1/12/2024 0 Comments Russian dossier case![]() Historically, we have had Code Analysis capabilities within Visual Studio SQL Projects. ScriptDom being a full-fidelity parser, is great for statically analyzing T-SQL code to proactively identify anti-patterns. And I have blogged in the past about usage of this parser on my personal blog, including using ScriptDom to format T-SQL etc.: Arvind Shyamsundar’s technical blog ScriptDom in SQL Projects (Code Analysis) You can also watch a detailed presentation on this topic done to the PASS AppDev virtual chapter session: T-SQL Swiss Knife using the ScriptDom T-SQL Parser by Arvind Shyamsundar. To know more, you can examine the samples on my repo. Parse(), thereby creating an instance of the “walker” class and walk the AST: MyVisitor checker = new MyVisitor() Public override void Visit(TSqlStatement node)Īnd then, in the main code, we call. ![]() Internal bool containsOnlySelects = true Usually this is done by implementing a class which can then store state as the tree is walked: class MyVisitor : TSqlFragmentVisitor For example, it can parse CTAS statements! Anyways, once the parser produces the AST, you can use the well-known Visitor pattern to walk the tree. Var tree = parser.Parse(rdr, out errors) īTW, this parser now supports many constructs of the T-SQL syntax specific to Azure Synapse Analytics as well. Var parser = new TSql150Parser(true, SqlEngineType.All) Currently for Azure SQL and SQL Server 2019, that would be the TSqlParser150 class: using (var rdr = new StringReader(textBox1.Text)) If you are interested in learning about how you can use this library, my GitHub repo has some quite simple examples to get started. Once you add the necessary references to ScriptDom, you can instantiate a TSqlParser class specific to the target version of SQL that you are working with. This library is immensely powerful, and I believe that all SQL developers should be aware of the power and scope it provides. It is also part of the SqlServer PowerShell module, and many other projects, both at Microsoft, and in the broader community. Within the realm of official Microsoft releases, ScriptDom is also one of the core building blocks for DacFx and associated tooling like SqlPackage. Please do leave comments if you feel there is a relevant example which should be linked. ![]() Swartįorgive me if I missed some useful examples – my attempt was not to list all possible related ones, just recent ones I am familiar with. Removing Comments from SQL | Michael J.Microsoft SQL Server Script DOM | Dan Guzman’s Blog ().Parse parameter default values using PowerShell – Part 1 –.Mala Mahadevan has an excellent series on the ScriptDom.In addition, members of the SQL community have some great articles showing practical usage of ScriptDom / SQLDOM to do useful tasks: Last but definitely not the least, many T-SQL static code analysis projects use ScriptDom!.HealthCatalyst ‘HCPosh’ Powershell module, use the parser to programmatically understand the structure of SQL statements.The SQL Sharpener project uses ScriptDom to parse T-SQL and then generate C# wrappers for those stored procedures.The SQL Metadata Toolkit uses ScriptDom to find and map dependencies across the SQL code base. ![]() ![]() boB Taylor uses ScriptDom in his SqlCommandFilters project to auto-parameterize T-SQL statements so that they could be used in the context of Always Encrypted.The T-SQL text is then parsed to get analytics on which tables, views and columns are queried most frequently. NET library, to read XEL audit files containing T-SQL text. A customer uses Azure SQL auditing, coupled with the XELite.I am aware of several interesting use cases where this parser has been leveraged: You can even change the AST if needed and produce a modified T-SQL script with the re-written tree. As an example, you can use it to detect in a robust way if you have any DML statement other than SELECT – which may be useful to detect some forms of SQL injection. Once you have such an AST, you can “walk” the tree to analyze it for various code patterns. This library accurately produces an Abstract Syntax Tree (AST) representation of the T-SQL code. NET library, to programmatically parse Transact-SQL (T-SQL) statements, expressions, and scripts. Over the years, I have leveraged the very useful TransactSql ScriptDom. As a SQL developer, perhaps you might have wondered if there are any equivalent functionality for Azure SQL and SQL Server code? Well, wonder no more! Java developers use tools like SpotBugs for code analysis. NET Developers are perhaps familiar with libraries like Roslyn and CodeDOM, which allow in-depth analysis of code (amongst many other things). ![]()
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