SQL Server 数据库项目部署前和部署后脚本

Question

我已经在一个表中添加了一个额外的列，我想在部署后脚本中使用查询对其进行初始化。不幸的是，我似乎无法编写每次都可以运行的查询，所以我正在寻找一种方法来检查预部署脚本是否该列可用，并将参数或变量传递给部署后脚本然后将运行一次初始化查询。

尝试 1:我尝试在预部署脚本中设置 sqlcmd var，但不允许使用以下语法:

IF COL_LENGTH('dbo.Table','NewColumn') IS NULL
    :setvar PerformInitQuery 1

尝试 2:我还尝试在预部署脚本中使用普通变量:

DECLARE @PerformInitQuery BIT = 0
IF COL_LENGTH('dbo.Table','NewColumn') IS NULL
    SET @PerformInitQuery = 1

并在部署后脚本中访问它:

IF @PerformInitQuery = 1
BEGIN
    :r ".\DeploymentScripts\PerformInitQuery.sql"
END

最后一次尝试似乎在从 Visual Studio 发布项目时有效，但在我们的构建服务器上无效；它使用 SqlPackage.exe 将生成的 .dacpac 文件发布到数据库。

Error SQL72014: .Net SqlClient Data Provider:

Msg 137, Level 15, State 2, Line 12
Must declare the scalar variable "@PerformInitQuery"

Answer 1

您可以尝试使用临时表来保存您希望从前脚本传递到后脚本的值；

/*
     Pre-Deployment Script Template                         
    --------------------------------------------------------------------------------------
     This file contains SQL statements that will be executed before the build script.   
     Use SQLCMD syntax to include a file in the pre-deployment script.          
     Example:      :r .\myfile.sql                              
     Use SQLCMD syntax to reference a variable in the pre-deployment script.        
     Example:      :setvar TableName MyTable                            
                   SELECT * FROM [$(TableName)]                 
    --------------------------------------------------------------------------------------
    */

    select 'hello world' as [Col] into #temptable

在部署后脚本中获取；

/*
Post-Deployment Script Template                         
--------------------------------------------------------------------------------------
 This file contains SQL statements that will be appended to the build script.       
 Use SQLCMD syntax to include a file in the post-deployment script.         
 Example:      :r .\myfile.sql                              
 Use SQLCMD syntax to reference a variable in the post-deployment script.       
 Example:      :setvar TableName MyTable                            
               SELECT * FROM [$(TableName)]                 
--------------------------------------------------------------------------------------
*/

declare @var nvarchar(200)
select @var = [Col] from #temptable

print @var

hello world

Update complete.