Frequently Asked Questions
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Can I run partial string matching Atlas Search queries?
Yes. The following Atlas Search operators support partial string matching queries:
Can I perform case-insensitive search with the wildcard or regex operator?
Yes. You can use the wildcard and regex operators with a custom analyzer to perform a case-insensitive search. You can define a custom analyzer with the following tokenizer and token filter to perform a wildcard case-insensitive search:
Does storedSource support case-insensitive collation on fields?
The Atlas Search index storedSource
option and $search returnStoredSource option are in preview, but can be
used in production applications. If there are any syntax or behavior
changes between the preview stage and general availability (GA), we
will proactively communicate before introducing any breaking changes.
The MongoDB Cloud Support team will help troubleshoot any issues
related to using this feature as part of your contract.
Yes. The Atlas Search storedSource option stores
original values. To perform case-insensitive operations after the
$search stage on the results returned using
returnStoredSource option, you
must set the default collation strength of your collection to 1 or
2 when you create it, and must not specify a different collation in
your queries and indexes.
Can I use the shard key to run Atlas Search queries on specific shard(s)?
No, you can't use the shard key to run Atlas Search queries on a specific shard or a subset of shards. In a sharded cluster environment, Atlas Search queries are scatter-gather queries that run on all the shards.