8/26/2023 0 Comments Sql server deadlock countUsing WITH (ROWLOCK), which seems to result in essentially the same situation only with Key Locks instead of a Page Locks causing the deadlock.Asking ChatGPT, which suggested that it could be related to SQL Server reusing the template statements, since the template strings are identical, while the concatenated versions are unique because they include the variables within the string.Creating a unique PreparedStatement object rather than reusing one object – results in no change.Lowering the isolation level to READ_UNCOMMITTED – results in only delete statements locking.Viewing it in SentryOne Plan Explorer is a bit easier on the eyes, and you can also hit the 'play' button to watch how the timing of the deadlock played out. Both tables are being accessed in both sessions. to-simulate-a-deadlock-in-sql-server-in-a-single-process) - spsimulatedeadlock.sql. ![]() What I don't understand is why this concurrency only becomes a problem when using templated statements, as opposed to concatenated ones. 1 Answer Sorted by: 10 This is a classic deadlock, but it can be hard to tell in SSMS or by just looking at the XML. The environment is highly concurrent in that large batches of data are processed in multiple threads, with many of each of insert, delete, and select. With this change being the ONLY difference in the code, I now receive deadlocks that interrupt processing and I don't understand why. ![]() ![]() tString(2, getModel()) įor context, I am using SQL Server 2019 and JDBC. So, what is the reason of deadlock (I use SQL Server 2014) sql-server database-deadlocks sqltransaction Share. PreparedStatement preparedStatement = connection.prepareStatement(query) īecomes the second: String query = "SELECT * FROM CARS WHERE MAKE = ? AND MODEL = ?" I am working on a piece of enterprise software for which we've recently decided to move from building SQL queries via string concatenation to doing so by using templates, so that this first example: String query = "SELECT * FROM CARS WHERE MAKE = '" + getMake()
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