import type { Dialect } from '../dialect';
import type { QueryToMaterialize, StructDef, Query } from './malloy_types';
export declare class StageWriter {
    parent: StageWriter | undefined;
    withs: string[];
    stageNames: string[];
    udfs: string[];
    pdts: string[];
    dependenciesToMaterialize: Record<string, QueryToMaterialize>;
    stagePrefix: string;
    useCTE: boolean;
    stageNumber: number;
    constructor(useCTE: boolean | undefined, parent: StageWriter | undefined);
    private nextName;
    getName(id: number): string;
    root(): StageWriter;
    addStage(sql: string): string;
    addUDF(stageWriter: StageWriter, dialect: Dialect, structDef: StructDef): string;
    addMaterializedQuery(fieldName: string, query: Query, materializatedTablePrefix?: string): string;
    addPDT(baseName: string, dialect: Dialect): string;
    combineStages(includeLastStage: boolean): {
        sql: string;
        lastStageName: string | undefined;
    };
    /** emit the SQL for all the stages.  */
    generateSQLStages(): string;
    generateCoorelatedSubQuery(dialect: Dialect, structDef: StructDef): string;
}