oracle - Incrementing a sequence by 1000 each persist of a new Entity -


we have jdbc legacy code converting jpa, used ids oracle using select business_object_seq.nextval dual; sequence specified create sequence business_object_seq increment 1000 start x; x being integer less 1000 matching node id of system.

ie node 3, calls next id 1003, 2003, 3003, etc

my converted entity follows

@entity @table(name="business_object") @sequencegenerator(name="business_object_seq", allocationsize = 1000)  public class businessobject implements serializable {      private int id;      @id     @generatedvalue(strategy=generationtype.sequence, generator="business_object_seq")     public int getid() {         return id;     }      public void setid(int id) {         this.id = id;     }      // other methods }

but entities(on node 3) created ids 3, 4, 5.

without creating custom sequence generator ( link -> customsequence) possible have sequencegenerator behave way?

cheers adam

if specify allocation size of 1000, telling jpa gets allocated 1000 numbers use every time gets sequence values. when gets value of 1003, thinks can use 1003-2002 before needs go database more values.

setting allocation size 1 cause go database each time needs number, , while less efficient doesn't allow preallocation, give behavior want. need ensure each node accesses sequence starts @ different initial value.


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