Object View Query.

Hi!
Is there any performance related benifit may we get if we use Object View? Or we use it just to make a relational object to look like object and take other benifits from it? Thanks in advance.
Regards.
Satyaki De.

use setQuery("your_where_clause"). This allows you to modify the whole where clause. If you have to modify the selected attribute too you can use createViewObjectFromQueryStmt(...) from within your application module.

Similar Messages

Is there a way to force a View Object to query the database always?

Dear All,
Is there a way to force a view object to always scan the database table to read the latest data?
Here's my use case.
I have a page that loads data then I have a button which executes the following code.
viewObject.setApplyViewCriteriaName("SampleCriteria");
viewObject.setNamedWhereClauseParam("arg1", "test");
viewObject.executeQuery();
RowSetIterator it = viewObject.createRowSetIterator(null);
while(it.hasNext()) {
/* More Code */
}Suppose after page load, I edited some row in the table and then I clicked the button. I notice that my edited row
was not reflected in the query.
I am not sure but is there some configuration to check so that when the viewobject executes it will always query the data
from the table?
I am thinking that there is some level of caching and I want to disable it. If I restart my application, I notice that it is able to read the latest data.
JDEV 11.1.1.5

By default a view object performs its query against the database to retrieve the rows in its resulting row set. However, you can also use view objects to perform in-memory searches and sorting to avoid unnecessary trips to the database.
The view object's query mode controls the source used to retrieve rows to populate its row set. For more details please refer: http://docs.oracle.com/cd/B31017_01/web.1013/b25947/bcadvvo005.htm
Also, see if this helps: setQueryMode for secondary rowSet not working

View query to results array

previus information... jdeveloper 10.1.3.0.4, the application is java swing adf bc .
hi, i have a bc view (sql only) inside an application module, how could i assign the results of view's query with an array of objects.

Not sure if this is on target, but if you are using ADF BC the view object's query results are already in an array of objects. Reference the following document to view how the results are structured. You can programmatically then work with the results set using the ViewObject, RowSet, and RowSetIterator Interfaces. See the SRDemo Application Module services for some examples of this in action (demo is in JSF though, not Swing.)
http://www.oracle.com/technology/products/jdev/tips/muench/mostcommon/index.html
thanks

Creating Object views using XSU PL/SQL.Please SEE.

Hi,
I am presently using XSU PL/SQL utility with Oracle 9i and using the
DBMS_XMLQuery.newContext(<My Select clause goes here>,and the
DBMS_XMLQuery.getXML()which generates an XML document.
My query is:
I have 2 tables (One master and the other detail table.).
Table : DI_Master
di_num
00001
Table: DI_Details
di_num di_act
00001 ABCD
00001 ANCF
00001 IOPP
Now the XML I'd like is :
<di_num>00001</di_num>
<di_act>
<val>ABCD</val>
<val>ANCF</val>
<val>IOPP</val>
</di_act>
Do I need to create object tables for this,insert data into object tables
and then read this table? It will become an extremely tedious process
I guess an OBJECT view can do what I want.Can anyone please tell me how
to write an object view for the 2 tables please and the get the output as
desired.?

Supposing you have further
nesting of the tables.Then how will you go about doing that.You can have multiple levels of CURSOR expressions (see an example below, not a real-life example, but illustrates the point).
SQL> set long 4000
SQL> select dbms_xmlquery.getXML('select deptno,' ||
2 'cursor(select empno, cursor(select losal, hisal from salgrade) salgrades '||
3   'from emp e where e.deptno = d.deptno and rownum < 3) EMPLOYEES ' ||
4 'from dept d where d.deptno = 10')
5 FROM DUAL;
DBMS_XMLQUERY.GETXML('SELECTDEPTNO,'||'CURSOR(SELECTEMPNO,CURSOR(SELECTLOSAL,HIS
<?xml version = '1.0'?>
<ROWSET>
   <ROW num="1">
      <DEPTNO>10</DEPTNO>
      <EMPLOYEES>
         <EMPLOYEES_ROW num="1">
            <EMPNO>7782</EMPNO>
            <SALGRADES>
               <SALGRADES_ROW num="1">
                  <LOSAL>700</LOSAL>
                  <HISAL>1200</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="2">
                  <LOSAL>1201</LOSAL>
                  <HISAL>1400</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="3">
                  <LOSAL>1401</LOSAL>
                  <HISAL>2000</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="4">
                  <LOSAL>2001</LOSAL>
                  <HISAL>3000</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="5">
                  <LOSAL>3001</LOSAL>
                  <HISAL>9999</HISAL>
               </SALGRADES_ROW>
            </SALGRADES>
         </EMPLOYEES_ROW>
         <EMPLOYEES_ROW num="2">
            <EMPNO>7839</EMPNO>
            <SALGRADES>
               <SALGRADES_ROW num="1">
                  <LOSAL>700</LOSAL>
                  <HISAL>1200</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="2">
                  <LOSAL>1201</LOSAL>
                  <HISAL>1400</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="3">
                  <LOSAL>1401</LOSAL>
                  <HISAL>2000</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="4">
                  <LOSAL>2001</LOSAL>
                  <HISAL>3000</HISAL>
               </SALGRADES_ROW>
               <SALGRADES_ROW num="5">
                  <LOSAL>3001</LOSAL>
                  <HISAL>9999</HISAL>
               </SALGRADES_ROW>
            </SALGRADES>
         </EMPLOYEES_ROW>
      </EMPLOYEES>
   </ROW>
</ROWSET>
1 row selected.
SQL>
Also,isnt it a better option to create a VIEW of the
Select clause and pass a view to the select clause? At the end of the day, you could use whatever you feel comfortable with, provided that it produces your expected output and looks clean. We are just giving you the ideas, how you implement it actually in your situation, depends upon a lot of factors, that only you know about.

Generating mixed case columns for XML using Object views

I am trying to model a query involving joins to generate hierarchical levels for XML document. I model it with an object view with a multicast subquery and the generated XML works fine except the following :
The generated XML creates a tag <view_column_name>_ITEM for the nested multicase subquery columns in the view and all the nested subquery view columns in upper case because the underlying table columns are in upper case. To better illustrate, please see the following example :
CREATE TYPE Tillinstance_t as object (
"Tillinstanceid" number
,"Stationid" number
,"Comment" varchar2(2000)
,"DepositID" number(38)
,"TimestampCreate" date
,"UseridCreate" number
,"TimestampChange" date
,"UseridChange" number
,"TimestampClosed" date
,"UseridClosed" number
,"TimestampBalance" date
,"UserIDBalance" number )
create type insts as table of Tillinstance_t ;
CREATE OR REPLACE VIEW till_view AS
SELECT t.tillid as "TillID"
, t.description as "Descr"
, t.word as "Word"
, t.Scopetypeid as "ScopeTypeId"
, t.displayOrder as "DisplayOrder"
, t.useridcreate as "UserIDCreate"
, t.newid as "NewID"
, t.flagactive as "FlagActive"
, t.timestampcreate as "TSCR"
, t.useridcreate as "UIDCR"
, t.timestampchange as "TSCH"
, t.useridchange as "UIDCH"
, CAST( MULTISET ( SELECT i.Tillinstanceid as "TillinstanceID"
, i.stationid as "StationID"
, i.ocomment as "Comment"
, i.depositid as "DepositID"
, i.Timestampcreate as "TSCR"
, i.useridcreate as "UIDCR"
, i.Timestampchange as "TSCH"
, i.useridchange as "UIDCH"
, i.timestampclosed as "TSCL"
, i.useridclosed as "UIDCL"
, i.timestampbalance as "TSBAL"
, i.useridbalance as "UIDBAL"
FROM TillInstance i
WHERE t.tillid = i.tillid)
AS Insts)
AS "Insts"
FROM ucTill t
The generated XML shows up in the form of :
<?xml version = '1.0'?>
<Tills>
<Till TillID="1002" Descr="Till #3" Word="Till3" ScopeTypeId="8"
DisplayOrder="0" UserIDCreate="296" TSCR="3/26/2001 0:0:0" UIDCR="296"
TSCH="5/4/2001 14:12:32" UIDCH="298">
<Insts>
<Insts_ITEM TILLINSTANCEID="1278" STATIONID="1057" OCOMMENT="Morning Till3"
TIMESTAMPCREATE="3/26/2001 0:0:0" USERIDCREATE="296" TIMESTAMPCHANGE="6/7/2001
8:26:49" USERIDCHANGE="99" TIMESTAMPCLOSED="6/7/2001 8:26:49"
USERIDCLOSED="99"/>
<Insts_ITEM TILLINSTANCEID="1362" STATIONID="1057" TIMESTAMPCREATE="6/7/2001
8:27:13" USERIDCREATE="99" TIMESTAMPCHANGE="6/11/2001 11:32:58"
USERIDCHANGE="320"/>
</Insts>
</Till>
</Tills>
Now How do I stripe out the _ITEM from the generated XML and change the columns TIMESTAMPCREATE, USERIDCLOSED etc to mixed case?
Any idea

I could generate the mixed case columns with no problem. It was my mistake and sorry for the inconvinience.
However I am running into problems modelling a nested hierarchical set of queries with levels more than 2.
Please advise of any sample code available anywhere.
For example I could do :
create table x1 ( id number , f1 varchar2(10));
creat table x2 ( id number , id_x1 number references x1(id) , f1 varchar2(10)) ;
create table x3 ( id number , id_x2 number references x2(id), f1 varchar2(10)) ;
To model this, I did
create type x3_typ as object ( id number, id_x2 number , f1 varchar2(10)) ;
create type x3_typ_t is table of x3_typ ;
create type x2_typ as object ( id number, id_x1 number , f1 varchar2(10), x3_list x3_typ_t ) ;
create type x2_typ_t is table of ref x2_typ ;
create type x1_typ as object ( id number
, f1 varchar2(10) , x2_list x2_typ_t ) ;
create or replace view x3_x2 as
select id , f1 , cast(multiset(select * from x3 ) as x3_typ_t ) as x3_list
If I try to use a view again like as given below, I get the Oracle inconsistent datatypes error.
create or replace view x2_x1 as
select id , f1 , cast(multiset(select * from x3_x2 ) as x2_typ_t ) as x2_list
I there a better way? Am I missing something? Please help.

2.1 RC1 - Can not get data in Object viewer

Hi,
I open the table and change the tab to "Data" then error message is shown in the Data Editor Log panel.
The message is "ORA-00923: FROM keyword not found where expected".
This table has more than 100 columns. I guess that the SQL statement is too long so whole statement is not send to Oracle.
EA2 work successfully.

Hi,
RaghvendraSaboo
SELECT command is working in worksheet both 'select * from table' and 'select col1, co2,... from table'.
Only object viewer can not show values.
Here is the result of DESC command below.
Thanks.
desc ching1;
Name Null Type
CH-1 NOT NULL CHAR(6)
CH-2 NVARCHAR2(16)
CH-3 CHAR(1)
CH-4Z CHAR(1)
CH-4B CHAR(1)
CH-4K CHAR(1)
CH-5 CHAR(1)
CH-6Z CHAR(1)
CH-6B CHAR(1)
CH-6K CHAR(1)
CH-7 NUMBER(1)
CH-8 NUMBER(1)
CH-9 CHAR(1)
CH-11 NUMBER(1)
CH-12 NUMBER(7)
CH-13 NUMBER(7)
CH-14 CHAR(1)
CH-15 CHAR(1)
CH-16 NUMBER(2)
CH-17 CHAR(1)
CH-18 CHAR(1)
CH-19 NUMBER(7)
CH-20 NUMBER(7)
CH-21 CHAR(1)
CH-22 CHAR(1)
CH-23 NUMBER(2)
CH-24 CHAR(1)
CH-25 CHAR(1)
CH-26 CHAR(1)
CH-27 CHAR(1)
CH-28 CHAR(1)
CH-30 CHAR(1)
CH-31 CHAR(1)
CH-32 CHAR(1)
CH-33 CHAR(1)
CH-34 NUMBER(3)
CH-ER CHAR(1)
CH-48 NUMBER(6)
CH-49 CHAR(1)
CH-50 NUMBER(6)
CH-51 NUMBER(6)
CH-60 NUMBER(1)
CH-61 NUMBER(1)
CH-62 NUMBER(1)
CH-63 NUMBER(1)
CH-64 NUMBER(1)
CH-65 NUMBER(1)
CH-66 NUMBER(1)
CH-67 NUMBER(1)
CH-68 NUMBER(1)
CH-69 NUMBER(1)
CH-73 NUMBER(1)
CH-74 NUMBER(1)
CH-75 NUMBER(1)
CH-76 NUMBER(1)
CH-79 NUMBER(3,2)
CH-80 NUMBER(4)
CH-81 NUMBER(4)
CH-82 NUMBER(5)
CH-83 NUMBER(5)
CH-84 NUMBER(1)
CH-85 NUMBER(5)
CH-86 NUMBER(5)
CH-87 NUMBER(5)
CH-88 NUMBER(2)
CH-91 NUMBER(1)
CH-92 CHAR(1)
CH-93 CHAR(1)
CH-94 NUMBER(1)
CH-95 NUMBER(1)
CH-96 CHAR(1)
CH-97 CHAR(1)
CH-98 NUMBER(1)
CH-99 NUMBER(6)
CH-100 NUMBER(3,2)
CH-101 NUMBER(7)
CH-102 NUMBER(6)
CH-103 NUMBER(6)
CH-104 NUMBER(6)
CH-105 NUMBER(6)
CH-106 NUMBER(5)
CH-107 NUMBER(6)
CH-108 NUMBER(6)
CH-109 NUMBER(6)
CH-110 NUMBER(7)
CH-111 NUMBER(7)
CH-112 NUMBER(6)
CH-113 NUMBER(6)
CH-114 NUMBER(5)
CH-120 NUMBER(6)
CH-121 NUMBER(6)
CH-130 NUMBER(5)
CH-131 NUMBER(6)
CH-132 NUMBER(6)
CH-133 NUMBER(6)
CH-134 NUMBER(6)
CH-135 NUMBER(6)
CH-136 NUMBER(6)
CH-137 NUMBER(6)
CH-138 NUMBER(6)
CH-139 NUMBER(6)
CH-140 NUMBER(6)
CH-141 NUMBER(6)
CH-142 NUMBER(6)
CH-143 NUMBER(6)
CH-144 NUMBER(5)
CH-145 NUMBER(5)
CH-146 NUMBER(5)
CH-147 NUMBER(6)
CH-148 NUMBER(5)
CH-149 NUMBER(5)
CH-150 NUMBER(6)
CH-151 NUMBER(6)
CH-152 NUMBER(6)
CH-153 NUMBER(6)
CH-154 NUMBER(6)
CH-155 NUMBER(6)
CH-156 NUMBER(6)
CH-157 NUMBER(6)
CH-160 NUMBER(7)
CH-170 NUMBER(6)
CH-171 NUMBER(5)
CH-180 NUMBER(6)
CH-190 NUMBER(7)
CH-191 NUMBER(7)
CH-200 NUMBER(3)
CH-201 NUMBER(6)
CH-202 NUMBER(6)
CH-203 NUMBER(6)
CH-204 NUMBER(6)
CH-205 NUMBER(6)
CH-206 NUMBER(6)
CH-207 NUMBER(6)
CH-208 NUMBER(6)
CH-209 NUMBER(6)
CH-210 NUMBER(6)
CH-211 NUMBER(6)
CH-212 NUMBER(6)
CH-213 NUMBER(6)
CH-214 NUMBER(6)
CH-215 NUMBER(6)
CH-216 NUMBER(6)
CH-220 NUMBER(6)
CH-221 NUMBER(6)
CH-222 NUMBER(6)
CH-223 NUMBER(6)
CH-224 NUMBER(6)
CH-225 NUMBER(6)
CH-230 NUMBER(2)
CH-231 NUMBER(5)
CH-240 NUMBER(6)
CH-241 NUMBER(6)
CH-242 NUMBER(6)
CH-243 NUMBER(6)
CH-244 NUMBER(6)
CH-280 NUMBER(6)
CH-290 NUMBER(7)
CH-300 NUMBER(6)
CH-301 NUMBER(6)
CH-302 NUMBER(6)
CH-303 NUMBER(6)
CH-304 NUMBER(1)
CH-305 NUMBER(5)
CH-306 NUMBER(1)
CH-307 NUMBER(6)
CH-308 NUMBER(6)
CH-309 NUMBER(3)
CH-310 NUMBER(6)
CH-311 NUMBER(6)
CH-312 NUMBER(6)
CH-313 NUMBER(6)
CH-314 NUMBER(6)
CH-315 NUMBER(1)
CH-316 NUMBER(5)
CH-317 NUMBER(5)
CH-318 NUMBER(5)
CH-319 NUMBER(1)
CH-320 NUMBER(5)
CH-321 NUMBER(5)
CH-322 NUMBER(5)
CH-323 NUMBER(5)
CH-324 NUMBER(6)
CH-325 NUMBER(6)
CH-326 NUMBER(6)
CH-327 NUMBER(6)
CH-328 NUMBER(6)
CH-329 NUMBER(5)
CH-330 NUMBER(5)
CH-331 NUMBER(5)
CH-332 NUMBER(6)
CH-333 NUMBER(6)
CH-334 NUMBER(5)
CH-335 NUMBER(6)
CH-336 NUMBER(6)
CH-337 NUMBER(5)
CH-338 NUMBER(5)
CH-339 NUMBER(3)
CH-340 NUMBER(6)
CH-341 NUMBER(6)
CH-342 NUMBER(6)
CH-343 NUMBER(6)
CH-344 NUMBER(6)
CH-345 NUMBER(6)
CH-346 NUMBER(6)
CH-347 NUMBER(6)
CH-348 NUMBER(6)
CH-349 NUMBER(6)
CH-350 NUMBER(6)
CH-351 NUMBER(6)
CH-352 NUMBER(6)
CH-353 NUMBER(6)
CH-354 NUMBER(6)
CH-355 NUMBER(5)
CH-356 NUMBER(5)
CH-357 NUMBER(6)
CH-358 NUMBER(6)
CH-359 NUMBER(6)
CH-360 NUMBER(6)
CH-361 NUMBER(6)
CH-362 NUMBER(6)
CH-363 NUMBER(5)
CH-364 NUMBER(5)
CH-365 NUMBER(5)
CH-366 NUMBER(5)
CH-367 NUMBER(5)
CH-368 NUMBER(5)
CH-369 NUMBER(7)
CH-370 NUMBER(7)
CH-371 NUMBER(7)
CH-372 NUMBER(7)
CH-373 NUMBER(6)
CH-374 NUMBER(6)
CH-375 NUMBER(6)
CH-380 NUMBER(6)
CH-381 NUMBER(6)
CH-382 NUMBER(6)
CH-383 NUMBER(6)
CH-384 NUMBER(6)
CH-385 NUMBER(6)
CH-386 NUMBER(6)
CH-387 NUMBER(6)
CH-388 NUMBER(6)
CH-389 NUMBER(6)
CH-390 NUMBER(5)
CH-391 NUMBER(5)
CH-392 NUMBER(5)
CH-393 NUMBER(5)
CH-394 NUMBER(6)
CH-400 NUMBER(5)
CH-401 NUMBER(4)
CH-402 NUMBER(5)
CH-403 NUMBER(5)
CH-404 NUMBER(5)
CH-405 NUMBER(5)
CH-406 NUMBER(6)
CH-407 NUMBER(6)
CH-408 NUMBER(6)
CH-409 NUMBER(6)
CH-410 NUMBER(6)
CH-411 NUMBER(6)
CH-412 NUMBER(6)
CH-413 NUMBER(6)
CH-414 NUMBER(5)
CH-415 NUMBER(6)
CH-416 NUMBER(6)
CH-417 NUMBER(6)
CH-418 NUMBER(6)
CH-419 NUMBER(6)
CH-420 NUMBER(5)
CH-421 NUMBER(5)
CH-422 NUMBER(5)
CH-423 NUMBER(5)
CH-424 NUMBER(5)
CH-425 NUMBER(5)
CH-426 NUMBER(5)
CH-427 NUMBER(6)
CH-480 NUMBER(6)
CH-490 NUMBER(6)
CH-491 NUMBER(6)
CH-500 NUMBER(6)
CH-501 NUMBER(6)
CH-502 NUMBER(6)
CH-503 NUMBER(6)
CH-504 NUMBER(6)
CH-505 NUMBER(6)
CH-506 NUMBER(6)
CH-507 NUMBER(6)
CH-508 NUMBER(6)
CH-509 NUMBER(7)
CH-510 NUMBER(7)
CH-511 NUMBER(7)
CH-512 NUMBER(7)
CH-513 NUMBER(1)
CH-514 NUMBER(1)
CH-515 NUMBER(7)
CH-516 NUMBER(7)
CH-517 NUMBER(7)
CH-518 NUMBER(7)
CH-519 NUMBER(3)
CH-520 NUMBER(7)
CH-530 NUMBER(7)
CH-531 NUMBER(7)
CH-580 NUMBER(7)
CH-590 NUMBER(6)
CH-591 NUMBER(6)
CH-600 NUMBER(4,1)
CH-601 NUMBER(4,1)
CH-602 NUMBER(4,1)
CH-603 NUMBER(4,1)
CH-604 NUMBER(4,1)
CH-605 NUMBER(6,3)
CH-606 NUMBER(4,1)
CH-607 NUMBER(4,1)
CH-608 NUMBER(2)
CH-609 NUMBER(2)
CH-610 NUMBER(2)
CH-611 NUMBER(2)
CH-612 NUMBER(2)
CH-613 NUMBER(2)
CH-614 NUMBER(2)
CH-615 NUMBER(2)
CH-616 NUMBER(2)
CH-617 NUMBER(2)
CH-618 NUMBER(2)
CH-619 NUMBER(2)
CH-620 NUMBER(2)
CH-621 NUMBER(2)
CH-622 NUMBER(2)
CH-623 NUMBER(2)
CH-624 NUMBER(2)
CH-625 NUMBER(2)
CH-626 NUMBER(2)
CH-627 NUMBER(2)
CH-628 NUMBER(3,1)
CH-629 NUMBER(2)
CH-630 NUMBER(2)
CH-631 NUMBER(1)
CH-632 NUMBER(1)
CH-633 NUMBER(2)
CH-634 NUMBER(4,1)
CH-635 NUMBER(2)
CH-636 NUMBER(4,1)
CH-637 NUMBER(1)
CH-638 NUMBER(2)
CH-639 NUMBER(2)
CH-640 NUMBER(4)
CH-641 NUMBER(2)
CH-642 NUMBER(2)
CH-643 NUMBER(2)
CH-644 NUMBER(2)
CH-645 NUMBER(1)
CH-646 NUMBER(2)
CH-647 NUMBER(4,1)
CH-648 NUMBER(1)
CH-649 NUMBER(1)
CH-650 NUMBER(2)
CH-651 NUMBER(2)
CH-660 NUMBER(4,1)
CH-661 NUMBER(6,3)
CH-662 NUMBER(4,1)
CH-663 NUMBER(4,1)
CH-664 NUMBER(4,1)
CH-665 NUMBER(3,1)
CH-666 NUMBER(2)
CH-669 NUMBER(4,1)
CH-670 NUMBER(6)
CH-671 NUMBER(2)
CH-672 NUMBER(2)
CH-673 NUMBER(2)
CH-674 NUMBER(2)
CH-680 NUMBER(1)
CH-681 NUMBER(4,1)
CH-682 NUMBER(1)
CH-683 NUMBER(4,1)
CH-684 NUMBER(1)
CH-685 NUMBER(4,1)
CH-686 NUMBER(1)
CH-687 NUMBER(4,1)
CH-688 NUMBER(1)
CH-689 NUMBER(4,1)
CH-690 NUMBER(1)
CH-691 NUMBER(4,1)
CH-700 NUMBER(6)
CH-701 CHAR(3)
CH-702 CHAR(2)
CH-703 NUMBER(7)
CH-704 NUMBER(8)
CH-705 NUMBER(8)
CH-710 NUMBER(1)
CH-711 NUMBER(4)
CH-712 NUMBER(4)
CH-720 NUMBER(5,2)
CH-721 NUMBER(2)
CH-750 NUMBER(8)
CH-751 NUMBER(7)
CH-752 NUMBER(7)
CH-800 NUMBER(4)
CH-801 NUMBER(4)
CH-802 NUMBER(4)
CH-803 NUMBER(6)
CH-804 NUMBER(6)
CH-811 NUMBER(4)
CH-812 NUMBER(4)
CH-813 NUMBER(6)
CH-814 NUMBER(6)

VIEW Query Problem

Hi Greg,
I had created a view on a table which doesn't have Primary Key, but it has Unique and Not Null constraints on required columns.
I had wrote a procedure to query the data on VIEW. I have experienced strange problem, very first call to procedure will take more time than succeeding requests. For example from second request onwards, it returns data in < 2 Sec, but first transaction is taking 12 Sec to 30 Sec.
I thought that very first time VIEW is taking time to refresh it self. So, I added FORCE keyword in CREATE VIEW stattement. However, that doesn't helped out.
In my further investigation I came to know that base table on which VIEW created, has to be loaded in to memory before querying on VIEW.
So, I had executed a simple select statement on base table, before I execute VIEW query in procedure.
With this change I got results consistently < 2 Sec all the times.
My question is instead of executing the select statement on base table is there a way to load base tables data in memory before querying on VIEW?
Thanks,
Subbarao

Hi,
A view is nothing but parsed SQL statements stored in the database, a view may or may not run faster. If you execute the SQL used to define the view how much time is it taking. If you want try looking at MATERIALIZED VIEW , that may help you.
thanks

Reg: fetch the data by using item_id which is retuned by In line View Query

Hi all,
create table xxc_transactions(type_id number,trx_line_id number ,item_id number,org_id number);
insert into xxc_transactions values(null,null,null,null);
create table xxc_items1(item_id number,org_id number,item_no varchar2(10));
insert into xxc_items1 values(123,12,'book');
create table xxc_headers(header_id number,order_id number);
insert into xxc_headers values(null,null);
create table xxc_lines(header_id number,item_id number,line_id number);
insert into xxc_lines values(null,null,null);
create table xxc_types_tl(transaction_id number,NAME varchar2(10));
insert into xxc_types_tl values(106,'abc');
create table xxc_quantity(item_id number);
insert into xxc_quantity values (123);
create table xxc_quantity_1(item_id number);
insert into xxc_quantity_1 values (123);
SELECT union_id.item_id,
       b.org_id,
       e.name,
       fun1(union_id.item_id) item_no
FROM   xxc_transactions a,
       xxc_items1 b,
       xxc_headers c,
       xxc_lines d,
       xxc_types_tl e,
       (SELECT item_id
        FROM   xxc_quantity
        WHERE item_id = 123
        UNION
        SELECT item_id
        FROM   xxc_quantity_1
        WHERE item_id = 123
        UNION
        SELECT item_id
        FROM   xxc_transactions
        WHERE item_id = 123) union_id
WHERE a.type_id = 6
       AND a.item_id = b.item_id
       AND union_id.item_id = b.item_id
       AND a.org_id = b.org_id
       AND c.header_id = d.header_id
       AND d.line_id = a.trx_line_id
       AND d.item_id = b.item_id
       AND c.order_id = e.transaction_id
       AND b.org_id = 12
GROUP BY union_id.item_id,
          b.org_id,
          e.name
ORDER BY union_id.item_id;
create or replace function fun1(v_item in number)
return varchar2
is
v_item_no
Begin
   select item_no from xxc_items1
   where item_id=v_item;
   return v_item_no ;
    Exception
     When Others Then
      v_item_no := null;
      return v_item_no;
END fun1;
I need fetch the data by using item_id which is retuned by In line View Query(UNION)
item_id org_id name item_no
123        12        abc       book
Version: 11.1.0.7.0 and 11.2.0.1.0
Message was edited by: Rajesh123 Added test cases script
Message was edited by: Rajesh123 changed Question as fetch the data by using item_id which is retuned by In line View Query(UNION)

Hi Master , sorry for the late reply and can you please help on this?
create table xxc_transactions(type_id number,trx_line_id number ,item_id number,org_id number);
insert into xxc_transactions values(null,null,null,null);
create table xxc_items(item_id number,org_id number,item_no varchar2(10));
insert into xxc_items values(123,12,'book');
create table xxc_headers(header_id number,order_id number);
insert into xxc_headers values(null,null);
create table xxc_lines(header_id number,item_id number,line_id number);
insert into xxc_lines values(null,null,null);
create table xxc_types_tl(transaction_id number,NAME varchar2(10));
insert into xxc_types_tl values(106,'abc');
create table xxc_uinon_table(item_id number);
insert into xxc_types_tl values(123);
SELECT   union_id.item_id,
         b.org_id ,
         e.name ,
         fun1(union_id.item_id) item_no   --> to get item_no
         FORM xxc_transactions a,
         xxc_items             b,
         xxc_headers           c,
         xxc_lines             d,
         xxc_types_tl          e,
         ( SELECT item_id
             FROM   xxc_uinon_table ) union_id
WHERE    a.type_id= 6
AND      a.item_id = b.item_id
AND      union_id.item_id = b.item_id
AND      a.org_id = b.org_id
AND      c.header_id = d.header_id
AND      d.line_id= a.trx_line_id
AND      d.item_id= b.item_id
AND      c.order_id= e.transaction_id ---106
AND      b.org_id = 12
GROUP BY union_id.item_id,
         b.org_id ,
         e.name
ORDER BY union_id.item_id;
Note: xxc_uinon_table is a combination of UNION's
select 1 from dual
union
select 1 from dual
union
select no rows returned from dual;
I will get 1 from the above Query
Thank you in advanced

Can Designer generate ADF Entity Objects, View Objects and Apps Module ?

Hi all,
On what way can Designer integrate with JDeveloper (+ ADF) ?
Can Designer generate ADF Entity Objects, View Objects and Apps Module ?
Thank you for your help,
xtanto

Designer itself has no direct integration with JDeveloper. However, there are three options. First of all, you can get a JDeveloper extension (download this separately) that lets you create a Connection to a Designer repository. From that Connection you can find modules that you defined in Designer and generate Entity and View objects for the tables and columns that you used in those modules, and an Application Module. It does not create JSPs or other user interface objects.
Another option is to buy JHeadstart from Oracle. This contains a set of code generators and ADF extensions that include an ability to get information from a Designer repository. JHeadstart works fine for non-Designer users too, but was built by the same people who wrote Designer Headstart - they know the repository API intimately.
The third option is to download Oracle Designer Extension Builder (ODEB) which was just recently made available. This is a product of a collaboration between Designer users from the Oracle Development Tools Users Group (ODTUG) and Oracle to extend the capabilities of Designer with user written tools and utilities. You could use ODEB to write your own generators for ADF Business Components. Or you could wait and see if someone else in the user community does this. I hope that you or whoever does such a generator will be willing to share it with us all.

AWM Plugins and Object View

I'm trying to create a java plugin for AWM that is only valid for items in Object view (eg Variables, Programs etc... all the primitive Express objects).
According to the interface defined for AWMPlugin methods:
void handle(Frame parent, Connection conn, String type, Object obj,
AW aw, Map param);The 'type' and 'obj' represent either a String or an Object that is associated with the selected tree item, or null.
My problem is that type and obj are always null when operating in Object view, but pass a non-null value in Model view .
Has anyone encountered this? Does it mean the AWM plugin interface is only valid for the Model view?
Does anyone know of a way to get a handle to something like a Variable or Program in Object view using the AWMPlugin interface?

I am certainly not an expert on this but this would be my thoughts on this topic -
AWM plugins are supposed to only work on model view since this view over the AW uses the public APIs called Standard Form. The Object view uses a non-public API which addresses the internal AW catalog (i.e. the NAME dimension). Therefore, it would not surprise me that the API you are calling returns NULL when you try to access non-Standard Form objects.
I will try and contact one of the OLAP PM's this afternoon and get his opinion and let you know.
Keith Laker
Oracle EMEA Consulting
BI Blog: http://oraclebi.blogspot.com/
DM Blog: http://oracledmt.blogspot.com/
BI on Oracle: http://www.oracle.com/bi/
BI on OTN: http://www.oracle.com/technology/products/bi/
BI Samples: http://www.oracle.com/technology/products/bi/samples/

Mapping Variables(Object View) to Measures(Model View)

Hi,
In my AW, I have created a cube, And then I have created a new variable in the object view and populated it using load programs. Now. when I try to create a measure in the model view of the same cube based on this variable, I cannot see any option for assigning a variable to a measure. Can someone please help me out in doing this?
I need the measure in the model view, because it looks like, when I create a relational view, only the measures that are defined in the model are added to the view and not the variables available in the object model.
Thanks,
Bharat

Hi Bharat,
The mapping editor is used to map a measure to a relational data source. Therefore, unless you convert your data source used by your DML program to a relational table/view (if it is a text file you can use an external table to present the data to AWM as a relational table, or if it is an Excel spreadsheet and your database is on Windows you can use the heterogenous gateway service to load directly from Excel by exposing the Excel worksheet as a relational table) you will not be able to use the mapping editor.
To assign an OLAP variable to an measure within a cube you will need to create a custom calculated measure. This will allow you to create a measure that "maps" to your OLAP DML program. There is an Excel utility on the OLAP OTN home page that allows you to create custom calculated measures (at the moment this feature is not AWM10gR2 - but is available within AWM 11g). Click here for more information:
http://download.oracle.com/otn/java/olap/SpreadsheetCalcs_10203.zip
My advice would be to try and convert your data source to a relational table/view and using the mapping editor. This will allow you to benefit from the many new features within OLAP cube storage such as compressed composites, data compression, paralled processing, partitioning and aggregation maps. Of course you can code all this manually but it is much easier to let AWM do all this for you via a few mouse clicks. Please note - that everything you build outside of the AWM model view has to be managed (defined, updated, backed up etc) by you rather AWM. So while there are lots of advantages of using OLAP DML, I personally always try to load data into my OLAP cubes using AWM mappings and save OLAP DML for providing the advanced types of analysis that make OLAP such an excellent calculation engine.
Hope this helps
Keith Laker
Oracle Data Warehouse Product Management
OLAP Blog: http://oracleOLAP.blogspot.com/
OLAP Wiki: http://wiki.oracle.com/page/Oracle+OLAP+Option
DM Blog: http://oracledmt.blogspot.com/
OWB Blog : http://blogs.oracle.com/warehousebuilder/
OWB Wiki : http://wiki.oracle.com/page/Oracle+Warehouse+Builder
DW on OTN : http://www.oracle.com/technology/products/bi/db/11g/index.html

Storing XML using XSU, object VIEW and INSTEAD OF trigger

Here is the point:
I've got 2 tables which are linked:
CREATE TABLE dept (
deptno NUMBER PRIMARY KEY,
deptname VARCHAR2(20)
CREATE TABLE emp (
empno NUMBER PRIMARY KEY,
empname VARCHAR2(20),
deptno NUMBER REFERENCES dept(deptno)
I've got the following message, which I want to insert in the tables using XSU (I already have a PL/SQL stored procedure which work perfectly for insertion into 1 table, using DBMS_XMLSave.insertXML or xmlgen.insertXML):
<DEPT>
<DEPTNO>10</DEPTNO>
<DEPTNAME>IT</DEPTNAME>
<EMP>
     <EMPNO>1</EMPNO>
     <EMPNAME>John</EMPNAME>
</EMP>
<EMP>
     <EMPNO>1</EMPNO>
     <EMPNAME>Phil</EMPNAME>
</EMP>
</DEPT>
So I've created the following object:
CREATE TYPE emp_t AS OBJECT
empno NUMBER,
empname VARCHAR2(20)
CREATE TYPE emplist_t AS TABLE OF emp_t;
CREATE TYPE dept_t AS OBJECT
deptno NUMBER,
deptname VARCHAR2(20),
emplist emplist_t
Now I understand that I should create an object VIEW and an INSTEAD OF trigger (That's what I read many times),
but I don't know how to structure the view and the trigger.
Could you help? (Example of a similar context, piece of code)
Thanks a lot
Marion

Hi John,
I have exactly the same issue as you experienced back in January. I have a complex data modelling requirement which requires the need to pivot rows into columns using ROW_NUMBER() and PARTITION clauses. To hide the complexity from the middle tier, I have created a database view and appropriate INSTEAD OF triggers and mapped my EO to the view. I have overriden the lock() method on the EO implementation class (to avoid ORA-02014) and would like to try the same solution you used with the pl/sql call to lock the record.
My question is, how did you manage the release of the lock if the transaction was not rolled back or committed by your application i.e. if the user closed the browser for instance.
In my naivity, I would like to think that the BC4J framework would release any locks for the database session when it found the servlet session to be terminated however my concern is that the lock would persist and cause complications.
Any assistance greatly appreciated (if you would be willing to supply your lock() method and pl/sql procedure logic I would be even more grateful!).
Many thanks,
Dave
London

Can't open a object view with mapinfo

i have created this object view (with toad 7.6 in a server oracle 9i ITA, i use mapinfo 7.5 ITA):
CREATE OR REPLACE FORCE VIEW PRG.VISTAMORD
(PIANO_STORIA_ID, ANAGR_ID, PIANO_ID, TIPOMOD_COD, ZTO,
PRG, PIANO_STATO, ATTO_DATA, ATTO_TIPO, ATTO_NUM,
PIANO_VARIANTE, PIANO_NOME, PIANO_NOTE, PIANO_POS_ARCH, PIANO_LEGGE,
ANAGR_COD_COM, MI_STYLE, MI_PRINX, GEOLOC, ST)
AS
SELECT a.Piano_storia_id, a.Anagr_id, a.Piano_id, a.tipomod_cod,
a.ZTO, a.PRG, b.piano_stato, b.atto_data, b.atto_tipo, b.atto_num,
     b.piano_variante, b.piano_nome, b.piano_note,
     b.piano_pos_arch, b.piano_legge, c.anagr_cod_com,
     d.mi_style, d.mi_prinx, d.geoloc, d.st
from (piano b inner join ((oggetti_storia a
inner join aux_indice e on (a.piano_storia_id=e.piano_storia_id)
          and (a.anagr_id=e.anagr_id) and
(a.piano_id=e.piano_id)) inner join anagrafica c on a.anagr_id = c.anagr_id)
     on b.piano_id = a.piano_storia_id) inner join oggetti_spazial d
          on a.anagr_id = d.anagr_id
where ((a.tipomod_cod)<>'DEL')
order by piano_storia_id;
where oggetti_spazial is a object table (a mapinfo map imported in Oracle)
if i don't add the order by clause the view is ok and i can open it in mapinfo,
with the order by clause, when i try to open the view mapinfo give the error:
"errore Oracle: ORA-00600: codice errore INT., argom.:[15819],[5582],[],[],[],[],[],[]. Impossibile recuperare i record nella tavola.
can You Help me?

Hi Gabriel,
I think with enough patience one could get the ASCII DataPlugin Wizard to create a DataPlugin that would work for your file, but the resulting code generated by the wizard is not easily understandable, and it would not have correctly devined the sampling rate from your file format. I've written a DataPlugin from scratch which correctly reads the data snippet you sent over. I included an implicit time channel so that you could easily see the time values inferred from the "SampleRate" line. The implicit time channel rerquires all the lines in the ASCII file to be parsed in order to figure out the correct channel length (line 58), so if you have large data files you should comment out the time channel lines (44, 45, 58) and use just the implict time information already encoded in the data channel waveform properties (for faster file indexing). Unless your files are verry large, though, I think you'll like the DataPlugin as it is.
Brad Turpin
DIAdem Product Support Engineer
National Instruments
Attachments:
Fischerg_TXT.zip ‏2 KB

Spatial vs. materialized views/query rewrite

Dear all,
we are trying to use Spatial (Locator) functionality together with performance optimization using materialized views and query rewrite, and it does not seem to work. Does anybody has experience with this?
The problem in more detail:
* There is a spatial attribut (vom Typ GEOMETRY) in our table;
* we define a materialized view on that table;
* we run a query that could be better answered using the materialized view with query rewrite;
*the optimizer does not choose the plan using the materialized view, query rewrite does not take place;
This happenes, even if neither the materialized view, nor the query contains the spatial attribut.
The explanation given by the procedure DBMS_MVIEW.Explain_Rewrite is:
"QSM-01064 query has a fixed table or view Cause: Query
rewrite is not allowed if query references any fixed tables or views"
We are using Oracle 9R2, Enterprise Edition, with locator. Nevertheless, it would also be interesting, if there is any improvement in 10g?
A more complicated task, using materialized views to optimize spatial operations (e.g., sdo_relate) would also be very interesting, as spatial joins are very expensive operations.
Thanks in advance for any comments, ideas!
Cheers,
Gergely Lukacs

Hi Dan,
thanks for your rapid response!
A simple example is:
alter session set query_rewrite_integrity=trusted;
alter session set query_rewrite_enabled=true;
set serveroutput on;
/* Creating testtable */
CREATE TABLE TESTTABLE (
KEY1 NUMBER (4) NOT NULL,
KEY2 NUMBER (8) NOT NULL,
KEY3 NUMBER (14) NOT NULL,
NAME VARCHAR2 (255),
X NUMBER (9,2),
Y NUMBER (9,2),
ATTR1 VARCHAR2 (2),
ATTR2 VARCHAR2 (30),
ATTR3 VARCHAR2 (80),
ATTR4 NUMBER (7),
ATTR5 NUMBER (4),
ATTR6 NUMBER (5),
ATTR7 VARCHAR2 (40),
ATTR8 VARCHAR2 (40),
CONSTRAINT TESTTABLE_PK
PRIMARY KEY ( KEY1, KEY2, KEY3 ));
/* Creating materialized view */
CREATE MATERIALIZED VIEW TESTTABLE_MV
REFRESH COMPLETE
ENABLE QUERY REWRITE
AS SELECT DISTINCT ATTR7, ATTR8
FROM TESTTABLE;
/* Creating statistics, just to make sure */
execute dbms_stats.gather_table_stats(ownname=> 'TESTSCHEMA', tabname=> 'TESTTABLE', cascade=>TRUE);
execute dbms_stats.gather_table_stats(ownname=> 'TESTSCHEMA', tabname=> 'TESTTABLE_MV', cascade=>TRUE);
/* Explain rewrite procedure */
DECLARE
Rewrite_Array SYS.RewriteArrayType := SYS.RewriteArrayType();
querytxt VARCHAR2(1500) :=
'SELECT COUNT(*) FROM (
SELECT DISTINCT
ATTR8 FROM
TESTTABLE
i NUMBER;
BEGIN
DBMS_MVIEW.Explain_Rewrite(querytxt, 'TESTTABLE_MV', Rewrite_Array);
FOR i IN 1..Rewrite_Array.count
LOOP
DBMS_OUTPUT.PUT_LINE(Rewrite_Array(i).message);
END LOOP;
END;
The message you get is:
QSM-01009 materialized view, string, matched query text
Cause: The query was rewritten using a materialized view, because query text matched the materialized view text.
Action: No action required.
i.e. query rewrite works!
/* Adding geometry column to the testtable -- not to the materialized view, and not to the query! */
ALTER TABLE TESTTABLE
ADD GEOMETRYATTR mdsys.sdo_geometry;
/* Explain rewrite procedure */
DECLARE
Rewrite_Array SYS.RewriteArrayType := SYS.RewriteArrayType();
querytxt VARCHAR2(1500) :=
'SELECT COUNT(*) FROM (
SELECT DISTINCT
ATTR8 FROM
TESTTABLE
i NUMBER;
BEGIN
DBMS_MVIEW.Explain_Rewrite(querytxt, 'TESTTABLE_MV', Rewrite_Array);
FOR i IN 1..Rewrite_Array.count
LOOP
DBMS_OUTPUT.PUT_LINE(Rewrite_Array(i).message);
END LOOP;
END;
The messages you get are:
QSM-01064 query has a fixed table or view
Cause: Query rewrite is not allowed if query references any fixed tables or views.
Action: No action required.
QSM-01019 no suitable materialized view found to rewrite this query
Cause: There doesn't exist any materialized view that can be used to rewrite this query.
Action: Consider creating a new materialized view.
i.e. query rewrite does not work!
If this works, the next issue is to use materialized views for optimizing spatial operations, e.g., a spatial join. I can supply you with an example, if necessary (only makes sense, I think, after the first problem is solved).
Thanks in advance for any ideas, comments!
Cheers,
Gergely

Problem with object view with primary-key based object identifier

Hello!
I met such problem.
t1 is persinstent-capable class:
class t1 : public PObject { .... };
T1OV is object view, based on object table T1OT
I1 is primary key of the table T1OT.
Next code:
t1* t = new (conn, "T1OV") t1(...);
conn->commit();
try
t->markDelete();
conn->commit(); // exception throws here
Works fine if T1OV defined as:
create view t1ov of t1 with object identifier default
as select * from t1ot;
And throws an exception
"ORA-22883: object deletion failed"
if:
create view t1ov of t1 with object identifier (I1)
as select * from t1ot;
Such problem also occurs when object view is based on relational table/view (OID is primary-key based).
Also it occurs when
t->markModified() used insted of t->markDelete()
I am using Oracle 9i second release for windows and
MS VC++
Thank You

http://download-uk.oracle.com/docs/cd/B10501_01/server.920/a96540/statements_85a.htm#2065512
You can specify constraints on views and object views. You define the constraint at the view level using the out_of_line_constraint clause. You define the constraint as part of column or attribute specification using the inline_constraint clause after the appropriate alias.
Oracle does not enforce view constraints. However, operations on views are subject to the integrity constraints defined on the underlying base tables. This means that you can enforce constraints on views through constraints on base tables.
Restrictions on View Constraints
View constraints are a subset of table constraints and are subject to the following restrictions:
You can specify only unique, primary key, and foreign key constraints on views. However, you can define the view using the WITH CHECK OPTION clause, which is equivalent to specifying a check constraint for the view.
Because view constraints are not enforced directly, you cannot specify INITIALLY DEFERRED or DEFERRABLE.
View constraints are supported only in DISABLE NOVALIDATE mode. You must specify the keywords DISABLE NOVALIDATE when you declare the view constraint, and you cannot specify any other mode.
You cannot specify the using_index_clause, the exceptions_clause clause, or the ON DELETE clause of the references_clause.
You cannot define view constraints on attributes of an object column.
Rgds.

Object View Query.

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