import { TupleKey } from "../lib/tupleKey.js";
export interface PointSet {
    /**
     * Advance the stream to the next item and return it. Return null if the stream is exhausted.
     */
    advance(): Promise<TupleKey | null>;
    /**
     * Return the current item in the stream.
     */
    current(): Promise<TupleKey | null>;
    /**
     * Seek to the given tuple.
     */
    seek(tuple: TupleKey): Promise<void>;
    /**
     * Estimate on the number of elements in the stream.
     */
    sizeHint(): Promise<number>;
    /**
     * Set number of rows to prefetch after the current position.
     */
    setPrefetch(prefetch: number): void;
}
export type Stats = {
    cells: number;
    queriesIssued: number;
    rowsRead: number;
    rowsPostFiltered: number;
};
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