diff --git a/myisam/mi_dynrec.c b/myisam/mi_dynrec.c
index bc0389980b9..ef5ab73f1a9 100644
--- a/myisam/mi_dynrec.c
+++ b/myisam/mi_dynrec.c
@@ -1130,12 +1130,41 @@ void _my_store_blob_length(byte *pos,uint pack_length,uint length)
 }
 
 
-	/* Read record from datafile */
-	/* Returns 0 if ok, -1 if error */
+/*
+  Read record from datafile.
+
+  SYNOPSIS
+    _mi_read_dynamic_record()
+      info                      MI_INFO pointer to table.
+      filepos                   From where to read the record.
+      buf                       Destination for record.
+
+  NOTE
+
+    If a write buffer is active, it needs to be flushed if its contents
+    intersects with the record to read. We always check if the position
+    of the first byte of the write buffer is lower than the position
+    past the last byte to read. In theory this is also true if the write
+    buffer is completely below the read segment. That is, if there is no
+    intersection. But this case is unusual. We flush anyway. Only if the
+    first byte in the write buffer is above the last byte to read, we do
+    not flush.
+
+    A dynamic record may need several reads. So this check must be done
+    before every read. Reading a dynamic record starts with reading the
+    block header. If the record does not fit into the free space of the
+    header, the block may be longer than the header. In this case a
+    second read is necessary. These one or two reads repeat for every
+    part of the record.
+
+  RETURN
+    0           OK
+    -1          Error
+*/
 
 int _mi_read_dynamic_record(MI_INFO *info, my_off_t filepos, byte *buf)
 {
-  int flag;
+  int block_of_record;
   uint b_type,left_length;
   byte *to;
   MI_BLOCK_INFO block_info;
@@ -1147,20 +1176,19 @@ int _mi_read_dynamic_record(MI_INFO *info, my_off_t filepos, byte *buf)
     LINT_INIT(to);
     LINT_INIT(left_length);
     file=info->dfile;
-    block_info.next_filepos=filepos;	/* for easyer loop */
-    flag=block_info.second_read=0;
+    block_of_record= 0;   /* First block of record is numbered as zero. */
+    block_info.second_read= 0;
     do
     {
+      /* A corrupted table can have wrong pointers. (Bug# 19835) */
+      if (filepos == HA_OFFSET_ERROR)
+        goto panic;
       if (info->opt_flag & WRITE_CACHE_USED &&
-	  info->rec_cache.pos_in_file <= block_info.next_filepos &&
+	  info->rec_cache.pos_in_file < filepos + MI_BLOCK_INFO_HEADER_LENGTH &&
 	  flush_io_cache(&info->rec_cache))
 	goto err;
-      /* A corrupted table can have wrong pointers. (Bug# 19835) */
-      if (block_info.next_filepos == HA_OFFSET_ERROR)
-        goto panic;
       info->rec_cache.seek_not_done=1;
-      if ((b_type=_mi_get_block_info(&block_info,file,
-				     block_info.next_filepos))
+      if ((b_type= _mi_get_block_info(&block_info, file, filepos))
 	  & (BLOCK_DELETED | BLOCK_ERROR | BLOCK_SYNC_ERROR |
 	     BLOCK_FATAL_ERROR))
       {
@@ -1168,9 +1196,8 @@ int _mi_read_dynamic_record(MI_INFO *info, my_off_t filepos, byte *buf)
 	  my_errno=HA_ERR_RECORD_DELETED;
 	goto err;
       }
-      if (flag == 0)			/* First block */
+      if (block_of_record++ == 0)			/* First block */
       {
-	flag=1;
 	if (block_info.rec_len > (uint) info->s->base.max_pack_length)
 	  goto panic;
 	if (info->s->base.blobs)
@@ -1185,11 +1212,35 @@ int _mi_read_dynamic_record(MI_INFO *info, my_off_t filepos, byte *buf)
       }
       if (left_length < block_info.data_len || ! block_info.data_len)
 	goto panic;			/* Wrong linked record */
-      if (my_pread(file,(byte*) to,block_info.data_len,block_info.filepos,
-		   MYF(MY_NABP)))
-	goto panic;
-      left_length-=block_info.data_len;
-      to+=block_info.data_len;
+      /* copy information that is already read */
+      {
+        uint offset= (uint) (block_info.filepos - filepos);
+        uint prefetch_len= (sizeof(block_info.header) - offset);
+        filepos+= sizeof(block_info.header);
+
+        if (prefetch_len > block_info.data_len)
+          prefetch_len= block_info.data_len;
+        if (prefetch_len)
+        {
+          memcpy((byte*) to, block_info.header + offset, prefetch_len);
+          block_info.data_len-= prefetch_len;
+          left_length-= prefetch_len;
+          to+= prefetch_len;
+        }
+      }
+      /* read rest of record from file */
+      if (block_info.data_len)
+      {
+        if (info->opt_flag & WRITE_CACHE_USED &&
+            info->rec_cache.pos_in_file < filepos + block_info.data_len &&
+            flush_io_cache(&info->rec_cache))
+          goto err;
+        if (my_read(file, (byte*) to, block_info.data_len, MYF(MY_NABP)))
+          goto panic;
+        left_length-=block_info.data_len;
+        to+=block_info.data_len;
+      }
+      filepos= block_info.next_filepos;
     } while (left_length);
 
     info->update|= HA_STATE_AKTIV;	/* We have a aktive record */
@@ -1346,11 +1397,45 @@ err:
 }
 
 
+/*
+  Read record from datafile.
+
+  SYNOPSIS
+    _mi_read_rnd_dynamic_record()
+      info                      MI_INFO pointer to table.
+      buf                       Destination for record.
+      filepos                   From where to read the record.
+      skip_deleted_blocks       If to repeat reading until a non-deleted
+                                record is found.
+
+  NOTE
+
+    If a write buffer is active, it needs to be flushed if its contents
+    intersects with the record to read. We always check if the position
+    of the first byte of the write buffer is lower than the position
+    past the last byte to read. In theory this is also true if the write
+    buffer is completely below the read segment. That is, if there is no
+    intersection. But this case is unusual. We flush anyway. Only if the
+    first byte in the write buffer is above the last byte to read, we do
+    not flush.
+
+    A dynamic record may need several reads. So this check must be done
+    before every read. Reading a dynamic record starts with reading the
+    block header. If the record does not fit into the free space of the
+    header, the block may be longer than the header. In this case a
+    second read is necessary. These one or two reads repeat for every
+    part of the record.
+
+  RETURN
+    0           OK
+    != 0        Error
+*/
+
 int _mi_read_rnd_dynamic_record(MI_INFO *info, byte *buf,
 				register my_off_t filepos,
 				my_bool skip_deleted_blocks)
 {
-  int flag,info_read,save_errno;
+  int block_of_record, info_read, save_errno;
   uint left_len,b_type;
   byte *to;
   MI_BLOCK_INFO block_info;
@@ -1376,7 +1461,8 @@ int _mi_read_rnd_dynamic_record(MI_INFO *info, byte *buf,
   else
     info_read=1;				/* memory-keyinfoblock is ok */
 
-  flag=block_info.second_read=0;
+  block_of_record= 0;   /* First block of record is numbered as zero. */
+  block_info.second_read= 0;
   left_len=1;
   do
   {
@@ -1399,15 +1485,15 @@ int _mi_read_rnd_dynamic_record(MI_INFO *info, byte *buf,
     {
       if (_mi_read_cache(&info->rec_cache,(byte*) block_info.header,filepos,
 			 sizeof(block_info.header),
-			 (!flag && skip_deleted_blocks ? READING_NEXT : 0) |
-			 READING_HEADER))
+			 (!block_of_record && skip_deleted_blocks ?
+                          READING_NEXT : 0) | READING_HEADER))
 	goto panic;
       b_type=_mi_get_block_info(&block_info,-1,filepos);
     }
     else
     {
       if (info->opt_flag & WRITE_CACHE_USED &&
-	  info->rec_cache.pos_in_file <= filepos &&
+	  info->rec_cache.pos_in_file < filepos + MI_BLOCK_INFO_HEADER_LENGTH &&
 	  flush_io_cache(&info->rec_cache))
 	DBUG_RETURN(my_errno);
       info->rec_cache.seek_not_done=1;
@@ -1432,7 +1518,7 @@ int _mi_read_rnd_dynamic_record(MI_INFO *info, byte *buf,
       }
       goto err;
     }
-    if (flag == 0)				/* First block */
+    if (block_of_record == 0)				/* First block */
     {
       if (block_info.rec_len > (uint) share->base.max_pack_length)
 	goto panic;
@@ -1465,7 +1551,7 @@ int _mi_read_rnd_dynamic_record(MI_INFO *info, byte *buf,
 	left_len-=tmp_length;
 	to+=tmp_length;
 	filepos+=tmp_length;
-     }
+      }
     }
     /* read rest of record from file */
     if (block_info.data_len)
@@ -1474,11 +1560,17 @@ int _mi_read_rnd_dynamic_record(MI_INFO *info, byte *buf,
       {
 	if (_mi_read_cache(&info->rec_cache,(byte*) to,filepos,
 			   block_info.data_len,
-			   (!flag && skip_deleted_blocks) ? READING_NEXT :0))
+			   (!block_of_record && skip_deleted_blocks) ?
+                           READING_NEXT : 0))
 	  goto panic;
       }
       else
       {
+        if (info->opt_flag & WRITE_CACHE_USED &&
+            info->rec_cache.pos_in_file <
+            block_info.filepos + block_info.data_len &&
+            flush_io_cache(&info->rec_cache))
+          goto err;
 	/* VOID(my_seek(info->dfile,filepos,MY_SEEK_SET,MYF(0))); */
 	if (my_read(info->dfile,(byte*) to,block_info.data_len,MYF(MY_NABP)))
 	{
@@ -1488,10 +1580,14 @@ int _mi_read_rnd_dynamic_record(MI_INFO *info, byte *buf,
 	}
       }
     }
-    if (flag++ == 0)
+    /*
+      Increment block-of-record counter. If it was the first block,
+      remember the position behind the block for the next call.
+    */
+    if (block_of_record++ == 0)
     {
-      info->nextpos=block_info.filepos+block_info.block_len;
-      skip_deleted_blocks=0;
+      info->nextpos= block_info.filepos + block_info.block_len;
+      skip_deleted_blocks= 0;
     }
     left_len-=block_info.data_len;
     to+=block_info.data_len;
@@ -1523,6 +1619,11 @@ uint _mi_get_block_info(MI_BLOCK_INFO *info, File file, my_off_t filepos)
 
   if (file >= 0)
   {
+    /*
+      We do not use my_pread() here because we want to have the file
+      pointer set to the end of the header after this function.
+      my_pread() may leave the file pointer untouched.
+    */
     VOID(my_seek(file,filepos,MY_SEEK_SET,MYF(0)));
     if (my_read(file,(char*) header,sizeof(info->header),MYF(0)) !=
 	sizeof(info->header))
diff --git a/mysql-test/r/auto_increment.result b/mysql-test/r/auto_increment.result
index afbff905699..d0058118e4c 100644
--- a/mysql-test/r/auto_increment.result
+++ b/mysql-test/r/auto_increment.result
@@ -232,7 +232,7 @@ a	b
 delete from t1 where a=0;
 update t1 set a=NULL where b=6;
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 4
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 4
 update t1 set a=300 where b=7;
 SET SQL_MODE='';
 insert into t1(a,b)values(NULL,8);
@@ -274,7 +274,7 @@ a	b
 delete from t1 where a=0;
 update t1 set a=NULL where b=13;
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 9
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 9
 update t1 set a=500 where b=14;
 select * from t1 order by b;
 a	b
diff --git a/mysql-test/r/create.result b/mysql-test/r/create.result
index ed83dfb4b49..3f8083a0e20 100644
--- a/mysql-test/r/create.result
+++ b/mysql-test/r/create.result
@@ -13,7 +13,7 @@ Warnings:
 Note	1050	Table 't1' already exists
 insert into t1 values (""),(null);
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'b' at row 2
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'b' at row 2
 select * from t1;
 b
 
diff --git a/mysql-test/r/ctype_cp1250_ch.result b/mysql-test/r/ctype_cp1250_ch.result
index 533bfb8cb53..b55849e4e12 100644
--- a/mysql-test/r/ctype_cp1250_ch.result
+++ b/mysql-test/r/ctype_cp1250_ch.result
@@ -42,3 +42,11 @@ id	str
 6	aaaaaa
 7	aaaaaaa
 drop table t1;
+set names cp1250;
+create table t1 (a varchar(15) collate cp1250_czech_cs NOT NULL, primary key(a));
+insert into t1 values("abcdefghá");
+insert into t1 values("ááèè");
+select a from t1 where a like "abcdefghá";
+a
+abcdefghá
+drop table t1;
diff --git a/mysql-test/r/federated.result b/mysql-test/r/federated.result
index 454790f2df6..2b44fc8bd7e 100644
--- a/mysql-test/r/federated.result
+++ b/mysql-test/r/federated.result
@@ -1788,6 +1788,33 @@ length(a)
 5000
 drop table t1;
 drop table t1;
+DROP TABLE IF EXISTS federated.test;
+CREATE TABLE federated.test (
+`i` int(11) NOT NULL,
+`j` int(11) NOT NULL,
+`c` varchar(30) default NULL,
+PRIMARY KEY  (`i`,`j`),
+UNIQUE KEY `i` (`i`,`c`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+DROP TABLE IF EXISTS federated.test1;
+DROP TABLE IF EXISTS federated.test2;
+create table federated.test1 (
+i int not null,
+j int not null,
+c varchar(30),
+primary key (i,j),
+unique key (i, c))
+engine = federated
+connection='mysql://root@127.0.0.1:SLAVE_PORT/federated/test';
+create table federated.test2 (
+i int default null,
+j int not null,
+c varchar(30),
+key (i))
+engine = federated
+connection='mysql://root@127.0.0.1:SLAVE_PORT/federated/test';
+drop table federated.test1, federated.test2;
+drop table federated.test;
 DROP TABLE IF EXISTS federated.t1;
 DROP DATABASE IF EXISTS federated;
 DROP TABLE IF EXISTS federated.t1;
diff --git a/mysql-test/r/insert.result b/mysql-test/r/insert.result
index 82fad8e912c..80723d68b5a 100644
--- a/mysql-test/r/insert.result
+++ b/mysql-test/r/insert.result
@@ -63,7 +63,7 @@ insert into t1 values(NULL);
 ERROR 23000: Column 'id' cannot be null
 insert into t1 values (1), (NULL), (2);
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'id' at row 2
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'id' at row 2
 select * from t1;
 id
 1
diff --git a/mysql-test/r/insert_select.result b/mysql-test/r/insert_select.result
index 3e2721fc09a..89ac863b8d2 100644
--- a/mysql-test/r/insert_select.result
+++ b/mysql-test/r/insert_select.result
@@ -606,8 +606,8 @@ NULL	2	100
 create table t2(No int not null, Field int not null, Count int not null);
 insert into t2 Select null, Field, Count From t1 Where Month=20030901 and Type=2;
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'No' at row 1
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'No' at row 2
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'No' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'No' at row 2
 select * from t2;
 No	Field	Count
 0	1	100
diff --git a/mysql-test/r/key.result b/mysql-test/r/key.result
index 0174ea45935..eea884e4294 100644
--- a/mysql-test/r/key.result
+++ b/mysql-test/r/key.result
@@ -159,8 +159,8 @@ CREATE TABLE t1 (c CHAR(10) NOT NULL,i INT NOT NULL AUTO_INCREMENT,
 UNIQUE (c,i));
 INSERT INTO t1 (c) VALUES (NULL),(NULL);
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'c' at row 1
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'c' at row 2
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'c' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'c' at row 2
 SELECT * FROM t1;
 c	i
 	1
diff --git a/mysql-test/r/mysqldump.result b/mysql-test/r/mysqldump.result
index 4c684be0a3c..6669b33e1bb 100644
--- a/mysql-test/r/mysqldump.result
+++ b/mysql-test/r/mysqldump.result
@@ -2876,7 +2876,7 @@ drop view v1;
 drop table t1;
 drop database mysqldump_dbb;
 use test;
-create user mysqltest_1;
+create user mysqltest_1@localhost;
 create table t1(a int, b varchar(34));
 reset master;
 mysqldump: Couldn't execute 'FLUSH TABLES': Access denied; you need the RELOAD privilege for this operation (1227)
@@ -2891,4 +2891,4 @@ CREATE TABLE `t1` (
   `b` varchar(34) default NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1;
 drop table t1;
-drop user mysqltest_1;
+drop user mysqltest_1@localhost;
diff --git a/mysql-test/r/null.result b/mysql-test/r/null.result
index 18eb10f0673..daedfa50b80 100644
--- a/mysql-test/r/null.result
+++ b/mysql-test/r/null.result
@@ -97,39 +97,39 @@ Warnings:
 Warning	1265	Data truncated for column 'd' at row 1
 UPDATE t1 SET d=NULL;
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'd' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'd' at row 1
 INSERT INTO t1 (a) values (null);
 ERROR 23000: Column 'a' cannot be null
 INSERT INTO t1 (a) values (1/null);
 ERROR 23000: Column 'a' cannot be null
 INSERT INTO t1 (a) values (null),(null);
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 1
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 2
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 2
 INSERT INTO t1 (b) values (null);
 ERROR 23000: Column 'b' cannot be null
 INSERT INTO t1 (b) values (1/null);
 ERROR 23000: Column 'b' cannot be null
 INSERT INTO t1 (b) values (null),(null);
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'b' at row 1
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'b' at row 2
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'b' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'b' at row 2
 INSERT INTO t1 (c) values (null);
 ERROR 23000: Column 'c' cannot be null
 INSERT INTO t1 (c) values (1/null);
 ERROR 23000: Column 'c' cannot be null
 INSERT INTO t1 (c) values (null),(null);
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'c' at row 1
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'c' at row 2
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'c' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'c' at row 2
 INSERT INTO t1 (d) values (null);
 ERROR 23000: Column 'd' cannot be null
 INSERT INTO t1 (d) values (1/null);
 ERROR 23000: Column 'd' cannot be null
 INSERT INTO t1 (d) values (null),(null);
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'd' at row 1
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'd' at row 2
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'd' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'd' at row 2
 select * from t1;
 a	b	c	d
 	0	0000-00-00 00:00:00	0
diff --git a/mysql-test/r/null_key.result b/mysql-test/r/null_key.result
index 7f746a3dbd8..6eb3cf312a0 100644
--- a/mysql-test/r/null_key.result
+++ b/mysql-test/r/null_key.result
@@ -342,7 +342,7 @@ index (id2)
 );
 insert into t1 values(null,null),(1,1);
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'id2' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'id2' at row 1
 select * from t1;
 id	id2
 NULL	0
diff --git a/mysql-test/r/ps_2myisam.result b/mysql-test/r/ps_2myisam.result
index aa355067d1f..205c084b71f 100644
--- a/mysql-test/r/ps_2myisam.result
+++ b/mysql-test/r/ps_2myisam.result
@@ -1304,7 +1304,7 @@ set @arg00=NULL;
 set @arg01=2;
 execute stmt1 using @arg00, @arg01;
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 1
 select a,b from t1 order by a;
 a	b
 0	two
diff --git a/mysql-test/r/ps_3innodb.result b/mysql-test/r/ps_3innodb.result
index ea7ed9371e8..2e7c4785542 100644
--- a/mysql-test/r/ps_3innodb.result
+++ b/mysql-test/r/ps_3innodb.result
@@ -1287,7 +1287,7 @@ set @arg00=NULL;
 set @arg01=2;
 execute stmt1 using @arg00, @arg01;
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 1
 select a,b from t1 order by a;
 a	b
 0	two
diff --git a/mysql-test/r/ps_4heap.result b/mysql-test/r/ps_4heap.result
index fe4de89d6c7..8a0da364598 100644
--- a/mysql-test/r/ps_4heap.result
+++ b/mysql-test/r/ps_4heap.result
@@ -1288,7 +1288,7 @@ set @arg00=NULL;
 set @arg01=2;
 execute stmt1 using @arg00, @arg01;
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 1
 select a,b from t1 order by a;
 a	b
 0	two
diff --git a/mysql-test/r/ps_5merge.result b/mysql-test/r/ps_5merge.result
index bee7b2400b8..1c6e11f203c 100644
--- a/mysql-test/r/ps_5merge.result
+++ b/mysql-test/r/ps_5merge.result
@@ -1330,7 +1330,7 @@ set @arg00=NULL;
 set @arg01=2;
 execute stmt1 using @arg00, @arg01;
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 1
 select a,b from t1 order by a;
 a	b
 0	two
@@ -4344,7 +4344,7 @@ set @arg00=NULL;
 set @arg01=2;
 execute stmt1 using @arg00, @arg01;
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 1
 select a,b from t1 order by a;
 a	b
 0	two
diff --git a/mysql-test/r/ps_6bdb.result b/mysql-test/r/ps_6bdb.result
index d352ec9f9e2..3546b05870a 100644
--- a/mysql-test/r/ps_6bdb.result
+++ b/mysql-test/r/ps_6bdb.result
@@ -1287,7 +1287,7 @@ set @arg00=NULL;
 set @arg01=2;
 execute stmt1 using @arg00, @arg01;
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 1
 select a,b from t1 order by a;
 a	b
 0	two
diff --git a/mysql-test/r/ps_7ndb.result b/mysql-test/r/ps_7ndb.result
index 8ce4c624fbc..b1986ca62dc 100644
--- a/mysql-test/r/ps_7ndb.result
+++ b/mysql-test/r/ps_7ndb.result
@@ -1287,7 +1287,7 @@ set @arg00=NULL;
 set @arg01=2;
 execute stmt1 using @arg00, @arg01;
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 1
 select a,b from t1 order by a;
 a	b
 0	two
diff --git a/mysql-test/r/strict.result b/mysql-test/r/strict.result
index 08a33734910..e144eed92f5 100644
--- a/mysql-test/r/strict.result
+++ b/mysql-test/r/strict.result
@@ -997,16 +997,16 @@ ERROR 23000: Column 'col2' cannot be null
 INSERT INTO t1 VALUES (103,'',NULL);
 ERROR 23000: Column 'col3' cannot be null
 UPDATE t1 SET col1=NULL WHERE col1 =100;
-ERROR 22004: Column set to default value; NULL supplied to NOT NULL column 'col1' at row 1
+ERROR 22004: Column was set to data type implicit default; NULL supplied for NOT NULL column 'col1' at row 1
 UPDATE t1 SET col2 =NULL WHERE col2 ='hello';
-ERROR 22004: Column set to default value; NULL supplied to NOT NULL column 'col2' at row 1
+ERROR 22004: Column was set to data type implicit default; NULL supplied for NOT NULL column 'col2' at row 1
 UPDATE t1 SET col2 =NULL where col3 IS NOT NULL;
-ERROR 22004: Column set to default value; NULL supplied to NOT NULL column 'col2' at row 1
+ERROR 22004: Column was set to data type implicit default; NULL supplied for NOT NULL column 'col2' at row 1
 INSERT IGNORE INTO t1 values (NULL,NULL,NULL);
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'col1' at row 1
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'col2' at row 1
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'col3' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'col1' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'col2' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'col3' at row 1
 SELECT * FROM t1;
 col1	col2	col3
 100	hello	2004-08-20
@@ -1031,11 +1031,11 @@ ERROR HY000: Field 'col2' doesn't have a default value
 INSERT INTO t1 (col1) SELECT 1;
 ERROR HY000: Field 'col2' doesn't have a default value
 INSERT INTO t1 SELECT 1,NULL;
-ERROR 22004: Column set to default value; NULL supplied to NOT NULL column 'col2' at row 1
+ERROR 22004: Column was set to data type implicit default; NULL supplied for NOT NULL column 'col2' at row 1
 INSERT IGNORE INTO t1 values (NULL,NULL);
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'col1' at row 1
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'col2' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'col1' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'col2' at row 1
 INSERT IGNORE INTO t1 (col1) values (3);
 Warnings:
 Warning	1364	Field 'col2' doesn't have a default value
diff --git a/mysql-test/r/view.result b/mysql-test/r/view.result
index 534065a33b6..e7e953e28d9 100644
--- a/mysql-test/r/view.result
+++ b/mysql-test/r/view.result
@@ -1495,7 +1495,7 @@ insert into v3(b) values (10);
 insert into v3(a) select a from t2;
 insert into v3(b) select b from t2;
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 2
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 2
 insert into v3(a) values (1) on duplicate key update a=a+10000+VALUES(a);
 select * from t1;
 a	b
diff --git a/mysql-test/r/warnings.result b/mysql-test/r/warnings.result
index 59be512d5a6..283a0661721 100644
--- a/mysql-test/r/warnings.result
+++ b/mysql-test/r/warnings.result
@@ -72,7 +72,7 @@ drop table t1;
 create table t1(a tinyint, b int not null, c date, d char(5));
 load data infile '../std_data_ln/warnings_loaddata.dat' into table t1 fields terminated by ',';
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'b' at row 2
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'b' at row 2
 Warning	1265	Data truncated for column 'd' at row 3
 Warning	1265	Data truncated for column 'c' at row 4
 Warning	1261	Row 5 doesn't contain data for all columns
@@ -86,7 +86,7 @@ drop table t1;
 create table t1(a tinyint NOT NULL, b tinyint unsigned, c char(5));
 insert into t1 values(NULL,100,'mysql'),(10,-1,'mysql ab'),(500,256,'open source'),(20,NULL,'test');
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 1
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 1
 Warning	1264	Out of range value adjusted for column 'b' at row 2
 Warning	1265	Data truncated for column 'c' at row 2
 Warning	1264	Out of range value adjusted for column 'a' at row 3
@@ -99,7 +99,7 @@ Warning	1265	Data truncated for column 'c' at row 2
 alter table t1 add d char(2);
 update t1 set a=NULL where a=10;
 Warnings:
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 2
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 2
 update t1 set c='mysql ab' where c='test';
 Warnings:
 Warning	1265	Data truncated for column 'c' at row 4
@@ -115,7 +115,7 @@ Warnings:
 Warning	1265	Data truncated for column 'b' at row 1
 Warning	1265	Data truncated for column 'b' at row 2
 Warning	1265	Data truncated for column 'b' at row 3
-Warning	1263	Column set to default value; NULL supplied to NOT NULL column 'a' at row 4
+Warning	1263	Column was set to data type implicit default; NULL supplied for NOT NULL column 'a' at row 4
 Warning	1265	Data truncated for column 'b' at row 4
 insert into t2(b) values('mysqlab');
 Warnings:
diff --git a/mysql-test/t/ctype_cp1250_ch.test b/mysql-test/t/ctype_cp1250_ch.test
index 2d1e5f0bf9d..65550e0c193 100644
--- a/mysql-test/t/ctype_cp1250_ch.test
+++ b/mysql-test/t/ctype_cp1250_ch.test
@@ -44,4 +44,14 @@ INSERT INTO t1 VALUES (NULL, 'aaaaaaa');
 select * from t1 where str like 'aa%';
 drop table t1;
 
+#
+# Bug#19741 segfault with cp1250 charset + like + primary key + 64bit os
+#
+set names cp1250;
+create table t1 (a varchar(15) collate cp1250_czech_cs NOT NULL, primary key(a));
+insert into t1 values("abcdefghá");
+insert into t1 values("ááèè");
+select a from t1 where a like "abcdefghá";
+drop table t1;
+
 # End of 4.1 tests
diff --git a/mysql-test/t/federated.test b/mysql-test/t/federated.test
index 38beab605fd..c2218b3451b 100644
--- a/mysql-test/t/federated.test
+++ b/mysql-test/t/federated.test
@@ -1499,4 +1499,49 @@ drop table t1;
 connection master;
 drop table t1;
 
+#
+# BUG #15133: unique index with nullable value not accepted in federated table 
+#
+
+connection slave;
+--disable_warnings
+DROP TABLE IF EXISTS federated.test;
+CREATE TABLE federated.test (
+  `i` int(11) NOT NULL,
+  `j` int(11) NOT NULL,
+  `c` varchar(30) default NULL,
+  PRIMARY KEY  (`i`,`j`),
+  UNIQUE KEY `i` (`i`,`c`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+--enable_warnings
+
+connection master;
+--disable_warnings
+DROP TABLE IF EXISTS federated.test1;
+DROP TABLE IF EXISTS federated.test2;
+--enable_warnings
+
+--replace_result $SLAVE_MYPORT SLAVE_PORT
+eval create table federated.test1 (
+        i int not null,
+        j int not null,
+        c varchar(30),
+        primary key (i,j),
+        unique key (i, c))
+engine = federated
+connection='mysql://root@127.0.0.1:$SLAVE_MYPORT/federated/test';
+
+--replace_result $SLAVE_MYPORT SLAVE_PORT
+eval create table federated.test2 (
+        i int default null,
+        j int not null,
+        c varchar(30),
+        key (i))
+engine = federated
+connection='mysql://root@127.0.0.1:$SLAVE_MYPORT/federated/test';
+drop table federated.test1, federated.test2;
+
+connection slave;
+drop table federated.test;
+
 source include/federated_cleanup.inc;
diff --git a/mysql-test/t/mysqldump.test b/mysql-test/t/mysqldump.test
index 4cdfabd4484..848c5360db7 100644
--- a/mysql-test/t/mysqldump.test
+++ b/mysql-test/t/mysqldump.test
@@ -1273,7 +1273,7 @@ drop database mysqldump_dbb;
 use test;
 
 # Create user without sufficient privs to perform the requested operation
-create user mysqltest_1;
+create user mysqltest_1@localhost;
 create table t1(a int, b varchar(34));
 
 # To get consistent output, reset the master, starts over from first log
@@ -1308,4 +1308,4 @@ grant REPLICATION CLIENT on *.* to mysqltest_1@localhost;
 
 # Clean up
 drop table t1;
-drop user mysqltest_1;
+drop user mysqltest_1@localhost;
diff --git a/sql/examples/ha_tina.cc b/sql/examples/ha_tina.cc
index 8ae82f97d0b..524ce5eb693 100644
--- a/sql/examples/ha_tina.cc
+++ b/sql/examples/ha_tina.cc
@@ -101,13 +101,34 @@ static byte* tina_get_key(TINA_SHARE *share,uint *length,
   return (byte*) share->table_name;
 }
 
+
+int free_mmap(TINA_SHARE *share)
+{
+  DBUG_ENTER("ha_tina::free_mmap");
+  if (share->mapped_file)
+  {
+    /*
+      Invalidate the mapped in pages. Some operating systems (eg OpenBSD)
+      would reuse already cached pages even if the file has been altered
+      using fd based I/O. This may be optimized by perhaps only invalidating
+      the last page but optimization of deprecated code is not important.
+    */
+    msync(share->mapped_file, 0, MS_INVALIDATE);
+    if (munmap(share->mapped_file, share->file_stat.st_size))
+      DBUG_RETURN(1);
+  }
+  share->mapped_file= NULL;
+  DBUG_RETURN(0);
+}
+
 /*
   Reloads the mmap file.
 */
 int get_mmap(TINA_SHARE *share, int write)
 {
   DBUG_ENTER("ha_tina::get_mmap");
-  if (share->mapped_file && munmap(share->mapped_file, share->file_stat.st_size))
+  
+  if (free_mmap(share))
     DBUG_RETURN(1);
 
   if (my_fstat(share->data_file, &share->file_stat, MYF(MY_WME)) == -1)
@@ -230,8 +251,7 @@ static int free_share(TINA_SHARE *share)
   int result_code= 0;
   if (!--share->use_count){
     /* Drop the mapped file */
-    if (share->mapped_file) 
-      munmap(share->mapped_file, share->file_stat.st_size);
+    free_mmap(share);
     result_code= my_close(share->data_file,MYF(0));
     hash_delete(&tina_open_tables, (byte*) share);
     thr_lock_delete(&share->lock);
@@ -493,6 +513,13 @@ int ha_tina::write_row(byte * buf)
 
   size= encode_quote(buf);
 
+  /*
+    we are going to alter the file so we must invalidate the in memory pages
+    otherwise we risk a race between the in memory pages and the disk pages.
+  */
+  if (free_mmap(share))
+    DBUG_RETURN(-1);
+
   if (my_write(share->data_file, buffer.ptr(), size, MYF(MY_WME | MY_NABP)))
     DBUG_RETURN(-1);
 
@@ -534,8 +561,26 @@ int ha_tina::update_row(const byte * old_data, byte * new_data)
   if (chain_append())
     DBUG_RETURN(-1);
 
+  /*
+    we are going to alter the file so we must invalidate the in memory pages
+    otherwise we risk a race between the in memory pages and the disk pages.
+  */
+  if (free_mmap(share))
+    DBUG_RETURN(-1);
+
   if (my_write(share->data_file, buffer.ptr(), size, MYF(MY_WME | MY_NABP)))
     DBUG_RETURN(-1);
+
+  /* 
+    Ok, this is means that we will be doing potentially bad things 
+    during a bulk update on some OS'es. Ideally, we should extend the length
+    of the file, redo the mmap and then write all the updated rows. Upon
+    finishing the bulk update, truncate the file length to the final length.
+    Since this code is all being deprecated, not point now to optimize.
+  */
+  if (get_mmap(share, 0) > 0) 
+    DBUG_RETURN(-1);
+
   DBUG_RETURN(0);
 }
 
@@ -812,15 +857,14 @@ int ha_tina::rnd_end()
       length= length - (size_t)(ptr->end - ptr->begin);
     }
 
+    /* Invalidate all cached mmap pages */
+    if (free_mmap(share))
+      DBUG_RETURN(-1);
+
     /* Truncate the file to the new size */
     if (my_chsize(share->data_file, length, 0, MYF(MY_WME)))
       DBUG_RETURN(-1);
 
-    if (munmap(share->mapped_file, length))
-      DBUG_RETURN(-1);
-
-    /* We set it to null so that get_mmap() won't try to unmap it */
-    share->mapped_file= NULL;
     if (get_mmap(share, 0) > 0) 
       DBUG_RETURN(-1);
   }
@@ -838,6 +882,10 @@ int ha_tina::delete_all_rows()
   if (!records_is_known)
     return (my_errno=HA_ERR_WRONG_COMMAND);
 
+  /* Invalidate all cached mmap pages */
+  if (free_mmap(share)) 
+    DBUG_RETURN(-1);
+
   int rc= my_chsize(share->data_file, 0, 0, MYF(MY_WME));
 
   if (get_mmap(share, 0) > 0) 
diff --git a/sql/field.cc b/sql/field.cc
index 2c484bb0979..8395b8c6145 100644
--- a/sql/field.cc
+++ b/sql/field.cc
@@ -6412,6 +6412,11 @@ void Field_varstring::sql_type(String &res) const
 }
 
 
+uint Field_varstring::data_length(const char *from)
+{
+  return length_bytes == 1 ? (uint) (uchar) *ptr : uint2korr(ptr);
+}
+
 /*
   Functions to create a packed row.
   Here the number of length bytes are depending on the given max_length
diff --git a/sql/field.h b/sql/field.h
index 3306c4123db..2ad564fc753 100644
--- a/sql/field.h
+++ b/sql/field.h
@@ -144,6 +144,11 @@ public:
     table, which is located on disk).
   */
   virtual uint32 pack_length_in_rec() const { return pack_length(); }
+
+  /*
+    data_length() return the "real size" of the data in memory.
+  */
+  virtual uint32 data_length(const char *from) { return pack_length(); }
   virtual uint32 sort_length() const { return pack_length(); }
   virtual void reset(void) { bzero(ptr,pack_length()); }
   virtual void reset_fields() {}
@@ -1102,6 +1107,7 @@ public:
   int key_cmp(const byte *str, uint length);
   uint packed_col_length(const char *to, uint length);
   uint max_packed_col_length(uint max_length);
+  uint data_length(const char *from);
   uint size_of() const { return sizeof(*this); }
   enum_field_types real_type() const { return MYSQL_TYPE_VARCHAR; }
   bool has_charset(void) const
diff --git a/sql/ha_archive.cc b/sql/ha_archive.cc
index 3885defb4d5..0fb0bc9f791 100644
--- a/sql/ha_archive.cc
+++ b/sql/ha_archive.cc
@@ -710,6 +710,28 @@ int ha_archive::write_row(byte *buf)
     if (init_archive_writer())
       DBUG_RETURN(HA_ERR_CRASHED_ON_USAGE);
 
+  /*
+    Varchar structures are constant in size but are not cleaned up request
+    to request. The following sets all unused space to null to improve
+    compression.
+  */
+  for (Field **field=table->field ; *field ; field++)
+  {
+    DBUG_PRINT("archive",("Pack is %d\n", (*field)->pack_length()));
+    DBUG_PRINT("archive",("MyPack is %d\n", (*field)->data_length((char*) buf + (*field)->offset())));
+    if ((*field)->real_type() == MYSQL_TYPE_VARCHAR) 
+    {
+      uint actual_length= (*field)->data_length((char*) buf + (*field)->offset());
+      uint offset= (*field)->offset() + actual_length + 
+        (actual_length > 255 ? 2 : 1);
+      DBUG_PRINT("archive",("Offset is %d -> %d\n", actual_length, offset));
+      /*
+      if ((*field)->pack_length() + (*field)->offset() != offset)
+        bzero(buf + offset, (size_t)((*field)->pack_length() + (actual_length > 255 ? 2 : 1) - (*field)->data_length));
+    */
+    }
+  }
+
   share->rows_recorded++;
   rc= real_write_row(buf, share->archive_write);
   pthread_mutex_unlock(&share->mutex);
diff --git a/sql/ha_federated.cc b/sql/ha_federated.cc
index 2267c2b5d79..7919519cdce 100644
--- a/sql/ha_federated.cc
+++ b/sql/ha_federated.cc
@@ -332,6 +332,7 @@
 
 */
 
+
 #include "mysql_priv.h"
 #ifdef USE_PRAGMA_IMPLEMENTATION
 #pragma implementation                          // gcc: Class implementation
diff --git a/sql/ha_federated.h b/sql/ha_federated.h
index 85474d142a3..61f5af686a3 100644
--- a/sql/ha_federated.h
+++ b/sql/ha_federated.h
@@ -196,7 +196,9 @@ public:
     /* fix server to be able to get remote server table flags */
     return (HA_NOT_EXACT_COUNT |
             HA_PRIMARY_KEY_IN_READ_INDEX | HA_FILE_BASED | HA_REC_NOT_IN_SEQ |
-            HA_AUTO_PART_KEY | HA_CAN_INDEX_BLOBS| HA_NO_PREFIX_CHAR_KEYS);
+            HA_AUTO_PART_KEY | HA_CAN_INDEX_BLOBS| HA_NO_PREFIX_CHAR_KEYS |
+	    HA_NULL_IN_KEY
+	);
   }
   /*
     This is a bitmap of flags that says how the storage engine
diff --git a/sql/share/errmsg.txt b/sql/share/errmsg.txt
index 8a5cb3439f7..e90f54608e1 100644
--- a/sql/share/errmsg.txt
+++ b/sql/share/errmsg.txt
@@ -4893,8 +4893,8 @@ ER_WARN_TOO_MANY_RECORDS 01000
 	por "Conta de registro é maior que a conta de coluna na linha %ld"
 	spa "Línea %ld fué truncada; La misma contine mas datos que las que existen en las columnas de entrada"
 ER_WARN_NULL_TO_NOTNULL 22004 
-	eng "Column set to default value; NULL supplied to NOT NULL column '%s' at row %ld"
-	ger "Feld auf Vorgabewert gesetzt, da NULL für NOT-NULL-Feld '%s' in Zeile %ld angegeben"
+	eng "Column was set to data type implicit default; NULL supplied for NOT NULL column '%s' at row %ld"
+	ger "Feld auf Datentyp-spezifischen Vorgabewert gesetzt; da NULL für NOT-NULL-Feld '%s' in Zeile %ld angegeben"
 	por "Dado truncado, NULL fornecido para NOT NULL coluna '%s' na linha %ld"
 	spa "Datos truncado, NULL suministrado para NOT NULL columna '%s' en la línea %ld"
 ER_WARN_DATA_OUT_OF_RANGE 22003 
diff --git a/strings/ctype-win1250ch.c b/strings/ctype-win1250ch.c
index 0bc465f16ea..39948964a42 100644
--- a/strings/ctype-win1250ch.c
+++ b/strings/ctype-win1250ch.c
@@ -636,11 +636,11 @@ my_like_range_win1250ch(CHARSET_INFO *cs __attribute__((unused)),
       ptr++;					/* Skip escape */
     else if (*ptr == w_one || *ptr == w_many)	/* '_' or '%' in SQL */
       break;
-    *min_str = like_range_prefix_min_win1250ch[(uint)(*ptr)];
+    *min_str= like_range_prefix_min_win1250ch[(uint) (uchar) (*ptr)];
     if (*min_str != min_sort_char)
       only_min_found= 0;
     min_str++;
-    *max_str++= like_range_prefix_max_win1250ch[(uint)(*ptr)];
+    *max_str++= like_range_prefix_max_win1250ch[(uint) (uchar) (*ptr)];
   }
 
   if (cs->state & MY_CS_BINSORT)