Partitioning oracle table on varchar2 field

hi all,
i would like to know if one can create table partitions based on varchar2 data type. if possible please tell me which type of partition is best suited and also whether the same can be done in oracle version 8i.
thanks in advance
thomaskparkash

thomas k wrote:
hi all,
i would like to know if one can create table partitions based on varchar2 data typeYes. See example in http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/partiti.htm#sthref2596.
thomas k wrote:
if possible please tell me which type of partition is best suited.There is no single answer for a such a broad question. It depends on your data model and the queries you intend to run.
Please read general recommandations about partition types in Admin. Guide:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/partiti.htm#i1006194

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Need help for SQL SELECT query to fetch XML records from Oracle tables having CLOB field

Hello,
I have a scenario wherein i need to fetch records from several oracle tables having CLOB fields(which is holding XML) and then merge them logically to form a hierarchy XML. All these tables are related with PK-FK relationship. This XML hierarchy is having 'OP' as top-most root node and ‘DE’ as it’s bottom-most node with One-To-Many relationship. Hence, Each OP can have multiple GM, Each GM can have multiple DM and so on.
Table structures are mentioned below:
OP:
Name                             Null                    Type
OP_NBR                    NOT NULL      NUMBER(4)    (Primary Key)
OP_DESC                                        VARCHAR2(50)
OP_PAYLOD_XML                           CLOB
GM:
Name                          Null                   Type
GM_NBR                  NOT NULL       NUMBER(4)    (Primary Key)
GM_DESC                                       VARCHAR2(40)
OP_NBR               NOT NULL          NUMBER(4)    (Foreign Key)
GM_PAYLOD_XML                          CLOB
DM:
Name                          Null                    Type
DM_NBR                  NOT NULL         NUMBER(4)    (Primary Key)
DM_DESC                                         VARCHAR2(40)
GM_NBR                  NOT NULL         NUMBER(4)    (Foreign Key)
DM_PAYLOD_XML                            CLOB
DE:
Name                          Null                    Type
DE_NBR                     NOT NULL           NUMBER(4)    (Primary Key)
DE_DESC                   NOT NULL           VARCHAR2(40)
DM_NBR                    NOT NULL           NUMBER(4)    (Foreign Key)
DE_PAYLOD_XML                                CLOB
+++++++++++++++++++++++++++++++++++++++++++++++++++++
SELECT
j.op_nbr||'||'||j.op_desc||'||'||j.op_paylod_xml AS op_paylod_xml,
i.gm_nbr||'||'||i.gm_desc||'||'||i.gm_paylod_xml AS gm_paylod_xml,
h.dm_nbr||'||'||h.dm_desc||'||'||h.dm_paylod_xml AS dm_paylod_xml,
g.de_nbr||'||'||g.de_desc||'||'||g.de_paylod_xml AS de_paylod_xml,
FROM
DE g, DM h, GM i, OP j
WHERE
h.dm_nbr = g.dm_nbr(+) and
i.gm_nbr = h.gm_nbr(+) and
j.op_nbr = i.op_nbr(+)
+++++++++++++++++++++++++++++++++++++++++++++++++++++
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Current O/P:
<resultSet>
     <Record1>
          <OP_PAYLOD_XML1>
          <GM_PAYLOD_XML1>
          <DM_PAYLOD_XML1>
          <DE_PAYLOD_XML1>
     </Record1>
     <Record2>
          <OP_PAYLOD_XML2>
          <GM_PAYLOD_XML2>
          <DM_PAYLOD_XML2>
          <DE_PAYLOD_XML2>
     </Record2>
     <RecordN>
          <OP_PAYLOD_XMLN>
          <GM_PAYLOD_XMLN>
          <DM_PAYLOD_XMLN>
          <DE_PAYLOD_XMLN>
     </RecordN>
</resultSet>
Now i want to change my SQL query so that i get following output structure:
<resultSet>
     <Record>
          <OP_PAYLOD_XML1>
          <GM_PAYLOD_XML1>
          <GM_PAYLOD_XML2> .......
          <GM_PAYLOD_XMLN>
          <DM_PAYLOD_XML1>
          <DM_PAYLOD_XML2> .......
          <DM_PAYLOD_XMLN>
          <DE_PAYLOD_XML1>
          <DE_PAYLOD_XML2> .......
          <DE_PAYLOD_XMLN>
     </Record>
     <Record>
          <OP_PAYLOD_XML2>
          <GM_PAYLOD_XML1'>
          <GM_PAYLOD_XML2'> .......
          <GM_PAYLOD_XMLN'>
          <DM_PAYLOD_XML1'>
          <DM_PAYLOD_XML2'> .......
          <DM_PAYLOD_XMLN'>
          <DE_PAYLOD_XML1'>
          <DE_PAYLOD_XML2'> .......
          <DE_PAYLOD_XMLN'>
     </Record>
<resultSet>
Appreciate your help in this regard!

Hi,
A few questions :
How's your first query supposed to give you an XML output like you show ?
Is there something you're not telling us?
What's the content of, for example, <OP_PAYLOD_XML1> ?
I don't think it's a good idea to embed the node level in the tag name, it would make much sense to expose that as an attribute.
What's the db version BTW?

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ncsthbell wrote:
Mainframe legacy data has been copied straight from the legacy tables into mirrored tables in Oracle. Not a wise thing to do. Mainframe operating systems typically use EBCDIC and Unix and Windows servers use ASCII. The endian is also different (big endian vs little endian).
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Read xml into oracle table

Hi,
How can I read an xml.file read in an oracle table (invoice varchar2(20), invoice_line number, ship_date date, country varchar2(100))?
The xml looks like this:
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- 
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<item name="Invoice Line" type="xs:string" length="10" />
<item name="Ship Date" type="xs:date" />
<item name="COUNTRY" type="xs:string" length="8" />
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Hi,
Possible solutions will depend on your db version, which you didn't give.
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CREATE TABLE invoices (
invoice varchar2(20),
invoice_line number,
ship_date date,
country varchar2(100)
DECLARE
xmldoc xmltype := xmltype(
'<?xml version="1.0" encoding="utf-8" ?>
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<metadata>
<item name="Invoice #" type="xs:string" length="42" />
<item name="Invoice Line" type="xs:string" length="10" />
<item name="Ship Date" type="xs:date" />
<item name="COUNTRY" type="xs:string" length="8" />
</metadata>
<data>
<row>
<value>26623</value>
<value>0001</value>
<value>2010-05-03</value>
<value>USA</value>
</row>
<row>
<value>26624</value>
<value>0001</value>
<value>2010-05-03</value>
<value>USA</value>
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<row>
<value>26624</value>
<value>0003</value>
<value>2010-05-03</value>
<value>USA</value>
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<row>
<value>26625</value>
<value>0001</value>
<value>2010-05-03</value>
<value>USA</value>
</row>
</data>
</dataset>'
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FROM XMLTable(
   XMLNamespaces(default 'http://developer.cognos.com/schemas/xmldata/1/'),
   '/dataset/data/row'
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   columns
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     ship_date    varchar2(10) path 'value[3]',
     country      varchar2(100) path 'value[4]'
END;
/If your XML document resides outside the database, you may also access it directly through a DIRECTORY object :
CREATE OR REPLACE DIRECTORY xmldir AS 'C:\oracle\invoices\xml';
INSERT INTO invoices (invoice, invoice_line, ship_date, country)
SELECT invoice, invoice_line, to_date(ship_date, 'YYYY-MM-DD'), country
FROM XMLTable(
XMLNamespaces(default 'http://developer.cognos.com/schemas/xmldata/1/'),
'/dataset/data/row'
passing xmltype( bfilename('XMLDIR', 'invoices.xml'), nls_charset_id('AL32UTF8') )
columns
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   invoice_line number        path 'value[2]',
   ship_date    varchar2(10) path 'value[3]',
   country      varchar2(100) path 'value[4]'
);Some docs about XMLTable and XML querying with Oracle :
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/functions228.htm#CIHGGHFB
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14259/xdb_xquery.htm#ADXDB1700
Edited by: odie_63 on 24 juin 2010 20:07

What Oracle Table contains Partition Key Field Name?

What Oracle table/view maintains the partition key field name?
All_Tab_Partitions does not appear to maintain such information.
When I use Toad -> Schema -> Tables -> Partitions, it lists the partition key field name that the partition is based.
Thank You

all_part_key_columns
or
USER_part_key_columns
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Partitioning of table in oracle 10g - How to Add

Hello Friends ,
Hope you are all fine and doing great.
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NOLOGGING
NOCOMPRESS
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NOLOGGING
NOCOMPRESS
TABLESPACE KAW_DATA
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MAXTRANS 255
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NOLOGGING
NOCOMPRESS
TABLESPACE KAW_DATA
PCTFREE 10
INITRANS 2
MAXTRANS 255
STORAGE (
INITIAL 64K
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MAXEXTENTS 2147483645
BUFFER_POOL DEFAULT
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2) Can I add partition even though the table has data ?
==========================
I tried to add partition ..say
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NOCOMPRESS
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PCTFREE 10
INITRANS 1
MAXTRANS 255
STORAGE (
INITIAL 64K
MINEXTENTS 1
MAXEXTENTS 2147483645
BUFFER_POOL DEFAULT
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You have partitions
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200912
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how to add partition between two partition
Edited by: pransuj on Mar 25, 2011 11:13 AM
Edited by: pransuj on Mar 25, 2011 11:14 AM

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I want to update date field in oracle table using database adaptor

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Pure SQL Exception.
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Typically can't just append a time zone (e.g. +11:00) either as many places have daylight savings so the value to appended is variable (you then need some way of determining what the value is... either Java Embedding or a Service).
As you mention it does depend on the use case but in many circumstances using Jaba Embedding, not as suggested above but with the appropriate Java.util.Calendar classes, is the best way to handle date and time in BPEL. Even still you need to ascertain the format of times external to the system and ensure you parse them correctly.
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Partitioning on a table on the field TIMESTAMP WITH TIME ZONE

Hi I have a very large size table which has grown to a size that we are not able to query it efficiently. We have decided to partition the table. But the issue is the table has a TIMESTAMP WITH TIME ZONE field and not DATE. I have found some links on the web which state this might cause an error. I am planning to create a temp table with the partition rules and at the same time copy data from the original one.
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I had to research on same topic. One of my teammates suggested few points that might help you also.
Advantages of partitioning:
1) Partitioning enables data management operations such data loads, index creation and rebuilding, and backup/recovery at the partition level, rather than on the entire table. This results in significantly reduced times for these operations.
2) Partitioning improves query performance. In some cases, the results of a query can be achieved by accessing a subset of partitions, rather than the entire table. Parallel queries/DML and Partition-wise Joins are also got benefited much.
3) Partitioning increases the availability of mission-critical databases if critical tables and indexes are divided into partitions to reduce the maintenance windows, recovery times, and impact of failures. (Each partition can have separate physical attributes such as pctfree, pctused, and tablespaces.)
Partitioning can be implemented without requiring any modifications to your applications. For example, you could convert a nonpartitioned table to a partitioned table without needing to modify any of the SELECT statements or DML statements which access that table. You do not need to rewrite your application code to take advantage of partitioning.
Disadvantages of partitioning:-
1) Advantages of partition nullified when you use bind variables.
Additional administration tasks to manage partitions viz. If situation arises for rebuilding of index then rebuilding should to be done for each individual partition.
2) Need more space to implement partitioning objects.
3) More time for some tasks, such as create non-partitioning indexes, collection of “global" statistics (dbms_stat’s granularity parameter to be set to GLOBAL. if sub partition are used then we have to set it to ALL).
4) Partition would implies a modification (of explain plan) for ALL the queries against the partitioned tables. So, if some queries use the choosing partition key and may greatly improve, some other queries not use the partition key and are dramatically bad impact by the partitioning.
5) To get the full advantage of partitioning (partition pruning, partition-wise joins, and so on), you must use the Cost Based Optimizer (CBO). If you use the RBO, and a table in the query is partitioned, Oracle kicks in the CBO while optimizing it. But because the statistics are not present, the CBO makes up the statistics, and this could lead to severely expensive optimization plans and extremely poor performance.
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Abou

Introduction of Oracle Table Partitions into PeopleSoft HRMS environment

I would like to pose a general question and see if anyone has found any published advice / suggestions from PeopleSoft or Oracle on this. I believe that Oracle table partitioning isn't supported through the PeopleTools application designer functionality. Most likely this is done for platform independence. However, we were thinking about implementing table partitioning for performance and the ability to refresh test instances with subsets worth of data instead of the entire database.
I know that this would be a substantial effort, but was wondering if anyone had any documentation on this type of implemention. I've read some articles from David Kurtz on the subject, and it sounds like these were all custom jobs for each individual client. Was looking for something more generic on this practice from PeopleSoft or Oracle...
Regards,
Jay

Thanks for the article Nicolas. I will add that to my collection, good reference piece.
I think you gasped the gist of the query, which was I know that putting partitioning into a PeopleSoft application is going to be highly specific to the client and application that you are running. But what I looking for was something like a baseline guide for implementing partitioning in a PeopleSoft application as a whole.
In other words, something like notifiaction that the application designer panels would be affected since they don't have the ability to manage partitions. Therefore, any changes to tables that would utilize partitioning would need to be maintained at the database level and no longer utilize the DDL generated from PeopleTools Application Designer. Other consideration would be, like maybe a list of tables that would be candidates for partitioning based on the application, in my case HRMS. And maybe, suggestions on what column should be used for partitioning, etc...All of which are touched on in your identified article about putting partitioning in at the database level for a generic application.
Thanks for your help, it is much appreciated...
Jay

Partitioning oracle table on varchar2 field

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