Module source 

Async lookup source trait with predicate and projection pushdown.

Structs

LookupSourceCapabilities

Capabilities that a lookup source advertises.

PushdownAdapter

Wraps a LookupSource that doesn’t support pushdown.

Enums

LookupError

Errors from lookup source operations.

Traits

LookupSource

Async data source for lookup table refresh and query.

LookupSourceDyn

Dyn-compatible version of LookupSource for use as Arc<dyn LookupSourceDyn>.

Functions

projection_names

Resolve projection column indices to their names in schema, in projection order. An empty projection means “all columns” and returns every name in schema order. Shared by the lookup backends to turn the query projection into a column selection.

Type Aliases

ColumnId

Column identifier for projection pushdown.