org.h2.command.ddl.DropUser Maven / Gradle / Ivy
/*
* Copyright 2004-2011 H2 Group. Multiple-Licensed under the H2 License,
* Version 1.0, and under the Eclipse Public License, Version 1.0
* (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.command.ddl;
import org.h2.command.CommandInterface;
import org.h2.constant.ErrorCode;
import org.h2.engine.Database;
import org.h2.engine.Session;
import org.h2.engine.User;
import org.h2.message.DbException;
/**
* This class represents the statement
* DROP USER
*/
public class DropUser extends DefineCommand {
private boolean ifExists;
private String userName;
public DropUser(Session session) {
super(session);
}
public void setIfExists(boolean b) {
ifExists = b;
}
public void setUserName(String userName) {
this.userName = userName;
}
public int update() {
session.getUser().checkAdmin();
session.commit(true);
Database db = session.getDatabase();
User user = db.findUser(userName);
if (user == null) {
if (!ifExists) {
throw DbException.get(ErrorCode.USER_NOT_FOUND_1, userName);
}
} else {
if (user == session.getUser()) {
int adminUserCount = 0;
for (User u : db.getAllUsers()) {
if (u.isAdmin()) {
adminUserCount++;
}
}
if (adminUserCount == 1) {
throw DbException.get(ErrorCode.CANNOT_DROP_CURRENT_USER);
}
}
user.checkOwnsNoSchemas();
db.removeDatabaseObject(session, user);
}
return 0;
}
public boolean isTransactional() {
return false;
}
public int getType() {
return CommandInterface.DROP_USER;
}
}