PreferredTimestampColumn nominated the first column mapping to DriverDataType
.DateTime, and that set includes date-only types (SQL Server / PostgreSQL
'date'). A table whose first date/time column is a 'date' committed
rowSelector.topByTimestamp = <date>, making the wide-row read ORDER BY <date>
DESC LIMIT 1 - which ties for every row written that day, so 'the newest row'
became storage order among the ties.
Time-bearing candidates now outrank date-only ones; a date-only column is still
stated when it is all the table has, so such a table stays bindable. Oracle's
DATE carries a time of day and is exempt - pinned by a control dialect that
differs from the SQLite one only in the Provider it reports.
Joseph Doherty