SqlSchema Element for SubscriptionClass/Chronicles/Chronicle (ADF)

Contains the Transact-SQL statements that define a subscription chronicle table.

Синтаксис

<SubscriptionClasses>
    <SubscriptionClass>
        ...
        <Chronicles>
            <Chronicle>
                ...
                <SqlSchema>

Element Characteristics

Characteristic	Description
Data type	None.
Default value	None.
Occurrence	Required once per Chronicle element.
Updates	Cannot be added or deleted.

Element Relationships

Relationship	Elements
Parent element	Chronicle Element for SubscriptionClass/Chronicles (ADF)
Child elements	SqlStatement Element for SubscriptionClass/Chronicles/Chronicle/SqlSchema (ADF)

Замечания

A SqlSchema element defines one or more SqlStatement elements.

When using a subscription chronicle you should include one SqlStatement element that drops or renames the chronicle table if it already exists, and one SqlStatement element that creates the chronicle table. If you do not drop or rename an existing chronicle table, you will receive an "object exists" error when you update the application.

If you want to keep your subscription chronicle data when updating your application, you can comment out the CREATE TABLE statement in your application definition file (ADF) after you create the application.

Пример

The following example shows how to drop an existing subscription chronicle table named StockSubscriptionChron, and then create the subscription chronicle table. The table contains three columns, SubscriberID, StockSymbol, and StockPrice.

<SqlSchema>
    <SqlStatement>
    IF EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES 
    WHERE TABLE_NAME = &apos;StockSubscriptionChron&apos;)
    DROP TABLE StockSubscriptionChron;
    </SqlStatement>
    <SqlStatement>
    CREATE TABLE StockSubscriptionChron
    (
    SubscriberId bigint,
    StockSymbol char(10),
    StockPrice money
    PRIMARY KEY (SubscriberId)
    );
    </SqlStatement>
</SqlSchema>

См. также

Справочник

Application Definition File Reference

Другие ресурсы

Определение хроники для класса подписки
Обновление экземпляров и приложений

Справка и поддержка

Получение помощи по SQL Server 2005