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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"ExplicitVisit method for some TSqlFragment descendant classes is never called","articleBody":"For example, [TSqlFragmentVisitor](https://learn.microsoft.com/en-us/dotnet/api/microsoft.sqlserver.transactsql.scriptdom.tsqlfragmentvisitor?view=sql-dacfx-160) has virtual method for visiting DataModificationStatement - `ExplicitVisit(DataModificationStatement)` which can be overridden and \"used\" for whatever reason in an app... The thing is - it is never called. There is no code invoking `ExplicitVisit` for this abstract class and many others. These methods are stillborn and it takes some time to realize that the code does not work and to discover why. For concrete descendants of DataModificationStatement (InsertStatement etc.) it does work as expected.\n\nConsider removing such stillborn methods from `TSqlFragmentVisitor` or mark them `sealed` or start invoking them. \n\nAlso it'd be great to improve documentation: please elaborate scenarios in which `ExplicitVisit` method should be used instead of `Visit`, when `TSqlConcreteFragmentVisitor` should be utilized.","author":{"url":"https://github.com/IVNSTN","@type":"Person","name":"IVNSTN"},"datePublished":"2025-07-10T13:38:06.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/145/SqlScriptDOM/issues/145"}