Enum KvTtlPolicy 

pub enum KvTtlPolicy {
    FixedDuration {
        duration_ms: u64,
    },
    FieldBased {
        field: String,
        offset_ms: u64,
    },
}

TTL policy for KV collection key expiration.

Two modes:

• FixedDuration: All keys share the same lifetime from insertion time.
• FieldBased: Each key expires when a referenced timestamp field plus an offset exceeds the current time, allowing per-key variable expiration.

Variants

FixedDuration

Fixed duration from insertion time. All keys share the same lifetime.

Example DDL: WITH storage = 'kv', ttl = INTERVAL '15 minutes'

Fields

duration_ms: u64

Duration in milliseconds.

FieldBased

Field-based expiration. Each key expires when the referenced timestamp field plus the offset exceeds the current time.

Example DDL: WITH storage = 'kv', ttl = last_active + INTERVAL '1 hour'

Fields

field: String

Name of the timestamp field in the value schema.

offset_ms: u64

Offset in milliseconds added to the field value.

Trait Implementations

impl Clone for KvTtlPolicy

fn clone(&self) -> KvTtlPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for KvTtlPolicy

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for KvTtlPolicy

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'__msgpack_de> FromMessagePack<'__msgpack_de> for KvTtlPolicy

fn read<R: Read<'__msgpack_de>>(reader: &mut R) -> Result<Self, Error>

where Self: Sized,

Reads the MessagePack representation of this value from the provided reader.

impl PartialEq for KvTtlPolicy

fn eq(&self, other: &KvTtlPolicy) -> 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 Serialize for KvTtlPolicy

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl ToMessagePack for KvTtlPolicy

fn write<W: Write>(&self, writer: &mut W) -> Result<(), Error>

Writes the MessagePack representation of this value into the provided writer.

impl Eq for KvTtlPolicy

impl StructuralPartialEq for KvTtlPolicy