, , , ,

Java properties in Oracle DB

четверг, 28 октября 2010 г. 0 коммент.

Sometimes you need to know Java-machine settings for the proper coding.

To do this, use the function dbms_java.get_ojvm_property.


SQL> set pagesize 1000
SQL>
SQL> with java_properties as
2 (
3 select 'java.version' as property, q'~Java Runtime Environment version~' as description from dual union all
4 select 'java.vendor' as property, q'~Java Runtime Environment vendor~' as description from dual union all
5 select 'java.vendor.url' as property, q'~Java vendor URL~' as description from dual union all
6 select 'java.home' as property, q'~Java installation directory~' as description from dual union all
7 select 'java.vm.specification.version' as property, q'~Java Virtual Machine specification version~' as description from dual union all
8 select 'java.vm.specification.vendor' as property, q'~Java Virtual Machine specification vendor~' as description from dual union all
9 select 'java.vm.specification.name' as property, q'~Java Virtual Machine specification name~' as description from dual union all
10 select 'java.vm.version' as property, q'~Java Virtual Machine implementation version~' as description from dual union all
11 select 'java.vm.vendor' as property, q'~Java Virtual Machine implementation vendor~' as description from dual union all
12 select 'java.vm.name' as property, q'~Java Virtual Machine implementation name~' as description from dual union all
13 select 'java.specification.version' as property, q'~Java Runtime Environment specification version~' as description from dual union all
14 select 'java.specification.vendor' as property, q'~Java Runtime Environment specification vendor~' as description from dual union all
15 select 'java.specification.name' as property, q'~Java Runtime Environment specification name~' as description from dual union all
16 select 'java.class.version' as property, q'~Java class format version number~' as description from dual union all
17 select 'java.class.path' as property, q'~Java class path~' as description from dual union all
18 select 'java.library.path' as property, q'~List of paths to search when loading libraries~' as description from dual union all
19 select 'java.io.tmpdir' as property, q'~Default temp file path~' as description from dual union all
20 select 'java.compiler' as property, q'~Name of JIT compiler to use~' as description from dual union all
21 select 'java.ext.dirs' as property, q'~Path of extension directory or directories~' as description from dual union all
22 select 'os.name' as property, q'~Operating system name~' as description from dual union all
23 select 'os.arch' as property, q'~Operating system architecture~' as description from dual union all
24 select 'os.version' as property, q'~Operating system version~' as description from dual union all
25 select 'file.separator' as property, q'~File separator ("/" on UNIX)~' as description from dual union all
26 select 'path.separator' as property, q'~Path separator (":" on UNIX)~' as description from dual union all
27 select 'line.separator' as property, q'~Line separator ("\n" on UNIX)~' as description from dual union all
28 select 'user.name' as property, q'~User's account name~' as description from dual union all
29 select 'user.home' as property, q'~User's home directory~' as description from dual union all
30 select 'user.dir' as property, q'~User's current working directory~' as description from dual
31 )
32 select dbms_java.get_ojvm_property(java_properties.property) as value, java_properties.property, java_properties.description
33 from java_properties
34 /

VALUE PROPERTY DESCRIPTION
-------------------------------------------------------------------------------- ----------------------------- ----------------------------------------------
1.5.0_10 java.version Java Runtime Environment version
Oracle Corporation java.vendor Java Runtime Environment vendor
http://www.oracle.com/java/ java.vendor.url Java vendor URL
D:\ORACLE\DB112\JAVAVM\ java.home Java installation directory
1.0 java.vm.specification.version Java Virtual Machine specification version
Sun Microsystems Inc. java.vm.specification.vendor Java Virtual Machine specification vendor
Java Virtual Machine Specification java.vm.specification.name Java Virtual Machine specification name
1.5.0_01 java.vm.version Java Virtual Machine implementation version
Oracle Corporation java.vm.vendor Java Virtual Machine implementation vendor
JServer VM java.vm.name Java Virtual Machine implementation name
1.5 java.specification.version Java Runtime Environment specification version
Sun Microsystems Inc. java.specification.vendor Java Runtime Environment specification vendor
Java Platform API Specification java.specification.name Java Runtime Environment specification name
48.0 java.class.version Java class format version number
java.class.path Java class path
d:\oracle\db112\bin;.;C:\WINDOWS\system32;C:\WINDOWS;D:\oracle\db112\bin;C:\WIND java.library.path List of paths to search when loading libraries
C:\WINDOWS\TEMP\ java.io.tmpdir Default temp file path
java.compiler Name of JIT compiler to use
java.ext.dirs Path of extension directory or directories
Windows XP os.name Operating system name
x86 os.arch Operating system architecture
5.1 os.version Operating system version
\ file.separator File separator ("/" on UNIX)
; path.separator Path separator (":" on UNIX)
line.separator Line separator ("\n" on UNIX)
user.name User's account name
user.home User's home directory
D:\ORACLE\DB112 user.dir User's current working directory

28 rows selected

SQL>
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, , ,

Custom XSLT with JAPX library in ORACLE DB

вторник, 26 октября 2010 г. 0 коммент.

Sometimes the built-in transformer is not working very well, so you have to use their own transformer.

Will create its own transformer.


create or replace and compile java source named ora_20000_xmlutility_jaxp as
package ru.ora_20000.xml;

import java.io.IOException;
import java.io.StringWriter;
import java.io.Reader;
import java.io.StringReader;
import java.io.Writer;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import oracle.sql.CLOB;

import org.w3c.dom.Document;

import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

public class xmlutility_jaxp {

private static Document parseDocument(String xmlText) throws Exception
{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
DocumentBuilder builder;
try {
builder = factory.newDocumentBuilder();
return builder.parse(new InputSource(new StringReader(xmlText)));
} catch (ParserConfigurationException e) {
throw new Exception("parseDocument ERROR-ParserConfigurationException: " + e.getMessage());
} catch (IOException e) {
throw new Exception("parseDocument ERROR-IOException: " + e.getMessage());
} catch (SAXException e) {
throw new Exception("parseDocument ERROR-SAXException: " + e.getMessage());
}
}

private static String processXSL(Document xmlDocument, Document xsltDocument) throws Exception
{
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer;
StringWriter strWriter = new StringWriter();
try {
transformer = tFactory.newTransformer(new DOMSource(xsltDocument));
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.transform(new DOMSource(xmlDocument), new StreamResult(strWriter));
return strWriter.getBuffer().toString();
} catch (TransformerConfigurationException e) {
throw new Exception("processXSL ERROR-TransformerConfigurationException: " + e.getMessage());
} catch (TransformerException e) {
throw new Exception("processXSL ERROR-TransformerException: " + e.getMessage());
}
}

public static String getStringFromClob(CLOB clob) throws Exception
{
Reader reader;
StringBuffer stringBuffer;

try
{
reader = clob.getCharacterStream();
stringBuffer = new StringBuffer();

int numchars;
char[] buffer = new char[clob.getChunkSize()];
while ((numchars = reader.read(buffer, 0, clob.getChunkSize())) != -1)
{
stringBuffer.append(buffer, 0, numchars);
}
reader.close();
} catch (SQLException e) {
throw new Exception("getStringFromClob ERROR-SQLException: " + e.getMessage());
} catch (IOException e) {
throw new Exception("getStringFromClob ERROR-IOException: " + e.getMessage());
}
return stringBuffer.toString();
}

public static CLOB getClobFromString(String string) throws Exception
{
CLOB clob = null;
Writer writer = null;
try {
Connection connection = DriverManager.getConnection("jdbc:default:connection:");

clob = CLOB.createTemporary(connection, true, CLOB.DURATION_SESSION);
writer = clob.setCharacterStream(1L);
if (string != null) { writer.write(string); }
writer.flush();
writer.close();
} catch (SQLException e) {
throw new Exception("getClobFromString ERROR-SQLException: " + e.getMessage());
} catch (IOException e) {
throw new Exception("getClobFromString ERROR-IOException: " + e.getMessage());
} finally {
if (writer != null) { writer.close(); }
}
return clob;
}

public static String transformXmlString(String xmlText, String xslText) throws Exception
{
if (xmlText == null || xslText == null)
{
return null;
}

Document xmlDoc = parseDocument(xmlText);
Document xslDoc = parseDocument(xslText);

return processXSL(xmlDoc, xslDoc);
}

public static CLOB transformXmlClob(CLOB xmlClob, CLOB xslClob) throws Exception
{
if (xmlClob == null || xslClob == null)
{
return null;
}

String xmlText = getStringFromClob(xmlClob);
String xslText = getStringFromClob(xslClob);
String xmlResult = transformXmlString(xmlText, xslText);
return getClobFromString(xmlResult);
}

}

Let's create pl\sql wrapper for java methods.



create or replace package ora_20000_xmlutility_jaxp is

function XMLTransformClob( xmlText clob
,xslText clob
) return clob;

function XMLTransform( xmlText varchar2
,xslText varchar2
) return varchar2;


end ora_20000_xmlutility_jaxp;
/
create or replace package body ora_20000_xmlutility_jaxp is

function XMLTransformClob( xmlText clob
,xslText clob
) return clob
is
language java name 'ru.ora_20000.xml.transformXmlClob(oracle.sql.CLOB, oracle.sql.CLOB) return oracle.sql.CLOB';

function XMLTransform( xmlText varchar2
,xslText varchar2
) return varchar2
is
language java name 'ru.ora_20000.xml.transformXmlString(java.lang.String, java.lang.String) return java.lang.String';

end ora_20000_xmlutility_jaxp;
/

Run the sample for testing



SQL>
SQL> -- create xml_sample_table
SQL> create table XML_SAMPLE
2 (
3 XMLTEXT clob not null
4 )
5 ;

Table created

SQL>

SQL>
SQL> -- insert sample xml
SQL> insert into XML_SAMPLE
2 values(q'~<?xml version="1.0"?>
3 <catalog>
4 <book id="bk101">
5 <author>Gambardella, Matthew</author>
6 <title>XML Developer's Guide</title>
7 <genre>Computer</genre>
8 <price>44.95</price>
9 <publish_date>2000-10-01</publish_date>
10 <description>An in-depth look at creating applications
11 with XML.</description>
12 </book>
13 <book id="bk102">
14 <author>Ralls, Kim</author>
15 <title>Midnight Rain</title>
16 <genre>Fantasy</genre>
17 <price>5.95</price>
18 <publish_date>2000-12-16</publish_date>
19 <description>A former architect battles corporate zombies,
20 an evil sorceress, and her own childhood to become queen
21 of the world.</description>
22 </book>
23 <book id="bk103">
24 <author>Corets, Eva</author>
25 <title>Maeve Ascendant</title>
26 <genre>Fantasy</genre>
27 <price>5.95</price>
28 <publish_date>2000-11-17</publish_date>
29 <description>After the collapse of a nanotechnology
30 society in England, the young survivors lay the
31 foundation for a new society.</description>
32 </book>
33 <book id="bk104">
34 <author>Corets, Eva</author>
35 <title>Oberon's Legacy</title>
36 <genre>Fantasy</genre>
37 <price>5.95</price>
38 <publish_date>2001-03-10</publish_date>
39 <description>In post-apocalypse England, the mysterious
40 agent known only as Oberon helps to create a new life
41 for the inhabitants of London. Sequel to Maeve
42 Ascendant.</description>
43 </book>
44 <book id="bk105">
45 <author>Corets, Eva</author>
46 <title>The Sundered Grail</title>
47 <genre>Fantasy</genre>
48 <price>5.95</price>
49 <publish_date>2001-09-10</publish_date>
50 <description>The two daughters of Maeve, half-sisters,
51 battle one another for control of England. Sequel to
52 Oberon's Legacy.</description>
53 </book>
54 <book id="bk106">
55 <author>Randall, Cynthia</author>
56 <title>Lover Birds</title>
57 <genre>Romance</genre>
58 <price>4.95</price>
59 <publish_date>2000-09-02</publish_date>
60 <description>When Carla meets Paul at an ornithology
61 conference, tempers fly as feathers get ruffled.</description>
62 </book>
63 <book id="bk107">
64 <author>Thurman, Paula</author>
65 <title>Splish Splash</title>
66 <genre>Romance</genre>
67 <price>4.95</price>
68 <publish_date>2000-11-02</publish_date>
69 <description>A deep sea diver finds true love twenty
70 thousand leagues beneath the sea.</description>
71 </book>
72 <book id="bk108">
73 <author>Knorr, Stefan</author>
74 <title>Creepy Crawlies</title>
75 <genre>Horror</genre>
76 <price>4.95</price>
77 <publish_date>2000-12-06</publish_date>
78 <description>An anthology of horror stories about roaches,
79 centipedes, scorpions and other insects.</description>
80 </book>
81 <book id="bk109">
82 <author>Kress, Peter</author>
83 <title>Paradox Lost</title>
84 <genre>Science Fiction</genre>
85 <price>6.95</price>
86 <publish_date>2000-11-02</publish_date>
87 <description>After an inadvertant trip through a Heisenberg
88 Uncertainty Device, James Salway discovers the problems
89 of being quantum.</description>
90 </book>
91 <book id="bk110">
92 <author>O'Brien, Tim</author>
93 <title>Microsoft .NET: The Programming Bible</title>
94 <genre>Computer</genre>
95 <price>36.95</price>
96 <publish_date>2000-12-09</publish_date>
97 <description>Microsoft's .NET initiative is explored in
98 detail in this deep programmer's reference.</description>
99 </book>
100 <book id="bk111">
101 <author>O'Brien, Tim</author>
102 <title>MSXML3: A Comprehensive Guide</title>
103 <genre>Computer</genre>
104 <price>36.95</price>
105 <publish_date>2000-12-01</publish_date>
106 <description>The Microsoft MSXML3 parser is covered in
107 detail, with attention to XML DOM interfaces, XSLT processing,
108 SAX and more.</description>
109 </book>
110 <book id="bk112">
111 <author>Galos, Mike</author>
112 <title>Visual Studio 7: A Comprehensive Guide</title>
113 <genre>Computer</genre>
114 <price>49.95</price>
115 <publish_date>2001-04-16</publish_date>
116 <description>Microsoft Visual Studio 7 is explored in depth,
117 looking at how Visual Basic, Visual C++, C#, and ASP+ are
118 integrated into a comprehensive development
119 environment.</description>
120 </book>
121 </catalog>
122 ~')
123
124 /

1 row inserted

SQL>

Xml example is taken from here "Sample XML File (books.xml)".


Simple xlst creates html.



select ora_20000_xmlutility_jaxp.xmltransformclob
(xml_sample.xmltext,
q'~<?xml version="1.0" encoding="Windows-1251"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:sdt="http://localhost/schemas/data" version="1.0">
<xsl:output method="html"/>
<xsl:template match="/">
<html>
<head>
<title>Books</title>
</head>
<body>
<table border='1'>
<tr><th>title</th><th>author</th></tr>
<xsl:for-each select="/catalog/book">
<tr>
<td><xsl:value-of select="title"/></td>
<td><xsl:value-of select="author"/></td>
</tr>
</xsl:for-each>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>~'
)
from xml_sample

And the result



<html xmlns:sdt="http://localhost/schemas/data">
<head>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Books</title>
</head>
<body>
<table border="1">
<tr>
<th>title</th><th>author</th>
</tr>
<tr>
<td>XML Developer's Guide</td><td>Gambardella, Matthew</td>
</tr>
<tr>
<td>Midnight Rain</td><td>Ralls, Kim</td>
</tr>
<tr>
<td>Maeve Ascendant</td><td>Corets, Eva</td>
</tr>
<tr>
<td>Oberon's Legacy</td><td>Corets, Eva</td>
</tr>
<tr>
<td>The Sundered Grail</td><td>Corets, Eva</td>
</tr>
<tr>
<td>Lover Birds</td><td>Randall, Cynthia</td>
</tr>
<tr>
<td>Splish Splash</td><td>Thurman, Paula</td>
</tr>
<tr>
<td>Creepy Crawlies</td><td>Knorr, Stefan</td>
</tr>
<tr>
<td>Paradox Lost</td><td>Kress, Peter</td>
</tr>
<tr>
<td>Microsoft .NET: The Programming Bible</td><td>O'Brien, Tim</td>
</tr>
<tr>
<td>MSXML3: A Comprehensive Guide</td><td>O'Brien, Tim</td>
</tr>
<tr>
<td>Visual Studio 7: A Comprehensive Guide</td><td>Galos, Mike</td>
</tr>
</table>
</body>
</html>
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, ,

How to add, change and remove namespace in xml in ORACLE DB

вторник, 12 октября 2010 г. 0 коммент.

Add namespace, method 1:


select insertchildxml(xmltype('<a id="a1"><b id="b1">bbb_value<!-- dummy --></b></a>'),
'/a',
'@xmlns',
'http://www.my.com/scheme')
from dual;

Result:


<a id="a1" xmlns="http://www.my.com/scheme"><b id="b1">bbb_value<!-- dummy --></b></a>

Add namespace, method 2:


select xmltransform(
xmltype('<a id="a1"><b id="b1">bbb_value<!-- dummy --></b></a>'),
xmltype(
'<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns="http://www.my.com/scheme">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="*">
<xsl:element name="{local-name()}">
<xsl:apply-templates select="node()|@*" />
</xsl:element>
</xsl:template>
<xsl:template match="@*">
<xsl:attribute name="{local-name()}"><xsl:value-of select="."/></xsl:attribute>
</xsl:template>
<xsl:template match="processing-instruction()|comment()">
<xsl:copy>
<xsl:apply-templates select="node()"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
')
).getclobval()
from dual;

Result:


<?xml version="1.0" encoding="utf-8"?>
<a xmlns="http://www.my.com/scheme" id="a1">
<b id="b1">bbb_value<!-- dummy --></b>
</a>

Update namespace:


select xmltransform(
xmltype('<a xmlns="http://www.my.com/scheme_old" id="a1"><b id="b1">bbb_value<!-- dummy --></b></a>'),
xmltype(
'<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns="http://www.my.com/scheme">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="*">
<xsl:element name="{local-name()}">
<xsl:apply-templates select="node()|@*" />
</xsl:element>
</xsl:template>
<xsl:template match="@*">
<xsl:attribute name="{local-name()}"><xsl:value-of select="."/></xsl:attribute>
</xsl:template>
<xsl:template match="processing-instruction()|comment()">
<xsl:copy>
<xsl:apply-templates select="node()"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
')
)
from dual;

Result:


<?xml version="1.0" encoding="utf-8"?>
<a xmlns="http://www.my.com/scheme" id="a1">
<b id="b1">bbb_value<!-- dummy --></b>
</a>

Delete namespace:


select xmltransform(
xmltype('<a xmlns="http://www.my.com/scheme_old" id="a1"><b id="b1">bbb_value<!-- dummy --></b></a>'),
xmltype(
'<?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" indent="yes"/>
<xsl:template match="*">
<xsl:element name="{local-name()}">
<xsl:apply-templates select="node()|@*" />
</xsl:element>
</xsl:template>
<xsl:template match="@*">
<xsl:attribute name="{local-name()}"><xsl:value-of select="."/></xsl:attribute>
</xsl:template>
<xsl:template match="processing-instruction()|comment()">
<xsl:copy>
<xsl:apply-templates select="node()"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
')
)
from dual;

Result:


<?xml version="1.0" encoding="utf-8"?>
<a id="a1">
<b id="b1">bbb_value<!-- dummy --></b>
</a>
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,

q{Oracle's quote operator}

вторник, 5 октября 2010 г. 0 коммент.

Oracle 10g introduced a new mechanism to write in quotes. In previous versions it was necessary to use double quotes. You can now use the syntax q'quote_delimiter ... quote_delimiter'.see more...


SQL> set serveroutput on
SQL>
SQL> declare
2 vs varchar2(100);
3 vcur sys_refcursor;
4
5 vSQL varchar2(2000) :=
6 q'@
7 select 'MARY' as nm from dual union all
8 select q'BBEN'S BOOKB' as nm from dual union all
9 select q'XMARK'S CATX' as nm from dual union all
10 select q'[TED'S DOG]' as nm from dual
11 @';
12 begin
13
14 open vcur for vSQL;
15
16 dbms_output.put_line(vSQL);
17 loop
18 fetch vcur into vs;
19 exit when vcur%notfound;
20 dbms_output.put_line(vs);
21 end loop;
22 close vcur;
23 end;
24 /


select 'MARY' as nm from dual union all
select q'BBEN'S BOOKB' as nm from dual union all
select q'XMARK'S CATX' as nm from dual union all
select q'[TED'S DOG]' as nm from dual

MARY
BEN'S BOOK
MARK'S CAT
TED'S DOG

PL/SQL procedure successfully completed
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