/// <reference types="websql" />
import * as Promise from 'bluebird';
import TypedError = require('typed-error');
export interface CodedError extends Error {
    code: number | string;
    constructor: Function;
}
export interface Row {
    [fieldName: string]: any;
}
export interface Result {
    rows: Array<Row>;
    rowsAffected: number;
    insertId?: number;
}
export declare type Sql = string;
export declare type Bindings = any[];
export declare class DatabaseError extends TypedError {
    code: number | string;
    constructor(message?: string | CodedError | SQLError);
}
export declare class ConstraintError extends DatabaseError {
}
export declare class UniqueConstraintError extends ConstraintError {
}
export declare class ForeignKeyConstraintError extends ConstraintError {
}
export declare type Database = {
    DatabaseError: typeof DatabaseError;
    ConstraintError: typeof ConstraintError;
    UniqueConstraintError: typeof UniqueConstraintError;
    ForeignKeyConstraintError: typeof ForeignKeyConstraintError;
    engine: string;
    executeSql: (this: Database, sql: Sql, bindings?: Bindings) => Promise<Tx>;
    transaction: (callback?: ((tx: Tx) => void)) => Promise<Tx>;
};
export declare const engines: {
    [engine: string]: (connectString: string | object) => Database;
};
export declare abstract class Tx {
    private automaticCloseTimeout;
    private automaticClose;
    constructor(stackTraceErr?: Error);
    private pending;
    private incrementPending;
    private decrementPending;
    cancelPending(): void;
    private closeTransaction;
    executeSql(sql: Sql, bindings?: Bindings, ...args: any[]): Promise<Result>;
    rollback(): Promise<void>;
    end(): Promise<void>;
    private listeners;
    on(name: 'end', fn: () => void): void;
    on(name: 'rollback', fn: () => void): void;
    protected abstract _executeSql(sql: Sql, bindings: Bindings, addReturning?: false | string): Promise<Result>;
    protected abstract _rollback(): Promise<void>;
    protected abstract _commit(): Promise<void>;
    abstract tableList(extraWhereClause?: string): Promise<Result>;
    dropTable(tableName: string, ifExists?: boolean): Promise<any>;
}
export declare const connect: (databaseOptions: {
    engine: string;
    params: {};
}) => Database;