17 lines
801 B
MySQL
17 lines
801 B
MySQL
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-- Replace existing trigger to honor new value of update_at if it's greater than old updated_at
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-- The equals check handles the case where the application is only modifying certain property of a row (not updateAt) like file restored or deleted flag. In such cases, the old row's and new row's timestamp will be same, so we are incrementing it.
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-- The greater than case handles the case where if application is setting updateAt timestamp lower than currentTimestamp. Ideally, the version should always increase otherwise the diff on client will fail.
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create or replace function trigger_updated_at_microseconds_column() returns trigger
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language plpgsql
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as
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$$
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BEGIN
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IF OLD.updated_at >= NEW.updated_at THEN
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NEW.updated_at = now_utc_micro_seconds();
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END IF;
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RETURN NEW;
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END;
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$$;
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