Enum PartitionStrategy 

pub enum PartitionStrategy {
    None,
    RangeByTimeDimension {
        field: String,
        granularity: PartitionGranularity,
        retention: Option<RetentionPolicy>,
        look_ahead: Option<u32>,
        window: PartitionWindow,
    },
}

Partitioning strategy for a table.

RangeByTimeDimension is the only supported partitioning strategy; it requires the entity to expose a single FieldRole::TimeDimension field.

Variants

None

No partitioning; the table is stored as a single segment.

RangeByTimeDimension

Range partition on a single FieldRole::TimeDimension field.

Fields

field: String

Name of the time-dimension field used as the partition key.

granularity: PartitionGranularity

Granularity of each partition range (day, week, month, etc.).

retention: Option<RetentionPolicy>

Optional retention policy that removes or archives old partitions.

look_ahead: Option<u32>

How many partitions to pre-create ahead of now() for the extend procedure. Defaults: 7 for Day, 4 for Week, 2 for Month, 1 for Quarter/Year.

window: PartitionWindow

Time-window sizing inputs used to auto-select an appropriate granularity that fits within partition_budget (default 2000) when the dialect imposes a per-table partition cap (e.g. SQL Server’s 5000-partition limit).

These fields are advisory: when present, the materializer’s select_grain helper uses them to coarsen the granularity from the requested grain (e.g. Day → Week → Month → Year) until (history_days + forecast_days) / grain ≤ partition_budget.

Authoring sources (in priority order):

1. Explicit values in the design YAML (highest authority).
2. AI wizard inferring from Strand profiling (min_value/max_value).
3. Defaults baked into the materializer.

Trait Implementations

impl Clone for PartitionStrategy

fn clone(&self) -> PartitionStrategy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PartitionStrategy

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for PartitionStrategy

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for PartitionStrategy

impl PartialEq for PartitionStrategy

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for PartitionStrategy

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 PartitionStrategy