import * as Bluebird from "bluebird";
import { Column } from "anydb-sql";
import { Transaction } from "./transaction-like";
/**
 * Generates or drops database indexes.
 */
declare class DatabaseIndexGenerator {
    private readonly tx;
    /**
     * Creates an instance of DatabaseIndexGenerator.
     * @param {Transaction} tx the database transaction to use to generate the indexes.
     * @memberof DatabaseIndexGenerator
     */
    constructor(tx: Transaction);
    private getIndexesFromSet;
    private executeQueries;
    /**
     * Creates a set of indexes.
     * @param columnSets a list of indexes to create,
     * each defined by a list of columns to create them on. The columns must all belong to the same table.
     * @returns
     * @memberof DatabaseIndexGenerator
     */
    createIndexSets(columnSets: DatabaseIndexGenerator.ColumnSet[]): Bluebird<void[]>;
    /**
     * Drops a set of indexes.
     * @param columnSets a list of indexes to drop
     * each defined by a list of columns that they were created on. The columns must all belong to the same table.
     * @returns
     * @memberof DatabaseIndexGenerator
     */
    dropIndexSets(columnSets: DatabaseIndexGenerator.ColumnSet[]): Bluebird<void[]>;
}
declare namespace DatabaseIndexGenerator {
    type ColumnSet = Column<any>[];
}
export = DatabaseIndexGenerator;