import Pool from 'pg-pool';
import { QueryArrayResult, type Client, type PoolClient } from 'pg';
import { Logger, type Options } from '@lordfokas/loggamus';
/** Define a new logger to send output to */
export declare function useLogger(logger: Logger, options?: Options): void;
type PGClient = Client & PoolClient;
/** The database connection manager */
export declare class DB {
    #private;
    static isReadOnly(): boolean;
    static setReadOnly(value: boolean): void;
    /** Initiate the connection pool to the database server. Necessary before acquiring any connections. */
    static init(config: Pool.Config<Client>): void;
    /** Acquire a connection to execute queries on. */
    static acquire(): Promise<Connection>;
}
/** A database connection to execute queries on. */
export declare class Connection {
    #private;
    constructor(conn: PGClient);
    /**
     * Execute a PreparedStatement query
     * @param sql string or string[] with the query to execute
     * @param values parameters to replace in the prepared statement
     * @returns query results
     */
    execute(sql: string | string[], values?: any[]): Promise<QueryArrayResult>;
    /**
     * Executes raw unprepared queries. Should be used solely to run commands unsupported by prepared statements, such as LOCKs
     * @param sql the raw SQL query to execute
     * @returns query results
     * @deprecated
     */
    DANGEROUSLY(sql: string): Promise<QueryArrayResult>;
    /**
     * Runs an async function inside a new transaction.
     * Automatically commits at the end, and rollbacks on error.
     */
    atomic<T>(fn: () => Promise<T>, operation: string): Promise<T>;
    /**
     * Sets the current path to a given list of schemas.
     * @param schemas varargs list of schemas to use.
     */
    schema(...schemas: string[]): Promise<void>;
    /** Release this connection back into the Pool. */
    release(): void;
}
export {};