import { BigQuery, TableSchema } from "@google-cloud/bigquery";
export declare class BigQueryService {
    private client;
    private config;
    constructor();
    getClient(): BigQuery;
    getDownloadDir(): string;
    executeQuery(query: string): Promise<Record<string, unknown>[]>;
    listTables(datasetId: string): Promise<string[]>;
    getTableSchema(datasetId: string, tableId: string): Promise<TableSchema>;
}
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