Bug#54668 User variable assignments get wrong type

Problem: Item_str_ascii_func::val_str() did not set
charset of the returned value properly.
  
  mysql-test/include/ctype_numconv.inc
  mysql-test/r/ctype_binary.result
  mysql-test/r/ctype_cp1251.result
  mysql-test/r/ctype_latin1.result
  mysql-test/r/ctype_ucs.result
  - Adding tests
  
  sql/item_strfunc.cc
  - Adding initialization of charset

1 files changed, 6 insertions, 1 deletions

diff --git a/sql/item_strfunc.cc b/sql/item_strfunc.cc
index 2a9eef2298d..851d0e07a7e 100644
--- a/sql/item_strfunc.cc
+++ b/sql/item_strfunc.cc
@@ -72,7 +72,12 @@ String *Item_str_ascii_func::val_str(String *str)
   DBUG_ASSERT(fixed == 1);
 
   if (!(collation.collation->state & MY_CS_NONASCII))
-    return val_str_ascii(str);
+  {
+    String *res= val_str_ascii(str);
+    if (res)
+      res->set_charset(collation.collation);
+    return res;
+  }
   
   DBUG_ASSERT(str != &ascii_buf);