Creating XML Schema from tables With Constraints

Greetings,
I'd have an interesting question. I finally am getting familiar with the various kinds of xml solutions provided by the oracle database, but hey here I have another interesting question I can't seem to get into life. I'm currently generating XML Schemas (XSD) from the tables of my database. Its nice its cool however I'd need to have the table's constraints with the xsd:elements also. And heres my problem, I can't seem to insert the table constrains. I'll show you what I mean:
<xsd:element name="MESSAGE_TABLE">
<xsd:complexType>
    <xsd:sequence>
      <xsd:element name="MESSAGE_RECORD">
        <xsd:complexType>
          <xsd:all>
            <xsd:element name="ID" type="xsd:integer" minOccurs="1" />
            <xsd:element name="HEADER">
              <xsd:simpleType>
                <xsd:restriction base="xsd:string>
                  <xsd:maxLength value="255" />
                </xsd:restriction>
              </xsd:simpleType>
            </xsd:element>
          </xsd:all>
        </xsd:complexType>
      </xsd:element>
    </xsd:sequence>
</xsd:complexType>


<xsd:key name="PK_ID_PRIM">
    <xsd:selector xpath="." />
    <xsd:field xpath="ID" />
</xsd:key>

<xsd:keyref name="FK_HEADER_FOREIGN" refer="PK_HEADER_ID">
    <xsd:selector xpath="HEADER" />
    <xsd:field xpath="ID" />
</xsd:keyref>

<xsd:unique name="UQ_..." ... />
</xsd:unique>
</xsd:element>That would fit my business needs, however I may be so blind that I can't see the forest from the tree. Currently I got so far that:
          xmlElement
              "xsd:schema",
              xmlAttributes
                  'http://www.w3.org/2001/XMLSchema'      as "xmlns:xsd"
              xmlElement
                "xsd:element",
                xmlAttributes
                  target_table                            as "name"
                xmlElement
                  "xsd:complexType",
                  xmlElement
                    "xsd:sequence",
                    xmlElement
                      "xsd:element",
                      xmlAttributes
                        target_table || '_RECORD'         as "name",
                        'unbounded'                       as "maxOccurs"
                      xmlElement
                        "xsd:complexType",
                        xmlElement
                          "xsd:sequence",
                            xmlAgg(ELEMENT)
                xmlElement
                  "xsd:Key",
            )As you can see this won't be good since I have put a single xml element in there. I guess I'd need something more like an xmlAgg(CONSTRAINTS), however in that case I'm wondering how will the select's FROM part look like.
FROM
    SELECT table_name, internal_column_id,
            CASE
              WHEN data_type IN ('VARCHAR2', 'CHAR')
              THEN
                xmlElement
                  "xsd:element",
                  xmlattributes
                    column_name as "name",
                    decode(NULLABLE, 'Y', 0, 1) as "minOccurs"
                  xmlElement
                    "xsd:simpleType",
                    xmlElement
                      "xsd:restriction",
                      xmlAttributes
                        'xsd:string' as "base"
                      xmlElement
                        "xsd:maxLength",
                        xmlAttributes
                          DATA_LENGTH as "value"
              WHEN data_type = 'DATE'
              THEN
                xmlElement
                  "xsd:element",
                  xmlattributes
                    column_name as "name",
                    'xsd:date' as "type",
                    decode(NULLABLE, 'Y', 0, 1) as "minOccurs"
              WHEN data_type = 'NUMBER'
              THEN
                xmlElement
                  "xsd:element",
                  xmlattributes
                    column_name as "name",
                    decode(DATA_SCALE, 0, 'xsd:integer', 'xsd:double') as "type",
                    decode(NULLABLE, 'Y', 0, 1) as "minOccurs"
              ELSE
                xmlElement
                  "xsd:element",
                  xmlattributes
                    column_name as "name",
                    'xsd:anySimpleType' as "type",
                    decode(NULLABLE, 'Y', 0, 1) as "minOccurs"
    end ELEMENT
    FROM user_tab_cols c
    WHERE TABLE_NAME = target_table
    ORDER BY internal_column_id
GROUP BY TABLE_NAME;Thank you very much for all your help!
Regards,
Joey
Edited by: Wrath#87 on 2012.09.05. 22:15

Thanks for that, answer. That helped me a lot managing primary constraints. However I still have problems managing foreign keys. I come up with the following formula:
          xmlElement
              "xsd:schema",
              xmlAttributes
                  'http://www.w3.org/2001/XMLSchema'      as "xmlns:xsd"
              xmlElement
                  "xsd:element",
                  xmlAttributes
                      upper(target_table) as "name"
                  xmlElement
                      "xsd:complexType",
                      xmlElement
                        "xsd:all",
                            xmlAgg(ELEMENT)
                      SELECT    xmlElement
                                  "xsd:key",
                                  xmlattributes
                                    uc.constraint_name as "name"
                                  xmlElement
                                    "xsd:selector",
                                    xmlattributes
                                      '.' as "xpath"
                                  xmlAgg
                                    xmlElement
                                      "xsd:field",
                                      xmlattributes
                                        ucc.column_name as "xpath"
                                    order by ucc.position
                      FROM      user_constraints uc
                                JOIN      user_cons_columns ucc
                                ON        ucc.constraint_name   =   uc.constraint_name
                      WHERE     uc.table_name                   =   upper(target_table)
                      AND       uc.constraint_type              =   'P'
                      GROUP BY uc.constraint_name
                      SELECT    xmlElement
                                    "xsd:keyRef",
                                    xmlattributes
                                        a.constraint_name as "name"
                                    xmlElement
                                        "xsd:selector",
                                        xmlattributes
                                            c.table_name as "xpath"
                                    xmlAgg
                                        xmlElement
                                            "xsd:field",
                                            xmlattributes
                                                d.column_name as "xpath"
                                        order by c.table_name
                      FROM      all_constraints   a,
                                all_cons_columns b,
                                all_constraints   c,
                                all_cons_columns d
                      WHERE     a.constraint_name   =   b.constraint_name
                      AND       a.constraint_name   =   c.r_constraint_name
                      AND       c.constraint_name   =   d.constraint_name
                      AND       a.table_name        =   upper(target_table)
          )This gives me the following error message: 00937. 00000 - "not a single-group group function"

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EL1 VARCHAR(10),
EL2 VARCHAR(10),
EL3 VARCHAR(10),
Attr01 VARCHAR(10),
Attr02 VARCHAR(10),
Attr03 VARCHAR(10),
Attr04 VARCHAR(10)
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,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
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Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
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,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
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,Attr02 AS '@Attr02'
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,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
FROM Src
WHERE EL3 = 'E102010'
FOR XML PATH('E102010'),TYPE
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FROM Src
WHERE EL2 = 'E1020' AND (EL1 <>'' AND EL3 ='')
FOR XML PATH('E1020'),TYPE
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FROM Src
WHERE EL1 = 'E10' AND (EL2 ='' AND EL3 ='')
FOR XML PATH('E10'),TYPE) 'node()'
,(SELECT Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
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,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
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,Attr03 AS '@Attr03'
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If I get a few hundreds of rows, how huge the script should be. Does anyone have better solution for this? Thanks.
Tao

wBob,
Thanks! And sorry for late feedback.
The XSD requires the xml structures like the following
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<School02>Some other school</School02>
</Schools>
I have to use the number in the element name.
Right now I just use the nested FOR XML PATH, although I have to write thousand lines code.
Thanks anyway.
Tao
Tao

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Error report:
SQL Error: ORA-01408: such column list already indexed
*01408. 00000 - "such column list already indexed"*

Not too hard to check (the answer is yes by the way).
ME_XE?create table test_const(ename varchar2(50) not null,
key_num number not null,
descr varchar2(100),
constraint constraint_test_const unique (ename, key_num));
2    3    4
Table created.
Elapsed: 00:00:00.12
ME_XE?select index_name, index_type
from user_indexes where table_name = 'TEST_CONST';
2
INDEX_NAME                     INDEX_TYPE
CONSTRAINT_TEST_CONST          NORMAL
1 row selected.
Elapsed: 00:00:00.14
ME_XE?

Create a View from tables of different schemas

hi all,
can u pls give solution to create a View from tables of different schemas.
i have to bring data from one DB Server A,
which contains different schemas and tables in the schemas...
i need to insert that data in another DBServer B.
i made a procedure for this...
but when the connection fails from A, then i could not get data...
please suggest some solution..
thanks,
neelima

I don't know what database system you use, but in the most I know it is done that way:
SELECT
A.COL1,A.COL2.....
FROM
SCHEMA_NAME.TABLENAME A,
SCHEMA_NAME.TABLE_NAME B
WHERE
A.COL1 = B.COL2
...

How to create xml file from original

I have this complicated xml and I want to search through it and make a new xml with only element I find that match. what is the best way to do this? the file
is about 6mb and I want to read the whole file easily..should i load to database table and create a file from table? I have found issues reading the file..
- <ArrayOfJobClass xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
- <JobClass>
- <Triggers>
- <TriggerClass>
<ExpireActionType>Delete</ExpireActionType>
<ExpireType>DateTime</ExpireType>
<TriggerType>TimeType</TriggerType>
- <TTime>
<TimeTriggerType>Custom</TimeTriggerType>
<IntervalType>Daily</IntervalType>
<SpecificType>Days</SpecificType>
<FirstLastType>First</FirstLastType>
<IntervalValue>1</IntervalValue>
<FirstLastWeekDay>Monday</FirstLastWeekDay>
<InitDate>2009-05-04T14:17:05.40625-07:00</InitDate>
- <IntervalDays>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>
<boolean>false</boolean>

You can load it in the database in an XMLType table (Object-Relational or Binary XML storage), use XQuery on the XML content and then write back the result to a file.
Or, you might just use an external processor (XSLT or XQuery).
If you want to stay in the Oracle world, you can use :
- For XSLT : $ORACLE_HOME/bin/oraxsl (it's a wrapper for the java XSLT engine)
- For XQuery : the java XQuery API
Personally, I sometimes use the Saxon XSLT and XQuery processor, quite efficient.
Here's a simplistic example with oraxsl utility :
emp.xml
<?xml version="1.0" encoding="UTF-8"?>
<emps>
<emp id="7369">
    <name>SMITH</name>
    <job>CLERK</job>
    <salary>800</salary>
</emp>
<emp id="7499">
    <name>ALLEN</name>
    <job>SALESMAN</job>
    <salary>1600</salary>
</emp>
<emp id="7521">
    <name>WARD</name>
    <job>SALESMAN</job>
    <salary>1250</salary>
</emp>
<emp id="7566">
    <name>JONES</name>
    <job>MANAGER</job>
    <salary>2975</salary>
</emp>
<emp id="7654">
    <name>MARTIN</name>
    <job>SALESMAN</job>
    <salary>1250</salary>
</emp>
</emps>
emp.xsl
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml"/>
<xsl:template match="text()"/>
<xsl:template match="emps/emp[job='SALESMAN']">
<xsl:copy-of select="."/>
</xsl:template>
</xsl:stylesheet>Applying the transformation to search and extract all "salesmen" :
D:\ORACLE\test>%ORACLE_HOME%\bin\oraxsl emp.xml emp.xsl result.xml
D:\ORACLE\test>type result.xml
<?xml version = '1.0' encoding = 'UTF-8'?>
<emp id="7499">
    <name>ALLEN</name>
    <job>SALESMAN</job>
    <salary>1600</salary>
</emp><emp id="7521">
    <name>WARD</name>
    <job>SALESMAN</job>
    <salary>1250</salary>
</emp><emp id="7654">
    <name>MARTIN</name>
    <job>SALESMAN</job>
    <salary>1250</salary>
</emp>

Create Authentication Scheme From Scretch

Hi there,
I have build an application for users, but the problem i ran in to is that when i try to create a new Create Authentication Scheme,
it doenst let me create one from scratch.
only two options avaliable are :
- Based on a pre-configured scheme from the gallery
- As a copy of an existing authentication scheme
Can some one maby explain me why i dont have the option to create a scheme from scratch, and what will i need to do to get the option.
Yours Sincerly,
Sebastian!

The scenario is as follow,
I'm working on a project as for my finals, and the they asked us to make a Authetication login for users.
I can make groups and users in Apex. I've put some users in a group called: 'Developers'. I want users that are in 'Developers' to be blocked
from certain pages in the application (they may not access all the pages, only certain pages).
So i have read the book Pro Oracle Application Express 4 AUTHENTICATION AND USER MANAGEMENT
and the book says you need to start wich an authentication for users.
I tried it with several tutorials and still it doesnt work. I'm not that good in programming, I do understand what they are saying but finding everything in apex.oracle is just such a work.
I did the following.
Creating the my_users
apexdemo@10gR2> create table my_users(
username varchar2(8),
password varchar2(8)
insert into user_repository values
('john', '1234');
This was to create a table and add a user into it.
Next i created a custom Authentication Scheme and added the following code
create or replace package pkg_auth as
function authenticate(p_username in varchar2,
p_password in varchar2) return boolean;
end;
create or replace package body pkg_auth as
function authenticate(p_username in varchar2,
p_password in varchar2) return boolean is
-- default the result to 0
v_result integer := 0;
begin
-- store 1 in v_result if a matching row
-- can be found
select 1
into v_result
from user_repository
where username = lower(p_username)
and password = p_password;
-- return true if a matching record was found
return(v_result = 1);
exception
-- if no record was found then return false
when no_data_found then
return false;
end authenticate;
end;
I tried the code with
declare
bres boolean := false;
begin
-- use the correct username and password
bres := pkg_auth.authenticate('john', '1234');
if (bres = true) then
dbms_output.put_line('Authentication was successful');
else
dbms_output.put_line('Authentication failed');
end if;
end;
and it returned : Authentication was successful
But when i try to login with the user him self i says login credentials invalid
I dont know what i;m doing wrong or what i'm forgetting here to make it work.

Creating XML file from Java Bean

Hi
Are there any standard methods in Java 1.5 to create XML file from java bean,
i can use JAXB or castor to do so,
But i would like to know if there is any thing in java core classes,
I have seen XMLEncoder, but this is not what i want.
Any ideas
Ashish

Marshall JavaBean to an XML document with JAXB or XMLBeans.

How to create xml file from Oracle and sending the same xml file to an url

How to create xml file from Oracle and sending the same xml file to an url

SQL/XML (XMLElement, XMLForest, XMLAgg, etc) and UTL_HTTP.
Whether that works for you with the version of Oracle you have, your requirements, and needs is another story. A little detail goes a long way.

Ora-20001 when creating a form on table with report (bug?)

Having some trouble creating a "Form on table with report".
1) I pick my table
2) take most of the defaults on the page where you pick the report type (interactive) and the page number (I changed it to 950). next->
3) Do not use tabs. Next->
4) Select all columns for the report. THEN (here's the problem) set an optional where clause of system_role_name like 'ODPSPOPUP%'. Next->
5) choose standard edit link. next->
6) Specify a page of 951 for the form (leave others defaults). next->
7) Set the form primary key (defined in table). next->
8) use existing trigger. next->
9) choose all columns for the form. next->
10) Leave actions to insert, update, delete. next->
11) Get to the summary page and click Finish
Then I get an error page saying:
ORA-20001: Unable to create query and update page. ORA-20001: Unable to create query and update page. ORA-00933: SQL command not properly ended
If I go back to step 4 and erase my where clause the wizard completes successfully.
Also if I change the report type in step 2 from the default of "Interactive" to "Classic" the wizard completes successfully. However upon running the report I get a query parse error. Looks like the where clause in the report sql is: system_role_name like ''ODPSPOPUP%'' (two single quotes on each side).
It looks as if you cannot specify a where clause with a quoted string. The wizard is expecting a bind variable.
Workaround(s):
1) Don't specify a where clause when report type = Interactive in "create form on table with report" wizard.
or
2) Specify a bogus where clause using bind variable syntax such as "system_role_name like :BOGUSVARIABLE". Then edit the report query once the wizard finishes and change the where clause to the constant string you wanted to use in the wizard (e.g. "system_role_name like 'MYSYSTEM%'")
Apex: 3.2.0.00.27
Database: Oracle Database 11g Enterprise Edition 11.1.0.7.0 64bit Production (Oracle EL5)

Andy,
It's a bug, all right. Thanks for the detailed problem description. We'll fix it when we can.
Scott

XML Column from table extract to Pipe Delimited Text File

Hi,
I have an XML column with large data in a Table ( Source SQL server Database).
I was asked to extract XML column to .txt file using SSIS.
Is it possible to extract xml column with huge data to text file ?
when I tried, select XML column from Table in source , I noticed that Property of column is taken as [DT_NTEXT] . I Converted it to DT_TEXT as Ansi donot support DT_NTEXT.
Execution method was success but it failed due to trucation. so wondering is there a way to get XML column extracted to Pipe delimited text file?
Is it advisable to do this ? or IS It Valid to export XML in Pipe Delimited File ?
Please Kindly advice
thanks
kodi

Are you looking at shredding data within XML nodes and then importing it to text file or are you looking at exporting XML value as is? Also is SSIS a necessity?
If not, You can simply use T-SQL for this along with bcp for this. just use a query like
EXEC xp_cmdshell 'bcp "SELECT CAST(XMLColumn AS varchar(max)) AS Column FROM table" queryout <full file path> -c -S <ServerName> -T -t |'
provided you use trusted connection (windows authentication)
see
http://visakhm.blogspot.in/2013/10/bcp-out-custom-format-data-to-flat-file.html
If you want to shred the data use Xpath functions in the query as below
http://visakhm.blogspot.in/2012/10/shred-data-as-well-as-metadata-from-xml.html
Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs

Creating XML Schema from tables With Constraints

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