What does it mean declaring a table unsigned?
An example is a s below:
id smallint unsigned not null auto_increment
Hi Yemi,
It means the variable contains only positive values - otherwise one
bit would be used to denote whether it's positive or negative. From
the documentation:
SMALLINT[(M)] [UNSIGNED] [ZEROFILL]
A small integer. The signed range is -32768 to 32767. The unsigned
range is 0 to 65535.
Jos
)| NO | | | |
| MESSAGEUUID | char(33)| YES | MUL | | |
| SMSSEQ| int(10) unsigned| NO | PRI | 0 | |
| DESTTERMID| varchar(80) | YES | | | |
| MSGOVER | smallint(6) | YES
shifting and masking
with integer types so I am trying to cast BLOB as UNSIGNED, but without
luck (the data I SUBSTR out will fit into a BIGINT UNSIGNED).
Here is a precedure I wrote to show the problem:
create procedure test3 ()
BEGIN
DECLARE fdata BLOB;
DECLARE foffset INT
Hello.
That seems like a bug:
http://bugs.mysql.com/bug.php?id=14543
Marko Domanovic wrote:
mysql 5.0.15-standard
UPDATE table SET fieldname = fieldname-1
when the fieldname is 0 gives me 4294967295
fieldname is integer(10) unsigned...
maybe it would be more logical
Maybe it is because I am a programmer, but (unsigned) 0 - 1 = 4294967295.
What's the big deal?
Gleb Paharenko wrote:
Hello.
That seems like a bug:
http://bugs.mysql.com/bug.php?id=14543
Marko Domanovic wrote:
mysql 5.0.15-standard
UPDATE table SET fieldname = fieldname-1
mysql 5.0.15-standard
UPDATE table SET fieldname = fieldname-1
when the fieldname is 0 gives me 4294967295
fieldname is integer(10) unsigned...
maybe it would be more logical the expression to evaluate as 0, insted 2^32
..
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I noticed rather interesting thing... If you deduct 1 from the 0 which is
stored in integer unsigned field, you get 2^32, not 0. I think that's how
things are not working with version 4, and want to ask is this behavior bug
or feature in mysql version 5, and is it customizable?
Greetings
Hello.
On both 4.1.16 and 5.0.17 I've got the same results, however not 2^32,
but 18446744073709551615. 4.0 is deprecated and its results could be
different. Please provide exact SQL statement which you're using if you
still think that MySQL behaves weirdly with unsigned integers
an auto_increment column hits its
maximum value it will 'roll over' to the lowest value that column will store
(i.e. 0 for an unsigned int).
Probably if you add 1 to 2^32 (or 2^16 for a SMALLINT, for example) you will
get 0.
BTW, 18446744073709551615 is the maximum value for a BIGINT (64 bit number
PROTECTED]
To: [EMAIL PROTECTED]
Hello,
[...]
The problem comes in with fields of type int(11) unsigned these are
obviously interpreted as Longs on call to resultSet.getObject() which is
fine, the problem I am having is that calls to getLong() and getInt()
return different looking values
Bill,
Thank you for this. While that is true, the problem is that the number
in the database is actually 2 and not 4294967298. It seems the
connector/j is sticking that highest bit in there itself, or misbehaving
in some other way.
Apparently it has been fixed just hasn't been released
Jacob S. Barrett wrote:
I have a column of type UNSIGNED INT which holds a 32bit counter. When the
value of the field exceeds 2147483647 (signed max) the value of MAX on the
column returns a negative number.
Possibly this bug, fixed in 4.1.12?
http://bugs.mysql.com/bug.php?id=9298
--
Keith
On Wednesday 06 July 2005 11:42 am, Keith Ivey [EMAIL PROTECTED] wrote:
Jacob S. Barrett wrote:
I have a column of type UNSIGNED INT which holds a 32bit counter. When
the value of the field exceeds 2147483647 (signed max) the value of MAX
on the column returns a negative number.
Possibly
I have a column of type UNSIGNED INT which holds a 32bit counter. When the
value of the field exceeds 2147483647 (signed max) the value of MAX on the
column returns a negative number. If I convert the column to BIGINT the
correct MAX is returned. Is this expected behavior, am I doing
At 12:17 -0700 7/5/05, Jacob S. Barrett wrote:
I have a column of type UNSIGNED INT which holds a 32bit counter. When the
value of the field exceeds 2147483647 (signed max) the value of MAX on the
column returns a negative number. If I convert the column to BIGINT the
correct MAX is returned
Hello.
The behaviour of UNSIGNED BIGINT was correct on my Win2k Professional.
Do you use a mysql command line client or other client software?
mysql create table bu(a bigint unsigned);
Query OK, 0 rows affected (0.20 sec)
mysql insert into bu values('18446744073709551615');
Query OK
Hi
I am testing against MySQL 4.1 current release on Windows and there seems to
be a fault with unsigned bigint datatypes.
Using a BIGINT UNSIGNED datatype, the maximum value that will be accepted on
insert query is 9223372036854775807 , which is actually the published
maximum for signed Bigints
Hello.
I've submitted a bug http://bugs.mysql.com/7036.
Robin Bryce [EMAIL PROTECTED] wrote:
Hi,
I'm having trouble converting to and from strings that represent
unsigned BIGINT's.
My server is MySQL 4.1.7-standard and
the following selects were entered at the prompt
Ah, Excelent. Thanks for looking at this. The use context that exposed
this was using uuids as primary keys. I was breaking the result of
uuid() into two parts, and then storing into a pair of bigint unsigned
fields that formed a composite primary key:
CREATE TABLE `test`.`uuidkeys` (
`uuidlo
Hi,
I'm having trouble converting to and from strings that represent
unsigned BIGINT's.
My server is MySQL 4.1.7-standard and
the following selects were entered at the prompt of my client with
version mysql Ver 14.7 Distrib 4.1.7, for pc-linux (i686).
select cast(1-2, unsigned);
gives
WHERE CAST(
t1.id AS UNSIGNED ) = t2.id.
If anyone knows of a more reliable or elegant method for joining the
tables based on these fields, any comments would be appreciated.
Wes
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On Mon, 2003-11-17 at 13:42, Harald Fernengel wrote:
Hello John,
... We had some reports
about uint-int problems with MySQL, but I believe we fixed them all in Qt
3.3, so there should not be any problems.
Best regards,
Harald
I can confirm that the problem is fixed in 3.3. Thanks -
It seems that 4294967295, the max value for an unsigned int, is not large
enough. Is there an issue with using bigint or storing the value in char
format?
-Original Message-
From: John A. Sullivan III [mailto:[EMAIL PROTECTED]
Sent: Monday, November 17, 2003 7:18 AM
To: [EMAIL PROTECTED
I'm trying to write a Delphi program that accesses a MySQL database via
MyODBC. It's going pretty well except for a sticky problem I'm having with
an unsigned integer column.
I have a column named 'IP', type unsigned integer, that will hold IP
addresses. However, Delphi seems to assume
Description:
When try to use enum ('a','b','unsigned') MySQL understands it as enum ('a','b','')
unsigned.
How-To-Repeat:
Something like:
alter table test change en en enum ('a','unsigned');
Fix:
Submitter-Id: submitter ID
Originator:Michal Cihar
Organization:
MySQL support: none
Synopsis
signed integers,
and inet_aton uses unsigned integers. If all my IP addresses were below
127.255.255.255, this would be fine :)
Documentation suggests that converting signed to unsigned (and vice
versa) is available in MySQL 4.0.2 through the CAST() function, but I'm
running 3.23.54
Hi all,
I've tried the following SQL line in MySQL 4.05 for Windows and it told me
that there is an error starting from unsigned
mysql create table aaa(id int not null unsigned, name text);
Can you tell me why doesn't it work?
Thank you.
Teddy,
Teddy's Center: http://teddy.fcc.ro/
Email
try:
create table aaa(id int(5) unsigned not null, name text);
not sure why but unsigned needs to come before not null.
=C=
*
* Cal Evans
* The Virtual CIO
* http://www.calevans.com
*
-Original Message-
From: Octavian Rasnita [mailto:[EMAIL PROTECTED]]
Sent: Sunday, December 29, 2002
- Original Message -
From: Octavian Rasnita [EMAIL PROTECTED]
mysql create table aaa(id int not null unsigned, name text);
Can you tell me why doesn't it work?
You want:
create table aaa(id int unsigned not null, name text);
Your way doesn't work as 'unsigned' is a modification
On Sun, Dec 29, 2002 at 04:06:39PM +0200, Octavian Rasnita wrote:
Hi all,
I've tried the following SQL line in MySQL 4.05 for Windows and it told me
that there is an error starting from unsigned
mysql create table aaa(id int not null unsigned, name text);
Can you tell me why doesn't
Octavian Rasnita wrote:
Hi all,
I've tried the following SQL line in MySQL 4.05 for Windows and it told me
that there is an error starting from unsigned
mysql create table aaa(id int not null unsigned, name text);
Can you tell me why doesn't it work?
Sure ! Your syntax is wrong
On Sunday 29 December 2002 15:06, Octavian Rasnita wrote:
mysql create table aaa(id int not null unsigned, name text);
Can you tell me why doesn't it work?
null can't be signed or unsigned.
try int unsigned not null
Regards
Georg
filter: mysql, query
and some test data:
CREATE TABLE Leads (
DanPK mediumint(8) unsigned NOT NULL auto_increment,
MyStamp timestamp(14) NOT NULL,
LeadNo mediumint(9) unsigned NOT NULL default '0',
IssueDate date NOT NULL default '-00-00',
IssuedTo tinyint(3) unsigned NOT NULL default '0',
CompleteDate date
myself over the head
with a plank of hardwood.
Will Lotto
Systems Administrator
-Original Message-
From: Will Lotto [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, 2 July 2002 12:42 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Unsigned Int / Signed Int issue when using MyODBC2.5
G'day,
I've got a problem with the ODBC driver for MySQL, in that when I use an
SQL select statement on a field of type UNSIGNED INTEGER, the resulting
recordset in asp uses SIGNED INTEGER data types, so any data 2^31 is
dropped by asp.
The offending code is as follows:
Set
Hi All,
Using MySQL server version 3.23.49-nt I get strange results when running the
following very simple test. I am wondering if this is a bug, feature or
perhaps a standart SQL behaviour??
CREATE TABLE test(id BIGINT UNSIGNED);
CREATE INDEX test_idx on test(id);
INSERT INTO test VALUES (0
Hi.
What you observe is the fact that -1 will be converted to the format
of the index, else the index could not be used.
Converting -1 to an unsigned number give the biggest possible number
for the type in question (here BIGINT UNSIGNED). None of your numbers
is bigger than this, so you get
On Thursday, 16. May 2002 21:44, Benjamin Pflugmann wrote:
Hi.
What you observe is the fact that -1 will be converted to the format
of the index, else the index could not be used.
Converting -1 to an unsigned number give the biggest possible number
for the type in question (here BIGINT
Hi, I have a table in a MySQL database where some fields are declared as
unsigned. Example:
CREATE TABLE cities (
City_id SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
City_name VARCHAR(50) NOT NULL
}
My problem appears when inside a .xsql file (Oracle XDK), I try to do
FYI, concerning my previous email, it's solved. I upgraded the JDBC
drivers to the last ones and now it recognizes the unsigned data types.
Great! :-)
David
On Thu, 25 Apr 2002, David Collados Polidura wrote:
Hi, I have a table in a MySQL database where some fields are declared
At 3:10 + 3/14/02, Gary Griffiths (Citydesk) wrote:
Hi, sql,query
Could someone please explain in detail or point me to where the detail can
be explained in full the implications and benefits or otherwise of the
attribute UNSIGNED in a field definition.
It means the column cannot contain
Colin Faber writes:
Description:
When attempting to select a result set by subtracting the value
of an unsigned INT column against UNIX_TIMESTAMP() the result set
is invalid.
How-To-Repeat:
Test case:
[skip]
Thank you for your bug report.
I have been able
Hi!
Colin == Colin Faber [EMAIL PROTECTED] writes:
Description:
Colin When attempting to select a result set by subtracting the value
Colin of an unsigned INT column against UNIX_TIMESTAMP() the result set
Colin is invalid.
How-To-Repeat:
Colin Test case:
mysql create table t (ts int
Michael Widenius wrote:
Hi!
Colin == Colin Faber [EMAIL PROTECTED] writes:
Description:
Colin When attempting to select a result set by subtracting the value
Colin of an unsigned INT column against UNIX_TIMESTAMP() the result set
Colin is invalid.
How-To-Repeat:
Colin
Description:
When attempting to select a result set by subtracting the value
of an unsigned INT column against UNIX_TIMESTAMP() the result set
is invalid.
How-To-Repeat:
Test case:
mysql create table t (ts int unsigned not null); insert into t values
Hi there,
I grabbed the MySQL reference book and was doing some reading on the different Integer
types..
Something that I noticed was that you could also add an option to say if a Int was
unsigned ot signed..
Does it have any sence to use a signed int on a autoincrement table..?
E.g. When
On 13-Jul-01 David Bouw wrote:
snipage ahead
Something that I noticed was that you could also add an option to say if a
Int was unsigned ot signed..
Does it have any sence to use a signed int on a autoincrement table..?
E.g. When using a auto-increment correctly you will never need
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