/// <amd-module name="@dataform/api/dbadapters/bigquery" />
import { Credentials } from "@dataform/api/commands/credentials";
import { IDbAdapter, OnCancel } from "@dataform/api/dbadapters/index";
import { dataform } from "@dataform/protos";
interface IBigQueryTableMetadata {
    type: string;
    schema: {
        fields: IBigQueryFieldMetadata[];
    };
    tableReference: {
        projectId: string;
        datasetId: string;
        tableId: string;
    };
    lastModifiedTime: string;
    description?: string;
}
interface IBigQueryFieldMetadata {
    name: string;
    mode: string;
    type: string;
    fields?: IBigQueryFieldMetadata[];
    description?: string;
}
export declare class BigQueryDbAdapter implements IDbAdapter {
    static create(credentials: Credentials): Promise<BigQueryDbAdapter>;
    private bigQueryCredentials;
    private pool;
    private readonly clients;
    private constructor();
    execute(statement: string, options?: {
        onCancel?: OnCancel;
        interactive?: boolean;
        maxResults?: number;
    }): Promise<any>;
    evaluate(statement: string): Promise<dataform.QueryEvaluationResponse>;
    tables(): Promise<dataform.ITarget[]>;
    table(target: dataform.ITarget): Promise<dataform.ITableMetadata>;
    preview(target: dataform.ITarget, limitRows?: number): Promise<any[]>;
    prepareSchema(database: string, schema: string): Promise<void>;
    dropSchema(database: string, schema: string): Promise<void>;
    close(): Promise<void>;
    prepareStateMetadataTable(): Promise<void>;
    persistedStateMetadata(): Promise<dataform.IPersistedTableMetadata[]>;
    persistStateMetadata(actions: dataform.IExecutionAction[]): Promise<void>;
    setMetadata(action: dataform.IExecutionAction): Promise<any>;
    getMetadata(target: dataform.ITarget): Promise<IBigQueryTableMetadata>;
    deleteStateMetadata(actions: dataform.IExecutionAction[]): Promise<void>;
    private getMetadataOutsidePromisePool;
    private getClient;
    private runQuery;
    private createQueryJob;
}
export {};