Reject regexp queries on the _index field. #46945
Merged
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We speculatively added support for
regexp
queries on the_index
field in #34089 (this functionality was not actually requested by a user). Supporting regex logic adds complexity to the_index
field for not much gain, so we would like to remove it.From an end-to-end test it turns out this functionality never even worked in the first place because of an error in how regex flags were interpreted! For this reason, we can remove support for
regexp
on_index
without a deprecation period.Relates to #46640.