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Enhance Oracle-to-PostgreSQL migration skills and documentation (#2284)

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- Update migration agent guidelines to prioritize extension tool usage for code migration.
- Refine migration phases with detailed steps for pre-migration review and schema migration.
- Add new reviewing skill references for PostgreSQL materialized view refresh and UNION ALL planner risks.
- Ensure consistency in collation handling and testing strategies across skills.

Co-authored-by: TCPrimedPaul <paul.delannoy@tc.gc.ca>
This commit is contained in:
Paul Delannoy
2026-07-13 21:06:58 -04:00
committed by GitHub
parent 0aaced5332
commit 0b950f9824
11 changed files with 150 additions and 21 deletions
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skills/reviewing-oracle-to-postgres-migration/references/REFERENCE.md
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| [oracle-to-postgres-sorting.md](oracle-to-postgres-sorting.md) | How to preserve Oracle-like ordering in PostgreSQL using COLLATE "C" and DISTINCT wrapper patterns. |
| [oracle-to-postgres-to-char-numeric.md](oracle-to-postgres-to-char-numeric.md) | Oracle allows TO_CHAR(numeric) without format; PostgreSQL requires format string—use CAST(numeric AS TEXT) instead. |
| [oracle-to-postgres-type-coercion.md](oracle-to-postgres-type-coercion.md) | PostgreSQL strict type checks vs. Oracle implicit coercion—fix comparison errors by quoting or casting literals. |
| [postgres-union-all-planner.md](postgres-union-all-planner.md) | UNION ALL branches can produce poor plans when predicate pushdown is limited—review plans and split or reshape queries when needed. |
| [postgres-materialized-view-refresh.md](postgres-materialized-view-refresh.md) | Materialized views are not auto-refreshed after base-table changes—application or jobs must explicitly refresh them. |
| [postgres-concurrent-transactions.md](postgres-concurrent-transactions.md) | PostgreSQL allows only one active command per connection—materialize results or use separate connections to avoid concurrent operation errors. |
| [postgres-refcursor-handling.md](postgres-refcursor-handling.md) | Differences in refcursor handling; PostgreSQL requires fetching by cursor name—C# patterns to unwrap and read results. |
| [oracle-to-postgres-timestamp-timezone.md](oracle-to-postgres-timestamp-timezone.md) | CURRENT_TIMESTAMP / NOW() return UTC-normalised timestamptz in PostgreSQL; Npgsql surfaces DateTime.Kind=Unspecified—force UTC at connection open and in application code. |