An unescaped ampersand still causes LPX-00242 in xmltype.transform

Running Oracle Database 11 g Enterprise Edition Release 11.1.0.7.0 - 64 bit Production

Collect web form and recovery through SQLX functions then transformed into html and plain text documents. If the '&' entered... functions SQLX is not immune to "& amp;"... but the LPX-00242 error is always triggered when sending to xmltype.transform.

A simple test case:
set define off;
declare
l_xsl xmltype;
l_xml xmltype;
begin

l_xsl := xmltype('<?xml version="1.0"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text"/>

<xsl:template match="/">

Hello <xsl:value-of select="//name"/>

</xsl:template>
</xsl:stylesheet>');

l_xml := xmltype('<test><name>Jane&amp;John Doe</name></test>');

dbms_output.put_line(l_xml.transform
                                    (l_xsl
                                    ).getclobval ());
end;
the code above throws this exception:
ORA-31011: XML parsing failed
ORA-19202: Error occurred in XML processing
LPX-00241: entity reference is not well formed
Error at line 3
ORA-06512: at "SYS.XMLTYPE", line 138
ORA-06512: at line 20
If I restart the block above... but change the string xml < test > < name > Jane & amp; amp; John Doe < / name > < / test >

Now, I get the following exception:
Error at line 2
ORA-31011: XML parsing failed
ORA-19202: Error occurred in XML processing
LPX-00242: invalid use of ampersand ('&') character (use &amp;)
Error at line 3
ORA-06512: at "SYS.XMLTYPE", line 138
ORA-06512: at line 20
If I change the xml < test > < name > string Jane & amp; amp; amp; John Doe < / name > < / test >... no exception and displays the following text:

Hello Jane & amp; amp; John Doe

any reason why the SQLX function escape is not enough and I need to double-escape it? The working version ideal, since I now have to decode the reference entity to him is not character, otherwise the code entity reference appears in the content.

Published by: pl_sequel on 7 Sep 2011 14:12

[4] all that requires the double escapement in a part of the xml, but not the other is suspect.

Okay, but see my example again (tested in 11.2.0.1), no double-escaping used, and the output is correct.

The tip of the double escapement is just what OP found as a workaround for his code, but then it is equivalent to the method = "xml" in the first place (as you showed some post after).

Tags: Oracle Development

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