|The jOOQ User Manual. Multiple Pages : SQL building : The DSLContext class : Custom Settings : Updatable Primary Keys||previous : next|
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
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 from
Settings settings = new Settings() .withUpdatablePrimaryKeys(true); // Defaults to false
<settings xmlns="http://www.jooq.org/xsd/jooq-runtime-3.2.0.xsd"> <updatablePrimaryKeys>true</updatablePrimaryKeys> </settings>