Finding Query Store Queries With Missing Index Requests In SQL Server 2019

All The Pretty Little Caveats


I’ve said quite a bit about missing index request utility generally in SQL Server, even as recently as last week!

But then I got a user question about using Query Store to do something similar, so here goes.

If you need a pre-2019 way to do this with Query Store, Kendra Little has a blog post about that here.

WITH
    queries AS
(
    SELECT TOP (100)
        parent_object_name = 
            ISNULL
            (
                OBJECT_NAME(qsq.object_id),
                'No Parent Object'
            ),
        qsqt.query_sql_text,
        query_plan = 
            TRY_CAST(qsp.query_plan AS xml),
        qsrs.first_execution_time,
        qsrs.last_execution_time,
        qsrs.count_executions,
        qsrs.avg_duration,
        qsrs.avg_cpu_time,
        qsp.query_plan_hash,
        qsq.query_hash
    FROM sys.query_store_runtime_stats AS qsrs
    JOIN sys.query_store_plan AS qsp
        ON qsp.plan_id = qsrs.plan_id
    JOIN sys.query_store_query AS qsq
        ON qsq.query_id = qsp.query_id
    JOIN sys.query_store_query_text AS qsqt
        ON qsqt.query_text_id = qsq.query_text_id
    WHERE qsrs.last_execution_time >= DATEADD(DAY, -7, SYSDATETIME())
    AND   qsrs.avg_cpu_time >= (10 * 1000)
    AND   qsq.is_internal_query = 0
    AND   qsp.is_online_index_plan = 0
    ORDER BY qsrs.avg_cpu_time DESC
)
SELECT
    qs.*
FROM queries AS qs
CROSS APPLY
(
    SELECT TOP (1)
        gqs.*
    FROM sys.dm_db_missing_index_group_stats_query AS gqs
    WHERE qs.query_hash = gqs.query_hash
    AND   qs.query_plan_hash = gqs.query_plan_hash
    ORDER BY
        gqs.last_user_seek DESC,
        gqs.last_user_scan DESC
) AS gqs
ORDER BY qs.avg_cpu_time DESC
OPTION(RECOMPILE);

I don’t love this query, because I don’t love querying Query Store views. That’s why I wrote sp_QuickieStore to make it a whole lot easier.

But anyway, this will get you a similar bunch of information.

Thanks for reading!

Going Further


If this is the kind of SQL Server stuff you love learning about, you’ll love my training. I’m offering a 75% discount on to my blog readers if you click from here. I’m also available for consulting if you just don’t have time for that and need to solve performance problems quickly.



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