import { Queryable } from '@pgkit/client';
import { PostgreSQL } from '@pgkit/schemainspect';
import { Changes } from './changes';
import { Statements } from './statements';
export declare class Migration {
    statements: Statements;
    changes: Changes;
    schema: string | null;
    exclude_schema: string | string[] | null;
    s_from: Queryable | PostgreSQL;
    s_target: Queryable | PostgreSQL;
    private constructor();
    static create(x_from: Queryable | PostgreSQL, x_target: Queryable | PostgreSQL, { schema, exclude_schema, ignore_extension_versions }: {
        schema?: string;
        exclude_schema?: string | string[];
        ignore_extension_versions?: boolean;
    }): Promise<Migration>;
    inspect_from(): Promise<void>;
    inspect_target(): Promise<void>;
    clear(): void;
    apply(): Promise<void>;
    add(statements: Statements): void;
    add_sql(statement: string): void;
    set_safety(safety_on: boolean): void;
    add_extension_changes({ creates, drops }?: {
        creates?: boolean;
        drops?: boolean;
    }): void;
    add_all_changes(privileges?: boolean): void;
    get sql(): string;
}