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Reviewing Oracle To Postgres Migration
Identifies Oracle-to-PostgreSQL migration risks by cross-referencing code against known behavioral differences (empty strings, refcursors, type coercion, sorting, timestamps, concurrent transactions, etc.). Use when planning a database migration, reviewing migration artifacts, or validating that integration tests cover Oracle/PostgreSQL differences.
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# Oracle-to-PostgreSQL Database Migration Surfaces migration risks and validates migration work against known Oracle/PostgreSQL behavioral differences documented in the `references/` folder. ## When to use 1. **Planning** — Before starting migration work on a procedure, trigger, query, or refcursor client. Identify which reference insights apply so risks are addressed up front. 2. **Validating** — After migration work is done, confirm every applicable insight was addressed and integration tests cover the new PostgreSQL semantics. ## Workflow Determine the task type: **Planning a migration?** Follow the risk assessment workflow. **Validating completed work?** Follow the validation workflow. ### Risk assessment workflow (planning) ``` Risk Assessment: - [ ] Step 1: Identify the migration scope - [ ] Step 2: Screen each insight for applicability - [ ] Step 3: Document risks and recommended actions ``` **Step 1: Identify the migration scope** List the affected database objects (procedures, triggers, queries, views) and the application code that calls them. **Step 2: Screen each insight for applicability** Review the reference index in [references/REFERENCE.md](references/REFERENCE.md). For each entry, determine whether the migration scope contains patterns affected by that insight. Read the full reference file only when the insight is potentially relevant. **Step 3: Document risks and recommended actions** For each applicable insight, note the specific risk and the recommended fix pattern from the reference file. Flag any insight that requires a design decision (e.g., whether to preserve Oracle empty-string-as-NULL semantics or adopt PostgreSQL behavior). ### Validation workflow (post-migration) ``` Validation: - [ ] Step 1: Map the migration artifact - [ ] Step 2: Cross-check applicable insights - [ ] Step 3: Verify integration test coverage - [ ] Step 4: Gate the result ``` **Step 1: Map the migration artifact** Identify the migrated object and summarize the change set.
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