Select tables (too many)

Hi all
I'm a proud developer Oracle Apex. We have developed an interactive report that is generated from several tables joined in a remote system. I read that to improve performance, we can do the following:
(1) create a temporary table on our system that stores the id app_user and colmun following the query
(2) create a procedure that does it:
declare
param1: =: PXX_item
param2: =: PXY_item.
param3: =: V ('APP_USER')
Insert into < our_table >
(param3, < query of the remote system > select)
commit;
(3) Rediresct to a query page where IR reads from this temporary table

The "Exit" button, there is a procedure that purge the data from the table of this user (remove temp where user = V ('app_user'), then the temporary table is filled only with the necessary data.

Do you mind? Application will be used about 500 users, 50 concurrent users at a time.

Thank you!

You must enable the APEX on the source system, and install your application here. You can only ship IR in your main application as a framework. This way, you will get the best performance.

Denes Kubicek
-------------------------------------------------------------------
http://deneskubicek.blogspot.com/
http://www.Apress.com/9781430235125
http://Apex.Oracle.com/pls/Apex/f?p=31517:1
http://www.Amazon.de/Oracle-Apex-XE-Praxis/DP/3826655494
-------------------------------------------------------------------

Tags: Database

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Kind regards

Linda

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My Blog: http://www.inside-oracle-apex.com
APEX Plug-Ins: http://apex.oracle.com/plugins
Twitter: http://www.twitter.com/patrickwolf

A function in a subquery is call too many times.

Hi all

I am struggling to understand why a function in a subquery is called too many times.
Let me explain with an example:

create or replace function all_emp (v_deptno in number) 
return varchar2
as

v_all_emp varchar2(2000);

begin

    dbms_output.put_line ('function called');

    for i in (select * from emp where deptno = v_deptno) loop

        v_all_emp := v_all_emp || i.ename || '; ';
    
    end loop;

return v_all_emp;
    
end;
/

-- running just the subquery, calls the function all_emp only 4 times (once for each row in table dept)
select 
    d.deptno,
    d.dname,
    all_emp(d.deptno) f_all_emp
    from dept d;

-- running the whole query, using regexp to split the value of f_all_emp into separate fields, causes that function all_emp is called 28 times, thus 6 times for each row!!
select tmp.*,
regexp_substr(f_all_emp,'[^;]*',1,1) emp1,
regexp_substr(f_all_emp,'[^;]*',1,3) emp2,
regexp_substr(f_all_emp,'[^;]*',1,5) emp3,
regexp_substr(f_all_emp,'[^;]*',1,7) emp4,
regexp_substr(f_all_emp,'[^;]*',1,9) emp5,
regexp_substr(f_all_emp,'[^;]*',1,11) emp6
from
    (select 
    d.deptno,
    d.dname,
    all_emp(d.deptno) f_all_emp
    from dept d) tmp
;

I do not understand why Oracle calls my 28 times function in this example, 4 times should be sufficient.

Is there a way to force that the subquery is materialized first?

A reminder of the facts:
Above function / request is of course a simple example.
In fact, I have a rather complex function, integrating in a subquery.
The subquery is already slow (2 min) to run, but when I want to share the result of the function in several areas (about 20) it's over an hour due to above described behavior.

Optimizer merges online view and the query results in:

select  d.deptno,
        d.dname,
        all_emp(d.deptno) f_all_emp
        regexp_substr(all_emp(d.deptno),'[^;]*',1,1) emp1,
        regexp_substr(all_emp(d.deptno),'[^;]*',1,3) emp2,
        regexp_substr(all_emp(d.deptno),'[^;]*',1,5) emp3,
        regexp_substr(all_emp(d.deptno),'[^;]*',1,7) emp4,
        regexp_substr(all_emp(d.deptno),'[^;]*',1,9) emp5,
        regexp_substr(all_emp(d.deptno),'[^;]*',1,11) emp6
  from  dept d
/

That's why function is called 28 times. Seen go explain plan:

SQL> explain plan for
  2  select tmp.*,
  3          regexp_substr(f_all_emp,'[^;]*',1,1) emp1,
  4          regexp_substr(f_all_emp,'[^;]*',1,3) emp2,
  5          regexp_substr(f_all_emp,'[^;]*',1,5) emp3,
  6          regexp_substr(f_all_emp,'[^;]*',1,7) emp4,
  7          regexp_substr(f_all_emp,'[^;]*',1,9) emp5,
  8          regexp_substr(f_all_emp,'[^;]*',1,11) emp6
  9    from  (
 10           select  d.deptno,
 11                   d.dname,
 12                   all_emp(d.deptno) f_all_emp
 13             from  dept d
 14          ) tmp
 15  /

Explained.

SQL> @?\rdbms\admin\utlxpls

PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------
Plan hash value: 3383998547

--------------------------------------------------------------------------
| Id  | Operation         | Name | Rows  | Bytes | Cost (%CPU)| Time     |
--------------------------------------------------------------------------
|   0 | SELECT STATEMENT  |      |     4 |    52 |     3   (0)| 00:00:01 |
|   1 |  TABLE ACCESS FULL| DEPT |     4 |    52 |     3   (0)| 00:00:01 |
--------------------------------------------------------------------------

8 rows selected.

SQL>

If we use the NO_MERGE indicator:

SQL> select  /*+ NO_MERGE(tmp) */
  2          tmp.*,
  3          regexp_substr(f_all_emp,'[^;]*',1,1) emp1,
  4          regexp_substr(f_all_emp,'[^;]*',1,3) emp2,
  5          regexp_substr(f_all_emp,'[^;]*',1,5) emp3,
  6          regexp_substr(f_all_emp,'[^;]*',1,7) emp4,
  7          regexp_substr(f_all_emp,'[^;]*',1,9) emp5,
  8          regexp_substr(f_all_emp,'[^;]*',1,11) emp6
  9    from  (
 10           select  d.deptno,
 11                   d.dname,
 12                   all_emp(d.deptno) f_all_emp
 13             from  dept d
 14          ) tmp
 15  /

    DEPTNO DNAME          F_ALL_EMP  EMP1       EMP2       EMP3       EMP4       EMP5       EMP6
---------- -------------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
        10 ACCOUNTING     CLARK; KIN CLARK       KING       MILLER
                          G; MILLER;

        20 RESEARCH       SMITH; JON SMITH       JONES      SCOTT      ADAMS      FORD
                          ES; SCOTT;
                           ADAMS; FO
                          RD;

        30 SALES          ALLEN; WAR ALLEN       WARD       MARTIN     BLAKE      TURNER     JAMES
                          D; MARTIN;

    DEPTNO DNAME          F_ALL_EMP  EMP1       EMP2       EMP3       EMP4       EMP5       EMP6
---------- -------------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
                           BLAKE; TU
                          RNER; JAME
                          S;

        40 OPERATIONS

function called
function called
function called
function called
function called
function called
SQL> explain plan for
  2  select  /*+ NO_MERGE(tmp) */
  3          tmp.*,
  4          regexp_substr(f_all_emp,'[^;]*',1,1) emp1,
  5          regexp_substr(f_all_emp,'[^;]*',1,3) emp2,
  6          regexp_substr(f_all_emp,'[^;]*',1,5) emp3,
  7          regexp_substr(f_all_emp,'[^;]*',1,7) emp4,
  8          regexp_substr(f_all_emp,'[^;]*',1,9) emp5,
  9          regexp_substr(f_all_emp,'[^;]*',1,11) emp6
 10    from  (
 11           select  d.deptno,
 12                   d.dname,
 13                   all_emp(d.deptno) f_all_emp
 14             from  dept d
 15          ) tmp
 16  /

Explained.

SQL> @?\rdbms\admin\utlxpls

PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------
Plan hash value: 2317111044

---------------------------------------------------------------------------
| Id  | Operation          | Name | Rows  | Bytes | Cost (%CPU)| Time     |
---------------------------------------------------------------------------
|   0 | SELECT STATEMENT   |      |     4 |  8096 |     3   (0)| 00:00:01 |
|   1 |  VIEW              |      |     4 |  8096 |     3   (0)| 00:00:01 |
|   2 |   TABLE ACCESS FULL| DEPT |     4 |    52 |     3   (0)| 00:00:01 |
---------------------------------------------------------------------------

9 rows selected.

SQL>

Not sure why the function is executed once 6 and not 4. What we really want, is to materialize reviews online:

SQL> with tmp as (
  2               select  /*+ materialize */
  3                       d.deptno,
  4                       d.dname,
  5                       all_emp(d.deptno) f_all_emp
  6                 from  dept d
  7              )
  8  select  tmp.*,
  9          regexp_substr(f_all_emp,'[^;]*',1,1) emp1,
 10          regexp_substr(f_all_emp,'[^;]*',1,3) emp2,
 11          regexp_substr(f_all_emp,'[^;]*',1,5) emp3,
 12          regexp_substr(f_all_emp,'[^;]*',1,7) emp4,
 13          regexp_substr(f_all_emp,'[^;]*',1,9) emp5,
 14          regexp_substr(f_all_emp,'[^;]*',1,11) emp6
 15    from  tmp
 16  /

    DEPTNO DNAME          F_ALL_EMP  EMP1       EMP2       EMP3       EMP4       EMP5       EMP6
---------- -------------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
        10 ACCOUNTING     CLARK; KIN CLARK       KING       MILLER
                          G; MILLER;

        20 RESEARCH       SMITH; JON SMITH       JONES      SCOTT      ADAMS      FORD
                          ES; SCOTT;
                           ADAMS; FO
                          RD;

        30 SALES          ALLEN; WAR ALLEN       WARD       MARTIN     BLAKE      TURNER     JAMES
                          D; MARTIN;

    DEPTNO DNAME          F_ALL_EMP  EMP1       EMP2       EMP3       EMP4       EMP5       EMP6
---------- -------------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
                           BLAKE; TU
                          RNER; JAME
                          S;

        40 OPERATIONS

function called
function called
function called
function called
SQL> explain plan for
  2  with tmp as (
  3               select  /*+ materialize */
  4                       d.deptno,
  5                       d.dname,
  6                       all_emp(d.deptno) f_all_emp
  7                 from  dept d
  8              )
  9  select  tmp.*,
 10          regexp_substr(f_all_emp,'[^;]*',1,1) emp1,
 11          regexp_substr(f_all_emp,'[^;]*',1,3) emp2,
 12          regexp_substr(f_all_emp,'[^;]*',1,5) emp3,
 13          regexp_substr(f_all_emp,'[^;]*',1,7) emp4,
 14          regexp_substr(f_all_emp,'[^;]*',1,9) emp5,
 15          regexp_substr(f_all_emp,'[^;]*',1,11) emp6
 16    from  tmp
 17  /

Explained.

SQL> @?\rdbms\admin\utlxpls

PLAN_TABLE_OUTPUT
-----------------------------------------------------------------------------------------------------------------------
Plan hash value: 634594723

---------------------------------------------------------------------------------------------------------
| Id  | Operation                  | Name                       | Rows  | Bytes | Cost (%CPU)| Time     |
---------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT           |                            |     4 |  8096 |     5   (0)| 00:00:01 |
|   1 |  TEMP TABLE TRANSFORMATION |                            |       |       |            |          |
|   2 |   LOAD AS SELECT           |                            |       |       |            |          |
|   3 |    TABLE ACCESS FULL       | DEPT                       |     4 |    52 |     3   (0)| 00:00:01 |
|   4 |   VIEW                     |                            |     4 |  8096 |     2   (0)| 00:00:01 |
|   5 |    TABLE ACCESS FULL       | SYS_TEMP_0FD9D6603_20255AE |     4 |    52 |     2   (0)| 00:00:01 |

PLAN_TABLE_OUTPUT
-----------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------

12 rows selected.

SQL>

However, suspicion of MATERIALIZATION is a hint of undocumented.

SY.

too many return values for a single node
I have a table with two columns

the table structure
----------------------
string school_name type
xmltype obj_xml

Row1
----------
abc_school,
< student >
< student >
< id > 101 / < ID >
< teacher > CBA < / teacher >
< / student >
< student >
< id > 102 / < ID >
XYZ < teacher > < / teacher >
ONP < teacher > < / teacher >
RSM < teacher > < / teacher >
< / student >
< / students >

row2
-----------
def_school,
< student >
< student >
< id > 301 / < ID >
pqr < teacher > < / teacher >
< / student >
< student >
< id > 302 / < ID >
XYZ < teacher > < / teacher >
< / student >
< / students >

is it possible to display data in the format using a query oracle below.
---------------------------------------------------------------------------------------------------
teacher id school_name
--------------------- ------- ------------
abc_school 101 abc
abc_school 102 xyz
abc_school 102 onp
RSM abc_school 102

I used the slot request, throwing an error - too many return values for a single node

SELECT school_name, teacher
ExtractValue (value (x), ' / / key ') like student_id
extractValue (value (x), ' / / value ') AS teacher
SCHOOL t,.
TABLE)
XMLSequence (extract (obj_xml, ' / students/pupils '))
) x

Please post How can I modify this query, the teacher tags may vary for each student

Published by: user7955917 on May 8, 2012 04:00
As mentioned in your other thread today, it would be helpful if you could post your exact version of db.
Samples of work would be appreciated too, the XML data, you gave are not correct.

I would do it with two XMLTables, like this:
```
SQL> SELECT school_name
  2       , x1.id
  3       , x2.teacher
  4  FROM school t
  5     , XMLTable('/students/student'
  6         passing t.obj_xml
  7         columns id       number   path 'id'
  8               , teachers xmltype  path 'teacher'
  9       ) x1
 10     , XMLTable('/teacher'
 11         passing x1.teachers
 12         columns teacher  varchar2(30) path '.'
 13       ) x2
 14  ;

SCHOOL_NAME                            ID TEACHER
------------------------------ ---------- ------------------------------
abc_school                            101 abc
abc_school                            102 xyz
abc_school                            102 onp
abc_school                            102 rsm
def_school                            301 pqr
def_school                            302 xyz

6 rows selected
 
```

Too many objects correspond to the oracle.jbo.Key [2 primary key]. Error
Hello

I view a read-only table, and an editable form below so that the user can select a line in the table and the rank must be filled in the form below.
The user must be able to update the line and save in the form below.
Then the table above must also be updated with the updated values.

To do this, I created a from VO EO.

Using the same data control, I created a table UI Readonly and an editable form in the same JSF page.

When I run the page, the first line is filled in the table and the form.
When I select the second line of the table, I get the following error in the editable form

Error: too many objects match the [2 primary key] oracle.jbo.Key.

My EO has only one primary key, and I have not included the column ROWID EO or VO.

How can we solve this problem?

However, if I move the form to another page, it works well.
But we have the table and editable form on the same page for ease of use purposes.

Thanks for any help.
Sameer
Hi Sameer,

You can run your VO in many ways as Amit said...
Otherwise you can go to your entityImpl, the super.doDML method of the validation without any errors you can re-providing your VO here itself
And give the save button as partial triggers for Table...

Kind regards
Suganth.G

too many lines found
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My problem is when I am in form gives the Error Message ("too many lines found_orders_begin'");

Here are my codes.

PROCEDURE post_query IS
CURSOR mast_cur IS
SELECT pa.ship_to_last_name,
PA.ship_to_first_name,
PA.ship_to_address1,
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p.packing_id,
OF pa, packing p packing_attributes
WHERE the p.packing_id; = pa.packing_id
AND p.packing_id; =: PACKING_JOINED. PACKING_ID;

BEGIN
Message ("too many lines found_orders_begin'");
OPEN mast_cur.
loop
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: PACKING_JOINED. SHIP_TO_FIRST_NAME,
: PACKING_JOINED. SHIP_TO_ADDRESS1,
: PACKING_JOINED. SHIP_TO_ADDRESS2,
: PACKING_JOINED. SHIP_TO_CITY,
: PACKING_JOINED. PACKING_ID,
end loop;
CLOSE Mast_cur;

EXCEPTION
WHEN too_many_rows THEN
Message ("too many lines found '");
WHEN no_data_found THEN
Message ("no data has been found it is '");
WHILE OTHERS THEN
Message ("do something else'");

END post_query;
***********************************************************************************
Detail of proc

PROCEDURE post_query IS
CURSOR det_cur IS
SELECT pd.quantity,
PD.stock_number,
OF packing_details pd, packing p
WHERE the p.packing_id; = pd.packing_id
AND pd.packing_id =: PACKING_JOINED. PACKING_ID;
BEGIN
Message ("too many lines found_pack_begin'");
OPEN det_cur.
Look FOR det_cur IN
: DETAILS. QUANTITY,
: DETAILS. STOCK_NUMBER,
CLOSE Det_cur;

EXCEPTION
WHEN too_many_rows THEN
Message ("too many lines found '");
WHEN no_data_found THEN
Message ("no data has been found it is '");
WHILE OTHERS THEN
Message ("do something else'");

END post_query;

Thanks in advance for your help.

Sandy
If it is an element of data, why you change the database value in POST-QUERY-trigger with your select? At that time you assign a new value to a database element. It's like changed recording (if editing is allowed, otherwise it will trigger an error)

Receive "Safari cannot open the page. Too many redirects occurred trying to open google

On a Mac OS X 10.7, when I try and access google/mail I get the message: "Safari cannot open the page. Too many redirects occurred during open yo... Any ideas?

In your Safari menu bar, click Safari > Preferences then select the Privacy tab, then click: delete all data Web site

Then exit then restart Safari to test.

If you see the same message, the redirects may be due to malicious software.

You can download here free malware removal utility > https://www.malwarebytes.org/

Or, if you would rather download MalwareBytes, you follow the instructions in the malware removal manually here > remove the unwanted advertising software that shows ads advertising and graphics on your Mac

Windows Movie Maker error importation 'may not be imported. "An interface has too many methods to fire from.

I'm doing a movie using Windows Movie Maker and hobby clips that I converted to VHS using Roxio Easy VHS tapes to DVD converter. When I try to import the file into the Movie Maker, I get a message saying 'could not be imported. "An interface has too many methods to fire from. What should I do?

This happens usually when your source files are
not compatible with Movie Maker. Best bet would be
be to convert video files to WMV format
before you import into Movie Maker.

There are many converters available on the net... some
free... some detail.

The following freeware converter is just one example:

(FWIW... it's always a good idea to create a system)
Restore point before installing software or updates)

Format Factory (freeware)
http://www.videohelp.com/tools/Format_Factory
(the 'direct link' is faster download)
(the file you want to download is: > FFSetup290.zip<>
(FWIW... installation..., you can uncheck
('all' boxes on the final screens)
(Windows XP / Vista / 7)

First, you will need to decompress the file or just open the
Drag > FFSetup290.exe< out="" of="" the="">
and drop it on your desktop. To install left click.

Next, after the download and installation of Format
Factory... you can open the program and
left click on the toolbar, the "Option" button and
"Select an output folder to" / apply / OK.
(this is where you find your files after they)
are converted)

Drag and drop your video clips on the main screen...

Select "all to WMV" / OK...

Click on... Beginning... in the toolbar...

That should do it...

Good luck...

too many startup programs

Too many programs that start automatically when I log in I have to change this

To identify what loads when you start using Autoruns (freeware from Microsoft).
http://www.Microsoft.com/technet/sysinternals/ProcessesAndThreads/Autoruns.mspx

With Autoruns, you can deselect an item which disables startup, or you can click with the right button on an item, then remove it. If you clear the check box that you can check back for re - activate the element. It is an approach much safer than editing the registry and better than using msconfig.

Another useful feature of the program is that you can click with the right button on an item and select search online to get information about the selected item.

I'm trying to import video in Movie Maker and get the following message: M2U00017. MPG could not be imported. An interface has too many methods to fire events from. What do this mean and what should I do to allow me to import video files to edit?

When you try to import video files in Movie Maker I get the message; M2U00017. MPG could not be imported. An interface has too many methods to fire events from

-What this means and how do I fix it so I can import video files to edit?

When you try to import video files in Movie Maker I get the message; M2U00017. MPG could not be imported. An interface has too many methods to fire events from

-What this means and how do I fix it so I can import video files to edit?

=======================================
Movie Maker has problems with the .mpg files... best bet would be
to convert the .mpg files before importing the .wmv format.

Several formats are apparently compatible with
Movie Maker, but the most reliable choices are:

Photos - bmp
Video - wmv or dv - avi
Music - wma, wav, .wmv

See the following article:

Movie Maker 2 - Import MPEG files
http://www.Papajohn.org/mm2-importing-video-MPEG2.html

The following freeware can convert:

(FWIW... it's always a good idea to create a system)
Restore point before installing software or updates)

Format Factory
http://www.pcfreetime.com/
(FWIW... you can uncheck
all the boxes on the last screen)

After downloading and installing Format Factory...
Open the program and choose an output folder...
(this is where you will find your files when they are
converted)

Drag and drop your video clips on the main screen...

Select "At?" / OK...
(the? is the format of your choice)

Click on... Beginning... in the toolbar...

That should do it...

Good luck...

John Inzer - MS - MVP - digital media experience

Error message "too many redirects."

I am running Windows 7, using the Chrome browser and have My Yahoo set as my homepage on my desk. I can't access my Yahoo I get the error page "Web page a redirect loop" with message void "too many redirects." I followed the instructions and deleted cookies, third-party cookies accepted and tried different browsers. I can't access my Yahoo on other devices.

Hello Janet,.

Thanks for posting your query in Microsoft Community.

Let me ask you;
- The issue is specific to Google Chrome browser?
- Are you facing any issues with Internet Explorer?
If the problem is specific to Google Chrome, I recommend posting your query in the support forum of Google Chrome for the best possible response to your query.

If you are having problems with Internet Explorer as well, please come back with answers to the following questions;
- What is the version of Internet Explorer do you use?
- What security software is installed on the computer?
- When was the last time it was working fine?
- Remember to no particular change in the computer before the show?
If you are faced with questions as well using Internet Explorer, you can try the following methods and let us know the result.

Method 1: I recommend that you clear your browser cache and temporary internet files to ensure that they are not causing your problem. Please delete your browser cookies by following the instructions.
1. Open Internet Explorer, click the Start button. In the search box, and then type Internet Explorerin the list of results, click on Internet Explorer.
1. Select Tools (via the gear icon) > Security > delete history....
1. Be sure to uncheck the favorite preserve Web site data and check the Temporary Internet files and Cookies , and then click Remove.
2. Once it has cleared your cache and cookies successfully, you will receive a confirmation at the bottom of the window.
If the problem persists, try Method 2.

Method 2: I suggest that you follow the steps in the article given below and check.

Can't access some Web sites in Internet Explorer

Note: The steps described in the article for Internet Explorer 10 for Windows 7 also applies to IE 11 for Windows 7.

Important: Reset the Internet Explorer settings can reset security settings or privacy settings that you have added to the list of Trusted Sites. Reset the Internet Explorer settings can also reset parental control settings. We recommend that you note these sites before you use the reset Internet Explorer settings.

Hope the helps of information. Let us know if you need help with Windows related issues. We will be happy to help you.

Hope this information is useful. Please feel free to answer in the case where you are facing in the future other problems with Windows.

Select tables (too many)

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