Enum PostgresAdvisoryLockKey 

pub enum PostgresAdvisoryLockKey {
    Single(i64),
    Pair(i32, i32),
}

Key for PostgreSQL advisory locks.

Advisory locks use either a single 64-bit key or a pair of 32-bit keys. These represent different key spaces and do not overlap.

Variants

Single(i64)

Single 64-bit key.

Pair(i32, i32)

Pair of 32-bit keys.

Implementations

impl PostgresAdvisoryLockKey

pub fn from_name( name: &str, allow_hashing: bool, ) -> Result<PostgresAdvisoryLockKey, LockError>

Create a key from a string name.

• ASCII strings up to 9 chars are encoded directly (collision-free)
• 16-char hex strings are parsed as i64
• “XXXXXXXX,XXXXXXXX” format parsed as (i32, i32)
• Other strings are hashed to i64 (if allow_hashing is true)

pub fn has_single_key(&self) -> bool

Returns true if this is a single key.

pub fn key(&self) -> i64

Gets the single key value (panics if Pair).

pub fn keys(&self) -> (i32, i32)

Gets the key pair (splits Single into two i32s).

pub fn to_sql_args(&self) -> String

Convert to SQL function arguments.

Trait Implementations

impl Clone for PostgresAdvisoryLockKey

fn clone(&self) -> PostgresAdvisoryLockKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PostgresAdvisoryLockKey

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

Formats the value using the given formatter.

impl Hash for PostgresAdvisoryLockKey

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

where __H: Hasher,

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 PostgresAdvisoryLockKey

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for PostgresAdvisoryLockKey

impl Eq for PostgresAdvisoryLockKey

impl StructuralPartialEq for PostgresAdvisoryLockKey