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MySql InnoDb auto-increment pre-fetching values

开发者 https://www.devze.com 2023-04-12 17:19 出处:网络
How do I get future keys from a Mysql InnoDb? Oracle and Postgres both have the concept of sequences and a nextval-function. Mysql seems to be a bit different.

How do I get future keys from a Mysql InnoDb?

Oracle and Postgres both have the concept of sequences and a nextval-function. Mysql seems to be a bit different.

Is there some easy sql statement to pull may开发者_Python百科be 1000 future keys for a certain auto-increment field, and be sure no other transaction can pull these values at the same time or any time in the future?


For InnoDb table you can do this:

  • Start a transaction.
  • Insert 1000 records.
  • Commit the transaction.

Oracle and Postgres both have the concept of sequences and a nextval-function. Mysql seems to be a bit different.

In MySQL you could do this to find next value -

SELECT MAX(id) + 1 FROM table_name;

But there is no guarantee that AUTO_INCREMENT works in the same way.

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