feat: Add UUID and TIME_UUID as feature types (#5885) by soooojinlee · Pull Request #5951 · feast-dev/feast · GitHub

What this PR does / why we need it:

Adds UUID and TIME_UUID as native Feast feature types, resolving #5885. Currently UUID values must be stored as STRING, which loses type semantics, prevents backend-specific features (e.g. Cassandra timeuuid range queries), and makes PostgreSQL uuid columns infer as STRING. This PR enables users to declare UUID features with Field(name="user_id", dtype=Uuid) and receive uuid.UUID objects from get_online_features().to_dict().

Design Decisions

Why two types (UUID vs TIME_UUID)?
The issue author explicitly requested distinguishing time-based UUID (uuid1) and random UUID (uuid4). Both serialize
identically to string in proto, but separate types allow expressing intent in feature definitions and enable future backend-specific optimizations.

Why dedicated proto fields (uuid_val, time_uuid_val)?
Following the pattern established by SET types (PR #5888) and UNIX_TIMESTAMP (which reuses int64/Int64List), we add dedicated oneof fields that reuse existing proto scalar types (string and StringList). This allows WhichOneof("val") to identify UUID types directly from the proto message, without requiring a side-channel.

Backward compatibility for data stored before this change:
OnlineResponse accepts an optional feature_types dict. When data was previously stored as string_val, this metadata enables feast_value_type_to_python_type() to convert it to uuid.UUID. New materializations use uuid_val/time_uuid_val and are identified automatically.

Changes

Layer	Files	Description
Proto	Value.proto, generated _pb2.py/_pb2.pyi	Add UUID=30, TIME_UUID=31, UUID_LIST=32, TIME_UUID_LIST=33 to ValueType.Enum; add uuid_val, time_uuid_val, uuid_list_val, time_uuid_list_val to Value.oneof
Type system	value_type.py, types.py	Add UUID, TIME_UUID, UUID_LIST, TIME_UUID_LIST enums and Uuid/TimeUuid aliases
Type conversion	type_map.py	Add mappings to ~11 conversion dicts (proto, PyArrow, pandas, PostgreSQL, Couchbase, Snowflake); switch from string_val to uuid_val; add PROTO_VALUE_TO_VALUE_TYPE_MAP entries for UUID fields
Online response	online_response.py, online_store.py, feature_store.py, utils.py	Pass feature_types metadata for backward-compatible deserialization
ODFV	on_demand_feature_view.py	Add UUID/TIME_UUID sample values for schema inference

Backward Compatibility

Data previously stored as string_val still deserializes correctly via the feature_types side-channel
New materializations use dedicated uuid_val/time_uuid_val proto fields
feast_value_type_to_python_type(v) without feature_type now returns uuid.UUID for uuid_val fields (previously returned plain string for string_val)
PostgreSQL uuid columns now infer as ValueType.UUID (previously ValueType.STRING)
Go SDK: proto changes compile without errors; UUID handling logic is not implemented (out of scope)

Tests

test_types.py: Uuid/TimeUuid ↔ ValueType bidirectional conversion, Array types
test_type_map.py: Proto roundtrip with uuid_val, uuid.UUID object return, backward compatibility for string_val, UUID list roundtrip, PostgreSQL mapping
All 78 unit tests passing
ruff lint and format checks passing

@soooojinlee , thanks so much for putting this together! Can you rebase to bring this PR up to date?

@soooojinlee , can you also add support for UUID_SET and TIME_UUID_SET?

@soooojinlee , can you also update the docs with the newly supported types?

@soooojinlee , can you also add support for UUID_SET and TIME_UUID_SET?

@soooojinlee , can you also update the docs with the newly supported types?

I added UUID_SET / TIME_UUID_SET support and updated the type system documentation as requested in here 41cfe7e

@soooojinlee please resolve the conflicts

@soooojinlee , can we update this and merge it before the VALUE_SET and VALUE_LIST change?

Looks good. Thanks!

Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io>

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io>

Add uuid_val, time_uuid_val, uuid_list_val, time_uuid_list_val as dedicated oneof fields in the Value proto message, replacing the previous reuse of string_val/string_list_val. This allows UUID types to be identified from the proto field alone without requiring a feature_types side-channel. Backward compatibility is maintained for data previously stored as string_val. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io>

Signed-off-by: soojin <soojin@dable.io>

Add Set(Uuid) and Set(TimeUuid) as feature types with full roundtrip support, backward compatibility, and documentation for all UUID types. Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

…ype mappings Keep PDF_BYTES=30 and IMAGE_BYTES=31 at their upstream values instead of renumbering them. Shift UUID types to 32-37 in both proto and Python enum. Also add missing SET type entries in _convert_value_type_str_to_value_type(), convert_array_column(), and _get_sample_values_by_type() for completeness. Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

The comment claimed Sets do not support UUID/TimeUuid but the code intentionally allows them. Updated to reflect actual behavior. Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

…o top Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

…rialization Return UUID proto fields as plain strings instead of falling through to feast_value_type_to_python_type which converts them to uuid.UUID objects that are not JSON-serializable, causing TypeError during HTTP transport. Signed-off-by: soojin <soojin@dable.io>

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io>

Add [misc] error code to type: ignore comments in UUID list/set proto conversion to satisfy mypy's stricter checking. Signed-off-by: Soojin Lee <soooojin.lee@gmail.com> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io>

…-dev#5951) * feat: Add UUID and TIME_UUID as feature types (feast-dev#5885) Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io> * test: Add unit tests for UUID type support Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io> * style: Fix ruff lint and formatting issues Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io> * feat: Add dedicated UUID/TIME_UUID proto fields to Value.proto Add uuid_val, time_uuid_val, uuid_list_val, time_uuid_list_val as dedicated oneof fields in the Value proto message, replacing the previous reuse of string_val/string_list_val. This allows UUID types to be identified from the proto field alone without requiring a feature_types side-channel. Backward compatibility is maintained for data previously stored as string_val. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io> * fix: Address review feedback for UUID type support Signed-off-by: soojin <soojin@dable.io> * fix: Address review feedback for UUID type support Signed-off-by: soojin <soojin@dable.io> * fix: Address review feedback Signed-off-by: soojin <soojin@dable.io> * fix: Convert uuid.UUID to string for Arrow and JSON serialization Signed-off-by: soojin <soojin@dable.io> * feat: Add UUID_SET/TIME_UUID_SET support and update type system docs Add Set(Uuid) and Set(TimeUuid) as feature types with full roundtrip support, backward compatibility, and documentation for all UUID types. Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * fix: Preserve PDF_BYTES/IMAGE_BYTES enum values and add missing SET type mappings Keep PDF_BYTES=30 and IMAGE_BYTES=31 at their upstream values instead of renumbering them. Shift UUID types to 32-37 in both proto and Python enum. Also add missing SET type entries in _convert_value_type_str_to_value_type(), convert_array_column(), and _get_sample_values_by_type() for completeness. Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * fix: Correct misleading comment in Set.__init__ The comment claimed Sets do not support UUID/TimeUuid but the code intentionally allows them. Updated to reflect actual behavior. Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * refactor: Extract UUID Arrow conversion into helper and move import to top Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * fix: Handle UUID types in _proto_value_to_transport_value for JSON serialization Return UUID proto fields as plain strings instead of falling through to feast_value_type_to_python_type which converts them to uuid.UUID objects that are not JSON-serializable, causing TypeError during HTTP transport. Signed-off-by: soojin <soojin@dable.io> * chore: Regenerate protobuf files with UUID type support Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io> * fix: Fix mypy type ignore comments for UUID collection conversions Add [misc] error code to type: ignore comments in UUID list/set proto conversion to satisfy mypy's stricter checking. Signed-off-by: Soojin Lee <soooojin.lee@gmail.com> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io> --------- Signed-off-by: soojin <soojin@dable.io> Signed-off-by: Soojin Lee <soooojin.lee@gmail.com> Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: yuanjun220 <1069645408@qq.com>

# [0.61.0](v0.60.0...v0.61.0) (2026-04-07) ### Bug Fixes * Add grpcio dependency group to transformation server Dockerfile ([2c2150a](2c2150a)) * Add https readiness check for rest-registry tests ([ea85e63](ea85e63)) * Add website build check for PRs and fix blog frontmatter YAML error ([#6079](#6079)) ([30a3a43](30a3a43)) * Added missing jackc/pgx/v5 entries ([94ad0e7](94ad0e7)) * Added MLflow metric charts across feature selection ([#6080](#6080)) ([a403361](a403361)) * Check duplicate names for feature view across types ([#5999](#5999)) ([95b9af8](95b9af8)) * Fix integration tests ([#6046](#6046)) ([02d5548](02d5548)) * Fix missing error handling for resource_counts endpoint ([d9706ce](d9706ce)) * Fix non-specific label selector on metrics service ([a1a160d](a1a160d)) * fix path feature_definitions.py ([7d7df68](7d7df68)) * Fix regstry Rest API tests intermittent failure ([d53a339](d53a339)) * Fixed IntegrityError on SqlRegistry ([#6047](#6047)) ([325e148](325e148)) * Fixed intermittent failures in get_historical_features ([c335ec7](c335ec7)) * Fixed pre-commit check ([114b7db](114b7db)) * Fixed the intermittent FeatureViewNotFoundException ([661ecc7](661ecc7)) * Fixed uv cache permission error for docker build on mac ([ad807be](ad807be)) * Fixes a `PydanticDeprecatedSince20` warning for trino_offline_store ([#5991](#5991)) ([abfd18a](abfd18a)) * Handle existing RBAC role gracefully in namespace registry ([b46a62b](b46a62b)) * Ignore ipynb files during apply ([#6151](#6151)) ([4ea123d](4ea123d)) * Integration test failures ([#6040](#6040)) ([9165870](9165870)) * Mount TLS volumes for init container ([080a9b5](080a9b5)) * **postgres:** Use end_date in synthetic entity_df for non-entity retrieval ([#6110](#6110)) ([088a802](088a802)), closes [#6066](#6066) * Ray offline store tests are duplicated across 3 workflows ([54f705a](54f705a)) * Reenable tests ([#6036](#6036)) ([82ee7f8](82ee7f8)) * SSL/TLS mode by default for postgres connection ([4844488](4844488)) * Use commitlint pre-commit hook instead of a separate action ([35a81e7](35a81e7)) ### Features * Add Claude Code agent skills for Feast ([#6081](#6081)) ([1e5b60f](1e5b60f)), closes [#5976](#5976) [#6007](#6007) * Add complex type support (Map, JSON, Struct) with schema validation ([#5974](#5974)) ([1200dbf](1200dbf)) * Add decimal to supported feature types ([#6029](#6029)) ([#6226](#6226)) ([cff6fbf](cff6fbf)) * Add feast apply init container to automate registry population on pod start ([#6106](#6106)) ([6b31a43](6b31a43)) * Add feature view versioning support to PostgreSQL and MySQL online stores ([#6193](#6193)) ([940e0f0](940e0f0)), closes [#6168](#6168) [#6169](#6169) [#2728](#2728) * Add materialization, feature freshness, request latency, and push metrics to feature server ([2c6be18](2c6be18)) * Add metadata statistics to registry api ([ef1d4fc](ef1d4fc)) * Add non-entity retrieval support for ClickHouse offline store ([4d08ddc](4d08ddc)), closes [#5835](#5835) * Add OnlineStore for MongoDB ([#6025](#6025)) ([bf4e3fa](bf4e3fa)), closes [golang/go#74462](golang/go#74462) * Add Oracle DB as Offline store in python sdk & operator ([#6017](#6017)) ([9d35368](9d35368)) * Add RBAC aggregation labels to FeatureStore ClusterRoles ([daf77c6](daf77c6)) * Add ServiceMonitor auto-generation for Prometheus discovery ([#6126](#6126)) ([56e6d21](56e6d21)) * Add typed_features field to grpc write request (([#6117](#6117)) ([#6118](#6118)) ([eeaa6db](eeaa6db)), closes [#6116](#6116) * Add UUID and TIME_UUID as feature types ([#5885](#5885)) ([#5951](#5951)) ([5d6e311](5d6e311)) * Add version indicators to lineage graph nodes ([#6187](#6187)) ([73805d3](73805d3)) * Add version tracking to FeatureView ([#6101](#6101)) ([ed4a4f2](ed4a4f2)) * Added Agent skills for AI Agents ([#6007](#6007)) ([99008c8](99008c8)) * Added CodeQL SAST scanning and detect-secrets pre-commit hook ([547b516](547b516)) * Added odfv transformations metrics ([8b5a526](8b5a526)) * Adding optional name to Aggregation (feast-dev[#5994](#5994)) ([#6083](#6083)) ([56469f7](56469f7)) * Created DocEmbedder class ([#5973](#5973)) ([0719c06](0719c06)) * Extended OIDC support to extract groups & namespaces and token injection with multiple methods ([#6089](#6089)) ([7c04026](7c04026)) * Feature Server High-Availability on Kubernetes ([#6028](#6028)) ([9c07b4c](9c07b4c)), closes [Hi#Availability](https://github.com/Hi/issues/Availability) [Hi#Availability](https://github.com/Hi/issues/Availability) * **go:** Implement metrics and tracing for http and grpc servers ([#5925](#5925)) ([2b4ec9a](2b4ec9a)) * Horizontal scaling support to the Feast operator ([#6000](#6000)) ([3ec13e6](3ec13e6)) * Making feature view source optional (feast-dev[#6074](#6074)) ([#6075](#6075)) ([76917b7](76917b7)) * Replace ORJSONResponse with Pydantic response models for faster JSON serialization ([65cf03c](65cf03c)) * Support arm docker build ([#6061](#6061)) ([1e1f5d9](1e1f5d9)) * Support distinct count aggregation [[#6116](#6116)] ([3639570](3639570)) * Support HTTP in MCP ([#6109](#6109)) ([e72b983](e72b983)) * Support nested collection types (Array/Set of Array/Set) ([#5947](#5947)) ([#6132](#6132)) ([ab61642](ab61642)) * Support podAnnotations on Deployment pod template ([1b3cdc1](1b3cdc1)) * Use orjson for faster JSON serialization in feature server ([6f5203a](6f5203a)) * Utilize date partition column in BigQuery ([#6076](#6076)) ([4ea9b32](4ea9b32)) ### Performance Improvements * Online feature response construction in a single pass over read rows ([113fb04](113fb04)) * Optimize protobuf parsing in Redis online store ([#6023](#6023)) ([59dfdb8](59dfdb8)) * Optimize timestamp conversion in _convert_rows_to_protobuf ([33a2e95](33a2e95)) * Parallelize DynamoDB batch reads in sync online_read ([#6024](#6024)) ([9699944](9699944)) * Remove redundant entity key serialization in online_read ([d87283f](d87283f))

# [0.62.0](v0.61.0...v0.62.0) (2026-04-08) ### Bug Fixes * Added missing jackc/pgx/v5 entries ([94ad0e7](94ad0e7)) * Fix missing error handling for resource_counts endpoint ([d9706ce](d9706ce)) * fix path feature_definitions.py ([7d7df68](7d7df68)) * Fix regstry Rest API tests intermittent failure ([d53a339](d53a339)) * Fixed intermittent failures in get_historical_features ([c335ec7](c335ec7)) * Fixed the intermittent FeatureViewNotFoundException ([661ecc7](661ecc7)) * Handle existing RBAC role gracefully in namespace registry ([b46a62b](b46a62b)) * Ignore ipynb files during apply ([#6151](#6151)) ([4ea123d](4ea123d)) * Mount TLS volumes for init container ([080a9b5](080a9b5)) * **postgres:** Use end_date in synthetic entity_df for non-entity retrieval ([#6110](#6110)) ([088a802](088a802)), closes [#6066](#6066) * SSL/TLS mode by default for postgres connection ([4844488](4844488)) * Sync v0.61-branch so v0.61.0 tag is reachable from master ([af66878](af66878)) ### Features * Add Claude Code agent skills for Feast ([#6081](#6081)) ([1e5b60f](1e5b60f)), closes [#5976](#5976) [#6007](#6007) * Add decimal to supported feature types ([#6029](#6029)) ([#6226](#6226)) ([cff6fbf](cff6fbf)) * Add feast apply init container to automate registry population on pod start ([#6106](#6106)) ([6b31a43](6b31a43)) * Add feature view versioning support to PostgreSQL and MySQL online stores ([#6193](#6193)) ([940e0f0](940e0f0)), closes [#6168](#6168) [#6169](#6169) [#2728](#2728) * Add metadata statistics to registry api ([ef1d4fc](ef1d4fc)) * Add Oracle DB as Offline store in python sdk & operator ([#6017](#6017)) ([9d35368](9d35368)) * Add RBAC aggregation labels to FeatureStore ClusterRoles ([daf77c6](daf77c6)) * Add ServiceMonitor auto-generation for Prometheus discovery ([#6126](#6126)) ([56e6d21](56e6d21)) * Add typed_features field to grpc write request (([#6117](#6117)) ([#6118](#6118)) ([eeaa6db](eeaa6db)), closes [#6116](#6116) * Add UUID and TIME_UUID as feature types ([#5885](#5885)) ([#5951](#5951)) ([5d6e311](5d6e311)) * Add version indicators to lineage graph nodes ([#6187](#6187)) ([73805d3](73805d3)) * Add version tracking to FeatureView ([#6101](#6101)) ([ed4a4f2](ed4a4f2)) * Added Agent skills for AI Agents ([#6007](#6007)) ([99008c8](99008c8)) * Added odfv transformations metrics ([8b5a526](8b5a526)) * Created DocEmbedder class ([#5973](#5973)) ([0719c06](0719c06)) * Extended OIDC support to extract groups & namespaces and token injection with multiple methods ([#6089](#6089)) ([7c04026](7c04026)) * Replace ORJSONResponse with Pydantic response models for faster JSON serialization ([65cf03c](65cf03c)) * Support distinct count aggregation [[#6116](#6116)] ([3639570](3639570)) * Support HTTP in MCP ([#6109](#6109)) ([e72b983](e72b983)) * Support nested collection types (Array/Set of Array/Set) ([#5947](#5947)) ([#6132](#6132)) ([ab61642](ab61642)) * Support podAnnotations on Deployment pod template ([1b3cdc1](1b3cdc1)) * Utilize date partition column in BigQuery ([#6076](#6076)) ([4ea9b32](4ea9b32)) ### Performance Improvements * Online feature response construction in a single pass over read rows ([113fb04](113fb04))

soooojinlee requested review from a team as code owners February 8, 2026 14:55

soooojinlee requested review from ejscribner, robhowley and tokoko and removed request for a team February 8, 2026 14:56

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ntkathole force-pushed the feat/add-uuid-feature-types branch from 2c56521 to 1fd106a Compare February 11, 2026 04:44

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soooojinlee mentioned this pull request Mar 19, 2026

feat: Support nested collection types (Array/Set of Array/Set) (#5947) #6132

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soooojinlee and others added 15 commits April 1, 2026 18:01

feat: Add UUID and TIME_UUID as feature types (feast-dev#5885 )

6991f44

Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io>

test: Add unit tests for UUID type support

55065f2

Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io>

style: Fix ruff lint and formatting issues

53c2513

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io>

fix: Address review feedback for UUID type support

8e15939

Signed-off-by: soojin <soojin@dable.io>

fix: Address review feedback for UUID type support

a098c3c

Signed-off-by: soojin <soojin@dable.io>

fix: Address review feedback

6c9ba63

Signed-off-by: soojin <soojin@dable.io>

fix: Convert uuid.UUID to string for Arrow and JSON serialization

ac7a61d

Signed-off-by: soojin <soojin@dable.io>

fix: Correct misleading comment in Set.__init__

5d637c5

The comment claimed Sets do not support UUID/TimeUuid but the code intentionally allows them. Updated to reflect actual behavior. Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

refactor: Extract UUID Arrow conversion into helper and move import t…

e4b0a86

…o top Signed-off-by: soojin <soojin@dable.io> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

chore: Regenerate protobuf files with UUID type support

3c07e12

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: soojin <soojin@dable.io>

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ntkathole merged commit 5d6e311 into feast-dev:master Apr 1, 2026
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feat: Add UUID and TIME_UUID as feature types (#5885) by soooojinlee · Pull Request #5951 · feast-dev/feast · GitHub

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feat: Add UUID and TIME_UUID as feature types (#5885) - #5951

feat: Add UUID and TIME_UUID as feature types (#5885)#5951ntkathole merged 15 commits intofeast-dev:masterfeast-dev/feast:masterfrom soooojinlee:feat/add-uuid-feature-typessoooojinlee/feast:feat/add-uuid-feature-typesCopy head branch name to clipboard

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feat: Add UUID and TIME_UUID as feature types (#5885)#5951
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