import { DataSource } from 'typeorm';
export type QuerySetKey = 'upQueries' | 'downQueries';
export type QuerySets = Record<QuerySetKey, QuerySet>;
export type QuerySet = Query[];
export type Query = {
    query: string;
    parameters: any[] | null | undefined;
};
export type QueryExecution = {
    name: string;
    querySet: QuerySet;
};
export type MigrationsOptions = {
    migrationsTableName?: string;
    migrationsDir?: string;
    /** @default `true` when `process.env.NODE_ENV === 'development'` otherwise `false` */
    generateMigrations?: boolean;
};
export type RunMigrationsOptions = {
    /**
     * Only run migrations less than or equal to this date; and, if any migrations are generated, generate them with this date.
     * @default now
     */
    timestamp?: Date;
};
export type RunLockOptions = {
    lock: {
        acquire: () => Promise<{
            release: () => Promise<void>;
        }>;
    };
};
export declare function runMigrations(dataSource: DataSource, options: MigrationsOptions & RunMigrationsOptions & RunLockOptions): Promise<{
    pendingQueryExecuted: QueryExecution[];
    newQueryExcuted: QueryExecution[];
}>;
/**
 * `0000000000000` is a special migration, useful if you are switching from TypeORM's `synchronize` method to migrations.
 * `0000000000000` will be skipped if any table in the entity schema already exists.
 * If you are switching from `synchronize` to migrations you should use a new database and generate a migration against that, then rename the migration to `0000000000000-generated.yml`.
 */
export declare class Migrations {
    private dataSource;
    static defaultOptions: Required<MigrationsOptions>;
    options: Required<MigrationsOptions>;
    constructor(dataSource: DataSource, options: MigrationsOptions);
    runMigrations(options: RunMigrationsOptions): Promise<{
        pendingQueryExecuted: QueryExecution[];
        newQueryExcuted: QueryExecution[];
    }>;
    private generateMigrationFileContents;
    private executeMigrationFileContents;
    private getAlreadyRunMigrations;
    private insertRunMigration;
    private createMigrationsTableIfNotExists;
    private hasSomeEntityTables;
}