Iceberg test2

[tarun-google]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @tarun-google, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a significant new Dataflow template, 'Postgres to Iceberg (YAML)', designed for batch data transfer from PostgreSQL databases to Iceberg tables. It enhances the YAML template processing capabilities by allowing dynamic parameter merging from separate option files and intelligent handling of optional Jinja variables. The changes include necessary dependency updates and a robust integration test to ensure the reliability of this new data pipeline.

Highlights

• New Template: Postgres to Iceberg (YAML): Introduced a new YAML-based Dataflow template for batch data migration from PostgreSQL to Iceberg, enabling flexible configuration through YAML.
• Enhanced YAML Template Processing: The main.py script now includes logic to dynamically merge parameters from external YAML option files and to clean up undefined Jinja variables, allowing for more modular and flexible template definitions.
• Dependency Updates: Updated pom.xml files to include necessary dependencies for Iceberg GCP integration and PostgreSQL, along with new Beam integration test modules.
• Comprehensive Integration Testing: Added a new integration test (PostgresToIcebergYamlIT.java) to validate the end-to-end functionality of the Postgres to Iceberg YAML template, ensuring data is correctly transferred and verified.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.39%. Comparing base (5bdcf59) to head (771692f).

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3054      +/-   ##
============================================
- Coverage     50.40%   50.39%   -0.01%     
+ Complexity     5020     5019       -1     
============================================
  Files           969      969              
  Lines         59548    59548              
  Branches       6493     6493              
============================================
- Hits          30017    30012       -5     
- Misses        27407    27412       +5     
  Partials       2124     2124              

Components	Coverage Δ
spanner-templates	70.58% <ø> (-0.01%)	⬇️
spanner-import-export	68.86% <ø> (+0.01%)	⬆️
spanner-live-forward-migration	80.02% <ø> (ø)
spanner-live-reverse-replication	77.44% <ø> (-0.05%)	⬇️
spanner-bulk-migration	88.27% <ø> (ø)
see 4 files with indirect coverage changes

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