/**
 * PgQuintStore - PostgreSQL implementation of QuintStore
 *
 * Features:
 * - Full ACID transactions
 * - Efficient graph prefix queries using btree index
 * - Connection pooling via pg Pool
 * - Vector embeddings stored as JSON
 */
import { AsyncIterator } from 'asynciterator';
import type { Term } from '@rdfjs/types';
import type { Quint, QuintPattern, QuintStoreOptions, QueryOptions, StoreStats } from './types';
export interface PgQuintStoreOptions extends QuintStoreOptions {
    /** PostgreSQL connection string */
    connectionString?: string;
    /** Maximum number of connections in pool */
    poolMax?: number;
    /** Idle timeout in milliseconds */
    poolIdleTimeoutMillis?: number;
    /** Connection timeout in milliseconds */
    poolConnectionTimeoutMillis?: number;
}
export declare class PgQuintStore {
    private pool;
    private options;
    constructor(options: PgQuintStoreOptions);
    open(): Promise<void>;
    close(): Promise<void>;
    get(pattern: QuintPattern, options?: QueryOptions): Promise<Quint[]>;
    match(subject?: Term | null, predicate?: Term | null, object?: Term | null, graph?: Term | null): AsyncIterator<Quint>;
    getByGraphPrefix(prefix: string, options?: QueryOptions): Promise<Quint[]>;
    count(pattern: QuintPattern): Promise<number>;
    put(quint: Quint): Promise<void>;
    multiPut(quints: Quint[]): Promise<void>;
    updateEmbedding(pattern: QuintPattern, embedding: number[]): Promise<number>;
    del(pattern: QuintPattern): Promise<number>;
    multiDel(quints: Quint[]): Promise<void>;
    stats(): Promise<StoreStats>;
    clear(): Promise<void>;
    optimize(): Promise<void>;
    private ensureOpen;
    private buildWhereClause;
    private quintToRow;
    private rowToQuint;
}