Atlas Search Changelog

28 June 2024 Release

• Upgrades to Java 21.

  Note

  Atlas will reindex all of your existing Atlas Search indexes on the Atlas cluster in a rolling manner. The Atlas UI will display alerts that indicate the timing of your reindexing. Clusters not using separate search nodes might notice a temporary increase in disk and CPU utilization during reindexing. For clusters using separate search nodes, Atlas will temporarily deploy additional nodes for free for reindexing and there will be no downtime for swapping of indexes when the new index build completes.

  This upgrade provides the following benefits:

  • Indexes number and date values by default for sorting.

  • Indexes null and UUID values automatically if you enable dynamic mappings, which might increase the size of your index.

25 June 2024 Release

• Makes Search Nodes on Azure generally available for both your development and production deployments.

• Introduces Search Nodes support for multi-region and multi-cloud clusters as a Preview feature.

31 May 2024 Release

• Introduces Atlas Search Query Templates in the Search Tester, which makes querying easier with pre-written $search queries including conditional clauses like must and should, autocomplete for search-as-you-type experiences, faceting, and more. To learn more, see Run Atlas Search Queries.

• Introduces changes to the Atlas Search API endpoints. To learn more, see API Changelog for May 31 2024 Release.

10 May 2024 Release

• Truncates large stringFacet values.

07 May 2024 Release

• Fixes an issue where Atlas Search didn't include the _id field for some documents in the results when using returnStoredSource.

23 April 2024 Release

• Fixes an issue where Atlas Search triggered spurious initial syncs after certain mongod configuration changes.

• Rebuilds indexes where the definition version is missing.

28 March 2024 Release

• Fixes an issue where Atlas Search didn't generate results for searchAfter or searchBefore queries when scores were tied.

• Adds the ability to query and sort by null and UUID values.

05 March 2024 Release

• Re-enables sort pruning.

• Includes synonym queries in explain().

01 March 2024 Release

• Fixes an issue where sharded Atlas clusters running MongoDB v7.2.0 would return an error for $searchMeta stages that contain the facet collector.

14 February 2024 Release

• Supports running $searchMeta queries in the Search Tester. To learn more, see Run Atlas Search Queries.

17 January 2024 Release

• Supports retrieving $search results sequentially after or before a reference point, which you can specify using a token generated by the $meta keyword searchSequenceToken. To learn more, see Paginate the Results.

26 December 2023 Release

• Supports using equals, in, and range operators to perform exact matching and filtering on BSON strings indexed as the Atlas Search token type.

04 December 2023 Release

• Makes separate Search Nodes for AWS generally available for both your development and production deployments. To learn more, see Search Nodes Architecture.

• Deprecates knnVector type and knnBeta operator. Instead, you can now use the new vectorSearch index type and the $vectorSearch pipeline stage in both your development and production deployments. To learn more, see Atlas Vector Search Overview.

• Improves latency when there are no mixed types in the fields you use to sort the results.

• Introduces low-CPU search tiers.

23 October 2023 Release

• Introduces dedicated Search Nodes for Atlas Search as a Preview feature. This feature and the corresponding documentation might change at any time during the Preview period. To learn more, see Atlas Search Overview.

• Supports parallel queries across segments for dedicated search nodes to improve response times. To learn more, see Parallelize Query Execution Across Segments.

26 September 2023 Release

• Adds atlas deployments in the Atlas CLI so that you can work with Atlas Search and Atlas Vector Search throughout the entire software development lifecycle from your local environment to the cloud. To learn more, see Manage Local and Cloud Deployments from the Atlas CLI.

• Supports implicitly and explicitly sorting results by score.

13 September 2023 Release

• Supports custom analyzer configuration in the Atlas UI Visual Editor.

• Supports token type configuration in the Atlas UI Visual Editor.

30 August 2023 Release

• Performs system upgrade. You might notice some indexing and querying performance changes.

31 July 2023 Release

• Supports highlighting for fields if the fields are indexed under a parent field of type document for query predicates specified inside the embeddedDocument operator.

• Starts initial sync automatically in certain scenarios with sharding.

• Fixes a bug that caused changes to token field mapping to be ignored.

10 July 2023 Release

• Adds the sort option, which supports sorting in ascending or descending order on fields that you define in your Atlas Search index for sorting.

  Note

  Atlas Search sort option is available in sharded clusters only if you run MongoDB v6.0+.

• Limits the knnBeta operator as a top-level operator.

• Introduces the ability to perform text, wildcard, regular expression, fuzzy, and range searches on string fields by using the queryString operator.

• Improves performance of $search with $limit.

• For Atlas clusters running MongoDB 6.0.8 or later on M10 or higher clusters, introduces ability to create and manage Atlas Search indexes from mongosh and NodeJS driver.

  Note

  You can't use the mongosh command or driver helper methods to create, retrieve, edit, or delete Atlas Search indexes on M0, M2, or M5 Atlas clusters.

22 June 2023 Release

• Provides preview of vector search to store, index, and query vectors using Atlas Search.

14 June 2023 Release

• Adds support for restoring Atlas Search indexes from Cloud Backup snapshots of M10 or larger clusters.

07 June 2023 Release

• Supports tracking search terms in queries and viewing query analytics for tracked search terms in the Atlas UI for M10 or higher Atlas clusters.

26 May 2023 Release

• Adds the in operator, which performs a search for an array of values and returns documents where the value of the field equals any value in the specified array.

• Changes the operator option of the facet collector to be optional. facet queries that you specify without an operator run over all indexed documents.

25 April 2023 Release

• Adds scoreDetails boolean option to retrieve a detailed breakdown of the score for each document in the query results.

01 March 2023 Release

• Introduces the ability to edit your Atlas Search query in the Search Tester.

31 January 2023 Release

• Adds the following language analyzers:

  • lucene.polish

  • lucene.portuguese

  • lucene.smartcn

  • lucene.sorani

  • lucene.thai

  • lucene.turkish

• Adds the following token filters:

  • englishPossessive

  • flattenGraph

  • kStemming

  • porterStemming

  • spanishPluralStemming

  • stempel

  • wordDelimiterGraph

• Supports the number data type using the equals operator.

• Supports synonyms for sharded clusters.

25 January 2023 Release

• Supports the embeddedDocuments type in the Atlas Search visual editor configuration mode in the Atlas UI.

02 November 2022 Release

• Supports statically indexing arrays of strings as the autocomplete type and querying the indexed field using the autocomplete operator.

• Supports dynamically and statically indexing numbers in arrays and querying the indexed numbers in arrays using the range operator only.

• Supports dynamically and statically indexing dates in arrays and querying the indexed dates in arrays using the range operator only.

• Supports dynamically and statically indexing objectIds and arrays of objectIds and querying the indexed objectIds using the equals operator.

• Supports dynamically and statically indexing booleans and arrays of booleans and querying the booleans using the equals operator.

03 October 2022 Release

• Improves performance for storedSource.

02 August 2022 Release

• Upgrades to Atlas Search, which include the following:

  • Querying improvements

    • Supports \w, \W, \D, \s, and \S regular expressions in the regex query. However, Atlas Search doesn't return results for characters other than s, S, w, W, d, and D in the regex query. We recommend using backslashes according to regex standards.

    • Updates to email tokenizer top-level domains from the IANA Root Zone Database.

  • Highlighting improvements

    • Passage selector truncates long snippets to show a shorter snippet, which fixes the cause for queries failing when the passage is long.

  • Explain output for some queries might look different. If you use explain, verify that the changes don't break logic in your environment.

  In addition to the preceding list of changes, you might notice some indexing and querying performance changes.

• Introduces moreLikeThis operator to retrieve documents similar to one or more input documents.

07 June 2022 Release

• Supports the facet collector on sharded clusters running MongoDB 6.0 and later.

• Supports $search and $searchMeta stages inside $lookup and $unionWith sub-pipeline.

01 June 2022 Release

• Introduces embedded documents for $elemMatch-like searches.

  Note

  The Atlas Search embeddedDocuments index option, embeddedDocument operator, and embedded scoring option are in preview. When an Atlas Search index on a replica set or single MongoDB shard reaches Lucene's two billion document limit, Atlas Search doesn't index new documents or apply updates to existing documents for that index. A solution to accommodate this limitation will be in place when this feature is generally available. To troubleshoot any issues related to using this feature, contact Support.

27 April 2022 Release

• Improves performance of stored source fields for faster post-aggregation stages.

• Improves precision of replication lag metrics reporting.

19 April 2022 Release

• Optimizes internal batching to improve stored source query performance when your query matches a large number of documents (5,000 or more).

31 March 2022 Release

• Introduces an option in the index definition for storing fields on Atlas Search and $search option for returning stored fields.

09 March 2022 Release

• Introduces a new Project Search Index Editor role to create, view, edit, and delete Atlas Search indexes using the Atlas UI or API.

• Serves queries using your last valid index if new index definition is invalid.

• Removes Lucene's default clause limit of 1024 for BooleanQuery on dedicated clusters.

  Note

  We are extending support for faceting on numeric and date fields using the number and date types from August to September 2022. You must migrate to the numberFacet and dateFacet types in all index definitions for faceting on numeric and date fields, respectively.

01 March 2022 Release

• Adds the numberFacet and dateFacet data types for running facet queries on number and date fields respectively.

  Note

  We are extending support for faceting on numeric and date fields using the number and date types from August to September 2022. You must migrate to the numberFacet and dateFacet types in all index definitions for faceting on numeric and date fields, respectively.

26 January 2022 Release

• Adds reverse token filter, which reverses each string token.

10 December 2021 Release

• Adds support for Gaussian decay expressions, which decay, or reduce, document scores by multiplying at a specified rate.

03 November 2021 Release

• Adds asciiFolding token filter for converting alphabetic, numeric, and symbolic unicode characters that are not in the Basic Latin Unicode block to their ASCII equivalents.

28 September 2021 Release

Autocomplete improvements in this release:

• Adds support for analyzers in the index definition for autocomplete.

• Boosts exact matches in autocomplete operator.

• Adds rightEdgeGram tokenization strategy to create edgeGram-like tokens starting at the right side of words (instead of the left side).

Bug fixes in this release:

• Fixes objectId highlighting error.

07 Septermber 2021 Release

• Allows indexes to enter a recovering state and remain available after encountering certain replication errors.

13 July 2021 Release

• Adds support for synonyms, which can be defined in a source collection and mapped to search indexes via the Atlas API.

01 June 2021 Release

• Supports wildcard path for highlight.

05 April 2021 Release

• Adds stopword token filter for removing tokens that match the specified stop words.

19 March 2021 Release

• Adds additional language analyzers, token filters, and tokenizers.

• Adds support for function scores, which allows you to alter the relevance score of a document using a numeric field in the same document.

05 February 2021 Release

• Supports explain for $search queries.

16 January 2021 Release

• Fixes an issue with highlighting raising errors when combined with ObjectID equality operators.

14 January 2021 Release

• Improves performance of initial sync indexing.

15 December 2020 Release

• Adds maxNumPassages and maxCharsToExamine for highlight.

19 November 2020 Release

• Improves performance of steady state indexing.

13 November 2020 Release

• Fixes a bug in custom analyzers where only the first charMap character filter was being executed.

1 October 2020 Release

• Removes downtime requirement when rebuilding modified index definitions.

2 September 2020 Release

• Adds custom analyzers for index definitions and search queries.

23 August 2020 Release

• Adds support for wildcard path.

9 June 2020 Release

• Releases Atlas Search to general availability.

• Adds support for data types boolean and objectId.

18 May 2020 Release

• Adds a new index option to exclude the norms field, allowing a search index to ignore field length when scoring search results.

• Adds the tokenOrder option to the autocomplete operator, supporting unordered terms in search queries.

• Improves error messages to facilitate query debugging, including eliminating stack traces and other Java-specific messages.

30 April 2020 Release

• Adds support for geospatial queries, including:

  • A new geo data type for indexing geographic point and shape coordinates.

  • Two new operators, geoWithin and geoShape, to support queries on geospatial data, such as points and polygons.

• Adds autocomplete features to support better search-as-you-type functionality, including:

  • A new autocomplete operator and index type.

  • Analyzer-agnostic diacritic folding of field values.

  • Scoring options, such as boost and constant.

  • Compound queries that combine autocomplete with other $search operators.

  • n-grams/shingles and edge n-grams from analyzed text.