Alter table on id only - php

Question

I'm trying to set the Auto Increment of my tables st_id to = 201406001
query:
ALTER TABLE
support_ticket AUTO_INCREMENT=201406001
When doing this it worked and now my "st_id" (AI, Primary key) is set to 201406001 just as I wanted.
When I ran that query it said it affected 4 rows which is right, because there were 4 rows in the table when I ran that query.
But now when I try and update the status of a specific column in one of those 4 rows, it will not update.
Is my ALTER TABLE query wrong?
I tried running the following query to only target the st_id like this, but gave me an error.
ALTER TABLE
support_ticket.st_id AUTO_INCREMENT=201406001
FROM
support_ticket
ERROR
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 'FROM
support_ticket' at line 3
So my question is, should I stick with my original query, as it did work, or should I try to get the 2nd query working?
Also, could running that 1st query be that be the reason I cannot update my column now?
This is my first time using ALTER TABLE so any help would be of use.
Here is my update code:
Form
<form method="POST" action="close.php" enctype="multipart/form-data">
<input type="hidden" name="st_id" value="<?php echo escape ($t->st_id); ?>">
<h3>Close this ticket...</h3>
<select name="status">
<option value="<?php echo escape($t->status); ?>">Current Status: OPEN</option>
<option value="0">CLOSE</option>
</select>
<input type="submit" value="CLOSE"><input type="button" value="Cancel" onclick="window.location = '/admin/maintenance/'">
</form>
Action script:
include($_SERVER['DOCUMENT_ROOT'] . "/core/init.php");
$st_id = $_POST['st_id'];
$status = $_POST['status'];
$updatestatus = DB::getInstance()->UPDATE('support_ticket', $st_id, array(
'status' => $status,
));
echo "The ticket was successfully closed.<br />
Solution to my UPDATE problem:
Finally got it to update by this:
$st_id = $_POST['st_id'];
$status = $_POST['status'];
$updatestatus = DB::getInstance()->query("UPDATE `support_ticket` SET `status` = $status WHERE `st_id` = $st_id");

Answer 1

It seems to trial to auto-increment according to year or month. You can use MySQL Custom AUTO_INCREMENT values as follows:
(read the article first)
I changed the function getNextCustomSeq the line:
SET #ret = (SELECT concat(sSeqGroup,'-',lpad(nLast_val,6,'0')));
to
SET #ret = (SELECT concat(sSeqGroup,lpad(nLast_val,3,'0')));
Then I create table and triggeras follows:
CREATE TABLE ticket(
id int not null primary key auto_increment,
autonum int not null
);
DELIMITER $$
CREATE TRIGGER ticket_autonums_bi BEFORE INSERT ON ticket
FOR each ROW
BEGIN
SET NEW.autonum = getNextCustomSeq(date_format(now(),'%Y%m'),date_format(now(),'%Y%m'));
END$$
delimiter ;
Note: The function date_format(now(),'%Y%m') will return current year and mont like "201406"
Now insert some values:
insert into ticket(id)
values (null),(null),(null),(null),(null),
(null),(null),(null),(null),(null);
Select the inserted data:
mysql> select * from ticket;
+----+-----------+
| id | autonum |
+----+-----------+
| 1 | 201406001 |
| 2 | 201406002 |
| 3 | 201406003 |
| 4 | 201406004 |
| 5 | 201406005 |
| 6 | 201406006 |
| 7 | 201406007 |
| 8 | 201406008 |
| 9 | 201406009 |
| 10 | 201406010 |
+----+-----------+
10 rows in set (0.00 sec)

Answer 2

ALTER TABLE ... AUTO_INCREMENT=201406001 only means that the next AI value generated will be that value. It doesn't change the id value in any of the current rows of data in the table.
The "affected rows" message meant that it performed a table copy as part of the ALTER TABLE. Some older versions of MySQL would naively copy all the rows in the table, even though you wouldn't think it had to to perform the metadata change.
So if you try to UPDATE ... WHERE id=201406001 it will not apply to your existing rows.

Answer 3

With ALTER you update your tabledescription (ie columnnames, values for autoincrement).
If you want to update the values of a table you have to use UPDATE. ie:
UPDATE support_ticket SET status = 'closed' WHERE id = 1234;
If you're new to SQL have a look at w3schools.com. they have some tutorials (http://www.w3schools.com/sql/sql_update.asp)