Query:
update mytable set mycol = null where id in ( 583048, 583049, ... (50000 more) ) Message:
The query processor ran out of internal resources and could not produce a query plan. This is a rare event and only expected for extremely complex queries or queries that reference a very large number of tables or partitions. Please simplify the query. If you believe you have received this message in error, contact Customer Support Services for more information.
My query is very simple, how should I write it so it works ok?
12 Answers
Insert the list of values into a #temp table then use in on that.
As explained in this answer a large number of IN values can cause it to run out of stack as they get expanded to OR
If you find this error in SQL Server 2016 or later then try to change the database compatibility level to a lower version 120 or 110, etc. (link)
