Enum VersionPayload 

pub enum VersionPayload {
    Present(Vec<(String, Value)>),
    Tombstone,
}

What a RowVersion records. Present carries the row’s column values at the moment of commit; Tombstone records that the row was deleted at this version’s begin timestamp.

Storing column-value pairs as a Vec<(String, Value)> rather than BTreeMap<String, Value> because:

• The vector preserves declaration order (stable for tests + diagnostics).
• Lookups by column are rare on this path — the executor walks the row by projection order.

Variants

Present(Vec<(String, Value)>)

Row exists with the given column-value pairs.

Tombstone

Row was deleted at this version’s begin timestamp. Visible readers see “no such row”; readers older than begin still see whatever the previous version held.

Trait Implementations

impl Clone for VersionPayload

fn clone(&self) -> VersionPayload

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for VersionPayload

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for VersionPayload

fn eq(&self, other: &VersionPayload) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for VersionPayload