Enum WriteContact 

pub enum WriteContact {
    ReadWrite,
    ReadOnlyWalSidecars,
}

The strongest filesystem no-write guarantee an open under a profile can make. Diagnostic surfaces (doctor) report from this instead of promising a zero-touch open that SQLite cannot deliver.

Variants

ReadWrite

The profile writes: mutating pragmas at open (journal-mode conversion) and/or subsequent DDL/DML.

ReadOnlyWalSidecars

Logical database content is never modified, but SQLite may still create or update the -wal/-shm sidecar files when the database is in WAL mode: coherent WAL reads require the shared-memory index, and rusqlite offers no way around that short of immutable=1, which is only sound when no live writer can exist and is therefore not used here. On truly read-only media a WAL database whose sidecars are absent fails to read (typed SQLite error) instead of being mutated; rollback-journal databases are read with no sidecar contact at all.

Trait Implementations

impl Clone for WriteContact

fn clone(&self) -> WriteContact

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for WriteContact

impl Debug for WriteContact

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

Formats the value using the given formatter.

impl Eq for WriteContact

impl PartialEq for WriteContact

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for WriteContact