import type { Logger } from '@n8n/backend-common';
import type { QueryRunner, ObjectLiteral } from '@n8n/typeorm';
import type { createSchemaBuilder } from './dsl';
export type DatabaseType = 'postgresdb' | 'sqlite';
export interface MigrationContext {
    logger: Logger;
    queryRunner: QueryRunner;
    tablePrefix: string;
    dbType: DatabaseType;
    isSqlite: boolean;
    isPostgres: boolean;
    dbName: string;
    migrationName: string;
    schemaBuilder: ReturnType<typeof createSchemaBuilder>;
    loadSurveyFromDisk(): string | null;
    parseJson<T>(data: string | T): T;
    escape: {
        columnName(name: string): string;
        tableName(name: string): string;
        indexName(name: string): string;
        triggerName(name: string): string;
        functionName(name: string): string;
    };
    runQuery<T>(sql: string, namedParameters?: ObjectLiteral): Promise<T>;
    runInBatches<T>(query: string, operation: (results: T[]) => Promise<void>, limit?: number): Promise<void>;
    copyTable(fromTable: string, toTable: string): Promise<void>;
    copyTable(fromTable: string, toTable: string, fromFields?: string[], toFields?: string[], batchSize?: number): Promise<void>;
}
export type MigrationFn = (ctx: MigrationContext) => Promise<void>;
export interface BaseMigration {
    up: MigrationFn;
    down?: MigrationFn | never;
    withFKsDisabled?: true;
}
export interface ReversibleMigration extends BaseMigration {
    down: MigrationFn;
}
export interface IrreversibleMigration extends BaseMigration {
    down?: never;
}
export interface Migration extends Function {
    prototype: ReversibleMigration | IrreversibleMigration;
}
export type InsertResult = Array<{
    insertId: number;
}>;
export { QueryFailedError } from '@n8n/typeorm/error/QueryFailedError';