Enum JournalPolicy 

pub enum JournalPolicy {
    EstablishWal,
    PreserveExisting,
    RequireExistingWal,
}

What an open under a profile does to the file’s journal mode.

Naming this makes the durable-writer rule checkable instead of accidental: a profile added later has to choose a policy, and cannot inherit “not Primary, therefore no WAL” from the shape of a match arm.

Variants

EstablishWal

Convert-or-confirm journal_mode=WAL at open, verified against the mode SQLite reports back, and fail the open when WAL cannot be established. Ordinary primary traffic establishes WAL; online administration instead requires WAL to have been established already.

PreserveExisting

Leave the file’s journal mode exactly as found.

RequireExistingWal

Require established WAL without attempting a conversion.

Trait Implementations

impl Clone for JournalPolicy

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for JournalPolicy

impl Debug for JournalPolicy

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

Formats the value using the given formatter.

impl Eq for JournalPolicy

impl PartialEq for JournalPolicy

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for JournalPolicy