org.h2.command.ddl.AlterTable Maven / Gradle / Ivy
/*
* Copyright 2004-2022 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (https://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.command.ddl;
import org.h2.api.ErrorCode;
import org.h2.engine.Right;
import org.h2.engine.SessionLocal;
import org.h2.message.DbException;
import org.h2.schema.Schema;
import org.h2.table.Table;
/**
* The base class for ALTER TABLE commands.
*/
public abstract class AlterTable extends SchemaCommand {
String tableName;
boolean ifTableExists;
AlterTable(SessionLocal session, Schema schema) {
super(session, schema);
}
public final void setTableName(String tableName) {
this.tableName = tableName;
}
public final void setIfTableExists(boolean b) {
ifTableExists = b;
}
@Override
public final long update() {
Table table = getSchema().findTableOrView(session, tableName);
if (table == null) {
if (ifTableExists) {
return 0;
}
throw DbException.get(ErrorCode.TABLE_OR_VIEW_NOT_FOUND_1, tableName);
}
session.getUser().checkTableRight(table, Right.SCHEMA_OWNER);
return update(table);
}
abstract long update(Table table);
}