An IIdentifierGenerator that combines a hi/lo algorithm with an underlying oracle-style sequence that generates hi values.

Namespace:  NHibernate.Id
Assembly:  NHibernate (in NHibernate.dll)

Syntax

Visual Basic (Declaration)
Public Class SequenceHiLoGenerator _
	Inherits SequenceGenerator
C#
public class SequenceHiLoGenerator : SequenceGenerator
Visual C++
public ref class SequenceHiLoGenerator : public SequenceGenerator
JavaScript
NHibernate.Id.SequenceHiLoGenerator = function();

Type.createClass(
	'NHibernate.Id.SequenceHiLoGenerator',
	NHibernate.Id.SequenceGenerator);

Remarks

This id generation strategy is specified in the mapping file as

 Copy Code
            <generator class="seqhilo">
            	<param name="sequence">uid_sequence</param>
            	<param name="max_lo">max_lo_value</param>
            	<param name="schema">db_schema</param>
            </generator>
            

The sequence parameter is required, the max_lo and schema are optional.

The user may specify a max_lo value to determine how often new hi values are fetched. If sequences are not avaliable, TableHiLoGenerator might be an alternative.

Inheritance Hierarchy

System..::.Object
  NHibernate.Id..::.SequenceGenerator
    NHibernate.Id..::.SequenceHiLoGenerator

See Also