I got this:

"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."

This came after having created a very long command which includes the IN clauses with thousands of primary keys.

I just had 38026 primary keys in that one. :)