Iceberg test3

[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 new Dataflow Flex Template for batch data migration, enabling seamless transfer from PostgreSQL databases to Apache Iceberg tables. The template utilizes a YAML-driven approach for pipeline definition and parameterization, making it highly configurable and reusable. Key changes include the implementation of modular option files for JDBC and Iceberg configurations, alongside significant enhancements to the YAML processing logic to support advanced Jinja templating and dynamic handling of optional parameters. This ensures a robust and flexible solution for data integration between these systems.

Highlights

• New Flex Template: Introduced a new Dataflow Flex Template, Postgres_To_Iceberg_Yaml, designed for batch data transfer from PostgreSQL to Apache Iceberg.
• YAML-based Configuration: The template leverages a YAML definition (PostgresToIceberg.yaml) for pipeline structure and parameterization, enhancing flexibility.
• Modular Options: New postgres_options.yaml and iceberg_options.yaml files were added to define reusable parameter sets for JDBC and Iceberg configurations, respectively.
• Jinja Templating Enhancements: The main.py script was updated to support advanced Jinja templating within YAML, including handling of optional parameters and merging of modular options.
• Comprehensive Testing: A new integration test (PostgresToIcebergYamlIT.java) and unit tests (test_main.py) were added to validate the end-to-end functionality and new YAML processing utilities.

Ignored Files

• Ignored by pattern: .github/workflows/** (1)
  • .github/workflows/java-pr.yml

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.41%. Comparing base (5bdcf59) to head (5eb51e7).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3057      +/-   ##
============================================
- Coverage     50.42%   50.41%   -0.02%     
+ Complexity     5022     5016       -6     
============================================
  Files           969      969              
  Lines         59548    59548              
  Branches       6493     6493              
============================================
- Hits          30030    30021       -9     
- Misses        27397    27402       +5     
- Partials       2121     2125       +4     

Components	Coverage Δ
spanner-templates	70.62% <ø> (-0.03%)	⬇️
spanner-import-export	68.93% <ø> (-0.06%)	⬇️
spanner-live-forward-migration	80.02% <ø> (-0.02%)	⬇️
spanner-live-reverse-replication	77.49% <ø> (-0.02%)	⬇️
spanner-bulk-migration	88.27% <ø> (-0.02%)	⬇️
see 4 files with indirect coverage changes

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