Struct PersistableEntry 

pub struct PersistableEntry {
    pub key: u64,
    pub table_id: u64,
    pub schema_id: u64,
    pub run_generation: u64,
    pub entry_generation: u64,
    pub bytes: usize,
    pub payload_factory: Box<dyn FnOnce() -> Option<Vec<u8>> + Send + 'static>,
}

Cheap-to-share body for a queued store. The query thread constructs this with raw data (Arc-shared rows, columns, footprint) plus a lazy PersistableEntry::payload_factory. The factory captures the raw data and produces the bincode-serialized bytes only when the worker invokes it — keeping the query thread free of both serialization and I/O.

Fields

key: u64

table_id: u64

schema_id: u64

run_generation: u64

entry_generation: u64

bytes: usize

Approximate in-memory bytes; used for queue accounting.

payload_factory: Box<dyn FnOnce() -> Option<Vec<u8>> + Send + 'static>

Lazy bincode payload producer. Invoked exactly once by the worker thread; the query thread never executes it. Returns None if bincode encoding fails.

Trait Implementations

impl Debug for PersistableEntry

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

Formats the value using the given formatter.