implementing Indexing on XML Columns in SQL Server 2017 Leading to Slow Queries
I'm trying to figure out I'm wondering if anyone has experience with I'm migrating some code and I'm trying to figure out I've been struggling with this for a few days now and could really use some help. I'm working with important performance optimization when querying XML data stored in an XML column in SQL Server 2017. I have a table called `Documents` with an XML column named `Content`, and I'm trying to run a query to retrieve specific nodes within this XML. However, this query is taking an unusually long time to execute, especially as the size of the documents grows. I've created a primary XML index on the `Content` column, but it doesn't seem to be helping as much as I expected. Here’s the query I’m trying to optimize: ```sql SELECT Content.value('(/root/item[@id="1234"]/title)[1]', 'nvarchar(100)') AS Title FROM Documents WHERE Content.exist('(/root/item[@id="1234"])') = 1; ``` I’ve checked the execution plan and noticed that SQL Server is performing a table scan instead of using the index, which is frustrating. I even tried to recompile the query using `OPTION (RECOMPILE)` to see if it would help, but the performance is still poor. Additionally, I've done some research and found recommendations for using secondary XML indexes, so I implemented a secondary XML index based on the path `(/root/item/@id)` but still did not see any improvement. Could there be any best practices that I’m missing when working with XML indexes, or is there a specific configuration in SQL Server that I need to adjust? Any insights on how to speed up these queries would be greatly appreciated, as I am running into timeouts in my application due to these slow responses. For context: I'm using Sql on Windows. Is there a better approach? Thanks for your help in advance! I'm using Sql stable in this project. I recently upgraded to Sql stable. I'm on macOS using the latest version of Sql. Hoping someone can shed some light on this. The stack includes Sql and several other technologies. What are your experiences with this?