fix: strip timezone from datetime for MySQL to prevent stale-writer false positive#5209
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enjoykumawat wants to merge 1 commit intogoogle:mainfrom
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fix: strip timezone from datetime for MySQL to prevent stale-writer false positive#5209enjoykumawat wants to merge 1 commit intogoogle:mainfrom
enjoykumawat wants to merge 1 commit intogoogle:mainfrom
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…alse positive MySQL DATETIME(fsp=6) silently drops timezone info on storage, so a tz-aware datetime written by create_session produces a different _storage_update_marker string than the naive datetime read back by append_event, causing a false ValueError on the first append after create. The code already handled this for SQLite and PostgreSQL but not MySQL. Add MySQL to the timezone stripping check. Fixes google#5085
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Summary
create_session()alongside SQLite and PostgreSQLDATETIME(fsp=6)silently drops timezone info, causing_storage_update_markermismatch on firstappend_event()Root Cause
create_session()creates a tz-aware datetime (tz=timezone.utc) and derives the_storage_update_markerfrom it (includes+00:00). MySQLDATETIMEdrops timezone on storage. Whenappend_event()readsupdate_timeback, it gets a naive datetime, produces a different marker string, and the strict comparison fails withValueError: The session has been modified in storage since it was loaded.The code already handled this for SQLite and PostgreSQL (line 464) but MySQL was missing.
Test Plan
Fixes #5085