Operational Defect Database
BugZero found this defect 1308 days ago.
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Microsoft SQL Server | 12768690
KB4502532 - FIX: Query takes a long time if you enable Batch Mode Adaptive Join in SQL Server 2017 - Microsoft Support
Last update date:
8/2/2023
Affected products:
SQL Server 2017 on Windows (all editions)
Affected releases:
build lower than 14.0.3162.1
Fixed releases:
14.0.3162.1
Description:
Symptoms
Assume that you use SQL Server 2017 with Batch Mode Adaptive Join enabled. When you run a query on a database with compatibility level 140, it may take more than 45 minutes to finish. However, the query is finished in about one second if you disable the feature by using the query hint DISABLE_BATCH_MODE_ADAPTIVE_JOINS. Note You need to enable trace flag 4199 or enable the database scoped configuration option QUERY_OPTIMIZER_HOTFIXES to apply this fix.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Resolution
This issue is fixed in the following cumulative update for SQL Server: Cumulative Update 15 for SQL Server 2017 About cumulative updates for SQL Server: Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server: Latest cumulative update for SQL Server 2017
References
Learn about the terminology that Microsoft uses to describe software updates.
