Function extract_str_val

nodedb-query/src/msgpack_scan/aggregate.rs:260–268

Extract a string from a field or expression result.

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

/// Extract a string from a field or expression result.
fn extract_str_val(doc: &[u8], field: &str, expr: Option<&crate::expr::SqlExpr>) -> Option<String> {
    if let Some(expr) = expr {
        return Some(value_ops::value_to_display_string(&eval_expr_on_doc(
            doc, expr,
        )?));
    }
    let (start, _end) = extract_field(doc, 0, field)?;
    read_str(doc, start).map(|s| s.to_string())
}

/// Extract a field as `Value`. Uses direct msgpack→Value for scalars;
/// falls back to full decode only for complex types.