import { Client, QueryResult } from 'pg';
import { bus } from '../bus';
import { Migrator } from '../internal';
export declare const PgType: {
    readonly bigint: "bigint";
    readonly boolean: "boolean";
    readonly timestamptz: "timestamp with time zone";
    readonly double: "double precision";
    readonly real: "real";
    readonly integer: "integer";
    readonly serial: "serial";
    readonly text: "text";
    readonly uuid: "uuid";
};
export declare type PgType = typeof PgType[keyof typeof PgType];
export declare const colToPG: (col: "bigint" | "boolean" | "text" | "integer" | "float" | "double" | "datetime" | "serial" | "uuid" | "updatedAt") => "bigint" | "boolean" | "text" | "integer" | "serial" | "uuid" | "timestamp with time zone" | "double precision" | "real";
export declare class PostgresMigrator extends Migrator {
    _db: bus.DB;
    _client?: Client;
    constructor(db: bus.DB);
    connect: () => Promise<Client>;
    disconnect: () => Promise<Client>;
    execute: <T = any>(query: string, params?: any[] | undefined) => Promise<QueryResult<T>>;
    protected lit: (lit: any) => string;
    protected id: (id: string) => string;
    initialize: () => Promise<boolean>;
    addTable: (action: bus.ducks.addTable.Action) => Promise<boolean>;
    dropTable: (action: string) => Promise<boolean>;
    addColumn: (action: bus.ducks.addColumn.Action) => Promise<boolean>;
    dropColumn: (table: string, column: string) => Promise<boolean>;
    getCommits: () => Promise<{
        name: string;
        created_at: Date;
    }[]>;
    commit: (action: bus.ducks.commit.Action) => Promise<boolean>;
    protected addIndex: (table: string, column: string) => Promise<void>;
    protected addUniquenessConstraint: (table: string, columns: string[]) => Promise<void>;
    protected addForeignKey: (referencing: string, fkColumn: string, referenced: string) => Promise<void>;
    beginTransaction: () => Promise<void>;
    commitTransaction: () => Promise<void>;
    rollbackTransaction: () => Promise<void>;
    protected addForeignKeyRelation: (action: bus.ducks.oneToOne.Action | bus.ducks.oneToMany.Action, schema: bus.Schema) => Promise<boolean>;
    oneToOne: (action: bus.ducks.oneToOne.Action, schema: bus.Schema) => Promise<boolean>;
    oneToMany: (action: bus.ducks.oneToMany.Action, schema: bus.Schema) => Promise<boolean>;
    manyToMany: (action: bus.ducks.manyToMany.Action, schema: bus.Schema) => Promise<boolean>;
}