Enum Class TemporalTableStrategy

java.lang.Object

java.lang.Enum<TemporalTableStrategy>

org.hibernate.temporal.TemporalTableStrategy

All Implemented Interfaces:

Serializable, Comparable<TemporalTableStrategy>, Constable

@Incubating
public enum TemporalTableStrategy
extends Enum<TemporalTableStrategy>

Enumerates the possible mapping strategies for temporal entities and collections.

Since:

7.4

See Also:

• Temporal
• StateManagementSettings.TEMPORAL_TABLE_STRATEGY

Nested Class Summary

Nested classes/interfaces inherited from class Enum

Enum.EnumDesc<E>

Enum Constant Summary

Enum Constants

Enum Constant	Description
AUTO	Let us choose a temporal table mapping strategy for you because YOLO.
HISTORY_TABLE	Maintain two tables, one for current data and one for historical data.
NATIVE	Use native ANSI SQL 2011-style temporal tables where they are supported (Maria, SQL Server, Db2).
SINGLE_TABLE	Store historical data together with current data in one table.

Method Summary

Modifier and Type	Method	Description
static TemporalTableStrategy	valueOf(String name)	Returns the enum constant of this class with the specified name.
static TemporalTableStrategy[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

NATIVE

public static final TemporalTableStrategy NATIVE

Use native ANSI SQL 2011-style temporal tables where they are supported (Maria, SQL Server, Db2).

SINGLE_TABLE

public static final TemporalTableStrategy SINGLE_TABLE

Store historical data together with current data in one table. The table does not have the usual foreign key constraints that would exist for any non-temporal entity, and so it is the responsibility of the application program to maintain and enforce referential integrity.

HISTORY_TABLE

public static final TemporalTableStrategy HISTORY_TABLE

Maintain two tables, one for current data and one for historical data. The table for current data has all the usual foreign key constraints that would exist for any non-temporal entity; the table for historical data has no foreign key constraints.

• When a new entity instance is created, a row is inserted in both tables.
• When the instance is updated, its row in the table for current data is updated; but in the table for historical data, a new revision row is inserted and the previous revision row is marked as superseded by setting its row end column to the current timestamp.
• When an entity instance is removed, its row in the table for current data is deleted; and the current revision row in the table for historical data is marked as superseded by setting its row end column.

Queries for current data are run against the table for current data. Queries for historical data (that is, any query in a session created using CommonBuilder.asOf(Instant)) are executed against the table for historical data.

AUTO

public static final TemporalTableStrategy AUTO

Let us choose a temporal table mapping strategy for you because YOLO. Selects HISTORY_TABLE except on databases with especially robust implementations of NATIVE temporal versioning. This is the default.

See Also:

• TemporalTableSupport.getDefaultTemporalTableStrategy()

Method Details

values

public static TemporalTableStrategy[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static TemporalTableStrategy valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null