createuserdatatype.java

来自「非常棒的java数据库」· Java 代码 · 共 63 行

/*
 * Copyright 2004-2008 H2 Group. Licensed under the H2 License, Version 1.0
 * (http://h2database.com/html/license.html).
 * Initial Developer: H2 Group
 */
package org.h2.command.ddl;

import java.sql.SQLException;

import org.h2.constant.ErrorCode;
import org.h2.engine.Database;
import org.h2.engine.Session;
import org.h2.engine.UserDataType;
import org.h2.message.Message;
import org.h2.table.Column;

/**
 * This class represents the statement
 * CREATE DOMAIN
 */
public class CreateUserDataType extends DefineCommand {

    private String typeName;
    private Column column;
    private boolean ifNotExists;

    public CreateUserDataType(Session session) {
        super(session);
    }

    public void setTypeName(String name) {
        this.typeName = name;
    }

    public void setColumn(Column column) {
        this.column = column;
    }

    public void setIfNotExists(boolean ifNotExists) {
        // TODO user data type: if exists - probably better use 'or replace'
        this.ifNotExists = ifNotExists;
    }

    public int update() throws SQLException {
        session.getUser().checkAdmin();
        session.commit(true);
        Database db = session.getDatabase();
        session.getUser().checkAdmin();
        if (db.findUserDataType(typeName) != null) {
            if (ifNotExists) {
                return 0;
            }
            throw Message.getSQLException(ErrorCode.USER_DATA_TYPE_ALREADY_EXISTS_1, typeName);
        }
        int id = getObjectId(false, true);
        UserDataType type = new UserDataType(db, id, typeName);
        type.setColumn(column);
        db.addDatabaseObject(session, type);
        return 0;
    }

}