import type { AuthorityQueryPage, AuthorityQueryRequest } from './http-db.js';
type Row = Record<string, unknown>;
export interface EmbeddedQueryStats {
    scanned: number;
    decoded: number;
    matched: number;
    sorted: number;
    materialized: number;
    returned: number;
    usedIndex: boolean;
    indexName?: string;
    indexLookupMs: number;
    executionMs: number;
}
export interface EmbeddedQueryExplanation {
    plan: 'index-range' | 'index-filter' | 'full-scan';
    index?: string;
    reason?: string;
    order: string;
    limit: number;
    cursor: boolean;
}
/** Small deterministic planner/executor owned by an embedded storage boundary. */
export declare class EmbeddedQueryEngine {
    private readonly allRows;
    private indexes;
    constructor(allRows: () => Iterable<[string, unknown]>);
    rebuild(): void;
    apply(key: string, value: unknown | undefined): void;
    private installDefinition;
    private plan;
    explain(query: AuthorityQueryRequest): EmbeddedQueryExplanation;
    execute<T = Row>(query: AuthorityQueryRequest): AuthorityQueryPage<T> & {
        stats: EmbeddedQueryStats;
    };
    private afterCursor;
    private compareEntryCursor;
    private indexRange;
    private orderDescription;
    private validate;
}
export {};
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