import { InsertQuery } from "../models/InsertQuery";
/**
 * Utility to convert INSERT ... VALUES statements into INSERT ... SELECT UNION ALL form and vice versa.
 * Enables easier column-by-column comparison across multi-row inserts.
 */
export declare class InsertQuerySelectValuesConverter {
    /**
     * Converts an INSERT query that uses VALUES into an equivalent INSERT ... SELECT UNION ALL form.
     * The original InsertQuery remains untouched; the returned InsertQuery references cloned structures.
     */
    static toSelectUnion(insertQuery: InsertQuery): InsertQuery;
    /**
     * Converts an INSERT query that leverages SELECT statements (with optional UNION ALL)
     * into an equivalent INSERT ... VALUES representation.
     */
    static toValues(insertQuery: InsertQuery): InsertQuery;
    private static flattenSelectQueries;
}