fix partition migration: drop conflicting index and recover from part…

[9cb14c1ec0]

…ial runs

The migration failed because idx_logs_team_id_id (created by migration 001) kept its name after the table was renamed to logs_old, blocking the CREATE INDEX on the new partitioned table. Adds a DROP INDEX before re-creating it and recovery logic that detects a partially-applied state (logs_old exists) and rolls back before retrying.

Summary by CodeRabbit

• Refactor
  • Optimized log data management infrastructure to improve system reliability and query performance.

[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

This migration enhances the table partitioning process by adding a recovery mechanism to handle partially applied migrations, a pre-check to skip if partitioning already exists, and removal of a conflicting index before restructuring the logs table for team-based partitioning.

Changes

Cohort / File(s)	Summary
Database Migration Enhancement backend/migrations/002_partition_logs_by_team.sql	Adds recovery logic to detect and rollback incomplete migration runs; introduces a pre-check using pg_partitioned_table to skip if logs table is already partitioned; drops the idx_logs_team_id_id index before renaming the table to prevent conflicts with the new partitioned structure.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• 9cb14c1ec0/SimpleLogs#2: Implements the initial per-team/monthly partitioning logic for the logs table; this PR extends it with recovery paths and safety checks to handle partial failures.

Poem

🐰✨ A migration's tale takes a safer turn,
With recovery paths so the database won't burn,
Pre-checks and indices we gently release,
Partitions take shape—now logs flow with ease! 🗂️

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch user-id

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