The document discusses MySQL replication and how updates and limits work in a master-slave replication setup. Specifically, it notes that updates on the master are replicated to slaves and the order of rows may change due to sorting from an ORDER BY clause or the automatic reordering of rows that occurs in B-tree indexes. It also mentions that the LIMIT clause only affects the results returned to the client and does not limit the number of rows updated on the master or replicated to slaves.

1. LIMIT
UPDATE
@yuya_takeyama
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2. MySQL5
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3. !!! !!!
UPDATE
LIMIT
ORDER BY
Master/Slave
=>
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4. Why?
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5. 2011 7 2

6. 1 Master N Slave
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7. 1 Master N Slave
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8. SQL
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9. 2011 7 2

10. @nippondanji
Art of MySQL Replication
http://www.slideshare.net/nippondanji/art-of-mysql-replication-4824469
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11. B-Tree
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12. ID
1 Richard 24
2 Tom 64
3 Aaron 23
4 Tony 12
5 Ritchie 33
6 Jimmy 47
7 Eric 53
8 James 5
9 Kirk 84
10 Lars 43
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13. ID
3 Aaron 23
7 Eric 53
8 James 5
6 Jimmy 47
9 Kirk 84
10 Lars 43
1 Richard 24
5 Ritchie 33
2 Tom 64
4 Tony 12
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14. 2011 7 2

15. 2011 7 2

16. RDBMS
->
->
MySQL
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17. ...
UPDATE
!!!
LIMIT
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