[Feature Request]: Support relational Joins in Python SDK
Open
core
new feature
P2
python
- Dominant language
- Java
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Description
### What would you like to happen?
The only current way to directly implement relational joins between two PCollections using the library is through Java SDK's org.apache.beam.sdk.schemas.transforms.Join. As a Python pipeline developer I would like to be able to do the same, in a similar fashion as described in the usage examples of https://beam.apache.org/documentation/sdks/java-extensions/#join-library
.add-labels python,'new feature'
### Issue Priority
Priority: 2
### Issue Component
Component: sdk-py-core
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