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Bug#18170: XML: ExtractValue(): XPath expression can't use QNames (colon in names)

Browse source 
Problem source:
Qualified names (aka QName) didn't work as tag names and attribute names,
because the parser lacked a real rule to scan QName, so it understood
only non-qualified names without prefixes.

Solution:
New rule was added to check both "ident" and "ident:ident" sequences.
This commit is contained in:
bar@mysql.com 2006-04-17 11:49:20 +05:00
parent 6f5999e9b5
commit faee72a936
3 changed files with 42 additions and 1 deletions
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9
mysql-test/r/xml.result
View file

@ -641,3 +641,12 @@ CALL p2();
EXTRACTVALUE(p,'/Ñ/r') EXTRACTVALUE(p,'/Ñ/r')
A A
DROP PROCEDURE p2; DROP PROCEDURE p2;
select extractValue('<ns:element xmlns:ns="myns"/>','count(ns:element)');
extractValue('<ns:element xmlns:ns="myns"/>','count(ns:element)')
1
select extractValue('<ns:element xmlns:ns="myns">a</ns:element>','/ns:element');
extractValue('<ns:element xmlns:ns="myns">a</ns:element>','/ns:element')
a
select extractValue('<ns:element xmlns:ns="myns">a</ns:element>','/ns:element/@xmlns:ns');
extractValue('<ns:element xmlns:ns="myns">a</ns:element>','/ns:element/@xmlns:ns')
myns

8
mysql-test/t/xml.test
View file

@ -321,3 +321,11 @@ END//
DELIMITER ;// DELIMITER ;//
CALL p2(); CALL p2();
DROP PROCEDURE p2; DROP PROCEDURE p2;
#
# Bug#18170: XML: ExtractValue():
# XPath expression can't use QNames (colon in names)
#
select extractValue('<ns:element xmlns:ns="myns"/>','count(ns:element)');
select extractValue('<ns:element xmlns:ns="myns">a</ns:element>','/ns:element');
select extractValue('<ns:element xmlns:ns="myns">a</ns:element>','/ns:element/@xmlns:ns');

26
sql/item_xmlfunc.cc
View file

@ -2266,6 +2266,30 @@ static int my_xpath_parse_Number(MY_XPATH *xpath)
} }
/*
QName grammar can be found in a separate document
http://www.w3.org/TR/REC-xml-names/#NT-QName
[6] QName ::= (Prefix ':')? LocalPart
[7] Prefix ::= NCName
[8] LocalPart ::= NCName
*/
static int
my_xpath_parse_QName(MY_XPATH *xpath)
{
const char *beg;
if (!my_xpath_parse_term(xpath, MY_XPATH_LEX_IDENT))
return 0;
beg= xpath->prevtok.beg;
if (!my_xpath_parse_term(xpath, MY_XPATH_LEX_COLON))
return 1; /* Non qualified name */
if (!my_xpath_parse_term(xpath, MY_XPATH_LEX_IDENT))
return 0;
xpath->prevtok.beg= beg;
return 1;
}
/* /*
Scan Variable reference Scan Variable reference
@ -2299,7 +2323,7 @@ my_xpath_parse_VariableReference(MY_XPATH *xpath)
static int static int
my_xpath_parse_NodeTest_QName(MY_XPATH *xpath) my_xpath_parse_NodeTest_QName(MY_XPATH *xpath)
{ {
if (!my_xpath_parse_term(xpath, MY_XPATH_LEX_IDENT)) if (!my_xpath_parse_QName(xpath))
return 0; return 0;
DBUG_ASSERT(xpath->context); DBUG_ASSERT(xpath->context);
uint len= xpath->prevtok.end - xpath->prevtok.beg; uint len= xpath->prevtok.end - xpath->prevtok.beg;