diff --git a/mysql-test/r/func_str.result b/mysql-test/r/func_str.result
index ffb7f2cd911..302d9d7374b 100644
--- a/mysql-test/r/func_str.result
+++ b/mysql-test/r/func_str.result
@@ -249,6 +249,24 @@ INSERT INTO t1 VALUES (1, 'a545f661efdd1fb66fdee3aab79945bf');
 SELECT 1 FROM t1 WHERE tmp=AES_DECRYPT(tmp,"password");
 1
 DROP TABLE t1;
+select collation(bin(130)), coercibility(bin(130));
+collation(bin(130))	coercibility(bin(130))
+latin1_swedish_ci	3
+select collation(oct(130)), coercibility(oct(130));
+collation(oct(130))	coercibility(oct(130))
+latin1_swedish_ci	3
+select collation(conv(130,16,10)), coercibility(conv(130,16,10));
+collation(conv(130,16,10))	coercibility(conv(130,16,10))
+latin1_swedish_ci	3
+select collation(hex(130)), coercibility(hex(130));
+collation(hex(130))	coercibility(hex(130))
+latin1_swedish_ci	3
+select collation(char(130)), coercibility(hex(130));
+collation(char(130))	coercibility(hex(130))
+binary	3
+select collation(format(130,10)), coercibility(format(130,10));
+collation(format(130,10))	coercibility(format(130,10))
+latin1_swedish_ci	3
 select collation(lcase(_latin2'a')), coercibility(lcase(_latin2'a'));
 collation(lcase(_latin2'a'))	coercibility(lcase(_latin2'a'))
 latin2_general_ci	3
@@ -306,8 +324,17 @@ latin2_general_ci	3
 select collation(insert(_latin2'abcd',2,3,_latin2'ef')), coercibility(insert(_latin2'abcd',2,3,_latin2'ef'));
 collation(insert(_latin2'abcd',2,3,_latin2'ef'))	coercibility(insert(_latin2'abcd',2,3,_latin2'ef'))
 latin2_general_ci	3
+select collation(replace(_latin2'abcd',_latin2'b',_latin2'B')), coercibility(replace(_latin2'abcd',_latin2'b',_latin2'B'));
+collation(replace(_latin2'abcd',_latin2'b',_latin2'B'))	coercibility(replace(_latin2'abcd',_latin2'b',_latin2'B'))
+latin2_general_ci	3
 create table t1 
 select
+bin(130),
+oct(130),
+conv(130,16,10),
+hex(130),
+char(130),
+format(130,10),
 left(_latin2'a',1),
 right(_latin2'a',1), 
 lcase(_latin2'a'), 
@@ -326,11 +353,20 @@ reverse(_latin2'ab'),
 quote(_latin2'ab'),
 soundex(_latin2'ab'),
 substring(_latin2'ab',1),
-insert(_latin2'abcd',2,3,_latin2'ef')
+insert(_latin2'abcd',2,3,_latin2'ef'),
+replace(_latin2'abcd',_latin2'b',_latin2'B')
 ;
+Warnings:
+Warning	1263	Data truncated for column 'format(130,10)' at row 1
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
+  `bin(130)` char(64) NOT NULL default '',
+  `oct(130)` char(64) NOT NULL default '',
+  `conv(130,16,10)` char(64) NOT NULL default '',
+  `hex(130)` char(6) NOT NULL default '',
+  `char(130)` char(1) NOT NULL default '',
+  `format(130,10)` char(4) NOT NULL default '',
   `left(_latin2'a',1)` char(1) character set latin2 NOT NULL default '',
   `right(_latin2'a',1)` char(1) character set latin2 NOT NULL default '',
   `lcase(_latin2'a')` char(1) character set latin2 NOT NULL default '',
@@ -349,6 +385,7 @@ t1	CREATE TABLE `t1` (
   `quote(_latin2'ab')` char(6) character set latin2 NOT NULL default '',
   `soundex(_latin2'ab')` char(4) character set latin2 NOT NULL default '',
   `substring(_latin2'ab',1)` char(2) character set latin2 NOT NULL default '',
-  `insert(_latin2'abcd',2,3,_latin2'ef')` char(6) character set latin2 NOT NULL default ''
+  `insert(_latin2'abcd',2,3,_latin2'ef')` char(6) character set latin2 NOT NULL default '',
+  `replace(_latin2'abcd',_latin2'b',_latin2'B')` char(4) character set latin2 NOT NULL default ''
 ) TYPE=MyISAM CHARSET=latin1
 drop table t1;
diff --git a/mysql-test/t/func_str.test b/mysql-test/t/func_str.test
index 93e35efa455..1d33d196bdd 100644
--- a/mysql-test/t/func_str.test
+++ b/mysql-test/t/func_str.test
@@ -136,6 +136,12 @@ DROP TABLE t1;
 #
 # Test collation and coercibility
 #
+select collation(bin(130)), coercibility(bin(130));
+select collation(oct(130)), coercibility(oct(130));
+select collation(conv(130,16,10)), coercibility(conv(130,16,10));
+select collation(hex(130)), coercibility(hex(130));
+select collation(char(130)), coercibility(hex(130));
+select collation(format(130,10)), coercibility(format(130,10));
 select collation(lcase(_latin2'a')), coercibility(lcase(_latin2'a'));
 select collation(ucase(_latin2'a')), coercibility(ucase(_latin2'a'));
 select collation(left(_latin2'a',1)), coercibility(left(_latin2'a',1));
@@ -155,9 +161,16 @@ select collation(quote(_latin2'ab')), coercibility(quote(_latin2'ab'));
 select collation(soundex(_latin2'ab')), coercibility(soundex(_latin2'ab'));
 select collation(substring(_latin2'ab',1)), coercibility(substring(_latin2'ab',1));
 select collation(insert(_latin2'abcd',2,3,_latin2'ef')), coercibility(insert(_latin2'abcd',2,3,_latin2'ef'));
+select collation(replace(_latin2'abcd',_latin2'b',_latin2'B')), coercibility(replace(_latin2'abcd',_latin2'b',_latin2'B'));
 
 create table t1 
 select
+  bin(130),
+  oct(130),
+  conv(130,16,10),
+  hex(130),
+  char(130),
+  format(130,10),
   left(_latin2'a',1),
   right(_latin2'a',1), 
   lcase(_latin2'a'), 
@@ -176,8 +189,8 @@ select
   quote(_latin2'ab'),
   soundex(_latin2'ab'),
   substring(_latin2'ab',1),
-  insert(_latin2'abcd',2,3,_latin2'ef')
+  insert(_latin2'abcd',2,3,_latin2'ef'),
+  replace(_latin2'abcd',_latin2'b',_latin2'B')
 ;
-
 show create table t1;
 drop table t1;
diff --git a/sql/item.cc b/sql/item.cc
index cdd78572a0a..57efd3e7bf3 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -39,7 +39,7 @@ Item::Item():
 {
   marker= 0;
   maybe_null=null_value=with_sum_func=unsigned_flag=0;
-  coercibility=COER_IMPLICIT;
+  coercibility=COER_COERCIBLE;
   name= 0;
   decimals= 0; max_length= 0;
   THD *thd= current_thd;
diff --git a/sql/item_strfunc.cc b/sql/item_strfunc.cc
index d660f7c472c..9ab20281a97 100644
--- a/sql/item_strfunc.cc
+++ b/sql/item_strfunc.cc
@@ -813,6 +813,7 @@ null:
 
 void Item_func_replace::fix_length_and_dec()
 {
+  uint i;
   max_length=args[0]->max_length;
   int diff=(int) (args[2]->max_length - args[1]->max_length);
   if (diff > 0 && args[1]->max_length)
@@ -825,6 +826,20 @@ void Item_func_replace::fix_length_and_dec()
     max_length=MAX_BLOB_WIDTH;
     maybe_null=1;
   }
+  set_charset(args[0]->charset(), args[0]->coercibility);
+  
+  for (i=1; i<3; i++)
+  {
+    if (set_charset(charset(), coercibility,
+        args[i]->charset(), args[i]->coercibility))
+    {
+      my_error(ER_CANT_AGGREGATE_COLLATIONS,MYF(0),
+	       charset()->name,coercion_name(coercibility),
+	       args[i]->charset()->name,coercion_name(args[i]->coercibility),
+	       func_name());
+      break;
+    }
+  }
 }
 
 
diff --git a/sql/item_strfunc.h b/sql/item_strfunc.h
index 26c69668b0a..6bb1c510013 100644
--- a/sql/item_strfunc.h
+++ b/sql/item_strfunc.h
@@ -433,6 +433,7 @@ public:
   String *val_str(String *);
   void fix_length_and_dec()
   {
+    set_charset(default_charset());
     max_length=args[0]->max_length+(args[0]->max_length-args[0]->decimals)/3;
   }
   const char *func_name() const { return "format"; }
@@ -444,7 +445,11 @@ class Item_func_char :public Item_str_func
 public:
   Item_func_char(List<Item> &list) :Item_str_func(list) {}
   String *val_str(String *);
-  void fix_length_and_dec() { maybe_null=0; max_length=arg_count; }
+  void fix_length_and_dec() 
+  { 
+    set_charset(default_charset());
+    maybe_null=0; max_length=arg_count;
+  }
   const char *func_name() const { return "char"; }
 };
 
@@ -490,7 +495,11 @@ public:
   Item_func_conv(Item *a,Item *b,Item *c) :Item_str_func(a,b,c) {}
   const char *func_name() const { return "conv"; }
   String *val_str(String *);
-  void fix_length_and_dec() { decimals=0; max_length=64; }
+  void fix_length_and_dec() 
+  { 
+    set_charset(default_charset());
+    decimals=0; max_length=64; 
+  }
 };
 
 
@@ -501,7 +510,11 @@ public:
   Item_func_hex(Item *a) :Item_str_func(a) {}
   const char *func_name() const { return "hex"; }
   String *val_str(String *);
-  void fix_length_and_dec() { decimals=0; max_length=args[0]->max_length*2; }
+  void fix_length_and_dec() 
+  { 
+    set_charset(default_charset());
+    decimals=0; max_length=args[0]->max_length*2;
+  }
 };