diff --git a/mysql-test/r/bdb_notembedded.result b/mysql-test/r/bdb_notembedded.result
new file mode 100644
index 00000000000..14cb5fad915
--- /dev/null
+++ b/mysql-test/r/bdb_notembedded.result
@@ -0,0 +1,35 @@
+set autocommit=1;
+reset master;
+create table bug16206 (a int);
+insert into bug16206 values(1);
+start transaction;
+insert into bug16206 values(2);
+commit;
+show binlog events;
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+f	n	Format_desc	1	n	Server ver: VERSION, Binlog ver: 4
+f	n	Query	1	n	use `test`; create table bug16206 (a int)
+f	n	Query	1	n	use `test`; insert into bug16206 values(1)
+f	n	Query	1	n	use `test`; insert into bug16206 values(2)
+drop table bug16206;
+reset master;
+create table bug16206 (a int) engine=         bdb;
+insert into bug16206 values(0);
+insert into bug16206 values(1);
+start transaction;
+insert into bug16206 values(2);
+commit;
+insert into bug16206 values(3);
+show binlog events;
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+f	n	Format_desc	1	n	Server ver: VERSION, Binlog ver: 4
+f	n	Query	1	n	use `test`; create table bug16206 (a int) engine=         bdb
+f	n	Query	1	n	use `test`; insert into bug16206 values(0)
+f	n	Query	1	n	use `test`; insert into bug16206 values(1)
+f	n	Query	1	n	use `test`; BEGIN
+f	n	Query	1	n	use `test`; insert into bug16206 values(2)
+f	n	Query	1	n	use `test`; COMMIT
+f	n	Query	1	n	use `test`; insert into bug16206 values(3)
+drop table bug16206;
+set autocommit=0;
+End of 5.0 tests
diff --git a/mysql-test/r/type_blob.result b/mysql-test/r/type_blob.result
index 869efb535e6..369cc0cc9c0 100644
--- a/mysql-test/r/type_blob.result
+++ b/mysql-test/r/type_blob.result
@@ -807,4 +807,151 @@ set @@sql_mode='TRADITIONAL';
 create table t1 (a text default '');
 ERROR 42000: BLOB/TEXT column 'a' can't have a default value
 set @@sql_mode='';
+create table b15776 (data blob(2147483647));
+drop table b15776;
+create table b15776 (data blob(-1));
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-1))' at line 1
+create table b15776 (data blob(2147483648));
+drop table b15776;
+create table b15776 (data blob(4294967294));
+drop table b15776;
+create table b15776 (data blob(4294967295));
+drop table b15776;
+create table b15776 (data blob(4294967296));
+ERROR 42000: Display width out of range for column 'data' (max = 4294967295)
+CREATE TABLE b15776 (a blob(2147483647), b blob(2147483648), c blob(4294967295), a1 text(2147483647), b1 text(2147483648), c1 text(4294967295) );
+show columns from b15776;
+Field	Type	Null	Key	Default	Extra
+a	longblob	YES		NULL	
+b	longblob	YES		NULL	
+c	longblob	YES		NULL	
+a1	longtext	YES		NULL	
+b1	longtext	YES		NULL	
+c1	longtext	YES		NULL	
+drop table b15776;
+CREATE TABLE b15776 (a blob(4294967296));
+ERROR 42000: Display width out of range for column 'a' (max = 4294967295)
+CREATE TABLE b15776 (a text(4294967296));
+ERROR 42000: Display width out of range for column 'a' (max = 4294967295)
+CREATE TABLE b15776 (a blob(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+ERROR 42000: Display width out of range for column 'a' (max = 4294967295)
+CREATE TABLE b15776 (a text(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+ERROR 42000: Display width out of range for column 'a' (max = 4294967295)
+CREATE TABLE b15776 (a int(0));
+INSERT INTO b15776 values (NULL), (1), (42), (654);
+SELECT * from b15776 ORDER BY a;
+a
+NULL
+1
+42
+654
+DROP TABLE b15776;
+CREATE TABLE b15776 (a int(-1));
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-1))' at line 1
+CREATE TABLE b15776 (a int(255));
+DROP TABLE b15776;
+CREATE TABLE b15776 (a int(256));
+ERROR 42000: Display width out of range for column 'a' (max = 255)
+CREATE TABLE b15776 (data blob(-1));
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-1))' at line 1
+CREATE TABLE b15776 (a char(2147483647));
+ERROR 42000: Column length too big for column 'a' (max = 255); use BLOB or TEXT instead
+CREATE TABLE b15776 (a char(2147483648));
+ERROR 42000: Column length too big for column 'a' (max = 255); use BLOB or TEXT instead
+CREATE TABLE b15776 (a char(4294967295));
+ERROR 42000: Column length too big for column 'a' (max = 255); use BLOB or TEXT instead
+CREATE TABLE b15776 (a char(4294967296));
+ERROR 42000: Display width out of range for column 'a' (max = 4294967295)
+CREATE TABLE b15776 (a year(4294967295));
+INSERT INTO b15776 VALUES (42);
+SELECT * FROM b15776;
+a
+2042
+DROP TABLE b15776;
+CREATE TABLE b15776 (a year(4294967296));
+ERROR 42000: Display width out of range for column 'a' (max = 4294967295)
+CREATE TABLE b15776 (a year(0));
+DROP TABLE b15776;
+CREATE TABLE b15776 (a year(-2));
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-2))' at line 1
+CREATE TABLE b15776 (a timestamp(4294967294));
+Warnings:
+Warning	1287	'TIMESTAMP(4294967294)' is deprecated; use 'TIMESTAMP' instead
+DROP TABLE b15776;
+CREATE TABLE b15776 (a timestamp(4294967295));
+ERROR 42000: Display width out of range for column 'a' (max = 255)
+CREATE TABLE b15776 (a timestamp(4294967296));
+ERROR 42000: Display width out of range for column 'a' (max = 4294967295)
+CREATE TABLE b15776 (a timestamp(-2));
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-2))' at line 1
+CREATE TABLE b15776 (a int(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+ERROR 42000: Display width out of range for column 'a' (max = 4294967295)
+CREATE TABLE b15776 (a char(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+ERROR 42000: Display width out of range for column 'a' (max = 4294967295)
+CREATE TABLE b15776 (a year(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+ERROR 42000: Display width out of range for column 'a' (max = 4294967295)
+CREATE TABLE b15776 (a timestamp(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+ERROR 42000: Display width out of range for column 'a' (max = 4294967295)
+CREATE TABLE b15776 select cast(null as char(4294967295));
+show columns from b15776;
+Field	Type	Null	Key	Default	Extra
+cast(null as char(4294967295))	char(0)	YES		NULL	
+drop table b15776;
+CREATE TABLE b15776 select cast(null as nchar(4294967295));
+show columns from b15776;
+Field	Type	Null	Key	Default	Extra
+cast(null as nchar(4294967295))	char(0)	YES		NULL	
+drop table b15776;
+CREATE TABLE b15776 select cast(null as binary(4294967295));
+show columns from b15776;
+Field	Type	Null	Key	Default	Extra
+cast(null as binary(4294967295))	binary(0)	YES		NULL	
+drop table b15776;
+explain select cast(1 as char(4294967295));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+explain select cast(1 as nchar(4294967295));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+explain select cast(1 as binary(4294967295));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+explain select cast(1 as char(4294967296));
+ERROR 42000: Display width out of range for column 'cast as char' (max = 4294967295)
+explain select cast(1 as nchar(4294967296));
+ERROR 42000: Display width out of range for column 'cast as char' (max = 4294967295)
+explain select cast(1 as binary(4294967296));
+ERROR 42000: Display width out of range for column 'cast as char' (max = 4294967295)
+explain select cast(1 as decimal(-1));
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-1))' at line 1
+explain select cast(1 as decimal(64, 30));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+explain select cast(1 as decimal(64, 999999999999999999999999999999));
+Got one of the listed errors
+explain select cast(1 as decimal(4294967296));
+Got one of the listed errors
+explain select cast(1 as decimal(999999999999999999999999999999999999));
+Got one of the listed errors
+explain select convert(1, char(4294967295));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+explain select convert(1, char(4294967296));
+ERROR 42000: Display width out of range for column 'cast as char' (max = 4294967295)
+explain select convert(1, char(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+ERROR 42000: Display width out of range for column 'cast as char' (max = 4294967295)
+explain select convert(1, nchar(4294967295));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+explain select convert(1, nchar(4294967296));
+ERROR 42000: Display width out of range for column 'cast as char' (max = 4294967295)
+explain select convert(1, nchar(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+ERROR 42000: Display width out of range for column 'cast as char' (max = 4294967295)
+explain select convert(1, binary(4294967295));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+explain select convert(1, binary(4294967296));
+ERROR 42000: Display width out of range for column 'cast as char' (max = 4294967295)
+explain select convert(1, binary(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+ERROR 42000: Display width out of range for column 'cast as char' (max = 4294967295)
 End of 5.0 tests
diff --git a/mysql-test/t/bdb_notembedded.test b/mysql-test/t/bdb_notembedded.test
new file mode 100644
index 00000000000..24e64ebbfb2
--- /dev/null
+++ b/mysql-test/t/bdb_notembedded.test
@@ -0,0 +1,38 @@
+-- source include/not_embedded.inc
+-- source include/have_bdb.inc
+
+#
+# Bug #16206: Superfluous COMMIT event in binlog when updating BDB in autocommit mode
+#
+set autocommit=1;
+
+let $VERSION=`select version()`;
+
+reset master;
+create table bug16206 (a int);
+insert into bug16206 values(1);
+start transaction;
+insert into bug16206 values(2);
+commit;
+--replace_result $VERSION VERSION
+--replace_column 1 f 2 n 5 n
+show binlog events;
+drop table bug16206;
+
+reset master;
+create table bug16206 (a int) engine=         bdb;
+insert into bug16206 values(0);
+insert into bug16206 values(1);
+start transaction;
+insert into bug16206 values(2);
+commit;
+insert into bug16206 values(3);
+--replace_result $VERSION VERSION
+--replace_column 1 f 2 n 5 n
+show binlog events;
+drop table bug16206;
+
+set autocommit=0;
+
+
+--echo End of 5.0 tests
diff --git a/mysql-test/t/type_blob.test b/mysql-test/t/type_blob.test
index b6febf8e76d..1bede8ff6c4 100644
--- a/mysql-test/t/type_blob.test
+++ b/mysql-test/t/type_blob.test
@@ -436,4 +436,168 @@ set @@sql_mode='TRADITIONAL';
 create table t1 (a text default '');
 set @@sql_mode='';
 
+#
+# Bug#15776: 32-bit signed int used for length of blob
+# """LONGBLOB:  A BLOB column with a maximum length of 4,294,967,295 or 4GB."""
+#
+# Conditions should be in this order:
+# A size is not in the allowed bounds.
+# If the type is char-ish AND size is within the max blob size:
+#   raise ER_TOO_BIG_FIELDLENGTH  (suggest using BLOB)
+# If size is too small:
+#   raise ER_PARSE_ERROR
+# raise ER_TOO_BIG_DISPLAYWIDTH
+
+# BLOB and TEXT types
+--disable_warnings
+drop table if exists b15776;
+--enable_warnings
+create table b15776 (data blob(2147483647));
+drop table b15776;
+--error ER_PARSE_ERROR
+create table b15776 (data blob(-1));
+create table b15776 (data blob(2147483648));
+drop table b15776;
+create table b15776 (data blob(4294967294));
+drop table b15776;
+create table b15776 (data blob(4294967295));
+drop table b15776;
+--error ER_TOO_BIG_DISPLAYWIDTH
+create table b15776 (data blob(4294967296));
+
+CREATE TABLE b15776 (a blob(2147483647), b blob(2147483648), c blob(4294967295), a1 text(2147483647), b1 text(2147483648), c1 text(4294967295) );
+show columns from b15776;
+drop table b15776;
+
+--error ER_TOO_BIG_DISPLAYWIDTH
+CREATE TABLE b15776 (a blob(4294967296));
+--error ER_TOO_BIG_DISPLAYWIDTH
+CREATE TABLE b15776 (a text(4294967296));
+--error ER_TOO_BIG_DISPLAYWIDTH
+CREATE TABLE b15776 (a blob(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+--error ER_TOO_BIG_DISPLAYWIDTH
+CREATE TABLE b15776 (a text(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+
+# Int types
+# "Another extension is supported by MySQL for optionally specifying the
+# display width of integer data types in parentheses following the base keyword
+# for the type (for example, INT(4)). This optional display width is used to
+# display integer values having a width less than the width specified for the
+# column by left-padding them with spaces."   § Numeric Types
+CREATE TABLE b15776 (a int(0)); # 0 is special case, means default size
+INSERT INTO b15776 values (NULL), (1), (42), (654);
+SELECT * from b15776 ORDER BY a;
+DROP TABLE b15776;
+--error ER_PARSE_ERROR
+CREATE TABLE b15776 (a int(-1));
+CREATE TABLE b15776 (a int(255));
+DROP TABLE b15776;
+--error ER_TOO_BIG_DISPLAYWIDTH
+CREATE TABLE b15776 (a int(256));
+--error ER_PARSE_ERROR
+CREATE TABLE b15776 (data blob(-1));
+
+# Char types
+# Recommend BLOB
+--error ER_TOO_BIG_FIELDLENGTH
+CREATE TABLE b15776 (a char(2147483647));
+--error ER_TOO_BIG_FIELDLENGTH
+CREATE TABLE b15776 (a char(2147483648));
+--error ER_TOO_BIG_FIELDLENGTH
+CREATE TABLE b15776 (a char(4294967295));
+# Even BLOB won't hold
+--error ER_TOO_BIG_DISPLAYWIDTH
+CREATE TABLE b15776 (a char(4294967296));
+
+
+# Other numeric-ish types
+## For year, widths not "2" or "4" are silently rewritten to "4".  But
+## When we complain about it, we say that the max is 255.  We may be 
+## talking about different things.  It's confusing.
+CREATE TABLE b15776 (a year(4294967295));
+INSERT INTO b15776 VALUES (42);
+SELECT * FROM b15776;
+DROP TABLE b15776;
+--error ER_TOO_BIG_DISPLAYWIDTH
+CREATE TABLE b15776 (a year(4294967296));
+CREATE TABLE b15776 (a year(0));  # 0 is special case, means default size
+DROP TABLE b15776;
+--error ER_PARSE_ERROR
+CREATE TABLE b15776 (a year(-2));
+
+## For timestamp, we silently rewrite widths to 14 or 19.
+CREATE TABLE b15776 (a timestamp(4294967294));
+DROP TABLE b15776;
+--error ER_TOO_BIG_DISPLAYWIDTH
+CREATE TABLE b15776 (a timestamp(4294967295));
+--error ER_TOO_BIG_DISPLAYWIDTH
+CREATE TABLE b15776 (a timestamp(4294967296));
+--error ER_PARSE_ERROR
+CREATE TABLE b15776 (a timestamp(-2));
+
+
+# We've already tested the case, but this should visually show that 
+# widths that are too large to be interpreted cause DISPLAYWIDTH errors.
+--error ER_TOO_BIG_DISPLAYWIDTH
+CREATE TABLE b15776 (a int(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+--error ER_TOO_BIG_DISPLAYWIDTH
+CREATE TABLE b15776 (a char(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+--error ER_TOO_BIG_DISPLAYWIDTH
+CREATE TABLE b15776 (a year(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+--error ER_TOO_BIG_DISPLAYWIDTH
+CREATE TABLE b15776 (a timestamp(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+
+## Do not select, too much memory needed.
+CREATE TABLE b15776 select cast(null as char(4294967295));
+show columns from b15776;
+drop table b15776;
+CREATE TABLE b15776 select cast(null as nchar(4294967295));
+show columns from b15776;
+drop table b15776;
+CREATE TABLE b15776 select cast(null as binary(4294967295));
+show columns from b15776;
+drop table b15776;
+
+explain select cast(1 as char(4294967295));
+explain select cast(1 as nchar(4294967295));
+explain select cast(1 as binary(4294967295));
+
+--error ER_TOO_BIG_DISPLAYWIDTH
+explain select cast(1 as char(4294967296));
+--error ER_TOO_BIG_DISPLAYWIDTH
+explain select cast(1 as nchar(4294967296));
+--error ER_TOO_BIG_DISPLAYWIDTH
+explain select cast(1 as binary(4294967296));
+
+--error ER_PARSE_ERROR
+explain select cast(1 as decimal(-1));
+explain select cast(1 as decimal(64, 30));
+# It's not as important which errors are raised for these, since the 
+# limit is nowhere near 2**32.  We may fix these eventually to take
+# 4294967295 and still reject it because it's greater than 64 or 30, 
+# but that's not a high priority and the parser needn't worry about 
+# such a weird case.
+--error ER_TOO_BIG_SCALE,ER_PARSE_ERROR
+explain select cast(1 as decimal(64, 999999999999999999999999999999));
+--error ER_TOO_BIG_PRECISION,ER_PARSE_ERROR
+explain select cast(1 as decimal(4294967296));
+--error ER_TOO_BIG_PRECISION,ER_PARSE_ERROR
+explain select cast(1 as decimal(999999999999999999999999999999999999));
+
+explain select convert(1, char(4294967295));
+--error ER_TOO_BIG_DISPLAYWIDTH
+explain select convert(1, char(4294967296));
+--error ER_TOO_BIG_DISPLAYWIDTH
+explain select convert(1, char(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+explain select convert(1, nchar(4294967295));
+--error ER_TOO_BIG_DISPLAYWIDTH
+explain select convert(1, nchar(4294967296));
+--error ER_TOO_BIG_DISPLAYWIDTH
+explain select convert(1, nchar(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+explain select convert(1, binary(4294967295));
+--error ER_TOO_BIG_DISPLAYWIDTH
+explain select convert(1, binary(4294967296));
+--error ER_TOO_BIG_DISPLAYWIDTH
+explain select convert(1, binary(999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999));
+
 --echo End of 5.0 tests
diff --git a/sql/field.cc b/sql/field.cc
index 3213f84ee3e..a7a76d6c950 100644
--- a/sql/field.cc
+++ b/sql/field.cc
@@ -8772,8 +8772,20 @@ bool Create_field::init(THD *thd, char *fld_name, enum_field_types fld_type,
       (fld_type_modifier & NOT_NULL_FLAG) && fld_type != MYSQL_TYPE_TIMESTAMP)
     flags|= NO_DEFAULT_VALUE_FLAG;
 
-  if (fld_length && !(length= (uint) atoi(fld_length)))
-    fld_length= 0; /* purecov: inspected */
+  if (fld_length != 0)
+  {
+    errno= 0;
+    length= strtoul(fld_length, NULL, 10);
+    if (errno != 0)
+    {
+      my_error(ER_TOO_BIG_DISPLAYWIDTH, MYF(0), fld_name, MAX_FIELD_BLOBLENGTH);
+      DBUG_RETURN(TRUE);
+    }
+
+    if (length == 0)
+      fld_length= 0; /* purecov: inspected */
+  }
+
   sign_len= fld_type_modifier & UNSIGNED_FLAG ? 0 : 1;
 
   switch (fld_type) {
diff --git a/sql/item_create.cc b/sql/item_create.cc
index fa15b992e5c..017418d55a1 100644
--- a/sql/item_create.cc
+++ b/sql/item_create.cc
@@ -5031,8 +5031,23 @@ create_func_cast(THD *thd, Item *a, Cast_target cast_type,
     break;
   case ITEM_CAST_DECIMAL:
   {
-    len= c_len ? atoi(c_len) : 0;
-    dec= c_dec ? atoi(c_dec) : 0;
+    if (c_dec == NULL)
+    {
+      dec= 0;
+    }
+    else
+    {
+      ulong decoded_size;
+      errno= 0;
+      decoded_size= strtoul(c_dec, NULL, 10);
+      if ((errno != 0) || (decoded_size > UINT_MAX))
+      {
+        my_error(ER_TOO_BIG_SCALE, MYF(0), c_dec, a->name,
+                 DECIMAL_MAX_SCALE);
+        return NULL;
+      }
+      dec= decoded_size;
+    }
     my_decimal_trim(&len, &dec);
     if (len < dec)
     {
@@ -5057,7 +5072,22 @@ create_func_cast(THD *thd, Item *a, Cast_target cast_type,
   case ITEM_CAST_CHAR:
   {
     CHARSET_INFO *real_cs= (cs ? cs : thd->variables.collation_connection);
-    len= c_len ? atoi(c_len) : -1;
+    if (c_len == NULL)
+    {
+      len= LL(-1);
+    }
+    else
+    {
+      ulong decoded_size;
+      errno= 0;
+      decoded_size= strtoul(c_len, NULL, 10);
+      if (errno != 0)
+      {
+        my_error(ER_TOO_BIG_DISPLAYWIDTH, MYF(0), "cast as char", MAX_FIELD_BLOBLENGTH);
+        return NULL;
+      }
+      len= decoded_size;
+    }
     res= new (thd->mem_root) Item_char_typecast(a, len, real_cs);
     break;
   }
diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy
index 591f2c46d4d..b7bfd05a9dc 100644
--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -1244,7 +1244,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 	single_multi table_wild_list table_wild_one opt_wild
 	union_clause union_list
 	precision subselect_start opt_and charset
-	subselect_end select_var_list select_var_list_init help opt_len
+	subselect_end select_var_list select_var_list_init help opt_field_length field_length
 	opt_extended_describe
         prepare prepare_src execute deallocate
 	statement sp_suid
@@ -4574,45 +4574,38 @@ field_spec:
 	};
 
 type:
-	int_type opt_len field_options	{ $$=$1; }
+	int_type opt_field_length field_options	{ $$=$1; }
 	| real_type opt_precision field_options { $$=$1; }
 	| FLOAT_SYM float_options field_options { $$=MYSQL_TYPE_FLOAT; }
 	| BIT_SYM			{ Lex->length= (char*) "1";
 					  $$=MYSQL_TYPE_BIT; }
-	| BIT_SYM '(' NUM ')'		{ Lex->length= $3.str;
-					  $$=MYSQL_TYPE_BIT; }
+	| BIT_SYM field_length		{ $$=MYSQL_TYPE_BIT; }
 	| BOOL_SYM			{ Lex->length=(char*) "1";
 					  $$=MYSQL_TYPE_TINY; }
 	| BOOLEAN_SYM			{ Lex->length=(char*) "1";
 					  $$=MYSQL_TYPE_TINY; }
-	| char '(' NUM ')' opt_binary	{ Lex->length=$3.str;
-					  $$=MYSQL_TYPE_STRING; }
+	| char field_length opt_binary	{ $$=MYSQL_TYPE_STRING; }
 	| char opt_binary		{ Lex->length=(char*) "1";
 					  $$=MYSQL_TYPE_STRING; }
-	| nchar '(' NUM ')' opt_bin_mod	{ Lex->length=$3.str;
-					  $$=MYSQL_TYPE_STRING;
+	| nchar field_length opt_bin_mod { $$=MYSQL_TYPE_STRING;
 					  Lex->charset=national_charset_info; }
 	| nchar opt_bin_mod		{ Lex->length=(char*) "1";
 					  $$=MYSQL_TYPE_STRING;
 					  Lex->charset=national_charset_info; }
-	| BINARY '(' NUM ')'		{ Lex->length=$3.str;
-					  Lex->charset=&my_charset_bin;
+	| BINARY field_length		{ Lex->charset=&my_charset_bin;
 					  $$=MYSQL_TYPE_STRING; }
 	| BINARY			{ Lex->length= (char*) "1";
 					  Lex->charset=&my_charset_bin;
 					  $$=MYSQL_TYPE_STRING; }
-	| varchar '(' NUM ')' opt_binary { Lex->length=$3.str;
-					  $$= MYSQL_TYPE_VARCHAR; }
-	| nvarchar '(' NUM ')' opt_bin_mod { Lex->length=$3.str;
-					  $$= MYSQL_TYPE_VARCHAR;
+	| varchar field_length opt_binary { $$= MYSQL_TYPE_VARCHAR; }
+	| nvarchar field_length opt_bin_mod { $$= MYSQL_TYPE_VARCHAR;
 					  Lex->charset=national_charset_info; }
-	| VARBINARY '(' NUM ')' 	{ Lex->length=$3.str;
-					  Lex->charset=&my_charset_bin;
+	| VARBINARY field_length 	{ Lex->charset=&my_charset_bin;
 					  $$= MYSQL_TYPE_VARCHAR; }
-	| YEAR_SYM opt_len field_options { $$=MYSQL_TYPE_YEAR; }
+	| YEAR_SYM opt_field_length field_options { $$=MYSQL_TYPE_YEAR; }
 	| DATE_SYM			{ $$=MYSQL_TYPE_DATE; }
 	| TIME_SYM			{ $$=MYSQL_TYPE_TIME; }
-	| TIMESTAMP opt_len
+	| TIMESTAMP opt_field_length
 	  {
 	    if (YYTHD->variables.sql_mode & MODE_MAXDB)
 	      $$=MYSQL_TYPE_DATETIME;
@@ -4628,7 +4621,7 @@ type:
 	| DATETIME			{ $$=MYSQL_TYPE_DATETIME; }
 	| TINYBLOB			{ Lex->charset=&my_charset_bin;
 					  $$=MYSQL_TYPE_TINY_BLOB; }
-	| BLOB_SYM opt_len		{ Lex->charset=&my_charset_bin;
+	| BLOB_SYM opt_field_length		{ Lex->charset=&my_charset_bin;
 					  $$=MYSQL_TYPE_BLOB; }
 	| spatial_type
           {
@@ -4650,7 +4643,7 @@ type:
 					  $$=MYSQL_TYPE_MEDIUM_BLOB; }
 	| LONG_SYM varchar opt_binary	{ $$=MYSQL_TYPE_MEDIUM_BLOB; }
 	| TINYTEXT opt_binary		{ $$=MYSQL_TYPE_TINY_BLOB; }
-	| TEXT_SYM opt_len opt_binary	{ $$=MYSQL_TYPE_BLOB; }
+	| TEXT_SYM opt_field_length opt_binary	{ $$=MYSQL_TYPE_BLOB; }
 	| MEDIUMTEXT opt_binary		{ $$=MYSQL_TYPE_MEDIUM_BLOB; }
 	| LONGTEXT opt_binary		{ $$=MYSQL_TYPE_LONG_BLOB; }
 	| DECIMAL_SYM float_options field_options
@@ -4723,7 +4716,7 @@ real_type:
 
 float_options:
         /* empty */		{ Lex->dec=Lex->length= (char*)0; }
-        | '(' NUM ')'		{ Lex->length=$2.str; Lex->dec= (char*)0; }
+        | field_length		{ Lex->dec= (char*)0; }
 	| precision		{};
 
 precision:
@@ -4746,9 +4739,15 @@ field_option:
 	| UNSIGNED	{ Lex->type|= UNSIGNED_FLAG;}
 	| ZEROFILL	{ Lex->type|= UNSIGNED_FLAG | ZEROFILL_FLAG; };
 
-opt_len:
-	/* empty */	{ Lex->length=(char*) 0; } /* use default length */
-	| '(' NUM ')'	{ Lex->length= $2.str; };
+opt_field_length:
+        /* empty */             { Lex->length=(char*) NULL; } /* use default length */
+        | field_length          {};
+
+field_length:
+        '(' LONG_NUM ')'      { Lex->length= $2.str; }
+        | '(' ULONGLONG_NUM ')' { Lex->length= $2.str; }
+        | '(' DECIMAL_NUM ')'   { Lex->length= $2.str; }
+        | '(' NUM ')'           { Lex->length= $2.str; };
 
 opt_precision:
 	/* empty */	{}
@@ -7176,9 +7175,9 @@ in_sum_expr:
 	};
 
 cast_type:
-        BINARY opt_len		{ $$=ITEM_CAST_CHAR; Lex->charset= &my_charset_bin; Lex->dec= 0; }
-        | CHAR_SYM opt_len opt_binary	{ $$=ITEM_CAST_CHAR; Lex->dec= 0; }
-	| NCHAR_SYM opt_len	{ $$=ITEM_CAST_CHAR; Lex->charset= national_charset_info; Lex->dec=0; }
+        BINARY opt_field_length		{ $$=ITEM_CAST_CHAR; Lex->charset= &my_charset_bin; Lex->dec= 0; }
+        | CHAR_SYM opt_field_length opt_binary	{ $$=ITEM_CAST_CHAR; Lex->dec= 0; }
+	| NCHAR_SYM opt_field_length	{ $$=ITEM_CAST_CHAR; Lex->charset= national_charset_info; Lex->dec=0; }
         | SIGNED_SYM		{ $$=ITEM_CAST_SIGNED_INT; Lex->charset= NULL; Lex->dec=Lex->length= (char*)0; }
         | SIGNED_SYM INT_SYM	{ $$=ITEM_CAST_SIGNED_INT; Lex->charset= NULL; Lex->dec=Lex->length= (char*)0; }
         | UNSIGNED		{ $$=ITEM_CAST_UNSIGNED_INT; Lex->charset= NULL; Lex->dec=Lex->length= (char*)0; }
diff --git a/sql/unireg.h b/sql/unireg.h
index 6c26f30f116..87e0e4ac8f8 100644
--- a/sql/unireg.h
+++ b/sql/unireg.h
@@ -63,6 +63,7 @@
 #define MAX_MBWIDTH		3		/* Max multibyte sequence */
 #define MAX_FIELD_CHARLENGTH	255
 #define MAX_FIELD_VARCHARLENGTH	65535
+#define MAX_FIELD_BLOBLENGTH    UINT_MAX
 #define CONVERT_IF_BIGGER_TO_BLOB 512		/* Used for CREATE ... SELECT */
 
 /* Max column width +1 */