Function dataflow::render::upsert::evaluate

fn evaluate(
    datums: &[Datum<'_>], 
    predicates: &[MirScalarExpr], 
    position_or: &[Option<usize>], 
    row_packer: &mut Row
) -> Result<Option<Row>, EvalError>

Evaluates predicates and dummy column information.

This method takes decoded datums and prepares as output a row which contains only those positions of position_or. If any predicate is failed, no row is produced, and if an error is encounted it is returned instead.