/// <reference types="node" />
/// <reference types="node" />
import { Readable } from "stream";
import { ConnectionOptions } from "tls";
import { DQLKeyword } from "./Statement";
export interface HDBClientOption extends ConnectionOptions {
    /**
     * @default 1024
     */
    fetchSize?: number;
    /**
     * @default true
     */
    holdCursorsOverCommit?: boolean;
    /**
     * @default true
     */
    scrollableCursor?: boolean;
    /**
     * This is suitable for multiple-host SAP HANA systems which are distributed over several hosts.
     * The client establishes a connection to the first available host from the list.
     */
    hosts?: Array<ConnectionOptions>;
    /**
     * instance number of the HANA system
     * @example '00'
     */
    instanceNumber?: string;
    user: string;
    password: string;
    /**
     * name of a particular tenant database
     *
     * @example DB01
     */
    databaseName?: string;
    /**
     * Use the useTLS option if you would like to connect to SAP HANA using Node.js's trusted certificates
     * @default false
     */
    useTLS?: boolean;
    /**
     * If your SQL statement is a join with overlapping column names, you may want to get separate objects for each table per row.
     *
     * This is possible if you set option nestTables to TRUE
     *
     * @default false
     */
    nestTables?: boolean;
    /**
     * It is also possible to return all rows as an array where the order of the column values is exactly the same as in the resultSetMetadata.
     * In this case you have to set the option rowsAsArray to TRUE:
     *
     * @default false
     */
    rowsAsArray?: boolean;
    /**
     * The SAP HANA server connectivity protocol uses CESU-8 encoding. Node.js does not support CESU-8 natively and the driver by default converts all text to CESU-8 format in the JavaScript layer including SQL statements.
     *
     * Due to the fact that Node.js has built-in support for UTF-8, using UTF-8 in the HDB drivers can lead to performance gains especially for large text data. If you are sure that your data contains only BMP characters, you can disable CESU-8 conversion by setting a flag in the client configuration.
     *
     * @default true
     */
    useCesu8?: boolean;
}
export type ReadyState = "new" | "open" | "connected" | "closed" | "disconnected";
export interface HDBReadableStream<T = any> extends Readable {
    [Symbol.asyncIterator](): AsyncIterableIterator<T>;
}
type UnionToIntersection<U> = (U extends any ? (k: U) => void : never) extends ((k: infer I) => void) ? I : never;
type LastOf<T> = UnionToIntersection<T extends any ? () => T : never> extends () => (infer R) ? R : never;
type Push<T extends any[], V> = [...T, V];
type TupleUnion<T, L = LastOf<T>, N = [T] extends [never] ? true : false> = true extends N ? [] : Push<TupleUnion<Exclude<T, L>>, L>;
export type ObjValueTuple<T, KS extends any[] = TupleUnion<keyof T>, R extends any[] = []> = KS extends [infer K, ...infer KT] ? ObjValueTuple<T, KT, [...R, T[K & keyof T]]> : R;
export type TrimSpace<T> = T extends ` ${infer Rest}` ? T extends `${infer Rest} ` ? TrimSpace<Rest> : TrimSpace<Rest> : T;
/**
 * "Id" => Id
 * Id => ID
 */
export type ExtractIdentifier<Target extends string> = Target extends `"${infer inner}"` ? inner : Uppercase<Target>;
export type ExtractAs<Target extends string> = Target extends `${infer _}${"as" | "AS"}${infer id}` ? TrimSpace<id> : Target;
export type ExtractColumns<Target extends string, Delimiter extends string = ","> = Target extends `${infer v1}${Delimiter}${infer v2}` ? ExtractColumns<v1, Delimiter> | ExtractColumns<TrimSpace<v2>, Delimiter> : ExtractIdentifier<ExtractAs<Target>>;
/**
 * @example
 * ```ts
 * ExtractSelect<'select "Id", NAME as P_NAME from t'> // => {Id:any,P_NAME:any}
 * ```
 */
export type ExtractSelect<Sql extends string> = Sql extends `${DQLKeyword | Uppercase<DQLKeyword>}${infer parts}${"from" | Uppercase<"FROM">}${any}` ? TupleToObject<ExtractColumns<TrimSpace<parts>>> : never;
/**
 * @example
 *
 * ```ts
 * ExtractArguments<"Select a from b where c = ?, b = ?"> // => [any,any]
 * ```
 */
export type ExtractArguments<Sql extends string> = Sql extends `${infer v1}?${infer v2}` ? [
    ...ExtractArguments<v1>,
    any,
    ...ExtractArguments<v2>
] : [];
type TupleToObject<T extends string> = {
    [key in T]: any;
};
export type NotEmptyArray<T> = [T, ...T[]];
/**
 * HDB Data Type
 */
export declare enum DataType {
    NULL = 0,
    TINYINT = 1,
    SMALLINT = 2,
    INT = 3,
    BIGINT = 4,
    DECIMAL = 5,
    REAL = 6,
    DOUBLE = 7,
    CHAR = 8,
    VARCHAR = 9,
    NCHAR = 10,
    NVARCHAR = 11,
    BINARY = 12,
    VARBINARY = 13,
    DATE = 14,
    TIME = 15,
    TIMESTAMP = 16,
    CLOB = 25,
    NCLOB = 26,
    BLOB = 27,
    BOOLEAN = 28,
    STRING = 29,
    NSTRING = 30,
    BLOCATOR = 31,
    NLOCATOR = 32,
    BSTRING = 33,
    ABAPITAB = 48,
    ABAPSTRUCT = 49,
    ARRAY = 50,
    TEXT = 51,
    SHORTTEXT = 52,
    ALPHANUM = 55,
    TLOCATOR = 56,
    LONGDATE = 57,
    SECONDDATE = 58,
    DAYDATE = 59,
    SECONDTIME = 60
}
/**
 * HDB Column Metadata
 */
export interface Column {
    columnDisplayName: string;
    columnName: string;
    dataType: DataType;
    fraction: number;
    length: number;
    mode: number;
    schemaName?: string;
    tableName: string;
}
/**
 * Function Code
 */
export declare enum FunctionCode {
    NIL = 0,
    DDL = 1,
    INSERT = 2,
    UPDATE = 3,
    DELETE = 4,
    SELECT = 5,
    SELECT_FOR_UPDATE = 6,
    EXPLAIN = 7,
    DB_PROCEDURE_CALL = 8,
    DB_PROCEDURE_CALL_WITH_RESULT = 9,
    FETCH = 10,
    COMMIT = 11,
    ROLLBACK = 12,
    SAVEPOINT = 13,
    CONNECT = 14,
    WRITE_LOB = 15,
    READ_LOB = 16,
    PING = 17,
    DISCONNECT = 18,
    CLOSE_CURSOR = 19,
    FIND_LOB = 20,
    ABAP_STREAM = 21,
    XA_START = 22,
    XA_JOIN = 23
}
export {};