Using workspaces with large tables

Hello
I've got a few large tables (6-10GB+) that will have around 500k new rows added on a daily basis as part of an overnight batch job. No rows are ever updated, only inserted or deleted and then re-inserted. I want to stop the process that adds the new rows from being an overnight batch to being a near real time process i.e. a queue will be populated with requests to rebuild the content of these tables for specific parent ids, and a process will consume those requests throughout the day rather than going through the whole list in one go.
I need to provide views of the data asof a point in time i.e. what was the content of the tables at close of business yesterday, and for this I am considering using workspaces.
I need to keep at least 10 days worth of data and I was planning to partition the table and drop one partition every day. If I use workspaces, I can see that oracle creates a view in place of the original table and creates a versioned table with the LT suffix - this is the table name returned by DBMSMW.GetPhysicalTableName. Would it be considered bad practice to drop partitions from this physical table as I would do with a non version enabled table? If so, what would be the best method for dropping off old data?
Thanks in advance
David

I've just spotted the workspace manager forum, I'll post there. :-)

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Can ui:table deal with large table?

I have found h:dataTable can do pagination because it's data source is just a DataModel. But ui:table's datasouce is a data provider which looks some complex and confused.
I have a large table and I want to load the data on-demand . So I try to implement a provider. But soon I found that the ui:table may be load all data from provider always.
In TableRowGroup.java, there are many code such as:
provider.getRowKeys(rowCount, null);
null will let provider load all data.
So ui:table can NOT deal with large table!?
thx.
fan

But ui:table just uses TableDataProvider interface.TableData provider is a wrapper for the CachedRowSet
There are two layers between the UI:Table comonent and the database table: the RowSet layer and the Data Provider layer. The RowSet layer makes the connection to the database, executes the queries, and manages the result set. The Data Provider layer provides a common interface for accessing many types of data, from rowsets, to Array objects, to Enterprise JavaBeans objects.
Typically, the only time that you work with the RowSet object is when you need to set query parameters. In most other cases, you should use the Data Provider to access and manipulate the data.
What can a CachedRowSet (or CachedRowSetprovider?)
do?Check out the API that I pointed you to to see what you can do with a CachedRowSet
Does the Table cache the data itself?
Maybe this way is convenient for filter and order?
Thx.I do not know the answers to these questions.

Dramatic slowdown with large tables--common problem?

I opened an excel .xls file in Numbers. The file has one sheet and on that sheet is a table with 45,000 rows and 7 columns, including a date column. I was surprised to experience response times between 30 - 60 seconds for doing tasks like adjusting column widths and formatting the date column. Sorting and filtering also took > 30 seconds, each time I changed something (sort order, filter criteria). There are no formulas in the table at this point--just data.
I hacked off 3/4 of the rows to get the table below 10,000 rows and did the same tasks. The times were roughly proportionately shorter, but still still pretty long compared to Excel on Windows.
I'm running a Mac Pro with 2 quad-core processors and six GB of memory, so I don't think the problem is hardware. (When I run the same tasks in Windows on the same machine the response time is instantaneous for all tasks).
Is this a problem with Numbers that anyone with large tables will experience, or is it likely to be something wrong with my particular installation of Numbers (I'm on the most recent version of Numbers)?

Hello
The Terms of use which you MUST have read claims:
+to help you resolve issues, ask questions, get tips and advice, and more.+
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A quick search with the keyword "speed" would have already tell you that : yes, Numbers is slow !
Yvan KOENIG (from FRANCE lundi 25 février 2008 20:46:52)

Passing values to an internal table and use it with the table painter

Hi,
I have seen this topic here before but the answers didn't help me. Maybe I,m doing something wrong.
The problem is that I defined the following structure on the |Types| tab of the |Global Definitions| section:
TYPES: BEGIN OF DETAILS,
       EBELP TYPE EKPO-EBELP,
       BSMNG TYPE EBAN-BSMNG,
       LFDAT TYPE RM06P-LFDAT,
END OF DETAILS.
Then defined the following definition on the |Global Data| section:
WA_DETAILS TYPE STANDARD TABLE OF DETAILS WITH HEADER LINE
The problem is that when I try to assign a value to one of the fields in the program code like this:
LOOP AT WA_EKPO.
     WA_DETAILS-EBELP = WA_EKPO-EBELP.
     WA_DETAILS-EMATN = WA_EKPO-EMATN.
     MODIFY WA_DETAILS.
ENDLOOP.
gives me the following error:
"WA_DETAILS" is not an internal table -the "OCCURS n" specification is missing.
Then if I add the "OCCURS 10" to the definition of the Global Data the error "OCCURS 10" is not expected.
How can I define, assign values and use as a parameter an internal table defined with types for use it with the table painter?

Hi,
if it is one record in wa_details. you can directly write as follows..
REPORT ZCR_TEST1                               .
TYPES: BEGIN OF details,
          ebelp TYPE ekpo-ebelp,
          bsmng TYPE eban-bsmng,
          lfdat TYPE rm06p-lfdat,
          ematn TYPE ekpo-ematn,
       END OF details.
DATA: wa_details TYPE STANDARD TABLE OF details WITH HEADER LINE,
      wa_ekpo    TYPE STANDARD TABLE OF details WITH HEADER LINE.
wa_details-ebelp = '1'.
append wa_details.
wa_ekpo-ebelp = '3'.
append wa_ekpo.
LOOP AT wa_ekpo.
wa_ekpo-ebelp = wa_details-ebelp.
wa_ekpo-ematn = wa_details-ematn.
modify wa_ekpo.
endloop.
Normally it wont be one record, so u need to put <b>read statement with key</b> in LOOP and ENDLOOP.
Regards,
Sriram

Address database perf with large tables for attachments (.doc,.jpg,.pdf..etc)

Hello Folks,
I have a database with large tables that contain attachments of various kinds of files such as *.doc, *.docx, *.xlsx, *.jpg, *.pdf, *, *.jpeg. Overtime this database has grown so quickly and quite a handful to maintain.
I've been thinking of a proper approach to redesign the database's tables' struct with a little change on the application side.
How do you implement an idea in which the physical file attachment is not appended to these tables but instead just a path to that file which is located in another storage drive? Hence, the column's data type could be just a string rather than an image.
This topic first appeared in the Spiceworks Community

Hi,
I'm sorry you are having this problem, here is another post about the same problem, where the cause of the problem is described:
https://support.mozilla.com/en-US/questions/894442
A bug has been filed to track resolution of the issue here, because a true fix isn't yet available:
https://bugzilla.mozilla.org/show_bug.cgi?id=703015
I apologize for the inconvenience.
Regards,
Michelle

Problem using ViewObject with bc4j:table

Hello !!
This is the query of my ViewObject:
select * from speiseplan order by jahr desc, kw desc;
and everything works fine in the BC4J tester:
jahr kw
2003 52
2003 7
2003 3
2002 51
But in my uix page the rows are not correctly sorted:
jahr kw
2003 3
2003 7
2003 52
2002 51
What's going wrong here?
Thanks for your help.
Regards,
Mareike

Duplicate post.
Original problem using ViewObject with <bc4j:table>

Error in sync group with large tables

Since a few days ago the automated sync process configured in windows azure portal is failing. The following message appears
SqlException Error Code: -2146232060 - SqlError Number:40550,
Message: The session has been terminated because it has acquired too many locks.
Looking for the error on internet I've found the following post
http://blogs.msdn.com/b/sync/archive/2010/09/24/how-to-sync-large-sql-server-databases-to-sql-azure.aspx
Basically it says that in order to increase the application transaction size it's necessary to include some parameters in the remote and local provider. There's an example script for that.
But how can i apply this change if my data sync process was created through azure web portal? Is there a way to access the sync scripts? How can I increase the transaction size from azure portal?
Please, any help is welcome
Alvaro

Hi Alvaro,
I’m afraid that there’s no method to access the sync scripts and increase the transaction size from azure portal when using SQL Azure data sync group.
The error 40550 occurs when sessions consuming greater than one million locks. You can use the following DMVs to monitor your transactions in SQL Azure. Usually, the solution of this error is to read or modify fewer rows in a single transaction.
sys.dm_tran_active_transactions
sys.dm_tran_database_transactions
sys.dm_tran_locks
sys.dm_tran_session_transactions
In your scenario, to overcome the error 40550, I recommend you use the
bcp utility or SQL Server Integration Services (SSIS) to move data from large table to SQL Azure.
With bcp utility, you can divide your data into multiple sections and upload each section by executing multiple bcp commands simultaneously. With SSIS, you can divide your data into multiple files on the file system and upload each file by executing multiple
Streams simultaneously.
Reference:
Optimizing Data Access and Messaging - SQL Azure Connection Management
Thanks,
Lydia Zhang
If you have any feedback on our support, please click
here.
Lydia Zhang
TechNet Community Support

XSU: Dealing with large tables / large XML files

Hi,
I'm trying to generate a XML file from a "large" table (about 7 million lines, 512Mbytes of storage) by means of XSU. I get into "java.lang.OutOfMemoryError" even after raising the heap size up to 1 Gbyte (option -Xmx1024m of the java cmd line).
For the moment, I'm involved in an evaluation process. But in a near future, our applications are likely to deal with large amount of XML data, (typically hundreds of Mbytes of storage, which means possibly Gbytes of XML code), both in updating/inserting data and producing XML streams from existing data in relationnal DB.
Any ideas about memory issues regarding XSU? Should we consider to use XMLType instead of "classical" relational tables loaded/unloaded by means of XSU?
Any hint appreciated.
Regards,
/Hervi QUENIVET
P.S. our environment is Linux red hat 7.3 and Oracle 9.2.0.1 server

Hi,
I'm trying to generate a XML file from a "large" table (about 7 million lines, 512Mbytes of storage) by means of XSU. I get into "java.lang.OutOfMemoryError" even after raising the heap size up to 1 Gbyte (option -Xmx1024m of the java cmd line).
For the moment, I'm involved in an evaluation process. But in a near future, our applications are likely to deal with large amount of XML data, (typically hundreds of Mbytes of storage, which means possibly Gbytes of XML code), both in updating/inserting data and producing XML streams from existing data in relationnal DB.
Any ideas about memory issues regarding XSU? Should we consider to use XMLType instead of "classical" relational tables loaded/unloaded by means of XSU?
Any hint appreciated.
Regards,
/Hervi QUENIVET
P.S. our environment is Linux red hat 7.3 and Oracle 9.2.0.1 server Try to split the XML before you process it. You can take look into XMLDocumentSplitter explained in Building Oracle XML Applications Book By Steven Meunch.
The other alternative is write your own SAX handler and send the chuncks of XML for insert

Using SQL with Nested Table

Hi ,
Please assist as how can we do this thing
i have a nested table of object type
create or replace type a1 as object
a number,
b varchar2(30),
region varchar2(30)
create type a1_array s table of a1;
declare
v_a1 a1;
v_a1_array a1_array:=a1_array();
begin
v_a1= a1(1, '1' , 'AUS');
v_a1_array.EXTEND;
v_a1_array(1):=v_a1;
v_a1= a1(2, '2' , 'AUS');
v_a1_array.EXTEND;
v_a1_array(2):=v_a1;
v_a1= a1(3, '3' , 'NAM');
v_a1_array.EXTEND;
v_a1_array(3):=v_a1;
end;
Now, i have v_a1_array having 3 rows 2 with AUS region and one with NAM region.
Using SQL can i extract only 'AUS' rows and fetch in ARRAY OF TYPE v_a1_array (using Where clause and Table () functions )
Any help will be highly appreciated. Please assist. I have oracle 11g
Thanks

Hi,
GPU has already shown you how to do. I will just modify my original one:
SQL*Plus: Release 11.2.0.1.0 Production on Thu Aug 22 22:14:42 2013
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> set serveroutput on
SQL>
SQL> DECLARE
2     v_a1           a1;
3     v_a1_array     a1_array := a1_array ();
4     v_a1_array2    a1_array;
5 BEGIN
6     v_a1 := a1 (1, '1', 'AUS');
7     v_a1_array.EXTEND;
8     v_a1_array (1) := v_a1;
9     v_a1 := a1 (2, '2', 'AUS');
10     v_a1_array.EXTEND;
11     v_a1_array (2) := v_a1;
12     v_a1 := a1 (3, '3', 'NAM');
13     v_a1_array.EXTEND;
14     v_a1_array (3) := v_a1;
15
16     SELECT a1(a, b, region)
17       BULK COLLECT INTO v_a1_array2
18       FROM TABLE (v_a1_array)
19      WHERE region = 'AUS';
20
21     FOR c1 IN (SELECT *
22                  FROM TABLE (v_a1_array2))
23     LOOP
24        DBMS_OUTPUT.put_line ('A='||c1.a||', B='||c1.b||', REGION='||c1.region);
25     END LOOP;
26 END;
27 /
A=1, B=1, REGION=AUS
A=2, B=2, REGION=AUS
PL/SQL procedure successfully completed.
If you consider your question answered, please mark this thread as answered.
Regards.
Alberto

Problem with using partialTrigger with af:table

Hi,
My use case is search page. I am using two jsf fragments in one page.
One fragment is to specify the search conditions. I have search command button on that search fragment. And when user clicks on search page the result has to come in another fragment.
I am displaying the result in a <af:table> and total record in one label. I have bounded the <af:table> with RichTable in the backing bean. I have put partialTrigger on the searchButton of fragment one.
When i click on search the label of result fragment gets updated. But the table doesn't change or updated.
I have the frank's example with poll and i have tried putting <af:Table> inisde <af:form> and set the partialTrigger on af:form. But still it doesn't refresh the table.
Can any body help me on this?
Thanks in advance.
Regards,
Hiren

Hi Frank,
I am able to refresh the <af:outputText> which are there with <af:table>.
So here the problem is RichTable.
I can observe the following happening inside the ActionListener of Search Button.
1. I have printed the RowCount of richTable.
2. I have added two more columns into RichTable.
2. Then I reduced one element form the List (this list is used as datamodel for Af:table.
3 Now if after step #2 if I try to print the Rowcount of RichTable then I can see that the rowCount is decreased by 1.
So after this other components inside page are getting refreshed. And also I can see that two columns are added into af:table.
But the rows of table are not getting refreshed. It is showing old data only.
Can anybody provide their input where I am missing.
Has anyone got the example which refreshes the data of <af:table> bound to RichTable ?
It will really help me.
- Hiren

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I was wondering if it is plausible to use spy's Auto suggest
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What are the limitations of using spry with this kind of
overhead?
My current Situation
I currently have a cfc that returns a query which is then
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At this time the xml that is created only contains around 500
rows but when this is all hooked up to spry's auto suggest feature
i am experiencing very slow load time.
What am i doing wrong? My end result would like to be a
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in your text box, include an onChange attribute (i think it's
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will be made to the server.
Be warned though: This, like all other AJAX calls, can lead
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Working with large tables - thumbnail size

Hi,
I'm working with some oversized tables in IBA. What I usually do is make the table as needed and then use the "Uses thumbnail on page" option in the Layout section of the inspector and adjust the thumbnail size to fit the page as needed. What happened this time, that after the document has been closed and reopened, some tables reset the thumbnail size back to default, which is small. I can't seem to find what's causing this, one table is not behaving like that, although it's been done using the same method. Anyone else ran into the same thing? Any suggestions?
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Why don't you use a stored proc?
Why are you ordering it?
Should I take partial entries in a loop? Yep. Because software isn't perfect. No point in attempting to process the universe when you know it will fail sometime and it is easier to handle smaller failures than large ones (and you won't have to redo everything.)

Using forms with a table retrospectively (ipad)

I have a table in numbers that I am using to track my travel budget. I didn't create the original spreadsheet and there's lots of formulas. There's also a lot of data in there now and it's tricky to use as a spreadsheet so I'd like to implement forms.
My research tells me that the reason I can't start a form at the moment is because the table wasn't set up with headers, & turning headers on now doesn't fix it.
Is there a way to start a NEW table (with headers turned on) and import my current data including formulas/values? So far, I've had no luck trying it myself.
Thanks.

There should be no reason you cannot get the headers to work, as long as you fill in a header for every column Even if it is "Calcs 1".
If you must amke a new table, You can make a new table set up with headers and footers then copy/paste the data from the old table into the new one.
Jason

Using DataSet with large datasets

I have a product, like a shirt, that comes in 800 colors.
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In my Googling I came across this Cold Fusion example:
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In the past I tried to optimize ParagraphView and SectionView of the kit. Don't know whether it will help in your case. Hope so.
import javax.swing.text.*;
import java.awt.Rectangle;
import javax.swing.SizeRequirements;
import java.awt.Shape;
public class OptimizedParagraphView extends ParagraphView {
    public OptimizedParagraphView(Element elem) {
        super(elem);
    protected void layoutMajorAxis(int targetSpan, int axis, int[] offsets, int[] spans) {
        //optimized
        int preferred = 0;
        int n = getViewCount();
        for (int i = 0; i < n; i++) {
            View v = getView(i);
            spans[i] = (int) v.getPreferredSpan(axis);
            offsets=preferred;
preferred += spans[i];
protected void layoutMinorAxis(int targetSpan, int axis, int[] offsets, int[] spans) {
//optimized
int n = getViewCount();
for (int i = 0; i < n; i++) {
View v = getView(i);
int min = (int) v.getMinimumSpan(axis);
offsets[i] = 0;
spans[i] = Math.max(min, targetSpan);
public int getResizeWeight(int axis) {
//optimized
return 0;
public float getAlignment(int axis) {
//opimized
return 0;
protected View createRow() {
//optimized
return new OptimizedRow(getElement());
class OptimizedRow extends BoxView {
SizeRequirements mimorRequirements;
OptimizedRow(Element elem) {
super(elem, View.X_AXIS);
protected void loadChildren(ViewFactory f) {
public AttributeSet getAttributes() {
View p = getParent();
return (p != null) ? p.getAttributes() : getElement().getAttributes();
public float getAlignment(int axis) {
if (axis == View.X_AXIS) {
switch (StyleConstants.getAlignment(getAttributes())) {
case StyleConstants.ALIGN_LEFT:
return 0;
case StyleConstants.ALIGN_RIGHT:
return 1;
case StyleConstants.ALIGN_CENTER:
case StyleConstants.ALIGN_JUSTIFIED:
return 0.5f;
return 0;
public Shape modelToView(int pos, Shape a, Position.Bias b) throws BadLocationException {
Rectangle r = a.getBounds();
View v = getViewAtPosition(pos, r);
if ((v != null) && (!v.getElement().isLeaf())) {
// Don't adjust the height if the view represents a branch.
return super.modelToView(pos, a, b);
r = a.getBounds();
int height = r.height;
int y = r.y;
Shape loc = super.modelToView(pos, a, b);
r = loc.getBounds();
r.height = height;
r.y = y;
return r;
public int getStartOffset() {
int offs = Integer.MAX_VALUE;
int n = getViewCount();
for (int i = 0; i < n; i++) {
View v = getView(i);
offs = Math.min(offs, v.getStartOffset());
return offs;
public int getEndOffset() {
int offs = 0;
int n = getViewCount();
for (int i = 0; i < n; i++) {
View v = getView(i);
offs = Math.max(offs, v.getEndOffset());
return offs;
protected void layoutMinorAxis(int targetSpan, int axis, int[] offsets, int[] spans) {
baselineLayout(targetSpan, axis, offsets, spans);
protected SizeRequirements calculateMinorAxisRequirements(int axis,
SizeRequirements r) {
mimorRequirements= baselineRequirements(axis, r);
return mimorRequirements;
protected SizeRequirements baselineRequirements(int axis, SizeRequirements r) {
if (r == null) {
r = new SizeRequirements();
int n = getViewCount();
// loop through all children calculating the max of all their ascents and
// descents at minimum, preferred, and maximum sizes
int span=0;
for (int i = 0; i < n; i++) {
View v = getView(i);
// find the maximum of the preferred ascents and descents
span = Math.max((int)v.getPreferredSpan(axis),span);
r.preferred = span;
r.maximum=span;
r.minimum=span;
return r;
protected int getViewIndexAtPosition(int pos) {
// This is expensive, but are views are not necessarily layed
// out in model order.
if(pos < getStartOffset() || pos >= getEndOffset())
return -1;
for(int counter = getViewCount() - 1; counter >= 0; counter--) {
View v = getView(counter);
if(pos >= v.getStartOffset() &&
pos < v.getEndOffset()) {
return counter;
return -1;
protected short getLeftInset() {
View parentView;
int adjustment = 0;
if ((parentView = getParent()) != null) { //use firstLineIdent for the first row
if (this == parentView.getView(0)) {
adjustment = firstLineIndent;
return (short)(super.getLeftInset() + adjustment);
protected short getBottomInset() {
float lineSpacing=StyleConstants.getLineSpacing(getAttributes());
return (short)(super.getBottomInset() + mimorRequirements.preferred * lineSpacing);
protected void layoutMajorAxis(int targetSpan, int axis, int[] offsets, int[] spans) {
//optimized
int preferred = 0;
int n = getViewCount();
for (int i = 0; i < n; i++) {
View v = getView(i);
spans[i] = (int) v.getPreferredSpan(axis);
offsets[i]=preferred;
preferred += spans[i];
public int getResizeWeight(int axis) {
//optimized
return 0;
import javax.swing.text.*;
public class OptimizedSectionView extends BoxView {
public OptimizedSectionView(Element elem) {
super(elem,View.Y_AXIS);
protected void layoutMajorAxis(int targetSpan, int axis, int[] offsets, int[] spans) {
//optimized
int preferred = 0;
int n = getViewCount();
for (int i = 0; i < n; i++) {
View v = getView(i);
spans[i] = (int) v.getPreferredSpan(axis);
offsets[i]=preferred;
preferred += spans[i];
public int getResizeWeight(int axis) {
//optimized
return 0;
public float getAlignment(int axis) {
//opimized
return 0;
class MyViewFactory implements ViewFactory {
* Creates view for specified element.
* @param elem Element parent element
* @return View created view instance.
public View create(Element elem) {
String kind = elem.getName();
if (kind != null) {
if (kind.equals(AbstractDocument.ContentElementName)) {
return new LabelView(elem);
else if (kind.equals(AbstractDocument.ParagraphElementName)) {
return new OptimizedParagraphView(elem);
// return new ParagraphView(elem);
else if (kind.equals(AbstractDocument.SectionElementName)) {
return new OptimizedSectionView(elem);
// return new BoxView(elem, View.Y_AXIS);
else if (kind.equals(StyleConstants.ComponentElementName)) {
return new ComponentView(elem);
else if (kind.equals(StyleConstants.IconElementName)) {
return new IconView(elem);
// default to text display
return new LabelView(elem);
regards,
Stas

Using workspaces with large tables

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