Package org.lealone.command.ddl

Source Code of org.lealone.command.ddl.AlterSchemaRename

/*
* Copyright 2004-2013 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.lealone.command.ddl;

import java.util.ArrayList;

import org.lealone.command.CommandInterface;
import org.lealone.constant.ErrorCode;
import org.lealone.dbobject.Schema;
import org.lealone.dbobject.SchemaObject;
import org.lealone.engine.Database;
import org.lealone.engine.Session;
import org.lealone.message.DbException;

/**
* This class represents the statement
* ALTER SCHEMA RENAME
*/
public class AlterSchemaRename extends DefineCommand {

    private Schema oldSchema;
    private String newSchemaName;

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

    public void setOldSchema(Schema schema) {
        oldSchema = schema;
    }

    public void setNewName(String name) {
        newSchemaName = name;
    }

    public int update() {
        session.commit(true);
        Database db = session.getDatabase();
        if (!oldSchema.canDrop()) {
            throw DbException.get(ErrorCode.SCHEMA_CAN_NOT_BE_DROPPED_1, oldSchema.getName());
        }
        if (db.findSchema(newSchemaName) != null || newSchemaName.equals(oldSchema.getName())) {
            throw DbException.get(ErrorCode.SCHEMA_ALREADY_EXISTS_1, newSchemaName);
        }
        session.getUser().checkAdmin();
        db.renameDatabaseObject(session, oldSchema, newSchemaName);
        ArrayList<SchemaObject> all = db.getAllSchemaObjects();
        for (SchemaObject schemaObject : all) {
            db.update(session, schemaObject);
        }
        return 0;
    }

    public int getType() {
        return CommandInterface.ALTER_SCHEMA_RENAME;
    }

}
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