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MySQL 5.1: Item_xml_str_func Class Reference

Item_xml_str_func Class Reference

#include <item_xmlfunc.h>

Inheritance diagram for Item_xml_str_func:

[legend]Collaboration diagram for Item_xml_str_func:

[legend]List of all members.


Public Member Functions
	Item_xml_str_func (Item a, Item b)
	Item_xml_str_func (Item a, Item b, Item *c)
void	fix_length_and_dec ()
String *	parse_xml (String raw_xml, String parsed_xml_buf)
Protected Attributes
String	tmp_value
String	pxml
Item *	nodeset_func

Detailed Description

Definition at line 26 of file item_xmlfunc.h.

Constructor & Destructor Documentation

Item_xml_str_func::Item_xml_str_func	(	Item *	a,
		Item *	b
	)			`[inline]`

Definition at line 32 of file item_xmlfunc.h.

00032 : Item_str_func(a,b) {}

Item_xml_str_func::Item_xml_str_func	(	Item *	a,
		Item *	b,
		Item *	c
	)			`[inline]`

Definition at line 33 of file item_xmlfunc.h.

00033 : Item_str_func(a,b,c) {}

Member Function Documentation

void Item_xml_str_func::fix_length_and_dec ( ) [virtual]

Implements Item_result_field.

Definition at line 2392 of file item_xmlfunc.cc.

References Item_func::agg_arg_charsets(), Item_func::arg_count, Item_func::args, my_xpath_lex_st::beg, DTCollation::collation, Item::collation, Item_func::const_item(), my_xpath_st::cs, charset_info_st::csname, current_thd, my_xpath_st::debug, my_xpath_lex_st::end, ER_UNKNOWN_ERROR, Item::fix_fields(), my_xpath_st::item, my_xpath_st::lasttok, String::length(), MAX_BLOB_WIDTH, Item::max_length, charset_info_st::mbminlen, MY_COLL_CMP_CONV, my_printf_error(), my_xpath_init(), my_xpath_parse(), MYF, nodeset_func, String::ptr(), pxml, my_xpath_st::pxml, my_xpath_st::query, String::set_charset(), set_if_bigger, strmake(), and Item::val_str().

02393 {
02394   String *xp, tmp;
02395   MY_XPATH xpath;
02396   int rc;
02397 
02398   nodeset_func= 0;
02399 
02400   if (agg_arg_charsets(collation, args, arg_count, MY_COLL_CMP_CONV, 1))
02401     return;
02402 
02403   if (collation.collation->mbminlen > 1)
02404   {
02405     /* UCS2 is not supported */
02406     my_printf_error(ER_UNKNOWN_ERROR,
02407                     "Character set '%s' is not supported by XPATH",
02408                     MYF(0), collation.collation->csname);
02409     return;
02410   }
02411 
02412   if (!args[1]->const_item())
02413   {
02414     my_printf_error(ER_UNKNOWN_ERROR,
02415                     "Only constant XPATH queries are supported", MYF(0));
02416     return;
02417   }
02418 
02419   xp= args[1]->val_str(&tmp);
02420   my_xpath_init(&xpath);
02421   xpath.cs= collation.collation;
02422   xpath.debug= 0;
02423   xpath.pxml= &pxml;
02424   pxml.set_charset(collation.collation);
02425 
02426   rc= my_xpath_parse(&xpath, xp->ptr(), xp->ptr() + xp->length());
02427 
02428   if (!rc)
02429   {
02430     char context[32];
02431     uint clen= xpath.query.end - xpath.lasttok.beg;
02432     set_if_bigger(clen, sizeof(context) - 1);
02433     strmake(context, xpath.lasttok.beg, clen);
02434     my_printf_error(ER_UNKNOWN_ERROR, "XPATH syntax error: '%s'", 
02435                     MYF(0), context);
02436     return;
02437   }
02438 
02439   nodeset_func= xpath.item;
02440   if (nodeset_func)
02441     nodeset_func->fix_fields(current_thd, &nodeset_func);
02442   max_length= MAX_BLOB_WIDTH;
02443 }

Here is the call graph for this function:

String * Item_xml_str_func::parse_xml	(	String *	raw_xml,
		String *	parsed_xml_buf
	)

Definition at line 2582 of file item_xmlfunc.cc.

References buf, current_thd, ER, ER_WRONG_VALUE, String::length(), MY_XML_USER_DATA::level, my_snprintf(), my_xml_error_lineno(), my_xml_error_pos(), my_xml_error_string(), MY_XML_FLAG_RELATIVE_NAMES, MY_XML_FLAG_SKIP_TEXT_NORMALIZATION, MY_XML_NODE_TAG, MY_XML_OK, my_xml_parse(), my_xml_parser_create(), my_xml_parser_free(), my_xml_set_enter_handler(), my_xml_set_leave_handler(), my_xml_set_user_data(), my_xml_set_value_handler(), p, String::ptr(), push_warning_printf(), MY_XML_USER_DATA::pxml, MYSQL_ERROR::WARN_LEVEL_WARN, xml_enter(), xml_leave(), and xml_value().

Referenced by Item_func_xml_update::val_str(), and Item_func_xml_extractvalue::val_str().

02583 {
02584   MY_XML_PARSER p;
02585   MY_XML_USER_DATA user_data;
02586   int rc;
02587 
02588   parsed_xml_buf->length(0);
02589 
02590   /* Prepare XML parser */
02591   my_xml_parser_create(&p);
02592   p.flags= MY_XML_FLAG_RELATIVE_NAMES | MY_XML_FLAG_SKIP_TEXT_NORMALIZATION;
02593   user_data.level= 0;
02594   user_data.pxml= parsed_xml_buf;
02595   my_xml_set_enter_handler(&p, xml_enter);
02596   my_xml_set_value_handler(&p, xml_value);
02597   my_xml_set_leave_handler(&p, xml_leave);
02598   my_xml_set_user_data(&p, (void*) &user_data);
02599 
02600   /* Add root node */
02601   p.current_node_type= MY_XML_NODE_TAG;
02602   xml_enter(&p, raw_xml->ptr(), 0);
02603 
02604   /* Execute XML parser */
02605   if ((rc= my_xml_parse(&p, raw_xml->ptr(), raw_xml->length())) != MY_XML_OK)
02606   {
02607     char buf[128];
02608     my_snprintf(buf, sizeof(buf)-1, "parse error at line %d pos %d: %s",
02609                 my_xml_error_lineno(&p) + 1,
02610                 my_xml_error_pos(&p) + 1,
02611                 my_xml_error_string(&p));
02612     push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
02613                         ER_WRONG_VALUE,
02614                         ER(ER_WRONG_VALUE), "XML", buf);
02615   }
02616   my_xml_parser_free(&p);
02617 
02618   return rc == MY_XML_OK ? parsed_xml_buf : 0;
02619 }