import {
  type AnyEntity,
  type Configuration,
  type EntityData,
  type RawQueryFragment,
  type Transaction,
} from '@mikro-orm/core';
import type { AbstractSqlDriver, EntityManager, NativeQueryBuilder } from '@mikro-orm/sql';
/** A migration query: raw SQL string, a native query builder instance, or a `raw()` SQL fragment. */
export type Query = string | NativeQueryBuilder | RawQueryFragment;
/** Base class for SQL database migrations. Extend this class and implement `up()` (and optionally `down()`). */
export declare abstract class Migration {
  #private;
  protected readonly driver: AbstractSqlDriver;
  protected readonly config: Configuration;
  protected ctx?: Transaction;
  constructor(driver: AbstractSqlDriver, config: Configuration);
  abstract up(): Promise<void> | void;
  down(): Promise<void> | void;
  isTransactional(): boolean;
  addSql(sql: Query): void;
  reset(): void;
  setTransactionContext(ctx: Transaction): void;
  /**
   * Executes a raw SQL query. Accepts a string SQL, `raw()` SQL fragment, or a native query builder instance.
   * The `params` parameter is respected only if you use string SQL in the first parameter.
   */
  execute(sql: Query, params?: unknown[]): Promise<EntityData<AnyEntity>[]>;
  /**
   * Creates a cached `EntityManager` instance for this migration, which will respect
   * the current transaction context.
   */
  getEntityManager(): EntityManager;
  getQueries(): Query[];
}