Undefined values in indexed queries

[quick mortar]

How are undefined values handled in an indexed query? I need to write a query like this:

.eq(value).eq(undefined).eq(undefined).eq(value)

Do these undefined values impact query performance in negative way, or are they treated the same as other data types in Convex?

[unique goblet]

Thanks for posting in #1088161997662724167.
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