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Functionality.md

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Functionality

In SQL projects there are several capabilities that can be specified in the .sqlproj file that impact the database model either at project build or deployment. The following sections describe some of these capabilities that are available for Microsoft.Build.Sql projects.

Capability Build time validation Included in deployment
Target platform Yes Optional, yes by default
Database references Yes Optional for same database, no by default
Package references Yes No
SQLCMD variables No Yes
Pre/post-deployment scripts No Yes

If you're new to SQL projects, you might also want to check out the tutorial.

Default SQL files included in build

The SDK specifies a default globbing pattern to include **/*.sql from the project root.

  • .sql files that do not fall under the default globbing pattern still need to be included explicitly.
  • Pre/post-deployment scripts that are specified by the <PreDeploy> or <PostDeploy> tags are automatically excluded from build.
  • To manually exclude a .sql file from the project, add <Build Remove="filename.sql"/> to the project file.

Target platform

The target platform property is contained in the DSP tag in the .sqlproj file under the <PropertyGroup> item. The target platform is used during project build to validate support for features included in the project and is added to the .dacpac file as a property. By default, during deployment, the target platform is checked against the target database to ensure compatibility. If the target platform is not supported by the target database, the deployment fails unless an override publish option is specified.

<Project DefaultTargets="Build">
  <Sdk Name="Microsoft.Build.Sql" Version="0.1.9-preview" />
  <PropertyGroup>
    <Name>AdventureWorks</Name>
    <DSP>Microsoft.Data.Tools.Schema.Sql.SqlAzureV12DatabaseSchemaProvider</DSP>
  </PropertyGroup>
...

Valid settings for the target platform are:

  • Microsoft.Data.Tools.Schema.Sql.Sql120DatabaseSchemaProvider
  • Microsoft.Data.Tools.Schema.Sql.Sql130DatabaseSchemaProvider
  • Microsoft.Data.Tools.Schema.Sql.Sql140DatabaseSchemaProvider
  • Microsoft.Data.Tools.Schema.Sql.Sql150DatabaseSchemaProvider
  • Microsoft.Data.Tools.Schema.Sql.Sql160DatabaseSchemaProvider
  • Microsoft.Data.Tools.Schema.Sql.SqlAzureV12DatabaseSchemaProvider
  • Microsoft.Data.Tools.Schema.Sql.SqlDwDatabaseSchemaProvider

Database references

The database model validation at build time can be extended past the contents of the SQL project through database references. Database references specified in the .sqlproj file can reference another SQL project or a .dacpac file, representing either another database or more components of the same database.

The following attributes are available for database references that represent another database:

  • DatabaseSqlCmdVariable: the value is the name of the variable that is used to reference the database
    • Reference setting: <DatabaseSqlCmdVariable>SomeOtherDatabase</DatabaseSqlCmdVariable>
    • Usage example: SELECT * FROM [$(SomeOtherDatabase)].dbo.Table1
  • ServerSqlCmdVariable: the value is the name of the variable that is used to reference the server where the database resides. used with DatabaseSqlCmdVariable, when the database is in another server.
    • Reference setting: <ServerSqlCmdVariable>SomeOtherServer</ServerSqlCmdVariable>
    • Usage example: SELECT * FROM [$(SomeOtherServer)].[$(SomeOtherDatabase)].dbo.Table1
  • DatabaseVariableLiteralValue: the value is the literal name of the database as used in the SQL project, similar to DatabaseSqlCmdVariable but the reference to other database is a literal value
    • Reference setting: <DatabaseVariableLiteralValue>SomeOtherDatabase</DatabaseVariableLiteralValue>
    • Usage example: SELECT * FROM [SomeOtherDatabase].dbo.Table1

In a SQL project file, a database reference is specified as an ArtifactReference item with the Include attribute set to the path of the .dacpac file.

...
  <ItemGroup>
    <ArtifactReference Include="SampleA.dacpac">
      <DatabaseSqlCmdVariable>DatabaseA</DatabaseSqlCmdVariable>
    </ArtifactReference>
  </ItemGroup>
</Project>

When a database reference is additional objects for the same database as the SQL project, the objects can be included in a SqlPackage publish operation by setting the /p:IncludeCompositeObjects property to true.

Package references

Package references are used to reference NuGet packages that contain a .dacpac file and are used to extend the database model at build time similarly as a database reference.

The following example from a SQL project file references the Microsoft.SqlServer.Dacpacs package for the master database.

...
  <ItemGroup>
    <PackageReference Include="Microsoft.SqlServer.Dacpacs.Master" Version="160.0.0" />
  </ItemGroup>
</Project>

In addition to the attributes available for database references, the following DacpacName attribute can be specified to select a .dacpac from a package that contains multiple .dacpac files.

...
  <ItemGroup>
    <PackageReference Include="Contoso.Applications" Version="160.0.0">
      <DacpacName>Outfitters</DacpacName>
    </PackageReference>
  </ItemGroup>
</Project>

SqlCmd variables

SqlCmd variables can be defined in the .sqlproj file and are used to replace tokens in SQL objects and scripts during .dacpac deployment. The following example from a SQL project file defines a variable named EnvironmentName that available for use in the project's objects and scripts.

...
  <ItemGroup>
    <SqlCmdVariable Include="EnvironmentName">
      <DefaultValue>testing</DefaultValue>
      <Value>$(SqlCmdVar__1)</Value>
    </SqlCmdVariable>
  </ItemGroup>
</Project>
IF '$(EnvironmentName)' = 'testing'
BEING
    -- do something
END

When a compiled SQL project (.dacpac) is deployed, the value of the variable is replaced with the value specified in the deployment command. For example, the following command deploys the AdventureWorks.dacpac and sets the value of the EnvironmentName variable to production.

SqlPackage /Action:Publish /SourceFile:AdventureWorks.dacpac /TargetConnectionString:{connection_string_here} /v:EnvironmentName=production

Pre/post-deployment scripts

Pre- and post-deployment scripts are SQL scripts that are included in the project to be executed during deployment. Pre/post-deployment scrips are included in the .dacpac but they are not compiled into or validated with database object model. A pre-deployment script is executed before the database model is applied and a post-deployment script is executed after the database model is applied. The following example from a SQL project file adds the file populate-app-settings.sql as post-deployment script.

...
  <ItemGroup>
    <PostDeploy Include="populate-app-settings.sql" />
  </ItemGroup>
</Project>