Function encode_pk

nodedb-columnar/src/pk_index.rs:171–187

Encode a PK value into sortable bytes. Uses big-endian XOR encoding for signed integers (preserves sort order), raw UTF-8 for strings, raw bytes for UUIDs.

(value: &nodedb_types::value::Value)

/// Uses big-endian XOR encoding for signed integers (preserves sort order),
/// raw UTF-8 for strings, raw bytes for UUIDs.
pub fn encode_pk(value: &nodedb_types::value::Value) -> Vec<u8> {
    use nodedb_types::value::Value;
    match value {
        Value::Integer(v) => {
            let sortable = (*v as u64) ^ (1u64 << 63);
            sortable.to_be_bytes().to_vec()
        }
        Value::String(s) => s.as_bytes().to_vec(),
        Value::Uuid(s) => s.as_bytes().to_vec(),
        Value::Decimal(d) => d.serialize().to_vec(),
        Value::DateTime(dt) => {
            let sortable = (dt.micros as u64) ^ (1u64 << 63);
            sortable.to_be_bytes().to_vec()
        }
        _ => format!("{value:?}").into_bytes(),
    }
}

/// Encode a composite PK from multiple values.
pub fn encode_composite_pk(values: &[&nodedb_types::value::Value]) -> Vec<u8> {