Function google_cloud_spanner::mutation::insert_or_update

pub fn insert_or_update(
    table: &str,
    columns: &[&str],
    values: &[&dyn ToKind]
) -> Mutation

insert_or_update returns a Mutation to insert a row into a table. If the row already exists, it updates it instead. Any column values not explicitly written are preserved.

For a similar example, See update.