Function extract_non_null

nodedb-query/src/msgpack_scan/aggregate_helpers.rs:77–80

(doc: &[u8], field: &str, expr: Option<&SqlExpr>)

/// Used by `count(field)` accumulator to count non-null values.
#[inline]
pub fn extract_non_null(doc: &[u8], field: &str, expr: Option<&SqlExpr>) -> Option<()> {
    let v = extract_value(doc, field, expr)?;
    if v.is_null() { None } else { Some(()) }
}