Movatterモバイル変換

[0]ホーム
URL:

Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly

 Sign up
Appearance settings

Commitc9cab10

Browse files
committed
Remove munging of xml and xpath params to xpath(). The XML must now be a well formed XML document.
1 parent1079564 commitc9cab10

File tree

2 files changed

+17
-39
lines changed

2 files changed

+17
-39
lines changed

‎doc/src/sgml/func.sgml‎

Lines changed: 6 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.472 2009/02/07 14:16:45 momjian Exp $ -->
1+
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.473 2009/03/23 21:00:38 adunstan Exp $ -->
22

33
<chapter id="functions">
44
<title>Functions and Operators</title>
@@ -8447,6 +8447,11 @@ SELECT xmlagg(x) FROM (SELECT * FROM test ORDER BY y DESC) AS tab;
84478447
corresponding to the node set produced by the XPath expression.
84488448
</para>
84498449

8450+
<para>
8451+
The second argument must be a well formed XML document. In particular,
8452+
it must have a single root node element.
8453+
</para>
8454+
84508455
<para>
84518456
The third argument of the function is an array of namespace
84528457
mappings. This array should be a two-dimensional array with the

‎src/backend/utils/adt/xml.c‎

Lines changed: 11 additions & 38 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $PostgreSQL: pgsql/src/backend/utils/adt/xml.c,v 1.83 2009/01/07 13:44:37 tgl Exp $
10+
* $PostgreSQL: pgsql/src/backend/utils/adt/xml.c,v 1.84 2009/03/23 21:00:39 adunstan Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -3182,8 +3182,9 @@ xml_xmlnodetoxmltype(xmlNodePtr cur)
31823182
* to be the most useful one (array of XML functions plays a role of
31833183
* some kind of substitution for XQuery sequences).
31843184
*
3185-
* Workaround here: we parse XML data in different way to allow XPath for
3186-
* fragments (see "XPath for fragment" TODO comment inside).
3185+
* It is up to the user to ensure that the XML passed is in fact
3186+
* an XML document - XPath doesn't work easily on fragments without
3187+
* a context node being known.
31873188
*/
31883189
Datum
31893190
xpath(PG_FUNCTION_ARGS)
@@ -3258,41 +3259,13 @@ xpath(PG_FUNCTION_ARGS)
32583259

32593260
xml_init();
32603261

3261-
/*
3262-
* To handle both documents and fragments, regardless of the fact whether
3263-
* the XML datum has a single root (XML well-formedness), we wrap the XML
3264-
* datum in a dummy element (<x>...</x>) and extend the XPath expression
3265-
* accordingly. To do it, throw away the XML prolog, if any.
3266-
*/
3267-
if (len >=5&&
3268-
xmlStrncmp((xmlChar*)datastr, (xmlChar*)"<?xml",5)==0)
3269-
{
3270-
i=5;
3271-
while (i<len&&
3272-
!(datastr[i-1]=='?'&&datastr[i]=='>'))
3273-
i++;
3274-
3275-
if (i==len)
3276-
xml_ereport(ERROR,ERRCODE_INTERNAL_ERROR,
3277-
"could not parse XML data");
3278-
3279-
++i;
3280-
3281-
datastr+=i;
3282-
len-=i;
3283-
}
3284-
3285-
string= (xmlChar*)palloc((len+8)*sizeof(xmlChar));
3286-
memcpy(string,"<x>",3);
3287-
memcpy(string+3,datastr,len);
3288-
memcpy(string+3+len,"</x>",5);
3289-
len+=7;
3262+
string= (xmlChar*)palloc((len+1)*sizeof(xmlChar));
3263+
memcpy(string,datastr,len);
3264+
string[len]='\0';
32903265

3291-
xpath_expr= (xmlChar*)palloc((xpath_len+3)*sizeof(xmlChar));
3292-
memcpy(xpath_expr,"/x",2);
3293-
memcpy(xpath_expr+2,VARDATA(xpath_expr_text),xpath_len);
3294-
xpath_expr[xpath_len+2]='\0';
3295-
xpath_len+=2;
3266+
xpath_expr= (xmlChar*)palloc((xpath_len+1)*sizeof(xmlChar));
3267+
memcpy(xpath_expr,VARDATA(xpath_expr_text),xpath_len);
3268+
xpath_expr[xpath_len]='\0';
32963269

32973270
xmlInitParser();
32983271

@@ -3307,7 +3280,7 @@ xpath(PG_FUNCTION_ARGS)
33073280
doc=xmlCtxtReadMemory(ctxt, (char*)string,len,NULL,NULL,0);
33083281
if (doc==NULL)
33093282
xml_ereport(ERROR,ERRCODE_INVALID_XML_DOCUMENT,
3310-
"could not parse XMLdata");
3283+
"could not parse XMLdocument");
33113284
xpathctx=xmlXPathNewContext(doc);
33123285
if (xpathctx==NULL)
33133286
xml_ereport(ERROR,ERRCODE_OUT_OF_MEMORY,

0 commit comments

Comments
 (0)
[8]ページ先頭
©2009-2025 Movatter.jp