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| JavaLauncher.dll for Java | Java extension | SQL Server 2019 |
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The [!INCLUDE[rsql_launchpad_md](../../includes/rsql-launchpad-md.md)] service runs under **SQLRUserGroup** which uses [AppContainers](https://docs.microsoft.com/windows/desktop/secauthz/appcontainer-isolation) for execution isolation.
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The [!INCLUDE[rsql_launchpad_md](../../includes/rsql-launchpad-md.md)] service runs under **SQLRUserGroup** which uses [AppContainers](/windows/desktop/secauthz/appcontainer-isolation) for execution isolation.
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A separate [!INCLUDE[rsql_launchpad_md](../../includes/rsql-launchpad-md.md)] service is created for each database engine instance to which you have added SQL Server Machine Language Extensions. There is one Launchpad service for each database engine instance, so if you have multiple instances with external script support, you will have a Launchpad service for each one. A database engine instance is bound to the Launchpad service created for it. All invocations of external script in a stored procedure or T-SQL result in the SQL Server service calling the Launchpad service created for the same instance.
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@@ -81,8 +81,8 @@ Communication protocols among components and data platforms are described in thi
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+**Other protocols**
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Processes that might need to work in "chunks" or transfer data back to a remote client can also use the [XDF file format](https://docs.microsoft.com/machine-learning-server/r/concept-what-is-xdf). Actual data transfer is via encoded blobs.
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Processes that might need to work in "chunks" or transfer data back to a remote client can also use the [XDF file format](/machine-learning-server/r/concept-what-is-xdf). Actual data transfer is via encoded blobs.
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## Next steps
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+[What is Language Extensions?](../language-extensions-overview.md)
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+[What is Language Extensions?](../language-extensions-overview.md)
# How to call the Java runtime in SQL Server Language Extensions
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[!INCLUDE [SQL Server 2019 and later](../../includes/applies-to-version/sqlserver2019.md)]
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[SQL Server Language Extensions](../language-extensions-overview.md) uses the [sp_execute_external_script](https://docs.microsoft.com/sql/relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql) system stored procedure as the interface to call the Java runtime.
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[SQL Server Language Extensions](../language-extensions-overview.md) uses the [sp_execute_external_script](../../relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql.md) system stored procedure as the interface to call the Java runtime.
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This how-to article explains implementation details for Java classes and methods that execute on SQL Server.
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@@ -50,7 +50,7 @@ The following are some basic principles when executing Java on SQL Server.
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### Call Java class
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The [sp_execute_external_script](https://docs.microsoft.com/sql/relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql) system stored procedure is the interface used to call the Java runtime. The following example shows an `sp_execute_external_script` using the Java extension, and parameters for specifying path, script, and your custom code.
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The [sp_execute_external_script](../../relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql.md) system stored procedure is the interface used to call the Java runtime. The following example shows an `sp_execute_external_script` using the Java extension, and parameters for specifying path, script, and your custom code.
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> [!NOTE]
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> Note that you don't need to define which method to call. By default, a method called **execute** is called. This means that you need to follow the [Extensibility SDK for Java in SQL Server](extensibility-sdk-java-sql-server.md) and implement an execute method in your Java class.
@@ -84,7 +84,7 @@ Once you have compiled your Java class or classes and created a jar file in your
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## Use external library
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In SQL Server 2019 Release Candidate 1, you can use external libraries for the Java language on Windows and Linux. You can compile your classes into a .jar file and upload the .jar file and other dependencies into the database using the [CREATE EXTERNAL LIBRARY](https://docs.microsoft.com/sql/t-sql/statements/create-external-library-transact-sql) DDL.
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In SQL Server 2019 Release Candidate 1, you can use external libraries for the Java language on Windows and Linux. You can compile your classes into a .jar file and upload the .jar file and other dependencies into the database using the [CREATE EXTERNAL LIBRARY](../../t-sql/statements/create-external-library-transact-sql.md) DDL.
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Example of how to upload a .jar file with external library:
[!INCLUDE [SQL Server 2019 and later](../../includes/applies-to-version/sqlserver2019.md)]
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This article maps SQL Server data types to Java data types for data structures and parameters on [sp_execute_external_script](https://docs.microsoft.com/sql/relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql).
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This article maps SQL Server data types to Java data types for data structures and parameters on [sp_execute_external_script](../../relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql.md).
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The following SQL and Java data types are currently supported for Input/Output data sets and Input/Output parameters.
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@@ -48,4 +48,4 @@ The following SQL and Java data types are currently supported for Input/Output d
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## Next steps
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+[How to call Java in SQL Server](../how-to/call-java-from-sql.md)
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+[How to call Java in SQL Server](../how-to/call-java-from-sql.md)
Learn how to install the Language Extensions component on SQL Server by running the [!INCLUDE[ssNoVersion](../../includes/ssnoversion-md.md)] setup wizard.
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> [!NOTE]
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> This article is for installation of SQL Server Language Extensions on Windows. For Linux, see [Install SQL Server 2019 Language Extensions (Java) on Linux](https://docs.microsoft.com/sql//linux/sql-server-linux-setup-language-extensions)
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> This article is for installation of SQL Server Language Extensions on Windows. For Linux, see [Install SQL Server 2019 Language Extensions (Java) on Linux](../..//linux/sql-server-linux-setup-language-extensions.md)
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<aname="prerequisites"></a>
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@@ -27,7 +27,7 @@ Learn how to install the Language Extensions component on SQL Server by running
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+ A database engine instance is required. You cannot install just the Language Extensions features, although you can add them incrementally to an existing instance.
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+ For business continuity, [Always On Availability Groups](https://docs.microsoft.com/sql/database-engine/availability-groups/windows/overview-of-always-on-availability-groups-sql-server) are supported for Language Extensions. You have to install language extensions, and configure packages, on each node.
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+ For business continuity, [Always On Availability Groups](../../database-engine/availability-groups/windows/overview-of-always-on-availability-groups-sql-server.md) are supported for Language Extensions. You have to install language extensions, and configure packages, on each node.
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+ Installing Language Extensions is supported on a failover cluster in SQL Server 2019.
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- If you want to use your own Java runtime, select **Machine Learning Services and Language Extensions**. Do not select Java.
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If you want to use R and Python, see [Install SQL Server Machine Learning Services on Windows](https://docs.microsoft.com/sql/machine-learning/install/sql-machine-learning-services-windows-install).
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If you want to use R and Python, see [Install SQL Server Machine Learning Services on Windows](../../machine-learning/install/sql-machine-learning-services-windows-install.md).
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Note of the location of the folder under the path `..\Setup Bootstrap\Log` where the configuration files are stored. When setup is complete, you can review the installed components in the Summary file.
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6. After setup is complete, if you are instructed to restart the computer, do so now. It is important to read the message from the Installation Wizard when you have finished with Setup. For more information, see [View and Read SQL Server Setup Log Files](https://docs.microsoft.com/sql/database-engine/install-windows/view-and-read-sql-server-setup-log-files).
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6. After setup is complete, if you are instructed to restart the computer, do so now. It is important to read the message from the Installation Wizard when you have finished with Setup. For more information, see [View and Read SQL Server Setup Log Files](../../database-engine/install-windows/view-and-read-sql-server-setup-log-files.md).
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## Add the JRE_HOME variable
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1. Open [!INCLUDE[ssManStudioFull](../../includes/ssmanstudiofull-md.md)].
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> [!TIP]
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> You can download and install the appropriate version from this page: [Download SQL Server Management Studio (SSMS)](https://docs.microsoft.com/sql/ssms/download-sql-server-management-studio-ssms).
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> You can download and install the appropriate version from this page: [Download SQL Server Management Studio (SSMS)](../../ssms/download-sql-server-management-studio-ssms.md).
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>
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> You can also use [Azure Data Studio](../../azure-data-studio/what-is.md), which supports administrative tasks and queries against SQL Server.
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## Register external language
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For each database you want to use language extensions in, you need to register the external language with [CREATE EXTERNAL LANGUAGE](https://docs.microsoft.com/sql/t-sql/statements/create-external-language-transact-sql).
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For each database you want to use language extensions in, you need to register the external language with [CREATE EXTERNAL LANGUAGE](../../t-sql/statements/create-external-language-transact-sql.md).
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The following example adds an external language called Java to a database on SQL Server on Windows.
For more information, see [CREATE EXTERNAL LANGUAGE](https://docs.microsoft.com/sql/t-sql/statements/create-external-language-transact-sql).
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For more information, see [CREATE EXTERNAL LANGUAGE](../../t-sql/statements/create-external-language-transact-sql.md).
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## Verify installation
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On the database, you might need the following configuration updates:
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* [Give users permission to SQL Server Machine Learning Services](../../machine-learning/security/user-permission.md)
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* [Give users permission to execute a specific language](https://docs.microsoft.com/sql/t-sql/statements/create-external-language-transact-sql#permissions)
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* [Give users permission to execute a specific language](../../t-sql/statements/create-external-language-transact-sql.md#permissions)
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> [!NOTE]
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> Whether additional configuration is required depends on your security schema, where you installed SQL Server, and how you expect users to connect to the database and run external scripts.
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Java developers can get started with some simple examples, and learn the basics of how Java works with SQL Server. For your next step, see the following link:
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+ [Tutorial: Regular expressions with Java](../tutorials/search-for-string-using-regular-expressions-in-java.md)
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+ [Tutorial: Regular expressions with Java](../tutorials/search-for-string-using-regular-expressions-in-java.md)
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@@ -24,7 +24,7 @@ In SQL Server 2019, Java is supported. The default Java runtime is Zulu Open JRE
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Language Extensions uses the extensibility framework for executing external code. Code execution is isolated from the core engine processes, but fully integrated with SQL Server query execution. They let you execute code where the data resides, eliminating the need to pull data across the network.
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External languages are defined with [CREATE EXTERNAL LANGUAGE](https://docs.microsoft.com/sql/t-sql/statements/create-external-language-transact-sql). The system stored procedure [sp_execute_external_script](https://docs.microsoft.com/sql/relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql) is used as the interface for executing the code.
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External languages are defined with [CREATE EXTERNAL LANGUAGE](../t-sql/statements/create-external-language-transact-sql.md). The system stored procedure [sp_execute_external_script](../relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql.md) is used as the interface for executing the code.
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Language Extensions provides multiple advantages:
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+**Install the [Microsoft Extensibility SDK for Java](how-to/extensibility-sdk-java-sql-server.md)** to execute Java code on SQL Server
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+**Use [Azure Data Studio](https://docs.microsoft.com/sql/azure-data-studio/what-is) or [SQL Server Management Studio](https://docs.microsoft.com/sql/ssms/sql-server-management-studio-ssms)** for executing external code on SQL Server
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+**Use [Azure Data Studio](../azure-data-studio/what-is.md) or [SQL Server Management Studio](../ssms/sql-server-management-studio-ssms.md)** for executing external code on SQL Server
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+**Use the system stored procedure [sp_execute_external_script](https://docs.microsoft.com/sql/relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql)** to execute your Java code on SQL Server.
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+**Use the system stored procedure [sp_execute_external_script](../relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql.md)** to execute your Java code on SQL Server.
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### Step 3: Write your first code
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## Next steps
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+ Install [SQL Server Language Extensions on Windows](install/install-sql-server-language-extensions-on-windows.md) or [on Linux](../linux/sql-server-linux-setup-language-extensions.md)
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+ Install the [Microsoft Extensibility SDK for Java](how-to/extensibility-sdk-java-sql-server.md)
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+ Install the [Microsoft Extensibility SDK for Java](how-to/extensibility-sdk-java-sql-server.md)
This release adds the support for Language Extensions in SQL Server. For more information about all of the features in this release, see [What's New in SQL Server 2019](../sql-server/what-s-new-in-sql-server-ver15.md) and [Release Notes for SQL Server 2019](../sql-server/sql-server-ver15-release-notes.md).
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This release adds the support for Language Extensions in SQL Server. For more information about all of the features in this release, see [What's New in SQL Server 2019](../sql-server/what-s-new-in-sql-server-ver15.md) and [Release Notes for SQL Server 2019](../sql-server/sql-server-version-15-release-notes.md).
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- The default Java Runtime on Windows and Linux is Open Zulu JRE and is included with the [SQL Server Language Extensions installation on Windows](install/install-sql-server-language-extensions-on-windows.md) and [SQL Server Language Extensions installation on Linux](../linux/sql-server-linux-setup-language-extensions.md).
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- Supported [Java data types](how-to/java-to-sql-data-types.md).
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-[CREATE EXTERNAL LANGUAGE](../t-sql/statements/create-external-language-transact-sql.md) for registering external language (for example, Java) in SQL Server.
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-[Microsoft Extensibility SDK for Java](how-to/extensibility-sdk-java-sql-server.md).
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- On Windows and Linux, Java code can be accessed in an external library using the [CREATE EXTERNAL LIBRARY (Transact-SQL)](../t-sql/statements/create-external-library-transact-sql.md) statement. Learn more: [How to call Java from SQL Server](how-to/call-java-from-sql.md).
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-[Java language extension](language-extensions-overview.md) on Windows and Linux. You can make compiled Java code available to SQL Server by assigning permissions and setting the path. Client apps with access SQL Server can use data and run your code by calling [sp_execute_external_script](https://docs.microsoft.com/sql/relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql), the same procedure used for R and Python integration on SQL Server Machine Learning Services.
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-[Java language extension](language-extensions-overview.md) on Windows and Linux. You can make compiled Java code available to SQL Server by assigning permissions and setting the path. Client apps with access SQL Server can use data and run your code by calling [sp_execute_external_script](../relational-databases/system-stored-procedures/sp-execute-external-script-transact-sql.md), the same procedure used for R and Python integration on SQL Server Machine Learning Services.
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## Next steps
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+ Install [SQL Server Language Extensions on Windows](install/install-sql-server-language-extensions-on-windows.md) or [on Linux](../linux/sql-server-linux-setup-language-extensions.md)
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+ Install [SQL Server Language Extensions on Windows](install/install-sql-server-language-extensions-on-windows.md) or [on Linux](../linux/sql-server-linux-setup-language-extensions.md)
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