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Document EFCore.PG 11.0 date/time arithmetic and interval fixes - #477
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🟡 Changes recommended
The migration regex can corrupt unrelated text in serialized JSON by mistaking escaped quotes for value boundaries, so collection migrations need JSON-aware traversal instead of document-wide replacement.
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What changed in this PR
Documents EFCore.PG 11.0 date/time and interval fixes, including compatibility considerations for existing JSON data.
Changes:
- Updates .NET and NodaTime translation tables for UTC arithmetic and interval component handling.
- Explains negative interval serialization, the compatibility switch, and upgrade limitations.
- Adds SQL migration examples for existing JSON values.
| File | Description |
|---|---|
| conceptual/Npgsql/types/datetime.md | Explains negative intervals in JSON and the compatibility switch. |
| conceptual/EFCore.PG/release-notes/11.0.md | Documents behavior changes, JSON migration, and deployment warnings. |
| conceptual/EFCore.PG/mapping/translations.md | Updates date/time arithmetic and TimeSpan translations. |
| conceptual/EFCore.PG/mapping/nodatime.md | Updates Duration translations and explains UTC arithmetic. |
Review effort: Balanced
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Documents the EFCore.PG 11.0 fixes to date/time arithmetic with intervals, in the translation tables, the NodaTime page and the 11.0 release notes: arithmetic on timestamptz computed in UTC, truncated TimeSpan/Duration components, and negative TimeSpan/Duration values with days. Also documents the Npgsql.ParseOldEFCoreJsonTimeSpans AppContext switch (in the release notes and the date and time page), and that existing JSON data with negative values with days must be migrated manually, with SQL to do so, and isn't read correctly by previous versions. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Documents the EFCore.PG 11.0 fixes to date/time arithmetic with intervals, in the translation tables, the NodaTime page and the 11.0 release notes: arithmetic on timestamptz computed in UTC, truncated TimeSpan/Duration components, and negative TimeSpan/Duration values with days.
Also documents the Npgsql.ParseOldEFCoreJsonTimeSpans AppContext switch (in the release notes and the date and time page), and that existing JSON data with negative values with days must be migrated manually, with SQL to do so, and isn't read correctly by previous versions.
Companion to npgsql/efcore.pg#4116.