Merge branch 'github/10.1' into 10.2

1 files changed, 8 insertions, 2 deletions

diff --git a/sql/item_xmlfunc.cc b/sql/item_xmlfunc.cc
index 57b1807d78c..af62a94afd0 100644
--- a/sql/item_xmlfunc.cc
+++ b/sql/item_xmlfunc.cc
@@ -2718,7 +2718,7 @@ void Item_xml_str_func::fix_length_and_dec()
 
 bool Item_xml_str_func::fix_fields(THD *thd, Item **ref)
 {
-  String *xp, tmp;
+  String *xp;
   MY_XPATH xpath;
   int rc;
 
@@ -2746,7 +2746,13 @@ bool Item_xml_str_func::fix_fields(THD *thd, Item **ref)
     return true;
   }
 
-  if (!(xp= args[1]->val_str(&tmp)))
+  /*
+    Get the XPath query text from args[1] and cache it in m_xpath_query.
+    Its fragments will be referenced by items created during my_xpath_parse(),
+    e.g. by Item_nodeset_func_axisbyname::node_name.
+  */
+  if (!(xp= args[1]->val_str(&m_xpath_query)) ||
+      (xp != &m_xpath_query && m_xpath_query.copy(*xp)))
     return false; // Will return NULL
   my_xpath_init(&xpath);
   xpath.thd= thd;