Reading Oracle objects

Hi
Did not find methods to read oracle objects.
So - is it possible to read/write objects like SDO_GEOM from ORACLE spatial ??
Toni

As noted in the release notes, this release of ODP.NET does not support Oracle Object data types.

Similar Messages

Crystal Report: failed to read parameter object

Hello -
I have a report that consists of numerous static parms and one dynamic parm. I can save the report to my desktop but cannot save it to BO 3.1 CMC Personal Folder (or any folder for that matter).
The dynamic parm does not use a LOV based on Business Views. A table associated with the same data source as the stored proc on which the Report itself is based provides two fields - a code field that is used in the Value and a name field which is used in the Description.
The specific error is:
"Failed to read data from report file <file name> Reason: failed to read parameter object".
All the normal things have been checked -
- VERIFied the database
- Ensured 'No Printer' is checked
- Ran the report (successfully) on the desktop (locally)
The data source is Oracle. The report can be saved to the CMC and run without problem if the dynamic parameter is deleted from the report.
The version of Crystal Reports is CR 2008 vers 12.04
I've seen numerous postings regarding LOVs and Business Views, especially surrounding security issues, but I've yet to see a note about a dynamic parameter based on a table....
Thanks

Hi!
Thanks for the response....
Re: check the "Enable Repository Refresh" checkbox
The SAVE failed with the Failed to read data from report file error.
When I went to the Bus View mgr, I found the LOV. It was set as a cascading prompt (not what I wanted when I set the parm) and could not edit it. No permissions.
I went back to the report and tried to edit the parm into which I had stuffed the LOV I can't touch in Bus Views, and found I can't open in the report canvas without logging into the repository.... which I did.... and went to edit the parm...can't open in the report canvas without logging into the repository.... which I did.... and went to edit the parm... You get the idea....
What I had WANTED to do is take a table with 2 fields in it - a NAME and a CODE field, create a dynamic parm, use the CODE field as the Value and the NAME field as a description. When I brought in the LOV, it came in as a cascading LOV... I needed to have the Description as the user fronted piece... but I can't seem to get there from here.....

Performance of mapping Oracle objects to Java classes

Hi,
By retrieving some test data from Oracle database in a Java application, I compared the traditional JDBC/RDBMS solution to JPublisher-generated-classes/Oracle-object-tables solution. The underlaying Oracle database and the client environment was the same in both tests. Although the table schemas were different, they represented the same data.
It seems that the traditional JDBC/RDBMS solution is much faster. Is this a reality or did I make a mistake somewhere?
BR,
Timo

I am also facing performance overhead when using Jpub generated
classes for the object types.
I am using 817 jdbc and jpub but my database is 816. I have seen
that following statements each take around 2-3 seconds to
execute. Is there any communication between driver and database
to resolve the object type ?
Please help.
cCallableStatement =
(OracleCallableStatement)m_cConnection.prepareCall("{call
list_unsync_appts_array(?,?,?,?,?,?,?,?)}");
((OracleCallableStatement)cCallableStatement).setCustomDatum(1,ct_number_arr);
cCallableStatement.registerOutParameter(2,OracleTypes.ARRAY,"T_EVENT_SUMMARY_ARR");
cCallableStatement.registerOutParameter(3,OracleTypes.ARRAY,"T_EVENT_DETAIL_ARR");
cCallableStatement.registerOutParameter(4,OracleTypes.ARRAY,"T_EVENT_SUMMARY_ARR");
cCallableStatement.registerOutParameter(5,OracleTypes.ARRAY,"T_EVENT_DETAIL_ARR");
cCallableStatement.registerOutParameter(6,OracleTypes.ARRAY,"T_EVENT_SUMMARY_ARR");
cCallableStatement.registerOutParameter(7,OracleTypes.ARRAY,"T_ATTENDEE_EMAIL_ARR");
cCallableStatement.registerOutParameter(8,OracleTypes.ARRAY,"T_ATTENDEE_EMAIL_ARR");
cCallableStatement.execute();

How to use Oracle objects in java code

Hi all!
I'm reading an xls and i need to fill me oracle objects with java code:
OBJECT_NAME OBJECT_TYPE
LETTURA_OBJ TYPE
LETTURA_OBJ TYPE BODY
In the past weeks i've been using both java code into oracle and oracle objects, but new i need to write those objects with data i read with java, anybody can help me?
I know that the easiest work around would be to put the data i read from the excel file into a table and then fill the oracle objects, but now i want to learn how to write directly those objects with a command like the following one:
a sample of the code i'm tryng to write:
CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED REPORT."Manage_Excel_ASMBS" AS
import java.io.*;
import java.io.IOException;
import jxl.*;
public cass ....
#sql{ variabili_globali.var_ER_F3.Tipo_Lettura := 5}
thanks,
Massimo
Edited by: LinoPisto on 16-mag-2011 16.38

mmmh i'm not understanding so much....
well... as i told before i'm working in oracle database environment and i'm developing a java procedure.
now, i have this object
CREATE OR REPLACE
TYPE REPORT.FATTURA_OBJ AS OBJECT (
POD VARCHAR2(1000),
ID_FATTURA NUMBER,
ID_FILE NUMBER,
COERENZA_EA_F VARCHAR2(1000),
COERENZA_ER_F VARCHAR2(1000),
COERENZA_EA_M VARCHAR2(1000),
COERENZA_EF_M VARCHAR2(1000),
ANOMALIA VARCHAR2(1000),
MOTIVO_INVALIDAZIONE VARCHAR2(1000),
MATRICOLA_CONTATORE VARCHAR2(1000),
POTENZA_DISPONIBILE VARCHAR2(1000),
MEMBER PROCEDURE pulisci
/and i need to work with it inside this procedure:
CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED REPORT."Manage_Excel_ASMBS" AS
import java.io.*;
import java.io.IOException;
import java.io.StringWriter;
public class Manage_Excel_ASMBS
public static void read_Excel(String inputFile,int var_Id_Caricamento, int var_Id_Distributore, String var_Distributore) throws SQLException, IOException
**here i need to put what i'm reading inside the excel file into oracle objects**
/can you please give me a sample ?
thanks

Use of Complex Oracle Object with JDBC

How can I use Oracle Object(or PL/Sql type) with JDBC
I have a structure of record with some attributes and table of another attribute.
My types are defined as follows !
<code>
CREATE TYPE EMPLOYEE_GRADES AS TABLE OF VARCHAR2(50)
CREATE TYPE EMPLOYEES AS OBJECT(EmpName VARCHAR2(50), EmpGrades Employee_Grades)
</code>
My custom object might have the following structure (or should it be different)
<code>
public class EmpColl implements CustomDatum, CustomDatumFactory
-- other stuff ----
/* fields */
public String empName;
public Collection empNos;
</code>
I want to pass an variable of type EMPLOYEES to an procedure.
Thanx in Advance
Chetan
[email protected]

<code>
CREATE TYPE EMPLOYEE_GRADES AS TABLE OF VARCHAR2(50)
CREATE TYPE EMPLOYEES AS OBJECT(EmpName VARCHAR2(50), EmpGrades Employee_Grades)
</code>The easiest is to use JPublisher (which comes with the SQLJ distribution).
Say:
jpub -user=username/password -sql=EMPLOYEES:Employees,EMPLOYEE_GRADES:EmployeeGrades
You will get (among others) the Java files Employees.java and EmployeeGrade.java. Go ahead, compile and use them.
Look in [Oracle Home]/sqlj/demo/jpub for a number of additional examples, and in the JPublisher User's Guide for background info.
The next (9.2) release of JPublisher will also provide some support for accessing legacy PL/SQL types from Java.

Oracle Objects and Domains in Java Server Pages

We have defined this object in a Oracle 816 Enterprise:
CREATE TYPE DESCRIPTOR AS OBJECT
( ID VARCHAR2(30),
DESCRIPTOR VARCHAR2(80))
create TYPE descriptor_table AS VARRAY(30) of DESCRIPTOR
create table foo_test
(foo_test_id varchar2(10),
descrip descriptor_TABLE )
ALTER TABLE foo_test
ADD CONSTRAINT BIBL_test_PK PRIMARY KEY (foo_test_id)
then we have created in JDeveloper 3.1 an Entity (footest) object and a Domain (DescriptorDom) for the type DESCRIPTOR; then set the type of attribute descript to mypackage.DescriptorDom
After that, we created a JavaServer Page as follows:
<jsp:useBean class="oracle.jbo.html.databeans.JSRowSetBrowser" id="abean" scope="request" >
<% abean.setShowCurrentRow(true); abean.setVisibleRows(10); abean.setShowRecordNumbers(true); abean.setReleaseApplicationResources(false); abean.setDisplayAttributes("FooTestId,Descrip"); abean.initialize(pageContext,"ot_logics_LogicsModule.FooTestView");
abean.render();%>
</jsp:useBean>
The execution of JSP shows the error:
java.lang.ClassCastException
void oracle.jbo.domain.Struct.convertArrayToStruct()
java.lang.Object oracle.jbo.domain.Struct.getAttribute(int)
java.lang.String oracle.jbo.domain.Struct.toString()
void oracle.jbo.html.databeans.JSRowSetBrowser.internalInitialize()
void oracle.jdeveloper.html.WebBeanImpl.initialize(javax.servlet.ServletContext, javax.servlet.http.HttpSession,
javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.io.PrintWriter)
void oracle.jdeveloper.html.DataWebBeanImpl.initialize(javax.servlet.ServletContext, javax.servlet.http.HttpSession,
javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.io.PrintWriter, java.lang.String)
void oracle.jdeveloper.html.DataWebBeanImpl.initialize(javax.servlet.jsp.PageContext, java.lang.String)
void ot_pages_html.bibl_test._jspService(javax.servlet.http.HttpServletRequest,
javax.servlet.http.HttpServletResponse)
void oracle.jsp.runtime.HttpJsp.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
void oracle.jsp.app.JspApplication.dispatchRequest(javax.servlet.http.HttpServletRequest,
javax.servlet.http.HttpServletResponse)
void oracle.jsp.JspServlet.doDispatch(oracle.jsp.app.JspRequestContext)
void oracle.jsp.JspServlet.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
void javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
void oracle.lite.web.JupServlet.service(oracle.lite.web.JupRequest, oracle.lite.web.JupResponse)
void oracle.lite.web.MimeServletHandler.handle(oracle.lite.web.JupApplication, java.lang.String, int,
oracle.lite.web.JupRequest, oracle.lite.web.JupResponse)
void oracle.lite.web.JupApplication.service(oracle.lite.web.JupRequest, oracle.lite.web.JupResponse)
void oracle.lite.web.JupAppHandler.handle(oracle.lite.web.JupRequest, oracle.lite.web.JupResponse)
void oracle.lite.web.HTTPServer.include(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
void oracle.lite.web.HTTPServer.forward(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
boolean oracle.lite.web.HTTPServer.handleRequest(oracle.lite.web.JupInputStream, java.io.OutputStream)
boolean oracle.lite.web.JupServer.handle(oracle.lite.web.JupInputStream, java.io.OutputStream)
void oracle.lite.web.JupHTTPListener$JupHTTP.run()
Please JTeam, could you illuminate me about how implement ORACLE objects in Entity object s and JavaServer Pages?
ps The code generated by JPublisher seems be more complete that done by wizard of Domains. We sould use JPublisher?. How set the attribute type?
Thank in advance.
J Luis

Hi,
It looks like this might be a bug. I am going to use the information you supplied to file a bug so our QA team can investigate.
We have had problems with arrays of structs, but hope to have them fixed with our next release.

Oracle Object Types vs. Table Fields

Hello, all.
I`m totally new to Oracle, and I am facing a very hard problem for me, and I would like to ask your help.
I've been working on a project which uses Oracle Object Types, from a database of a legacy system.
I did not know Oracle Objects until 5 minutes ago, so sorry If I say something stupid:
Per my understanding, a Oracle Object Type can be formed by fields like myField varchar(200)... and fields from an existing table or view.
I have a lot of objects on my system and I need to map each field and its respective table or view that compose each object.
Does anyone have a query for that? I think it should be common, but I could not find anything at google (maybe I don`t which terms use to find...)
I would be very thankful if somebody could help (save) me.
Thanks in advance.
Paulo

First, it would help if you post what you object types look like.
I'm assuming they may look something like this:
SQL> create TYPE emp_type AS OBJECT
2    (emp_id   NUMBER,
3     name VARCHAR2(20));
4 /
Type created.
SQL> create TYPE emp_tab IS TABLE OF emp_type;
2 /
Type created.
SQL> create or replace package emp_test as
2 procedure get_emps;
3 end emp_test ;
4 /
Package created.
SQL> create or replace package body emp_test as
2    employees emp_tab := emp_tab();
3    procedure get_emps as
4      g_rc sys_refcursor;
5 BEGIN
6    employees.EXTEND(2);
7    employees(1) := emp_type (1, 'John Smith');
8    employees(2) := emp_type (2, 'William Jones');
9    OPEN g_rc FOR
10    SELECT * FROM TABLE (CAST (employees AS emp_tab));
11 END get_emps ;
12 end emp_test ;
13 /
Package body created.

Oracle object cols and inserts

hi,
i have a type defined as follows
create type foo
a number(10),
b number(10),
c date, d date);
now i use this in a table as follows
create table test
foo_obj foo default foo(-1, -1, sysdate, sysdate) not null,
foo_name varchar2(100) not null
now what im really interested in is when i do
an insert id like to specify only some of
the values for a given obj
aka
insert into test(foo_obj, foo_name)
values (foo_obj.a(10), 'test')
so the rest of the values for that obj
come from the defaults specified..
ive been unable to find examples for the above method in the 8i docs & any help here
on the correct syntax with an example would
help enormously
thanx
pete
null

Oracle® Database Object-Relational Developer's Guide
Also note that object relational database design is often less performant and scalable than relational. It is not very often used in production environments.
However, the object orientated programming feature that is provided with Oracle object feature set are used and can make development and interfaces a lot easier.
So in a nutshell. Say no to ref and nested table columns. Say yes to most of the other object features. IMO of course...

Oracle Object Table Type

I have an application that I would like to map bc4j to a object type hierarchy in the database. From reading previous otn threads I'm under the impression that Domains are not used for Oracle Table Types, just for columns based on oracle types. The thread later goes on to say that for the base type (person_typ) I would map a entity object to the table(person_table) mapped to the base type. To map all the sub-types I would create new entity objects and have PersonEO subclassed into StudentEO and EmployeeEO.
I have done this and it's unclear to me when I subclass PersonEO as StudentEO how do I declare that StudentEO is of oracle object type student_typ?
I'm also having problems with inserting data into the base entity obect. Here's code:
PersonVOImpl personVo = am.getPersonVO();
PersonVORowImpl row = (PersonVORowImpl)personVo.createRow();
personVo.insertRow(row);
row.setName("Mark");
row.setPhone("911");
am.getTransaction().commit();
personVo.executeQuery();
while (personVo.hasNext()){
PersonVORowImpl personRow = (PersonVORowImpl)personVo.next();
The data gets comitted to the db correctly but when the code hits personVo.executeQuery() I get the following error:
oracle.jbo.domain.DataCreationException: JBO-25009: Cannot create an object of type:oracle.sql.STRUCT with value:Mark
     at oracle.jbo.domain.TypeFactory.get(TypeFactory.java:687)
     at oracle.jbo.domain.TypeFactory.getInstance(TypeFactory.java:80)
     at oracle.jbo.server.OracleSQLBuilderImpl.doLoadBulkFromResultSet(OracleSQLBuilderImpl.java:1113)
     at oracle.jbo.server.ViewRowImpl.populate(ViewRowImpl.java:2017)
     at oracle.jbo.server.ViewDefImpl.createInstanceFromResultSet(ViewDefImpl.java:1013)
     at oracle.jbo.server.ViewObjectImpl.createRowFromResultSet(ViewObjectImpl.java:2309)
     at oracle.jbo.server.ViewObjectImpl.createInstanceFromResultSet(ViewObjectImpl.java:2240)
     at oracle.jbo.server.QueryCollection.populateRow(QueryCollection.java:1698)
     at oracle.jbo.server.QueryCollection.fetch(QueryCollection.java:1552)
     at oracle.jbo.server.QueryCollection.get(QueryCollection.java:1008)
     at oracle.jbo.server.ViewRowSetImpl.getRow(ViewRowSetImpl.java:2791)
     at oracle.jbo.server.ViewRowSetIteratorImpl.doFetch(ViewRowSetIteratorImpl.java:2504)
     at oracle.jbo.server.ViewRowSetIteratorImpl.ensureRefreshed(ViewRowSetIteratorImpl.java:2368)
     at oracle.jbo.server.ViewRowSetIteratorImpl.refresh(ViewRowSetIteratorImpl.java:2569)
     at oracle.jbo.server.ViewRowSetImpl.notifyRefresh(ViewRowSetImpl.java:1641)
     at oracle.jbo.server.ViewRowSetImpl.execute(ViewRowSetImpl.java:577)
     at oracle.jbo.server.ViewRowSetImpl.executeQueryForMasters(ViewRowSetImpl.java:611)
     at oracle.jbo.server.ViewRowSetImpl.executeQuery(ViewRowSetImpl.java:593)
     at oracle.jbo.server.ViewObjectImpl.executeQuery(ViewObjectImpl.java:2886)
     at model.testing.main(testing.java:33)
Am I coding this correctly? I'm using jdev9032 for this. Are there any examples out there on how to correctly use bc4j with oracle object type tables?
Thanks in advance!
-Mark

Here is my ddl:
CREATE TYPE Person_typ AS OBJECT
( name VARCHAR2(30),
address VARCHAR2(100)) NOT FINAL
CREATE TABLE PERSON_TABLE OF PERSON_TYP
I map a entity object to person_table one for one and I edit the SYS_NC_OID$ property of updateable to never.
I then map a view object one for one to the entity object. The jbo trace I get when -Djbo.debugoutput=console is declared is the following (omitted everything before the db connected).[156] Successfully logged in
[157] JDBCDriverVersion: 9.0.1.4.0
[158] DatabaseProductName: Oracle
[159] DatabaseProductVersion: Personal Oracle9i Release 9.2.0.1.0 - Production With the Partitioning, OLAP and Oracle Data Mining options JServer Release 9.2.0.1.0 - Production
[160] ViewRowSetImpl's jbo.viewlink.consistent = false (0)
[161] Column count: 3
[162] Executing SQL in generateRefAndOID...
[163] select a.oid, make_ref(PERSON_TABLE, a.oid) from (select /*+ NO_MERGE +*/ sys_op_guid() as oid from dual) a
[164] OracleSQLBuilder Executing DML on: PERSON_TABLE (Insert)
[165] INSERT INTO PERSON_TABLE(NAME,ADDRESS) VALUES (:1,:2)
[166] BaseSQLBuilder: releaseSavepoint 'BO_SP' ignored
[167] PersonVO notify COMMIT ...
[168] Column count: 3
[169] ViewObject : Created new QUERY statement
[170] SELECT REF(PersonTable), PersonTable.NAME, PersonTable.ADDRESS FROM PERSON_TABLE PersonTable
[171] LoadBulkFromResultSet failed (2)
oracle.jbo.domain.DataCreationException: JBO-25009: Cannot create an object of type:oracle.sql.STRUCT with value:Mark
     java.lang.Object oracle.jbo.domain.TypeFactory.get(java.lang.Class, java.lang.Class, java.lang.Object)
          TypeFactory.java:687
     java.lang.Object oracle.jbo.domain.TypeFactory.getInstance(java.lang.Class, java.lang.Object)
          TypeFactory.java:80
     java.lang.Object[] oracle.jbo.server.OracleSQLBuilderImpl.doLoadBulkFromResultSet(oracle.jbo.server.AttributeDefImpl[], int, java.sql.ResultSet, int, oracle.jbo.server.DBTransactionImpl)
          OracleSQLBuilderImpl.java:1059
     void oracle.jbo.server.ViewRowImpl.populate(java.sql.ResultSet)
          ViewRowImpl.java:1964
     oracle.jbo.server.ViewRowImpl oracle.jbo.server.ViewDefImpl.createInstanceFromResultSet(oracle.jbo.server.ViewObjectImpl, oracle.jbo.server.QueryCollection, java.sql.ResultSet)
          ViewDefImpl.java:1019
     oracle.jbo.server.ViewRowImpl oracle.jbo.server.ViewObjectImpl.createRowFromResultSet(java.lang.Object, java.sql.ResultSet)
          ViewObjectImpl.java:2035
     oracle.jbo.server.ViewRowImpl oracle.jbo.server.ViewObjectImpl.createInstanceFromResultSet(oracle.jbo.server.QueryCollection, java.sql.ResultSet)
          ViewObjectImpl.java:1966
     oracle.jbo.server.ViewRowImpl oracle.jbo.server.QueryCollection.populateRow()
          QueryCollection.java:1395
     boolean oracle.jbo.server.QueryCollection.fetch(int)
          QueryCollection.java:1237
     java.lang.Object oracle.jbo.server.QueryCollection.get(int)
          QueryCollection.java:832
     oracle.jbo.Row oracle.jbo.server.ViewRowSetImpl.getRow(int)
          ViewRowSetImpl.java:2621
     void oracle.jbo.server.ViewRowSetIteratorImpl.doFetch(int)
          ViewRowSetIteratorImpl.java:2347
     void oracle.jbo.server.ViewRowSetIteratorImpl.ensureRefreshed()
          ViewRowSetIteratorImpl.java:2211
     void oracle.jbo.server.ViewRowSetIteratorImpl.refresh(boolean, boolean)
          ViewRowSetIteratorImpl.java:2412
     void oracle.jbo.server.ViewRowSetImpl.notifyRefresh(boolean, boolean)
          ViewRowSetImpl.java:1556
     void oracle.jbo.server.ViewRowSetImpl.execute(boolean, boolean)
          ViewRowSetImpl.java:548
     void oracle.jbo.server.ViewRowSetImpl.executeQuery()
          ViewRowSetImpl.java:564
     void oracle.jbo.server.ViewObjectImpl.executeQuery()
          ViewObjectImpl.java:2616
     void mypackage1.testing.main(java.lang.String[])
          testing.java:25
Exception in thread main
Process exited with exit code 1.
Please let me know if you need more information.
-Mark

ORACLE OBJECTS FOR OLE(OO4O) PERFORMANCE TUNING

제품 : ORACLE SERVER
작성날짜 : 1997-10-10
ODBC의 경우는 Block단위로 data를 Query하는데 비해 OLE의 경우는 한번에 전체
의 자료를 가져다가 Temporary storage space에 넣게 됩니다.
그래서 튜닝을 위해서는
Windows 3.1의 경우는 c:/windows/oraole.ini
WIN95의 경우는 HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\OO4O
parameters를 수정해야 합니다.
만일 위의 File이 없는 경우는 모든 변수가 Default로 설정된 경우이므로 인스톨
된 Help를 자세히 읽어보고 적용을 해야합니다.
FetchLimit이 가장 큰 영향을 끼치는 파라미터로, 일반적으로 이 값이 클수록
속도가 빨라지게 됩니다. 다음은 관련 자료입니다.
Tuning and Customization
A number of working parameters of Oracle Objects for OLE can be
customized. Access to these parameters is provided through the Oracle
initialization file, by default named ORAOLE.INI.
Each entry currently available in that file is described below. The location
of the ORAOLE.INI file is specified by the ORAOLE environment variable.
Note that this variable should specify a full pathname to the Oracle
initialization file, which is not necessarily named ORAOLE.INI. If this
environment variable is not set, or does not specify a valid file entry, then
Oracle Objects for OLE looks for a file named ORAOLE.INI in the Windows
directory. If this file does not exist, all of the default values
listed will apply.
You can customize the following sections of the ORAOLE.INI file:
[Cache Parameters]
A cache consisting of temporary data files is created to manage amounts
of data too large to be maintained exclusively in memory. This cache
is needed primarily for dynaset objects, where, for example, a single
LONG RAW column can contain more data than exists in physical
(and virtual) emory.
The default values have been chosen for simple test cases, running on a machine
with limited Windows resources. Tuning with respect to your machine and
applications is recommended.
Note that the values specified below are for a single cache, and that a separate
cache is allocated for each object that requires one. For example, if
your application contains three dynaset objects, three independent data
caches are constructed, each using resources as described below.
SliceSize = 256 (default)
This entry specifies the minimum number of bytes used to store a piece
of data in the cache. Items smaller than this value are allocated the
full SliceSize bytes for storage; items larger than this value are
allocated an integral multiple of this space value. An example of an
item to be stored is a field value of a dynaset.
PerBlock = 16 (default)
This entry specifies the number of Slices (described in the preceding
entry) that are stored in a single block. A block is the minimum unit
of memory or disk allocation used within the cache. Blocks are read
from and written to the disk cache temporary file in their entirety. Assuming a SliceSize of 256 and a PerBlock value of 16, then the block
size is 256 * 16 = 4096 bytes.
CacheBlocks = 20 (default)
This entry specifies the maximum number of blocks held in memory at any
one time. As data is added to the cache, the number of used blocks
grows until the value of CacheBlocks is reached. Previous blocks are
swapped from memory to the cache temporary disk file to make room for
more blocks. The blocks are swapped based upon recent usage. The total
amount of memory used by the cache is calculated as the product of
(SliceSize * PerBlock * CacheBlocks).
Recommended Values: You may need to experiment to find optimal cache parameter
values for your applications and machine environment. Here are some guidelines
to keep in mind when selecting different values:
The larger the (SliceSize * PerBlock) value, the more disk I/O is
required for swapping individual blocks. The smaller the (SliceSize * PerBlock) value, the
more likely it is that blocks will need to be swapped to or from disk.
The larger the CacheBlocks value, the more memory is required, but the
less likely it is that Swapping will be required.
A reasonable experiment for determining optimal performance might
proceed as follows:
Keep the SliceSize >= 128 and vary PerBlock to give a range of block
sizes from 1K through 8K.
Vary the CacheBlocks value based upon available memory. Set it high
enough to avoid disk I/O, but not so high that Windows begins swapping
memory to disk.
Gradually decrease the CacheBlocks value until performance degrades or
you are satisfied with the memory usage. If performance drops off,
increase the CacheBlocks value once again as needed to restore
performance.
[Fetch Parameters]
FetchLimit = 20 (default)
This entry specifies the number of elements of the array into which data
is fetched from Oracle. If you change this value, all fetched values
are immediately placed into the cache, and all data is retrieved from
the cache. Therefore, you should create cache parameters such that all
of the data in the fetch arrays can fit into cache memory. Otherwise,
inefficiencies may result.
Increasing the FetchLimit value reduces the number of fetches (calls
to the database) calls and possibly the amount of network traffic.
However, with each fetch, more rows must be processed before user
operations can be performed. Increasing the FetchLimit increases
memory requirements as well.
FetchSize = 4096 (default)
This entry specifies the size, in bytes, of the buffer (string) used for
retrieved data. This buffer is used whenever a long or long raw column
is initially retrieved.
[General]
TempFileDirectory = [Path]
This entry provides one method for specifying disk drive and directory
location for the temporary cache files. The files are created in the
first legal directory path given by:
1.The drive and directory specified by the TMP environment variable
(this method takes precedence over all others);
2.The drive and directory specified by this entry (TempFileDirectory)
in the [general] section of the ORAOLE.INI file;
3.The drive and directory specified by the TEMP environment variable; or
4.The current working drive and directory.
HelpFile = [Path and File Name]
This entry specifies the full path (drive/path/filename) of the Oracle Objects
for OLE help file as needed by the Oracle Data Control. If this entry cannot
be located, the file ORACLEO.HLP is assumed to be in the directory where
ORADC.VBX is located
(normally \WINDOWS\SYSTEM).

제품 : ORACLE SERVER
작성날짜 : 1997-10-10
ODBC의 경우는 Block단위로 data를 Query하는데 비해 OLE의 경우는 한번에 전체
의 자료를 가져다가 Temporary storage space에 넣게 됩니다.
그래서 튜닝을 위해서는
Windows 3.1의 경우는 c:/windows/oraole.ini
WIN95의 경우는 HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\OO4O
parameters를 수정해야 합니다.
만일 위의 File이 없는 경우는 모든 변수가 Default로 설정된 경우이므로 인스톨
된 Help를 자세히 읽어보고 적용을 해야합니다.
FetchLimit이 가장 큰 영향을 끼치는 파라미터로, 일반적으로 이 값이 클수록
속도가 빨라지게 됩니다. 다음은 관련 자료입니다.
Tuning and Customization
A number of working parameters of Oracle Objects for OLE can be
customized. Access to these parameters is provided through the Oracle
initialization file, by default named ORAOLE.INI.
Each entry currently available in that file is described below. The location
of the ORAOLE.INI file is specified by the ORAOLE environment variable.
Note that this variable should specify a full pathname to the Oracle
initialization file, which is not necessarily named ORAOLE.INI. If this
environment variable is not set, or does not specify a valid file entry, then
Oracle Objects for OLE looks for a file named ORAOLE.INI in the Windows
directory. If this file does not exist, all of the default values
listed will apply.
You can customize the following sections of the ORAOLE.INI file:
[Cache Parameters]
A cache consisting of temporary data files is created to manage amounts
of data too large to be maintained exclusively in memory. This cache
is needed primarily for dynaset objects, where, for example, a single
LONG RAW column can contain more data than exists in physical
(and virtual) emory.
The default values have been chosen for simple test cases, running on a machine
with limited Windows resources. Tuning with respect to your machine and
applications is recommended.
Note that the values specified below are for a single cache, and that a separate
cache is allocated for each object that requires one. For example, if
your application contains three dynaset objects, three independent data
caches are constructed, each using resources as described below.
SliceSize = 256 (default)
This entry specifies the minimum number of bytes used to store a piece
of data in the cache. Items smaller than this value are allocated the
full SliceSize bytes for storage; items larger than this value are
allocated an integral multiple of this space value. An example of an
item to be stored is a field value of a dynaset.
PerBlock = 16 (default)
This entry specifies the number of Slices (described in the preceding
entry) that are stored in a single block. A block is the minimum unit
of memory or disk allocation used within the cache. Blocks are read
from and written to the disk cache temporary file in their entirety. Assuming a SliceSize of 256 and a PerBlock value of 16, then the block
size is 256 * 16 = 4096 bytes.
CacheBlocks = 20 (default)
This entry specifies the maximum number of blocks held in memory at any
one time. As data is added to the cache, the number of used blocks
grows until the value of CacheBlocks is reached. Previous blocks are
swapped from memory to the cache temporary disk file to make room for
more blocks. The blocks are swapped based upon recent usage. The total
amount of memory used by the cache is calculated as the product of
(SliceSize * PerBlock * CacheBlocks).
Recommended Values: You may need to experiment to find optimal cache parameter
values for your applications and machine environment. Here are some guidelines
to keep in mind when selecting different values:
The larger the (SliceSize * PerBlock) value, the more disk I/O is
required for swapping individual blocks. The smaller the (SliceSize * PerBlock) value, the
more likely it is that blocks will need to be swapped to or from disk.
The larger the CacheBlocks value, the more memory is required, but the
less likely it is that Swapping will be required.
A reasonable experiment for determining optimal performance might
proceed as follows:
Keep the SliceSize >= 128 and vary PerBlock to give a range of block
sizes from 1K through 8K.
Vary the CacheBlocks value based upon available memory. Set it high
enough to avoid disk I/O, but not so high that Windows begins swapping
memory to disk.
Gradually decrease the CacheBlocks value until performance degrades or
you are satisfied with the memory usage. If performance drops off,
increase the CacheBlocks value once again as needed to restore
performance.
[Fetch Parameters]
FetchLimit = 20 (default)
This entry specifies the number of elements of the array into which data
is fetched from Oracle. If you change this value, all fetched values
are immediately placed into the cache, and all data is retrieved from
the cache. Therefore, you should create cache parameters such that all
of the data in the fetch arrays can fit into cache memory. Otherwise,
inefficiencies may result.
Increasing the FetchLimit value reduces the number of fetches (calls
to the database) calls and possibly the amount of network traffic.
However, with each fetch, more rows must be processed before user
operations can be performed. Increasing the FetchLimit increases
memory requirements as well.
FetchSize = 4096 (default)
This entry specifies the size, in bytes, of the buffer (string) used for
retrieved data. This buffer is used whenever a long or long raw column
is initially retrieved.
[General]
TempFileDirectory = [Path]
This entry provides one method for specifying disk drive and directory
location for the temporary cache files. The files are created in the
first legal directory path given by:
1.The drive and directory specified by the TMP environment variable
(this method takes precedence over all others);
2.The drive and directory specified by this entry (TempFileDirectory)
in the [general] section of the ORAOLE.INI file;
3.The drive and directory specified by the TEMP environment variable; or
4.The current working drive and directory.
HelpFile = [Path and File Name]
This entry specifies the full path (drive/path/filename) of the Oracle Objects
for OLE help file as needed by the Oracle Data Control. If this entry cannot
be located, the file ORACLEO.HLP is assumed to be in the directory where
ORADC.VBX is located
(normally \WINDOWS\SYSTEM).

Modifying coding in Oracle Objects

Is there any way like to remove the specific repeated lines from the oracle objects like Function,Procedures and Packages?.For examples my certain packages are composed of more than 10000 lines of code which contains lot of dbms_output.put_line statements with different parameters.I want to remove all such statements from a specific objects with a single shot.Pls suggest.
Regards
Manoj S

Updating source code from the data dictionary views is not allowed, nor supported. You can perform a CTAS plus decode functions from the user_source if you want and perform the operation on the newly created table. But either way this cannot be directly taken back from here to the data dictionary tables, you will have to create some sort of formatted spool from this table to have the object recreated by means of the regular command CREATE OR REPLACE ...
~ Madrid
http://hrivera99.blogspot.com/

Oracle objects

I have created a simple Object in Oracle 8i to represent a person
CREATE TYPE PERSON_T AS OBJECT
ID INTEGER,
FIRST VARCHAR(15),
LAST VARCHAR(15)
and I have created a table that uses this type as a column attribute. This worked fine and I was able to add data to the table and query it.
The problem is when I tried to access the database from JDBC using the SQLData interface with the latest drivers. I read the object with the call,
PersonT person = (PersonT) res.getObject(1);
person.id now contains the correct id, but the two string values just contain a memory address.
I can read other VARCHAR types that are not parts of objects, so why not these?
Is this a known bug and is there a work around?
Cheers,
Matt

The readSQL and writeSQL methods are very simple, and taken straight from an example.
public void readSQL(SQLInput stream, String type) throws SQLException {
sql_type = type;
id = stream.readInt();
fName = stream.readString();
lName = stream.readString();
public void writeSQL(SQLOutput stream) throws SQLException {
stream.writeInt(id);
stream.writeString(fName);
stream.writeString(lName);
Any suggestions?
Thanks,
Matt
null

Where are the data-binding frameworks for Oracle Objects?

Oracle offers a few different options for data-binding frameworks to Oracle relational data. Amongst them they include TopLink and the Oracle Application Development Framework (ADF)in JDeveloper 10G. J2EE also offers the EJB standard framework. Both of the Oracle data-binding frameworks appear to work well with relational data but fail miserably when one tries to work with a fully fledged Oracle Object-Relational schema. I have spend much time with ADF but have not been able to create successful bindings to Objects with nested complex objects (such as a 2-level nested object) or objects containing nested tables. TopLink will not even touch Object tables.
Have other people being more successful with this? Do we have to implement our own data binding framework? Does Oracle plan on improving these frameworks to fully support Oracle Objects?

TopLink Runtime supports both fully fledged OX mappings and nested complex objects. These mappings can be setup in the code.
TopLink ADF design time however currently does not have support for OX mappings.
Hope this helps,

Where are the Oracle Data Binding Frameworks for Oracle Objects?

Oracle offers a few different options for data-binding frameworks to Oracle relational data. Amongst them they include TopLink and the Oracle Application Development Framework (ADF)in JDeveloper 10G. J2EE also offers the EJB standard framework. Both of the Oracle data-binding frameworks appear to work well with relational data but fail misserably when one tries to work with a fully fledged Oracle Object-Relational schema. I have spend much time with ADF but have not been able to create successful bindings to Objects with nested complex objects (such as a 2-level nested object) or objects containing nested tables. TopLink will not even touch Object tables.
Have other people being more successful with this? Do we have to implement our own data binding framework? Does Oracle plan on improving these frameworks to fully support Oracle Objects?

TopLink Runtime supports both fully fledged OX mappings and nested complex objects. These mappings can be setup in the code.
TopLink ADF design time however currently does not have support for OX mappings.
Hope this helps,

Working with Oracle Objects in JAVA - How-to do with views

Hello,
I am trying to access to Oracle object types from Java.
My problem is, I have relational tables, Object Types and Object Views.
All the examples I found from Oracle manuals are working with Object Tables(Table column is created as Object Type).
You run a query and get this object type (oraconn.GetObject(1)) and the query is (SELECT * FROM Object_Table) so its get first column(which is an object type) and cast it to Java Class(with SQLDATA or ORADATA).
The problem is that my data is in Relational Tables and I don't want to export them to Object tables.
I want to get it from Object View.
Is this possible? Or better is anybody has an example???
Thx in advance

Hi,
I think you will be able to help me. your question made me to think that you will be able to help me. Here the question goes.
I have a Stored Procedure which returns a user defined ROWTYPE(its a IN OUT param to the procedure). I need to call this procedure from my Java program. So I would like to know how to do it. Do we need to use any packages provided by oracle or some thing like that.
thanks & regards,
Anil.
[email protected]

Reading Oracle objects

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