[hibernate-dev] Trying to understand the significance and use of the sequence methods in Dialect

Other than the javadocs, are these documented anywhere? * public String getSequenceNextValString(String sequenceName) * public String getSelectSequenceNextValString(String sequenceName) I have been following their usage throughout the codebase, but it is not easy. Is getSequenceNextValString only used in place of single values? E.g. INSERT INTO NEW_USER VALUES (SEQ_USER.NEXTVAL, 'Adams', 'John') ? Or are there other uses? Is getSelectSequenceNextValString only used to get the "batch" for Hibernate's future issuance of ids? The reason I am asking is we would like to leverage the MS SQL Server's sp_sequence_get_range . By using the approach of using the stored procedure for Hibernate's allocation and otherwise using an increment by 1 allows higher efficiency with the Hibernate based application and prevent breaking legacy access to the table/use of the sequence. This topic was unclearly broached in HHH-10130. Internet research below... Take the following example: CREATE SEQUENCE [dbo].[hibernate_sequence2] AS [bigint] START WITH 1 INCREMENT BY 1 CACHE 200 ; CREATE TABLE [MyTable2] ( [ID] [bigint] PRIMARY KEY NOT NULL DEFAULT (NEXT VALUE FOR [dbo].[hibernate_sequence2]), [Title] [nvarchar](64) NOT NULL ); insert into MyTable2 (Title) values ('test 1'); insert into MyTable2 (Title) values ('test 2'); insert into MyTable2 (Title) values ('test 3'); insert into MyTable2 (Title) values ('test 4'); select * from MyTable2; --ID Title --1 test 1 --2 test 2 --3 test 3 --4 test 4 DECLARE @range_first_value_output sql_variant ; declare @range_size int=50+1; DECLARE @sequence_increment sql_variant ; declare @range_last_value sql_variant; EXEC sys.sp_sequence_get_range @sequence_name = N'[dbo].[hibernate_sequence2]' , @range_size = @range_size , @range_first_value = @range_first_value_output OUTPUT , @sequence_increment = @sequence_increment OUTPUT , @range_last_value = @range_last_value OUTPUT ; SELECT @range_first_value_output AS FirstNumber, @sequence_increment as sequence_increment, @range_last_value as range_last_value ; --FirstNumber sequence_increment range_last_value -- 5 1 55 insert into MyTable2 (Title) values ('test 5'); select * from MyTable2; --ID Title --1 test 1 --2 test 2 --3 test 3 --4 test 4 --56 test 5 I know there are issues of "knowing" the @SequenceGenerator(allocationSize), but I will assume a fixed 50 for now. Internet research and other useless links... 1: Not hibernate, but same goal - https://groups.google.com/forum/#!topic/ebean/wG6VyVfEMQk 2: Not helpful - https://stackoverflow.com/questions/17780394/hibernate-identity-vs-sequen... 3: Closest Hibernate Hit - https://hibernate.atlassian.net/browse/HHH-10130 4: My google searches - https://www.google.com/search?safe=off&q=%22sp_sequence_get_range%22+... and https://www.google.com/search?safe=off&q=%22sp_sequence_get_range%22+jpa 5: An interesting discussion, but not applicable - https://hibernate.atlassian.net/browse/HHH-10560 6: Sequences Added to SQL Server Dialect - https://hibernate.atlassian.net/browse/HHH-8440 7: My JIRA search - https://hibernate.atlassian.net/browse/HHH-6950?jql=(text%20~%20sequence%... -Jason -- Jason Pyeron | Architect PD Inc | 10 w 24th St | Baltimore, MD | .mil: jason.j.pyeron.ctr(a)mail.mil .com: jpyeron(a)pdinc.us tel : 202-741-9397