feat: Kickoff Transformation implementationtransformation code base by HaoXuAI · Pull Request #5181 · feast-dev/feast

HaoXuAI · 2025-03-22T22:25:47Z

What this PR does / why we need it:

Created a Transformation interface. it still works with the current pandas_transformation, python_transformation etc.

The next step is refactor the BatchMaterializationEngine to make it works for both Materialization and Transformation.

Which issue(s) this PR fixes:

#4584
#4277 (comment)
#4696

Misc

Signed-off-by: HaoXuAI <[email protected]>

HaoXuAI · 2025-03-22T22:26:58Z

Reference comment: #5130 (comment)

HaoXuAI · 2025-03-22T22:34:55Z

One unstable unit test seems to be related to HF @franciscojavierarceo :
FAILED sdk/python/tests/unit/test_on_demand_python_transformation.py::TestOnDemandTransformationsWithWrites::test_docling_transform - huggingface_hub.errors.LocalEntryNotFoundError: An error happened while trying to locate the file on the Hub and we cannot find the requested files in the local cache. Please check your connection and try again or make sure your Internet connection is on.

And rerun got new error:
FAILED sdk/python/tests/unit/test_on_demand_python_transformation.py::TestOnDemandTransformationsWithWrites::test_docling_transform - TypeError: a bytes-like object is required, not 'list

franciscojavierarceo · 2025-03-22T22:58:33Z

Got it, I can make a patch for that. 👍

HaoXuAI · 2025-03-22T23:04:59Z

Got it, I can make a patch for that. 👍

No rush, take your time. This pr is ready for review now :)

franciscojavierarceo · 2025-03-23T00:48:05Z

sdk/python/feast/on_demand_feature_view.py

    ) -> dict[str, Union[list[Any], Any]]:
        rand_dict_value: dict[ValueType, Union[list[Any], Any]] = {
            ValueType.BYTES: [str.encode("hello world")],
-            ValueType.PDF_BYTES: [


This is what's making the unit tests fail.

This is used in infer_features to validate the function schema / types actually.

Ah I think I accidentally delete it when resolve merge conflict. let me add it back

franciscojavierarceo · 2025-03-23T00:48:56Z

sdk/python/feast/on_demand_feature_view.py

            name=name if name is not None else user_function.__name__,
            sources=sources,
            schema=schema,
-            feature_transformation=transformation,


shouldn't we keep this to be backwards compatible?

It is backwards compatible. I put the feature_transformation extraction logic inside the OnDemandFeatureView initialization, since the decorator doesn't pass in the feature_transformation param.
So user can do:

@demand_feature_view(...) def udf()...

or

odfv = OnDemandFeatureView(feature_transformation=Transformation(...))`

franciscojavierarceo · 2025-03-23T00:50:29Z

sdk/python/feast/transformation/base.py

+from feast.transformation.mode import TransformationMode
+
+
+class Transformation(ABC):


nit: I'd add a docstring here. ChatGPT should be a nice friend.

That's good point

franciscojavierarceo · 2025-03-23T00:51:24Z

sdk/python/feast/transformation/base.py

+    owner: Optional[str] = "",
+):
+    def mainify(obj):
+        # Needed to allow dill to properly serialize the udf. Otherwise, clients will need to have a file with the same


Hmm, we encountered some serialization issues with dill in the past. @Rostifar do you remember what they were?

have dill issue as well. Created a new issue for it:
#5182

franciscojavierarceo · 2025-03-23T00:55:48Z

sdk/python/feast/transformation/python_transformation.py

                    )
+                inferred_type = type(feature_value[0])
                inferred_value = feature_value[0]
-                if singleton and isinstance(inferred_value, list):


I just added this FYI as it's an edge case I didn't consider before, so please feel free to add it back in!

strange I didn't modify this. not sure why it sneak in

franciscojavierarceo

this look great! some small nits and some notes about fixing stuff I recently added which will fix the unit tests. otherwise looks awesome. 👏🚀🤠

Signed-off-by: HaoXuAI <[email protected]>

HaoXuAI · 2025-03-23T05:02:48Z

this look great! some small nits and some notes about fixing stuff I recently added which will fix the unit tests. otherwise looks awesome. 👏🚀🤠

good catch. thanks!

Signed-off-by: HaoXuAI <[email protected]>

HaoXuAI · 2025-03-23T06:46:50Z

@franciscojavierarceo finally passed all tests!

franciscojavierarceo · 2025-03-23T11:06:15Z

@franciscojavierarceo finally passed all tests!

franciscojavierarceo

Awesome work @HaoXuAI 🚀🚀🚀

Probably we can update the docs in a follow up PR before the next release?

# [0.48.0](v0.47.0...v0.48.0) (2025-04-07) ### Bug Fixes * Enhance integration logos display and styling in the UI ([#5221](#5221)) ([5799257](5799257)) * Fix space typo in push.md docs ([#5184](#5184)) ([81677b2](81677b2)) * Fixed integration tests for qdrant and milvus ([#5224](#5224)) ([d6b080d](d6b080d)) * Formatting trino ([760ec0e](760ec0e)) * Multiple fixes in retrieval of online documents ([#5168](#5168)) ([66ddd3e](66ddd3e)) * Operator route creation for Feast UI in OpenShift ([e3946b4](e3946b4)) * Remove entity_rows parameter from retrieve_online_documents_v2 call ([#5225](#5225)) ([2a2e304](2a2e304)) * Styling ([#5222](#5222)) ([34c393c](34c393c)) * typo in the chart ([bd3448b](bd3448b)) * Update milvus-quickstart and feature_store.yaml with correct Milvus Config ([#5200](#5200)) ([306acca](306acca)) * Update Qdrant online store paths in repo_config.py ([#5207](#5207)) ([ab35b0b](ab35b0b)), closes [#5206](#5206) * Update the doc ([#5194](#5194)) ([726464e](726464e)) * Updated the operator-rabc example to test RBAC from a Kubernete pod ([#5147](#5147)) ([d23a1a5](d23a1a5)) ### Features * add `real`(float32) type for trino offline store ([#4749](#4749)) ([0947f96](0947f96)) * Add async DynamoDB timeout and retry configuration ([#5178](#5178)) ([2f3bcf5](2f3bcf5)) * Add CronJob capability to the Operator (feast apply & materialize-incremental) ([#5217](#5217)) ([285c0dc](285c0dc)) * Add RAG tutorial and Use Cases documentation ([#5226](#5226)) ([99f4004](99f4004)) * Added CLI for features, get historical and online features ([#5197](#5197)) ([4ab9f74](4ab9f74)) * Added export support in feast UI ([#5198](#5198)) ([b079553](b079553)) * Added global registry search support in Feast UI ([#5195](#5195)) ([f09ea49](f09ea49)) * Added UI for Features list ([#5192](#5192)) ([cc7fd47](cc7fd47)) * Adding blog on RAG with Milvus ([#5161](#5161)) ([b9e2e6c](b9e2e6c)) * Adding Docling RAG demo ([#5109](#5109)) ([569404b](569404b)) * Allow transformations on writes to output list of entities ([#5209](#5209)) ([955521a](955521a)) * Cache get_any_feature_view results ([#5175](#5175)) ([924b8a3](924b8a3)) * Clickhouse offline store ([#4725](#4725)) ([86794c2](86794c2)) * Enable keyword search for Milvus ([#5199](#5199)) ([ac44967](ac44967)) * Enable transformations on PDFs ([#5172](#5172)) ([3674971](3674971)) * Enable users to use Entity Query as CTE during historical retrieval ([#5202](#5202)) ([fe69eaf](fe69eaf)) * helm support more deployment config ([d575372](d575372)) * Improved CLI file structuring ([#5201](#5201)) ([972ed34](972ed34)) * Kickoff Transformation implementationtransformation code base ([#5181](#5181)) ([0083303](0083303)) * Make keep-alive timeout configurable for async DynamoDB connections ([#5167](#5167)) ([7f3e528](7f3e528)) * Operator mounts the odh-trusted-ca-bundle configmap when deployed on RHOAI or ODH ([d4d7b0d](d4d7b0d)) * Spark Transformation ([#5185](#5185)) ([be3d85c](be3d85c))

…east-dev#5181) * transformation code base Signed-off-by: HaoXuAI <[email protected]> * add back master change to resovle unit test error Signed-off-by: HaoXuAI <[email protected]> * add back master change to resovle unit test error Signed-off-by: HaoXuAI <[email protected]> * fix linthing Signed-off-by: HaoXuAI <[email protected]> * fix linthing Signed-off-by: HaoXuAI <[email protected]> * add back master change to resovle unit test error Signed-off-by: HaoXuAI <[email protected]> --------- Signed-off-by: HaoXuAI <[email protected]> Signed-off-by: Jacob Weinhold <[email protected]>

# [0.48.0](feast-dev/feast@v0.47.0...v0.48.0) (2025-04-07) ### Bug Fixes * Enhance integration logos display and styling in the UI ([feast-dev#5221](feast-dev#5221)) ([5799257](feast-dev@5799257)) * Fix space typo in push.md docs ([feast-dev#5184](feast-dev#5184)) ([81677b2](feast-dev@81677b2)) * Fixed integration tests for qdrant and milvus ([feast-dev#5224](feast-dev#5224)) ([d6b080d](feast-dev@d6b080d)) * Formatting trino ([760ec0e](feast-dev@760ec0e)) * Multiple fixes in retrieval of online documents ([feast-dev#5168](feast-dev#5168)) ([66ddd3e](feast-dev@66ddd3e)) * Operator route creation for Feast UI in OpenShift ([e3946b4](feast-dev@e3946b4)) * Remove entity_rows parameter from retrieve_online_documents_v2 call ([feast-dev#5225](feast-dev#5225)) ([2a2e304](feast-dev@2a2e304)) * Styling ([feast-dev#5222](feast-dev#5222)) ([34c393c](feast-dev@34c393c)) * typo in the chart ([bd3448b](feast-dev@bd3448b)) * Update milvus-quickstart and feature_store.yaml with correct Milvus Config ([feast-dev#5200](feast-dev#5200)) ([306acca](feast-dev@306acca)) * Update Qdrant online store paths in repo_config.py ([feast-dev#5207](feast-dev#5207)) ([ab35b0b](feast-dev@ab35b0b)), closes [feast-dev#5206](feast-dev#5206) * Update the doc ([feast-dev#5194](feast-dev#5194)) ([726464e](feast-dev@726464e)) * Updated the operator-rabc example to test RBAC from a Kubernete pod ([feast-dev#5147](feast-dev#5147)) ([d23a1a5](feast-dev@d23a1a5)) ### Features * add `real`(float32) type for trino offline store ([feast-dev#4749](feast-dev#4749)) ([0947f96](feast-dev@0947f96)) * Add async DynamoDB timeout and retry configuration ([feast-dev#5178](feast-dev#5178)) ([2f3bcf5](feast-dev@2f3bcf5)) * Add CronJob capability to the Operator (feast apply & materialize-incremental) ([feast-dev#5217](feast-dev#5217)) ([285c0dc](feast-dev@285c0dc)) * Add RAG tutorial and Use Cases documentation ([feast-dev#5226](feast-dev#5226)) ([99f4004](feast-dev@99f4004)) * Added CLI for features, get historical and online features ([feast-dev#5197](feast-dev#5197)) ([4ab9f74](feast-dev@4ab9f74)) * Added export support in feast UI ([feast-dev#5198](feast-dev#5198)) ([b079553](feast-dev@b079553)) * Added global registry search support in Feast UI ([feast-dev#5195](feast-dev#5195)) ([f09ea49](feast-dev@f09ea49)) * Added UI for Features list ([feast-dev#5192](feast-dev#5192)) ([cc7fd47](feast-dev@cc7fd47)) * Adding blog on RAG with Milvus ([feast-dev#5161](feast-dev#5161)) ([b9e2e6c](feast-dev@b9e2e6c)) * Adding Docling RAG demo ([feast-dev#5109](feast-dev#5109)) ([569404b](feast-dev@569404b)) * Allow transformations on writes to output list of entities ([feast-dev#5209](feast-dev#5209)) ([955521a](feast-dev@955521a)) * Cache get_any_feature_view results ([feast-dev#5175](feast-dev#5175)) ([924b8a3](feast-dev@924b8a3)) * Clickhouse offline store ([feast-dev#4725](feast-dev#4725)) ([86794c2](feast-dev@86794c2)) * Enable keyword search for Milvus ([feast-dev#5199](feast-dev#5199)) ([ac44967](feast-dev@ac44967)) * Enable transformations on PDFs ([feast-dev#5172](feast-dev#5172)) ([3674971](feast-dev@3674971)) * Enable users to use Entity Query as CTE during historical retrieval ([feast-dev#5202](feast-dev#5202)) ([fe69eaf](feast-dev@fe69eaf)) * helm support more deployment config ([d575372](feast-dev@d575372)) * Improved CLI file structuring ([feast-dev#5201](feast-dev#5201)) ([972ed34](feast-dev@972ed34)) * Kickoff Transformation implementationtransformation code base ([feast-dev#5181](feast-dev#5181)) ([0083303](feast-dev@0083303)) * Make keep-alive timeout configurable for async DynamoDB connections ([feast-dev#5167](feast-dev#5167)) ([7f3e528](feast-dev@7f3e528)) * Operator mounts the odh-trusted-ca-bundle configmap when deployed on RHOAI or ODH ([d4d7b0d](feast-dev@d4d7b0d)) * Spark Transformation ([feast-dev#5185](feast-dev#5185)) ([be3d85c](feast-dev@be3d85c)) Signed-off-by: Jacob Weinhold <[email protected]>

transformation code base

83232e2

Signed-off-by: HaoXuAI <[email protected]>

HaoXuAI requested a review from a team as a code owner March 22, 2025 22:25

HaoXuAI mentioned this pull request Mar 22, 2025

feat: Kickoff Transformation implementation #5130

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HaoXuAI added the ok-to-test label Mar 22, 2025

franciscojavierarceo reviewed Mar 23, 2025

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add back master change to resovle unit test error

eb40fbd

Signed-off-by: HaoXuAI <[email protected]>

HaoXuAI added 4 commits March 22, 2025 22:15

add back master change to resovle unit test error

e4be746

Signed-off-by: HaoXuAI <[email protected]>

fix linthing

93a7a6c

Signed-off-by: HaoXuAI <[email protected]>

fix linthing

be57aea

Signed-off-by: HaoXuAI <[email protected]>

add back master change to resovle unit test error

621b572

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franciscojavierarceo approved these changes Mar 23, 2025

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franciscojavierarceo merged commit 0083303 into master Mar 23, 2025
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franciscojavierarceo deleted the transformation-base branch March 26, 2025 13:29

franciscojavierarceo restored the transformation-base branch March 26, 2025 13:29

franciscojavierarceo mentioned this pull request Jan 14, 2026

Add blog post on new transformation framework #5856

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Copilot AI mentioned this pull request Jan 14, 2026

docs: Add blog post on unified transformation framework #5858

Draft

		from feast.transformation.mode import TransformationMode


		class Transformation(ABC):

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HaoXuAI commented Mar 22, 2025

What this PR does / why we need it:

Which issue(s) this PR fixes:

Misc

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