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Backwards Compatibility:
Fully Compatible
Backport Requested:

v5.2
Sprint:
QO 2021-12-27, QO 2022-01-10, QO 2022-01-24, QO 2022-02-07, QO 2022-02-21, QO 2022-03-07
Linked BF Score:
179

Allow $search to be used as target of $lookup and $unionWith.

This will provide a better user experience in $search and allow for compatibility with a wider range of use cases.

is documented by

DOCS-15254 Investigate changes in SERVER-60800: Allow $search in $lookup/$unionWith

is related to

SERVER-40949 Prevent $lookup into a $sb Subpipeline

SERVER-48120 Optimize a $sort after a $unionWith

SERVER-65808 $search as subpipeline of $lookup with localField+foreignField is not supported

related to

SERVER-71036 Consider resolving variables inside $search before forwarding to mongot

SERVER-62973 Investigate/consider making $$SEARCH_META not global and scoped to individual pipelines

SERVER-63816 Extend non-correlated pipeline prefix caching optimization to $search in $lookup stage

SERVER-63845 Separate interface to get set of referenced variables from DocumentSource::getDependencies()

(3 related to)

Participants:: Charlie Swanson, Daniele Tassone, Githook User, Pawel Terlecki, Ruslan Abdulkhalikov, Steve Tarzia