import { IParsedSample, MigrationEnv, MigrationStatus } from '../../types';
import InputsService from '../../inputs/inputs.service';
import type { Pool, QueryResult } from 'pg';
export declare function loadPostgresHandler(): Promise<{
    new (connectionString: string): {
        pool: Pool;
        inputService: InputsService;
        connect(): Promise<void>;
        executeQuery(query: string, values?: any[]): Promise<QueryResult>;
        create(schema: IParsedSample[], query: string, params: Record<string, any>): Promise<{
            acknowledged: boolean;
            data: any[];
        }>;
        read(schema: IParsedSample[], query: string, params: Record<string, any>): Promise<any[]>;
        update(schema: IParsedSample[], query: string, params: Record<string, any> | Record<string, any>[]): Promise<boolean>;
        delete(schema: IParsedSample[], query: string, params: Record<string, any>): Promise<boolean>;
        count(schema: IParsedSample[], query: string, params: Record<string, any>): Promise<number>;
        runMigration(queries: string[], type: "up" | "down", env: MigrationEnv | null): Promise<{
            type: "up" | "down";
            result: {
                index: number;
                status?: MigrationStatus;
                processed_at: number;
                reason?: any;
            }[];
            status: MigrationStatus.PROCESSED | MigrationStatus.FAILED;
            processed_at: number;
        }>;
        closeConnection(): Promise<void>;
    };
}>;