Weichen Xu created SPARK-39058:
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Summary: Add `getInputSignature` and `getOutputSignature` APIs for
spark ML models/transformers
Key: SPARK-39058
URL: https://issues.apache.org/jira/browse/SPARK-39058
Project: Spark
Issue Type: New Feature
Components: ML
Affects Versions: 3.4.0
Reporter: Weichen Xu
Add `getInputSignature` and `getOutputSignature` APIs for spark ML
models/transformers:
The `getInputSignature` API return a list of column name and type which
represent the ML model / transformer's input columns.
The `getOutputSignature` API return a list of column column name and type which
represent the ML model / transformer's output columns.
These 2 APIs are useful to in third-party library such as mlflow, which
requires the information of input / output signature of the Model.
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