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Moving updated-at timestamps to unique millisecond times (#17489)

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To allow the ability to have guaranteed-unique cursors, we make two
important updates:
* Add new updated_at_ms and created_at_ms columns that are in
millisecond precision
* Guarantee uniqueness -- if multiple items are inserted at the same
millisecond, bump the new one by one millisecond until it becomes unique

This lets us use single-number cursors for forwards and backwards paging
through resultsets and guarantee that the cursor is a fixed point to do
(timestamp > cursor) and get new items only.

This updated implementation is backwards-compatible since multiple
appservers can be running and won't handle the previous method well.
This commit is contained in:
David de Regt
2026-04-14 11:55:34 -04:00
committed by GitHub
parent 61fe23159e
commit 4f2fc3e3fa
13 changed files with 470 additions and 167 deletions
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codex-rs/state/src/model/mod.rs
+2
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@@ -39,4 +39,6 @@ pub(crate) use memories::Stage1OutputRow;
pub(crate) use memories::stage1_output_ref_from_parts;
pub(crate) use thread_metadata::ThreadRow;
pub(crate) use thread_metadata::anchor_from_item;
pub(crate) use thread_metadata::datetime_to_epoch_millis;
pub(crate) use thread_metadata::datetime_to_epoch_seconds;
pub(crate) use thread_metadata::epoch_millis_to_datetime;