mysql procedure to update numeric reference in previous rows when one is updated

Posted by markcial on Stack Overflow See other posts from Stack Overflow or by markcial
Published on 2010-03-16T11:41:17Z Indexed on 2010/03/16 11:46 UTC
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Filed under:

mysql

|

stored-procedures

|

sql

There's a table like this one

 ______________________
| id  |  title | order |
|----------------------|
|  1  |  test1 |   1   |
|-----|--------|-------|
|  2  |  test2 |   2   |
|-----|--------|-------|
|  3  |  test3 |   3   |
|-----|--------|-------|
|  4  |  test4 |   4   |
'----------------------'

when i introduce in my mysql shell a single update to a row

 $sql> UPDATE `table` SET order=1 WHERE id=3;

And then procedure or method resamples order column in the before update lower values to get its order renewed like this

 ______________________
| id  |  title | order |
|----------------------|
|  1  |  test1 |   2   |
|-----|--------|-------|
|  2  |  test2 |   3   |
|-----|--------|-------|
|  3  |  test3 |   1   |
|-----|--------|-------|
|  4  |  test4 |   4   |
'----------------------'

Any help would be appreciated, thanks!

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