com.blazebit.persistence.spi.UpdateJoinStyle Maven / Gradle / Ivy
/*
* Copyright 2014 - 2022 Blazebit.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.blazebit.persistence.spi;
/**
* The possible update join styles.
*
* @author Christian Beikov
* @since 1.5.0
*/
public enum UpdateJoinStyle {
/**
* No support for joins in update statements.
*/
NONE,
/**
* Requires a FROM clause for table references.
*/
FROM,
/**
* Requires a FROM clause for table references but the table alias in the UPDATE clause.
*/
FROM_ALIAS,
/**
* Requires table references to be appended after the update table.
*/
REFERENCE,
/**
* Requires a MERGE statement.
*/
MERGE;
}