import { ConditionParam, Constructable, SelectParam } from "../util.ts";
import { SqlStatementDataset, SqlStatement } from "../SqlStatement.ts";
import { ChainUpdate, ChainUpdateAfterForm, ChainUpdateAfterSet, ChainUpdateReturning } from "./update_chain.ts";
export declare class UpdateChain extends SqlStatement implements ChainUpdate {
    private sql;
    constructor(sql: string);
    from(...from: Constructable<string>[]): ChainUpdateAfterForm;
    /**
     * @example
     * ```ts
     * // SET age=3, name='hi', count=b.count
     * set({age: "3", name: "'hi'", count:"b.count"})
     * set(["age = 3", "name = 'hi'", "count = b.count"])
     * set("age = 3, name = 'hi', count = b.count")
     *
     * ```
     */
    set(values: Constructable<Record<string, string | undefined> | string[] | string>): ChainUpdateAfterSet;
    returning<R extends {}>(returns: Constructable<SelectParam | "*">): SqlStatementDataset<R>;
    where(where: Constructable<ConditionParam | void>): ChainUpdateReturning;
    genSql(): string;
}