Type Alias ExtractEntityFromSK<T, SK>

ExtractEntityFromSK: SK extends {
    $beginsWith: infer V extends PartitionEntityNames<T>;
}
    ? V
    : SK extends PartitionEntityNames<T> ? SK : never

Extracts the entity name from a typed sort key condition for return type narrowing.

Narrows when:

SK is an exact entity name: "Order" → "Order"
SK is { $beginsWith: "Order" } → "Order"

Does not narrow when:

SK is a prefixed string like "Order#123" (can't parse the delimiter at type level)
SK is { $beginsWith: "Order#..." } (specific prefix, not just entity name)

Type Parameters

T extends default
The entity type being queried.
SK
The inferred sort key condition literal type.