import type { DuckDBConnection, DuckDBPreparedStatement, DuckDBType, DuckDBValue } from '@duckdb/node-api';
export declare class PreparedStatementCache {
    private connection;
    private size;
    private entries;
    private executionTail;
    private hits;
    private misses;
    private evictions;
    stats(): {
        size: number;
        capacity: number;
        hits: number;
        misses: number;
        evictions: number;
    };
    constructor(connection: DuckDBConnection, size: number);
    resize(size: number): void;
    getOrPrepare(query: string): Promise<DuckDBPreparedStatement>;
    runExclusive<T>(operation: () => Promise<T>): Promise<T>;
    remember(query: string, statement: DuckDBPreparedStatement): DuckDBPreparedStatement;
    evict(query: string): void;
    clear(): void;
    private evictOldest;
    private trimToSize;
}
export declare function getPreparedStatementCache(connection: DuckDBConnection, size: number): PreparedStatementCache;
export declare function clearPreparedStatementCache(connection: DuckDBConnection): void;
/** Read cache counters without creating or resizing the native cache. */
export declare function getPreparedStatementCacheStats(connection: DuckDBConnection): {
    size: number;
    capacity: number;
    hits: number;
    misses: number;
    evictions: number;
} | undefined;
export declare function bindPreparedStatement(statement: DuckDBPreparedStatement, values: DuckDBValue[] | undefined, types?: DuckDBType[]): void;