Struct Lock 

pub struct Lock {
    pub strength: Option<LockStrength>,
    pub tables: Vec<Cow<'static, str>>,
    pub wait: Option<LockWait>,
}

FOR <strength> [OF table, …] [NOWAIT | SKIP LOCKED]

From PostgreSQL 17:

FOR { UPDATE | NO KEY UPDATE | SHARE | KEY SHARE }
    [ OF table_name [, ...] ] [ NOWAIT | SKIP LOCKED ]

Never contributes a bound argument: the OF list is table names.

Fields

strength: Option<LockStrength>

How strong a lock. None is how a default-constructed lock stays absent — there is no FOR clause without a strength.

tables: Vec<Cow<'static, str>>

Restrict the lock to these tables of the statement. Quoted.

wait: Option<LockWait>

What to do when a row is already locked. The default is to wait.

Implementations

impl Lock

pub fn new(strength: LockStrength) -> Self

A lock of strength over every table in the statement.

pub fn append_table( &mut self, tables: impl IntoIterator<Item = impl Into<Cow<'static, str>>>, )

Restrict the lock to these tables.

pub fn is_empty(&self) -> bool

Whether the clause is absent.

Trait Implementations

impl Clone for Lock

fn clone(&self) -> Lock

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Lock

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

Formats the value using the given formatter.

impl Default for Lock

fn default() -> Lock

Returns the “default value” for a type.

impl Expression for Lock

fn write_sql(&self, w: &mut SqlWriter<'_>)

Append this fragment to w.