QSql - save query / buffer when it fails - issue with placeholders

[JulienMaille]

Dear all,
I'm using QSql module to store measurement data in a distant database.
I would like to handle network disconnection and buffer the queries when they fail.
One of my ideas was to store the query in a text file and process it later when connection is restored.

However I'm using a prepared statement and binding the values, so I need a way to get the whole query (prepared with the placeholders replaced by their bound values).

QSqlQuery::lastQuery() and QSqlQuery::executedQuery() both give me the original prepared statement, with the placeholders. Is a way to get the sql command?

If you have a better suggestion to buffer failed queries, let me know!
Thank you