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Javadoc for TemporaryTableKind

This commit is contained in:
Christian Beikov 2023-01-05 11:37:52 +01:00
parent 1fd45b607c
commit f0cc803b50
1 changed files with 30 additions and 1 deletions
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hibernate-core/src/main/java/org/hibernate/dialect/temptable/TemporaryTableKind.java
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@ -6,11 +6,40 @@
*/
package org.hibernate.dialect.temptable;
import org.hibernate.dialect.Dialect;
/**
* @author Christian Beikov
* Classifies the kinds of temporary table implementations.
*
* @since 6.0
*/
public enum TemporaryTableKind {
/**
* Modeled as a regular table with a special {@link TemporaryTableSessionUidColumn},
* which is explicitly deleted from at the end of a transaction.
* <p>
* The table is created once on application startup, unless {@link org.hibernate.query.sqm.mutation.internal.temptable.PersistentTableStrategy#CREATE_ID_TABLES}
* is disabled and dropped on application startup if {@link org.hibernate.query.sqm.mutation.internal.temptable.PersistentTableStrategy#CREATE_ID_TABLES}
* and {@link org.hibernate.query.sqm.mutation.internal.temptable.PersistentTableStrategy#DROP_ID_TABLES} aren't
* disabled.
*/
PERSISTENT,
/**
* Modeled as what the SQL standard calls a local temporary table, which is a table that is defined per connection.
* Usually, the table is created when needed in a transaction and databases usually drop it on transaction commit,
* though it is possible to control if Hibernate should drop it explicitly through {@link Dialect#getTemporaryTableAfterUseAction()}
* and {@link org.hibernate.query.sqm.mutation.internal.temptable.LocalTemporaryTableStrategy#DROP_ID_TABLES}.
*/
LOCAL,
/**
* Modeled as what the SQL standard calls a global temporary table, which is a table that is defined once per schema,
* but its data is scoped to a transaction where data is usually deleted automatically on transaction commit,
* though it is possible to control whether Hibernate should delete data or not through {@link Dialect#getTemporaryTableAfterUseAction()}.
* <p>
* The table is created once on application startup, unless {@link org.hibernate.query.sqm.mutation.internal.temptable.GlobalTemporaryTableStrategy#CREATE_ID_TABLES}
* is disabled and dropped on application startup if {@link org.hibernate.query.sqm.mutation.internal.temptable.GlobalTemporaryTableStrategy#CREATE_ID_TABLES}
* and {@link org.hibernate.query.sqm.mutation.internal.temptable.GlobalTemporaryTableStrategy#DROP_ID_TABLES} aren't
* disabled.
*/
GLOBAL;
}