Bug 2701: Function CHARSET() inconsistency

CONVERT3 was removed, it was for test purposes,
and rather harmful.

3 files changed, 4 insertions, 52 deletions

diff --git a/sql/item_strfunc.cc b/sql/item_strfunc.cc
index fd1222d5f1a..ed6e44262c7 100644
--- a/sql/item_strfunc.cc
+++ b/sql/item_strfunc.cc
@@ -2124,42 +2124,6 @@ void Item_func_conv_charset::print(String *str)
   str->append(')');
 }
 
-String *Item_func_conv_charset3::val_str(String *str)
-{
-  char cs1[30], cs2[30];
-  String to_cs_buff(cs1, sizeof(cs1), default_charset_info);
-  String from_cs_buff(cs2, sizeof(cs2), default_charset_info);
-  String *arg= args[0]->val_str(str);
-  String *to_cs= args[1]->val_str(&to_cs_buff);
-  String *from_cs= args[2]->val_str(&from_cs_buff);
-  CHARSET_INFO *from_charset;
-  CHARSET_INFO *to_charset;
-
-  if (!arg     || args[0]->null_value ||
-      !to_cs   || args[1]->null_value ||
-      !from_cs || args[2]->null_value ||
-      !(from_charset=get_charset_by_name(from_cs->ptr(), MYF(MY_WME))) ||
-      !(to_charset=get_charset_by_name(to_cs->ptr(), MYF(MY_WME))))
-  {
-    null_value= 1;
-    return 0;
-  }
-
-  if (str_value.copy(arg->ptr(), arg->length(), from_charset, to_charset))
-  {
-    null_value= 1;
-    return 0;
-  }
-  null_value= 0;
-  return &str_value;
-}
-
-
-void Item_func_conv_charset3::fix_length_and_dec()
-{
-  max_length = args[0]->max_length;
-}
-
 String *Item_func_set_collation::val_str(String *str)
 {
   str=args[0]->val_str(str);
@@ -2226,7 +2190,7 @@ String *Item_func_charset::val_str(String *str)
   if ((null_value=(args[0]->null_value || !res->charset())))
     return 0;
   str->copy(res->charset()->csname,strlen(res->charset()->csname),
-	    &my_charset_latin1, default_charset());
+	    &my_charset_latin1, collation.collation);
   return str;
 }
 
@@ -2237,7 +2201,7 @@ String *Item_func_collation::val_str(String *str)
   if ((null_value=(args[0]->null_value || !res->charset())))
     return 0;
   str->copy(res->charset()->name,strlen(res->charset()->name),
-	    &my_charset_latin1, default_charset());
+	    &my_charset_latin1, collation.collation);
   return str;
 }
 
diff --git a/sql/item_strfunc.h b/sql/item_strfunc.h
index 465300e721e..4832ddbd1b1 100644
--- a/sql/item_strfunc.h
+++ b/sql/item_strfunc.h
@@ -619,16 +619,6 @@ public:
   void print(String *str) { print_op(str); }
 };
 
-class Item_func_conv_charset3 :public Item_str_func
-{
-public:
-  Item_func_conv_charset3(Item *arg1,Item *arg2,Item *arg3)
-    :Item_str_func(arg1,arg2,arg3) {}
-  String *val_str(String *);
-  void fix_length_and_dec();
-  const char *func_name() const { return "convert"; }
-};
-
 class Item_func_charset :public Item_str_func
 {
 public:
@@ -637,8 +627,8 @@ public:
   const char *func_name() const { return "charset"; }
   void fix_length_and_dec() 
   {
-     max_length=40; // should be enough
      collation.set(system_charset_info);
+     max_length= 64 * collation.collation->mbmaxlen; // should be enough
   };
 };
 
@@ -650,8 +640,8 @@ public:
   const char *func_name() const { return "collation"; }
   void fix_length_and_dec()
   {
-     max_length=40; // should be enough
      collation.set(system_charset_info);
+     max_length= 64 * collation.collation->mbmaxlen; // should be enough
   };
 };
 
diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy
index 0dbe8981466..bdeaf5a0b86 100644
--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -2574,8 +2574,6 @@ simple_expr:
 	  }
 	| CONVERT_SYM '(' expr USING charset_name ')'
 	  { $$= new Item_func_conv_charset($3,$5); }
-	| CONVERT_SYM '(' expr ',' expr ',' expr ')'
-	  { $$= new Item_func_conv_charset3($3,$7,$5); }
 	| DEFAULT '(' simple_ident ')'
 	  { $$= new Item_default_value($3); }
 	| VALUES '(' simple_ident ')'