Available in versions: Dev (3.20) | Latest (3.19) | 3.18 | 3.17 | 3.16 | 3.15 | 3.14 | 3.13 | 3.12 | 3.11 | 3.10
Updatable Primary Keys
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
In most database design guidelines, primary key values are expected to never change - an assumption that is essential to a normalised database.
As always, there are exceptions to these rules, and users may wish to allow for updatable primary key values in the updatable records feature (note: any value can always be updated through ordinary update statements). An example:
AuthorRecord author = DSL.using(configuration) // This configuration will be attached to any record produced by the below query. .selectFrom(AUTHOR) .where(AUTHOR.ID.eq(1)) .fetchOne(); author.setId(2); author.store(); // The behaviour of this store call is governed by the updatablePrimaryKeys flag
The above store call depends on the value of the updatablePrimaryKeys
flag:
-
false
(the default): Since immutability of primary keys is assumed, the store call will create a new record (a copy) with the new primary key value. -
true
: Since mutablity of primary keys is allowed, the store call will change the primary key value from1
to2
.
Example configuration
Settings settings = new Settings() .withUpdatablePrimaryKeys(true); // Defaults to false
Feedback
Do you have any feedback about this page? We'd love to hear it!