import type { RdfSearchCardinalityEstimate, RdfVectorChunkInput, RdfVectorDistanceMetric, RdfVectorIndexLike, RdfVectorIndexStats, RdfVectorModelDistribution, RdfVectorSearchOptions, RdfVectorSearchResult, RdfVectorSourceInput, RdfVectorSummaryLifecycleEntry, RdfVectorSummaryLifecycleOptions } from './types';
export interface PostgresRdfVectorIndexOptions {
    driver?: 'pglite' | 'pg';
    backend?: 'pgvector' | 'component';
    dataDir?: string;
    connectionString?: string;
    host?: string;
    port?: number;
    database?: string;
    user?: string;
    password?: string;
    pool?: any;
    autoOpen?: boolean;
    defaultMetric?: RdfVectorDistanceMetric;
}
export declare class PostgresRdfVectorIndex implements RdfVectorIndexLike {
    private readonly options;
    private executor;
    private pglite;
    private pgPool;
    private sharedPoolConfig;
    private initializing;
    private readonly ensuredPgVectorIndexes;
    constructor(options?: PostgresRdfVectorIndexOptions);
    open(): Promise<void>;
    close(): Promise<void>;
    clear(): Promise<void>;
    schemaVersion(): Promise<number>;
    private readSchemaVersion;
    indexVector(source: RdfVectorSourceInput, chunks: RdfVectorChunkInput[]): Promise<void>;
    deleteSource(source: string): Promise<number>;
    moveSource(oldSource: string, next: RdfVectorSourceInput): Promise<number>;
    search(options: RdfVectorSearchOptions): Promise<RdfVectorSearchResult[]>;
    summaryLifecycle(options?: RdfVectorSummaryLifecycleOptions): Promise<RdfVectorSummaryLifecycleEntry[]>;
    estimateSearchCardinality(options: RdfVectorSearchOptions): Promise<RdfSearchCardinalityEstimate>;
    stats(): Promise<RdfVectorIndexStats>;
    modelDistribution(): Promise<RdfVectorModelDistribution[]>;
    private openInternal;
    private initializeSchema;
    private validateSchema;
    private ensurePgVectorSearchIndex;
    private upsertSource;
    private estimateDatabaseBytes;
    private requireExecutor;
    private usesPgVectorBackend;
}