Remove logic to change partition col of date type to string because we do it in tableutils scandf

[david-zlai]

…e do it in tableutils scandf

Summary

Doing this PR because of #365

Checklist

• Added Unit Tests
• Covered by existing CI
• Integration tested
• Documentation update

Summary by CodeRabbit

• Refactor
  • Simplified the data join processing to eliminate redundant transformations, ensuring a more streamlined handling of left-side data during join operations.
  • Updated underlying logic to adjust how partition details are managed, which may influence the output schema in data processing workflows.

[coderabbitai]

Walkthrough

The pull request refactors the JoinBase class in the Spark module. It renames the local variable from renamedLeftRawDf to renamedLeftDf and removes an intermediate transformation that formatted the partition column. Corresponding comments were updated to reflect the new naming, streamlining the data processing in the join operation.

Changes

File(s)	Change Summary
spark/.../JoinBase.scala	Renamed renamedLeftRawDf to renamedLeftDf; removed the intermediate variable transformation related to the partition column; updated comments.

Possibly related PRs

• Make the partition column convert to a string type if a datetype, and fix gbu for bigquery #365: Addresses partition column handling in the TableUtils class, closely related to the changes in the join operation.
• feat: read and write date types #192: Focuses on DataFrame variable management involving the partitionColumn, similar to the modifications in this PR.

Suggested reviewers

• nikhil-zlai
• piyush-zlai
• varant-zlai

Poem

In the code’s realm, a change takes flight,
A variable renamed to shine bright.
Steps are fewer, the join now sings,
Cleaner flow with simpler things.
Cheers to code that soars like kites! 🚀✨

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📥 Commits

Reviewing files that changed from the base of the PR and between dfc8f31 and 83a55cd.

📒 Files selected for processing (1)

• spark/src/main/scala/ai/chronon/spark/JoinBase.scala (1 hunks)

⏰ Context from checks skipped due to timeout of 90000ms (3)

• GitHub Check: scala_compile_fmt_fix
• GitHub Check: spark_tests
• GitHub Check: enforce_triggered_workflows

🔇 Additional comments (1)

spark/src/main/scala/ai/chronon/spark/JoinBase.scala (1)

285-296: LGTM! Simplified code by removing redundant partition column formatting.

The change aligns with moving the date-to-string conversion to tableutils scandf.

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