPE SY-UCOMM.
CONTROLS: TABCTRL TYPE TABLEVIEW USING SCREEN 100.
IN FLOWLOGIC
PROCESS BEFORE OUTPUT.
LOOP AT ITAB1 CURSOR CUR WITH CONTROL TABCTRL.
ENDLOOP.
PROCESS AFTER INPUT.
MODULE CLEAR_DATA.
LOOP AT ITAB1.
MODULE MOVE_DATA.
ENDLOOP.
ADD OK_CODE IN ELEMENT LIST. CLICK ON LAYOUT AND ADD TABLE CONTROL(name it as TABCTRL) AND PUSHBUTTONS AS FOLLOWS.
SELECT THE FIELDS FROM PROGRAM. SAVE CHECK AND ACTIVATE.
CLICK ON FLOWLOGIC EDITOR FROM APPLICATION TOOL BAR.
DOUBLE CLICK ON MODULE CLEAR_DATA.
write the in this module as below.
CLEAR ITAB2. REFRESH ITAB2.
DOUBLE CLICK ON MODULE MOVE_DATA.
write the code in this module as below.
APPEND ITAB1 TO ITAB2.
ACTIVATE PAI AND WRITE THE CODE AS BELOW.
CASE OK_CODE.
WHEN 'FETCH'.
SELECT * FROM KNA1 INTO TABLE ITAB1 UP TO 20 ROWS.
TABCTRL-LINES = SY-DBCNT.
WHEN 'ADD'.
GET CURSOR LINE CNT.
CNT = TABCTRL-TOP_LINE + CNT - 1.
CLEAR WA.
INSERT WA INTO ITAB1 INDEX CNT.
WHEN 'MODIFY'.
GET CURSOR LINE CNT.
READ TABLE ITAB2 INDEX CNT.
LOOP AT ITAB2.
MODIFY KNA1 FROM ITAB2.
ENDLOOP.
SELECT * FROM KNA1 INTO TABLE ITAB1.
WHEN 'EXIT'.
LEAVE PROGRAM.
ENDCASE.
SAVE,CHECK AND ACTIVATE ALL.
CREATE TCODE AND EXECUTE.
contact if u hv any issues regarding this code.
reward points,if it is useful.
Thanks,
Chandu.

Insert delete or update entry in Custom table from KONV entry changed

Hi All,
I have custom table ZKONV with only few required columns and should have same number of records as KONV has at any point in time.
KONV is a cluster table so its not readable from ORACLE level. So ZKONV is created. But I dont know how to keep these both tables in sync.
I need to perform insert delete or update entry in Custom table if insert delete or update happens on cluster table KONV from any transactions.
As KONV is a cluster table and does not have changed time stamp I am not able to know the number of records changed in perticulat time period.
Thanks,

Thanks for reply,
There is a Outside SAP system which needs to read KONV data to feed into their system, but as KONV is cluster table they are not able to read it from ORACLE level.
To solve this we are thinking to create a transparent Z-table and will fill it with KONV and catch Update, delete or Insert statement and do same on ZKONv.
Is this possible some how? by some database event or something....

Delete or update a line in a text file

Hi, I've got one problem and I hope anybody can help me.
I read a text file like this :
montext = 20204578
montext2 = 22132546
montext3 = 31321321
I want to know how I can delete or update a specific line in my text file.
thanks a lot.

I read a text file like this :
montext = 20204578
montext2 = 22132546
montext3 = 31321321
I want to know how I can delete or update a specific
line in my text file.Sure. read in the file with the Readers readLine()-method in a loop; if the line it read is the one that should be removed, don't add it (or use a counter variable, if you do it by numbers) to the output String.
If it's to be replaced, replace it at that moment, then add the new line to the string.
Write back the string into the old file (don't append) and you're done.
Answer provided by Friends of the Water Cooler. Please tell forum admin via 'Discuss the JDC Web Site' forum that off-topic threads should be supported
Thanks, Geoff, good idea!

VB code for fitting graphics, deleting pages, updating TOC

Thanks again to all who helped me to find the object model info and other specifics I needed for completing my VB project. I'm not sure if this will be of any use to those who helped me, but at least I can "pay it forward".
The following code snippets are from my live project, with a bunch of ancillary code stripped away. I think I included everything needed for these three bits of functionality (fit graphics proportionally to frames, delete pages, update TOC), but if I accidentally left out something important, let me know (respond to this thread, as I'm not able to monitor all the threads). Note that in some cases, the code expects values in variables to be set outside of this code. I'll trust that anyone using this code can do that, and I've noted where this takes place.
My document uses only single pages, not facing-page spreads, so code referencing spreads works for me--but if you're using actual spreads, you may need to change the code to reference pages instead of spreads. Please bear in mind, I'm pretty new to ID, so if I misunderstood how pages and spreads (or anything else) work, please be kind. It's working for me, and hopefully will for others.
Be advised that deleting spreads (and possibly even fitting graphics) with LOCKED content (in the case of deleting, if ANYTHING on the page is locked) will cause InDesign to CRASH. If you have locked content on your pages, unlock it first either manually or through code (I have code for that as well, if anyone needs it).
The code for deleting spreads allows you to specify the spreads to delete by LABEL. I haven't figured out (anyone?) how to set labels through ID itself, but I was able to do it in code.
Lastly, please be advised that the forum may not properly indent or format the code. If it doesn't look pretty, it's not my doing. :)
VB Code follows:
Dim InDesign As Object
Dim InDesignDocument As Object
Dim LinkCt As Integer
Dim SpreadsCt As Integer
Dim PageLabel As String
Dim TOCStylesCt As Integer
Dim i As Integer
Dim p As Integer
'Create an InDesign object reference and open the InDesign
'document specified by DocumentFilespec. Note that if InDesign
'is and the selected document are already open, the in-memory
'copies will be used.
Set InDesign = CreateObject("Indesign.Application.CS3")
Set InDesignDocument = InDesign.Open(DocumentFilespec)
'Loop through all linked graphic frames and fill
'frame proportionally.
LinkCt = CInt(InDesignDocument.Links.Count)
For i = 1 To LinkCt
InDesignDocument.Links(i).Parent.Fit 1718185072
Next i
'This code deletes selected spreads (or pages if not using facing
'pages). It expects each spread to have a label, and it expects
'an array DeletePages to contain a list of the labels for pages
'to be deleted. DeletePagesCt is a count of the total number of
'items in the DeletePages array
For i = 1 To DeletePagesCt
SpreadsCt = InDesignDocument.Spreads.Count
For p = 1 To SpreadsCt
PageLabel = Trim(InDesignDocument.Spreads(p).Label)
If PageLabel <> "" And DeletePages(i) = PageLabel Then
InDesignDocument.Spreads(p).Delete
Exit For
End If
Next p
Next i
'This code updates the Table of Contents for a given TOC Style Name
'(ExpectedTOCStyleName).
TOCStylesCt = CInt(InDesignDocument.TOCStyles.Count)
For i = 1 To TOCStylesCt
If InDesignDocument.TOCStyles.Item(i) = ExpectedTOCStyleName Then
InDesignDocument.CreateTOC InDesignDocument.TOCStyles.Item(i), True
Exit For
End If
Next i

If I understand your question correctly that you want to know how to give an object in InDesign a Script Label (not using a script), then below is how (I needed to do it for the templates I'm using in the current project I'm doing using VBscript). Hope I was able to help some one else for a change. :-)
Window > Automation > Script Label
Select the Object
Enter the text in the Script Label box

XmlIndex on table not allowing delete or update

Hi
Oracle and slqplus versions:
Oracle Database 11g Release 11.2.0.2.0 - 64bit Production
PL/SQL Release 11.2.0.2.0 - Production
CORE 11.2.0.2.0 Production
TNS for Solaris: Version 11.2.0.2.0 - Production
NLSRTL Version 11.2.0.2.0 - Production
I'm having a problem deleting and updating xml content in a table. The following code shows the problem I'm having.
Create a new test table and add an index:
create table test of XMLType xmltype store as binary XML;
CREATE INDEX test_xmlindex_ix ON test (OBJECT_VALUE) INDEXTYPE IS XDB.XMLIndex;add some xml content:
insert into test values (xmltype('<product_details id="10"></product_details>'));update the content:
UPDATE test SET OBJECT_VALUE = appendChildXML(OBJECT_VALUE, '/product_details', '<product id="20"><type></type><code></code></product>')
WHERE XMLEXISTS('/product_details[@id=10]' PASSING OBJECT_VALUE);Select the content to check all is as should be:
select * from test;
<product_details id="10">
<product id="20">
<type/>
<code/>
</product>
</product_details>Now delete the type node:
UPDATE test SET OBJECT_VALUE = deleteXML(OBJECT_VALUE, '/product_details/product[@id=20]/type')
WHERE XMLEXISTS('/product_details[@id=10]' PASSING OBJECT_VALUE);
1 row updated.Select the content to check all is as should be:
select * from test;
<product_details id="10">
<product id="20">
*<type/>*
<code/>
</product>
</product_details>Type node is still in the xml.
Now drop the XmlIndex that is on the table:
drop index test_xmlindex_ix;
Index dropped.Now try the delete again:
UPDATE test SET OBJECT_VALUE = deleteXML(OBJECT_VALUE, '/product_details/product[@id=20]/type')
WHERE XMLEXISTS('/product_details[@id=10]' PASSING OBJECT_VALUE);
1 row updated.
select * from test;The type node has been deleted.
<product_details id="10">
<product id="20">
<code/>
</product>
</product_details>Can anyone help with this problem as I need to have XmlIndexes on my tables and be able to update and delete content?
Cheers
Bruce.

Hi,
I don't reproduce the problem.
I'm on XE, but 11.2.0.2 nonetheless :
SQL*Plus: Release 11.2.0.2.0 Production on Mer. Nov. 2 11:31:58 2011
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Express Edition Release 11.2.0.2.0 - Production
SQL> create table test of XMLType xmltype store as binary XML;
Table created.
SQL> CREATE INDEX test_xmlindex_ix ON test (OBJECT_VALUE) INDEXTYPE IS XDB.XMLIndex;
Index created.
SQL> insert into test values (xmltype('<product_details id="10"></product_details>'));
1 row created.
SQL> UPDATE test
2 SET OBJECT_VALUE = appendChildXML(OBJECT_VALUE, '/product_details', '<product id="20"><type></type><code></code></product>')
3 WHERE XMLEXISTS('/product_details[@id=10]' PASSING OBJECT_VALUE);
1 row updated.
SQL> select * from test;
SYS_NC_ROWINFO$
<product_details id="10">
<product id="20">
    <type/>
    <code/>
</product>
</product_details>
SQL> UPDATE test
2 SET OBJECT_VALUE = deleteXML(OBJECT_VALUE, '/product_details/product[@id=20]/type')
3 WHERE XMLEXISTS('/product_details[@id=10]' PASSING OBJECT_VALUE);
1 row updated.
SQL> select * from test;
SYS_NC_ROWINFO$
<product_details id="10">
<product id="20">
    <code/>
</product>
</product_details>Maybe it'll make no difference but you should use an XMLType instance in appendChildXML :
appendChildXML(
OBJECT_VALUE
, '/product_details'
, xmltype('<product id="20"><type></type><code></code></product>')
)Does the NO_XML_QUERY_REWRITE hint solve the problem?
UPDATE /*+ NO_XML_QUERY_REWRITE */ test
SET OBJECT_VALUE = ...

Whats the best way to check table before form deletion or update ?

Hi, I have a func_staff table made up of a composite key - func_no and staff_id. I have a form where the datablock references this table.
I need to be able to check that before a func_no and staff_id combination on the form are written to the database that that combination does not already exist in the table.
What would be the code for that ? I've tried stuff like IF EXIST statements and even a select statement but I totally worded it it wrongly.
To DELETE an entry in that same table, would the best way to be create an LOV for both func_no and staff_id, the problem with that would be if a user selected a combination that does not exist ? Could I create a combined LOV that would populate each field ?? (this way I could be 100% sure that the selected combination is valid)
Thanks Peeps.

hi,
you can try and use the count(*), before deleting and updating
lets say
select count(*)
into l_count
from table_name
where column1 = :block.column1
and column2 = :block.column2;
if l_count <> 1
then
insert into..........
else
show error message;
raise form trigger failure;
end if;
similarly u can use l_count before deleting.
regards,
Mayank

Tell me creation ,deleted and updates of dropdownbyindex

hi
my name is praveen
my question iam designing a form related to webdynpro
in that iam creating two dropdownbyindex in that
1.userid2.Material id
sub: i require code samples and binding
i have to select the items form those and
1button:insert
2button:Retrieve
3buttton:delete
4thbutton:update
i have to click those buttons so that i can display in smae page in same table those upadates.
please tell me my questin to answer very immediately
because we are facing about code samples

Hi Praveen,
Go to layout of the view Create dropdownbyindexUI element
Create a node_userid having the attribute user_id and bind that attribute to texts property of the dropdown
write this code in doinit to populate values to the node
If all user ids are in an vector userid_vec
for (int i = 0; i <userid_vec.size; ++i)
    IPrivateApplicationView.Inode_useridElement element = wdContext.createnode_useridElement();
    element.setAtt1(userid_vec.ElementAt(i));
    wdContext.nodenode_userid().addElement(element);
bind an action to property onSelect. you can access the index of the selected element in the event handler in implementation
wdContext.nodenode_userid().getLeadSelection();
Link the onAction property of button to an action
Create an element of the node to which you should add these values
IPrivate<view name>.I<node name>Element element = wdContext.create<node name>Element();
element.set<attribute name>(wdContext.nodenode_userid().getElementAt(wdContext.nodenode_userid().getElementAt(wdContext.nodenode_userid().getLeadSelection()).getAttributeValue(" user_id").toString());));
wdContext.node<node name>().addElement(element);
Like this for deleting you can loopthrough the node from which you have to delete and identify the element
int index = 0;
for(int i = 0;i<wdContext.node<node name>().size;i++)
wdContext.node<node name>().get<node name>Elementat(i).getAttributevalue("user_id").equals(<Selected element>)
index = i;
Once you get the element you can remove it from table
wdContext.node<node name>().removeElement(wdContext.node<node name>().get<node name>ElementAt(index)
For update you once you get the index you can go to the element and modify it
What do you mean by retreiving the element?
Hope this helps you
Regards
Rohit

Bug: halt when deleting unneeded update files

If WSUS installed on a heavy IO loaded harddrive (LUN) of a VM, when deleting unneeded update files by Server Cleanup Wizard, MMC node may halt.
Server OS: Windows Server 2012 Standard
Errors can be located in Event Log:
An unhandled exception occurred and the process was terminated.
Application ID: /LM/W3SVC/1881423753/ROOT/ServerSyncWebService
Process ID: 3288
Exception: System.NullReferenceException
Message: Object reference not set to an instance of an object.
StackTrace: at Microsoft.UpdateServices.Internal.DataAccess.GetRevisionIdListForCache(Int64 deploymentChangeNumber, Int64& highestChangeNumber, CategoryIdCacheEntry[]&
newCategoryDeployments, CategoryIdCacheEntry[]& deletedCategoryDeployments, RevisionIdCacheEntry[]& newRevisionDeployments, RevisionIdCacheEntry[]& deletedRevisionDeployments)
at Microsoft.UpdateServices.Internal.RevisionIdCache.UpdateCategoryAndRevisionIdCache(Int64 deploymentChangeNumberAtRefresh)
at Microsoft.UpdateServices.Internal.ServerImplementation.UpdateCache()
at Microsoft.UpdateServices.Internal.ServerImplementation.DatabaseChangeHandler(Object byTimer)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.TimerQueueTimer.CallCallback()
at System.Threading.TimerQueueTimer.Fire()
at System.Threading.TimerQueue.FireNextTimers()
Application: w3wp.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.NullReferenceException
Stack:
at Microsoft.UpdateServices.Internal.DataAccess.GetRevisionIdListForCache(Int64, Int64 ByRef, Microsoft.UpdateServices.Internal.CategoryIdCacheEntry[] ByRef, Microsoft.UpdateServices.Internal.CategoryIdCacheEntry[]
ByRef, Microsoft.UpdateServices.Internal.RevisionIdCacheEntry[] ByRef, Microsoft.UpdateServices.Internal.RevisionIdCacheEntry[] ByRef)
at Microsoft.UpdateServices.Internal.RevisionIdCache.UpdateCategoryAndRevisionIdCache(Int64)
at Microsoft.UpdateServices.Internal.ServerImplementation.UpdateCache()
at Microsoft.UpdateServices.Internal.ServerImplementation.DatabaseChangeHandler(System.Object)
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.TimerQueueTimer.CallCallback()
at System.Threading.TimerQueueTimer.Fire()
at System.Threading.TimerQueue.FireNextTimers()
Faulting application name: w3wp.exe, version: 8.0.9200.16384, time stamp: 0x50108835
Faulting module name: KERNELBASE.dll, version: 6.2.9200.16384, time stamp: 0x5010ab2d
Exception code: 0xe0434352
Fault offset: 0x00000000000189cc
Faulting process id: 0xcd8
Faulting application start time: 0x01cdcff0fa98da3e
Faulting application path: c:\windows\system32\inetsrv\w3wp.exe
Faulting module path: C:\Windows\system32\KERNELBASE.dll
Report Id: 332ed25c-3c39-11e2-93f1-005056b26389
Faulting package full name:
Faulting package-relative application ID:
Step to repo:
1 Open Update Services MMC.
2 Click Options from the left panel.
3 Select Server Cleanup Wizard from the right.
4 Press Next.
MMC node MAY(only when lots of files need to be deleted) be prompted to be reset when deleting unneeded files if it's running longer than usual. Re-open Update Services MMC will fix it. But
it will be appeared again another day when many unneeded files exist.
Eternal Snow

Nothing to me indicated that his previous disks weren't functional.
In the very first two lines of the first post of this thread, the drive was described as "heavily loaded". Specifically the scenario was:
If WSUS installed on a heavy IO loaded harddrive (LUN) of a VM
Running the Server Cleanup Wizard, particularly performing the "Delete unneeded updates..." action is a highly database intensive action. If that task is competing for IOPS on the disk system, then there's absolutely a high probability that the task
will "timeout" before the stored proc being called can complete it's task.
The "fix" is to put the application on a properly equipped machine.
If the guys who wrote the system can't create it to not fall over if the HDs it's on happen to be a wee bit slow, then yes it's a bug and they've written it badly.
We're not talking about "a wee bit slow", though, are we?
As for timeout issues, it's a natural artifact of a WSUS server these days. Read every tenth thread in this forum and somebody is having issues with timeout errors.
There are two contributing factors. The first is that the number of updates currently contained in the MU catalog is about 100x the number of updates that existed when WSUS v3 was originally written in 2007.
The second is that in 95% of the cases, the administrator reporting the issue failed to properly performed needed administrative and maintenance activities on the WSUS server over the lifespan of the server.
Lawrence Garvin, M.S., MCITP:EA, MCDBA, MCSA
SolarWinds Head Geek
Microsoft MVP - Software Packaging, Deployment & Servicing (2005-2013)
My MVP Profile: http://mvp.microsoft.com/en-us/mvp/Lawrence R Garvin
http://www.solarwinds.com/gotmicrosoft
The views expressed on this post are mine and do not necessarily reflect the views of SolarWinds.

ABAP Program to delete the update rules

Hi guys,
Is there any ABAP Program to delete the update rules if any body knows.

Hi dear,
try with FM RSAU_UPDR_DELETE...
Hope it helps!
Bye,
Roberto
...and please dont forget to reward the answers...it-s THE way to say thanks here !

Deleting and updating records in a database table

dear all ,
i have created a databse table to which i have to update and delete records thru my program whixh i am unable to do so plz help me.

Hi Sonu,
To delete and update the records in your database table, you can create a Function Group and all the necessary function modules for it. This will a good approach as this will separate the database interface logic and the business logic. You need to use the DELETE and UPDATE ABAP keywords to delete and update the records of the database tables. Have a look at the ABAP Keyword documentation for a complete details of the usage.
Have a look at the following link:
DELETE
http://help.sap.com/saphelp_nw04/Helpdata/EN/fc/eb3aef358411d1829f0000e829fbfe/frameset.htm
UPDATE
http://help.sap.com/saphelp_nw04/Helpdata/EN/fc/eb3aef358411d1829f0000e829fbfe/frameset.htm
Hope this will help.
Thanks,
Samantak.

All self-hosted web fonts are deleted after update to latest Muse version (2014.3)

All the self-hosted web fonts are deleted after updating Muse.
It is necessary to import the self-hosted fonts again and then redefine every paragraph style to make it work again.
This is an extra hour of work for every site using self-hosted fonts.
Please make sure to improve this on the next update-release of Adobe Muse.
Thanks

Hi Abhishek,
the site is directly uploaded using MUSE Upload to ftp host. When I open it with ftp client, there is off file of etelkawidemedium in fonts file.
And I have tried to upload plain webpage with the same web font - not made in Muse and it works.
http://www.golfklubk.cz/testwebfont/
So what should I do?
The answer from Shaun is little bit complicated for me:)
Thanks, Elena

Hi i need help. :( how will I be able to locate and delete those update that were partially downloaded? thank you! :)

hi i need help. how will I be able to locate and delete those updates that were partially downloaded? thank you!

How to remove partially downloaded files in 10.6
Hope this helps.

Read-through/write-behind and queued deletes (and updates)

Hi,
If I am changing the state of objects in a cache and using the write-behind and read-through mechanism what happens when I have deleted or updated an object in the cache but the change has not yet been committed to the database?.
If I delete and object in the cache and the delete DB operation is being queued and during this time try and perform a get against the key for the object is the value read through from the database or is it ignored since the database delete is pending?
For updates I presume that the value in the cache will be used - as the value exists in the cache and a read-through from the database will not be triggered.
Can you clarify the behavior of Coherence under these circumstances, particularly that of a pending delete.
Thanks,
Dave

Hi Dave,
If I am changing the state of objects in a cache and
using the write-behind and read-through mechanism
what happens when I have deleted or updated an object
in the cache but the change has not yet been
committed to the database?.
If I delete and object in the cache and the delete DB
operation is being queued and during this time try
and perform a get against the key for the object is
the value read through from the database or is it
ignored since the database delete is pending?I seem to remember a forum post mentioning that the removes from a write-behind cache are performed synchronously (they are done as part of the backingMap.remove(key)) operation so even if there are were pending updates in the write-behind queue. If I remember correctly, then the above mentioned problem cannot happen.
>
For updates I presume that the value in the cache
will be used - as the value exists in the cache and a
read-through from the database will not be
triggered.
Exactly.
Best regards,
Robert

Delete or update

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