Exp XML Schema (.xsd) to another schema on same instance

Question

Hello,
I hope someone on this forum can help me or point me in the correct direction. I want to export a schema which contains a table (EQUIPMENT) which has a XMLType column defined against a registered .xsd. I would then like to restored this schema to another schema on the same instance (development instance) and also onto another db instance.
I have been trying to do this with the help of "Chapter 30 Importing and Exporting XMLType Tables" from the Oracle® XML DB Developer's Guide
10g Release 2 (10.2). Unfortunately without success. At the end of this message I have encluded sample error messages that I am receiving for creation of TYPES which is causing my import to fail.
I cannot find any examples on the web on how to achieve an exp from one schema and imp in another either on the same instance or another one.
DDL for my table is :
create table EQUIPMENT
ID number(7) not null,
STATUSID number(7) not null,
ATTRIBUTEDATA xmltype
xmltype column ATTRIBUTEDATA xmlschema "EQUIPMENT.xsd" element EQUIPMENT_XML
tablespace TBS_DATA1;
Three test runs as follows:
1. Using an empty u2 schema and I register the .xsd file. Then I try to import (FROMUSER - TOUSER imp mode) my dump file which leads to the following error:
IMP-00017: following statement failed with ORACLE error 2304:
"CREATE TYPE "MTA1440_T" TIMESTAMP '2007-11-14:14:42:16' OID '3EE57B10307317"
"74E044080020C94102' AS OBJECT ("SYS_XDBPD$" "XDB"."XDB$RAW_LIST_T",""
"ATTRIBUTE_01" NUMBER(38),"ATTRIBUTE_02" VARCHAR2(4000 CHAR),"ATTRIBUTE_03" "
"VARCHAR2(4000 CHAR),"ATTRIBUTE_04" NUMBER(38),"ATTRIBUTE_05" VARCHAR2(4000 "
"CHAR))FINAL INSTANTIABLE "
IMP-00003: ORACLE error 2304 encountered
NOTE: Even though import failed, I now see a new TYPE created called "MTA1526_T".
2. If I try to create the TYPE as is from the error above I get the following error:
SQL> CREATE TYPE MTA1440_T
2 OID '3EE57B1030731774E044080020C94102'
3 AS OBJECT (SYS_XDBPD$ XDB.XDB$RAW_LIST_T,
4 ATTRIBUTE_01 NUMBER(38),
5 ATTRIBUTE_02 VARCHAR2(4000 CHAR),
6 ATTRIBUTE_03 VARCHAR2(4000 CHAR),
7 ATTRIBUTE_04 NUMBER(38),
8 ATTRIBUTE_05 VARCHAR2(4000 CHAR)) FINAL INSTANTIABLE;
9 /
CREATE TYPE MTA1440_T
ERROR at line 1:
ORA-02304: invalid object identifier literal
3. So now I create the "MTA1440_T" type without the OID value and retry the import.
IMP-00061: Warning: Object type "U2"."MTA1440_T" already exists with a different identifier
"CREATE TYPE "MTA1440_T" TIMESTAMP '2007-11-14:14:42:16' OID '3EE57B10307317"
"74E044080020C94102' AS OBJECT ("SYS_XDBPD$" "XDB"."XDB$RAW_LIST_T",""
"ATTRIBUTE_01" NUMBER(38),"ATTRIBUTE_02" VARCHAR2(4000 CHAR),"ATTRIBUTE_03" "
"VARCHAR2(4000 CHAR),"ATTRIBUTE_04" NUMBER(38),"ATTRIBUTE_05" VARCHAR2(4000 "
"CHAR))FINAL INSTANTIABLE "
Questions from me:
A. Can I export TYPES only as suggested by the online documentation ?
B. If importing onto same instance in another schema surely the OID for the TYPE will always fail - so then why can the import not create the required TYPE name itself during the import ?
C. Should I use global TYPES and Register the .XSD globally for all schema's in an instance to validate against .. would this prevent me from having errors on an import ?
I would appreciate any insight any one could provide me. Many thanks in advance.
Dom

Answer 1

Hi Guys,
Thank you all for the replies. I am dissappointed to hear that in 10g does not support exp/imp of schema's structured XML. However I am a little confused or should I say mislead by the "" documentation I
Here is an extract from chapter "30 - Importing and Exporting XMLType Tables" from the Oracle XML DB 10g Developers Guide documentation:
"..... Oracle Database supports the import and export of XML schema-based XMLType tables. An XMLType table depends on the XML schema used to define it. Similarly the XML schema has dependencies on the SQL object types created or specified for it. Thus, exporting a user with XML schema-based XMLType tables, consists of the following steps:
1. Exporting SQL Types During XML Schema Registration. As a part of the XML
schema registration process .....
2. Exporting XML Schemas. After all the types are exported, XML schemas are
exported as XML text .....
3. Exporting XML Tables. The next step is to export the tables. Export of each table consists of two steps:
A. The table definition is exported as a part of the CREATE TABLE statement....
B. The data in the table is exported as XML text. Note that data for out-of-line
tables is.....
From this documentation I was under the impression that the exp/imp of XML Schema-Based XMLType Tables was supported.
Regarding the backup mechanism/strategy for database schema's containing tables with Schema-Based XMLTypes what would you recommend the best online backup method to use - tablespace backups ?
What I need to be able to do in day-to-day work is to have the ability to be able to take a copy of a customers UAT or production database schema and apply it to a dev or test db instance here for bug testing etc. Do you have any advice on best to achieve this without the use of an exp/imp when the schema will contain Schema-Based XMLType tables.
Thank you all for your assistance so far.