com.oceanbase.tools.sqlparser.statement.select.FlashbackUsage Maven / Gradle / Ivy
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ob-sql-parser parses an SQL statement into a Java classes.
/*
* Copyright (c) 2023 OceanBase.
*
* 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.oceanbase.tools.sqlparser.statement.select;
import org.antlr.v4.runtime.ParserRuleContext;
import com.oceanbase.tools.sqlparser.statement.BaseStatement;
import com.oceanbase.tools.sqlparser.statement.Expression;
import lombok.EqualsAndHashCode;
import lombok.Getter;
import lombok.NonNull;
/**
* {@link FlashbackUsage}
*
* @author yh263208
* @date 2022-12-05 20:42
* @since ODC_release_4.1.0
* @see BaseStatement
*/
@Getter
@EqualsAndHashCode(callSuper = false)
public class FlashbackUsage extends BaseStatement {
private final FlashBackType type;
private final Expression expression;
public FlashbackUsage(@NonNull ParserRuleContext context, @NonNull FlashBackType type,
@NonNull Expression expression) {
super(context);
this.type = type;
this.expression = expression;
}
public FlashbackUsage(@NonNull FlashBackType type, @NonNull Expression expression) {
this.type = type;
this.expression = expression;
}
@Override
public String toString() {
StringBuilder buffer = new StringBuilder("AS OF ");
if (type == FlashBackType.AS_OF_TIMESTAMP) {
buffer.append("TIMESTAMP ");
} else if (type == FlashBackType.AS_OF_SCN) {
buffer.append("SCN ");
} else {
buffer.append("SNAPSHOT ");
}
return buffer.append(expression.toString()).toString();
}
}