I think that deep down somewhere in the MySQL docs there is a mention that updating an existing record with the same data it already contains, get optimized away (and hence does not trigger an update of the TIMESTAMP field).

CountZero

"If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law

In reply to Re^2: Odd "rows affected" values using DBI on MySQL by CountZero
in thread Odd "rows affected" values using DBI on MySQL by LassiLantar

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