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import { DataSource } from "../data-source/DataSource";
import { Migration } from "./Migration";
import { QueryRunner } from "../query-runner/QueryRunner";
/**
* Executes migrations: runs pending and reverts previously executed migrations.
*/
export declare class MigrationExecutor {
protected connection: DataSource;
protected queryRunner?: QueryRunner | undefined;
/**
* Indicates how migrations should be run in transactions.
* all: all migrations are run in a single transaction
* none: all migrations are run without a transaction
* each: each migration is run in a separate transaction
*/
transaction: "all" | "none" | "each";
/**
* Option to fake-run or fake-revert a migration, adding to the
* executed migrations table, but not actually running it. This feature is
* useful for when migrations are added after the fact or for
* interoperability between applications which are desired to each keep
* a consistent migration history.
*/
fake: boolean;
private readonly migrationsDatabase?;
private readonly migrationsSchema?;
private readonly migrationsTable;
private readonly migrationsTableName;
constructor(connection: DataSource, queryRunner?: QueryRunner | undefined);
/**
* Tries to execute a single migration given.
*/
executeMigration(migration: Migration): Promise<Migration>;
/**
* Returns an array of all migrations.
*/
getAllMigrations(): Promise<Migration[]>;
/**
* Returns an array of all executed migrations.
*/
getExecutedMigrations(): Promise<Migration[]>;
/**
* Returns an array of all pending migrations.
*/
getPendingMigrations(): Promise<Migration[]>;
/**
* Inserts an executed migration.
*/
insertMigration(migration: Migration): Promise<void>;
/**
* Deletes an executed migration.
*/
deleteMigration(migration: Migration): Promise<void>;
/**
* Lists all migrations and whether they have been executed or not
* returns true if there are unapplied migrations
*/
showMigrations(): Promise<boolean>;
/**
* Executes all pending migrations. Pending migrations are migrations that are not yet executed,
* thus not saved in the database.
*/
executePendingMigrations(): Promise<Migration[]>;
/**
* Reverts last migration that were run.
*/
undoLastMigration(): Promise<void>;
/**
* Creates table "migrations" that will store information about executed migrations.
*/
protected createMigrationsTableIfNotExist(queryRunner: QueryRunner): Promise<void>;
/**
* Loads all migrations that were executed and saved into the database (sorts by id).
*/
protected loadExecutedMigrations(queryRunner: QueryRunner): Promise<Migration[]>;
/**
* Gets all migrations that setup for this connection.
*/
protected getMigrations(): Migration[];
protected checkForDuplicateMigrations(migrations: Migration[]): void;
/**
* Finds the latest migration (sorts by timestamp) in the given array of migrations.
*/
protected getLatestTimestampMigration(migrations: Migration[]): Migration | undefined;
/**
* Finds the latest migration in the given array of migrations.
* PRE: Migration array must be sorted by descending id.
*/
protected getLatestExecutedMigration(sortedMigrations: Migration[]): Migration | undefined;
/**
* Inserts new executed migration's data into migrations table.
*/
protected insertExecutedMigration(queryRunner: QueryRunner, migration: Migration): Promise<void>;
/**
* Delete previously executed migration's data from the migrations table.
*/
protected deleteExecutedMigration(queryRunner: QueryRunner, migration: Migration): Promise<void>;
protected withQueryRunner<T extends any>(callback: (queryRunner: QueryRunner) => T | Promise<T>): Promise<T>;
}