在现有的MySQL数据库上填充自动增量类型ID？

Question

I have an existing MySQL Database that is accessed with PHP. There is about 15,000 records and I need to quickly go in and update a new Design Number column that was just added. I need to iterate the whole dataset and set the value for the first record as 00001, the next 00002, and keep incrementing by one until I get to the end. I have code in place to make sure all new records will have this applied but I need to update the existing 15,000 records quickly.

Is there a quick way to do this in MySQL without building a PHP script to quickly populate all the old records?

Keep in mind this is not a regular auto increment filed in MySQL but instead a custom implementation to mimic that functionality in SugarCRM

I need to iterate this table...

SELECT designnumber_c FROM d1_designs_cstm

Then update this designnumber_c column and increment by +1 for each record while also maintaining a 00001 0 padding

Answer 1

Something like this:

mysql> SET @id := 0;
mysql> UPDATE d1_designs_cstm SET designnumber_c = LPAD(@id:=@id+1, 6, '0');

Answer 2

To add more on Answer by @Patrick Savalle

You can have the new column definition as

designnumber_c int(6) unsigned zerofill not null

with this:

1. You need not explicitly pad zeros to it.
2. You can select, update, delete the column by actual value than by zero padded value.

Example :

mysql> SET @id := 0;
mysql> UPDATE d1_designs_cstm 
    ->   SET designnumber_c = @id:=@id+1;