Bind SQLite timestamp parameters as the exact stored text

[myieye]

linq2db renders DateTime/DateTimeOffset parameters truncated to milliseconds while Microsoft.Data.Sqlite stores 7-digit TEXT and SQLite's strftime rounds — so timestamp comparisons via linq2db could misclassify rows. In lexbox this made WhereAfter via ToLinqToDB() match the target commit itself and delete it during snapshot regeneration (see sillsdev/languageforge-lexbox#2391).

• DateTime/DateTimeOffset parameters now bind as the exact TEXT Microsoft.Data.Sqlite writes (yyyy-MM-dd HH:mm:ss.FFFFFFF, UTC), so both sides of a comparison normalize identically.
• Remaining limitation (inherent, documented in code): linq2db wraps SQLite timestamp comparisons in strftime('...%f') on both sides — millisecond-grained, not configurable — so same-millisecond commits compare equal. Use EF where exact ordering matters (e.g. WhereAfter); OrderBy on a timestamp column is unaffected.
• Tests: linq2db variant of the tick-scale filter test (millisecond and coarser scales), and a WhereAfter self-exclusion regression test seeded with sub-millisecond timestamps ≥ 0.5ms — both fail without the fix.

🤖 Generated with Claude Code

[coderabbitai]

Important

Review skipped

Draft detected.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: dc19c475-e287-4259-86d1-73cd5150f599

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/linq2db-timestamp-params

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}