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How are databases different? They aren t. However, this is not always simple, which is why this paper seeks to clarify the process of integrating databases into an existing automatic continuous integration process. Author and thought leader, Martin Fowler, recommends that getting the database schema out of the repository and firing it up in the execution environment should be part of the automatic build process.
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Jez Humble, ThoughtWorks, co-author of Continuous Delivery For many software projects, this will include a database. Continuous Integration is a practice designed to ensure that your software is always working, and that you get comprehensive feedback in a few minutes as to whether any given change to your system has broken it. Why continuous integration? CI originated from the Extreme Programming (XP) movement and is now an established development practice. source control develop Dev Dev Dev build test 4ĥ I. Continuous integration ensures that if at any stage a process fails, the build is deemed broken and developers are alerted immediately. The automated continuous integration process begins each time the server detects a change that has been committed to source control by the development team. The following diagram illustrates a typical integration process. However, for applications that rely on a database back-end, build scripts can be extended to perform additional tasks such as creating, testing, and updating a database. Generally, these commands clean directories, run a compiler on source code, and execute unit tests. A CI server uses a build script to execute a series of commands that build an application.
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A stable current build is consistently available, and if a build fails, it can be fixed rapidly and re-tested.
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Code changes are checked into source control, triggering an automated build with unit tests and early feedback in the form of errors returned. Why continuous integration? Continuous integration (CI) is the process of ensuring that all code and related resources in a development project are integrated regularly and tested by an automated build system. This whitepaper is organized into the following sections: I. This paper only covers databases, and not the building of your application code or any other configuration or setup required for your product.
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Changes are committed into source control, triggering the continuous integration process, which builds a test database from source control, exercises and validates the deployment or upgrade process, and runs automated regression tests on your database. SQL Source Control is an add-in to SQL Server Management Studio that source controls your database schema.
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Included in this paper are simple examples using SQL Source Control and the command line interfaces of Red Gate tools. 1 Whitepaper Continuous integration for databases using Red Gate tools A technical overviewĢ Continuous Integration source control develop Dev Dev Dev build test Automated Deployment Deployment package Testing QA v1.0 v2.0 DevOps STAGING / UAT roll back v1.0 v2.0 immune system DevOps PRODUCTION roll back v1.0 v2.0 immune system Userģ Continuous integration for databases using Red Gate tools Introduction This whitepaper examines the challenge of integrating SQL Server databases into an existing build automation process, such as continuous integration, and describes how Red Gate tools can be used to automate the process.