Enum LockStrength 

pub enum LockStrength {
    Update,
    NoKeyUpdate,
    Share,
    KeyShare,
}

The strength of a LockingClause, strongest first as PostgreSQL orders them.

All four PostgreSQL for_locking_strength levels are modelled so the one shape covers both dialects (MySQL writes only Update and Share; the KEY/NO KEY refinements are PostgreSQL-only).

Variants

Update

FOR UPDATE — the strongest row lock.

NoKeyUpdate

FOR NO KEY UPDATE — a weaker exclusive lock that still admits KEY SHARE (PostgreSQL).

Share

FOR SHARE (also MySQL’s LOCK IN SHARE MODE, distinguished by LockingSpelling).

KeyShare

FOR KEY SHARE — the weakest row lock (PostgreSQL).

Trait Implementations

impl Clone for LockStrength

fn clone(&self) -> LockStrength

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LockStrength

impl Debug for LockStrength

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LockStrength

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for LockStrength

impl Hash for LockStrength

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for LockStrength

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for LockStrength

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for LockStrength