laminar_sql::datafusion::lookup_join_exec

Struct PartialLookupState

pub struct PartialLookupState {
    pub foyer_cache: Arc<FoyerMemoryCache>,
    pub schema: SchemaRef,
    pub key_columns: Vec<String>,
    pub key_sort_fields: Vec<SortField>,
    pub source: Option<Arc<dyn LookupSourceDyn>>,
    pub fetch_semaphore: Arc<Semaphore>,
}

Expand description

State for a partial (on-demand) lookup table.

Fields§

§foyer_cache: Arc<FoyerMemoryCache>

Bounded foyer memory cache with S3-FIFO eviction.

§schema: SchemaRef

Schema of the lookup table.

§key_columns: Vec<String>

Key column names for row encoding.

§key_sort_fields: Vec<SortField>

SortField descriptors for key encoding via RowConverter.

§source: Option<Arc<dyn LookupSourceDyn>>

Async source for cache miss fallback (None = cache-only mode).

§fetch_semaphore: Arc<Semaphore>

Limits concurrent source queries to avoid overloading the source.

Auto Trait Implementations§

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impl !UnwindSafe for PartialLookupState

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