ExecuteRequest.ts

// Copyright 2024 by Teradata Corporation. All rights reserved.

// This sample program demonstrates how to execute a SQL request and display results.

// @ts-ignore
import * as teradatasql from "teradatasql";

if (process.argv.length != 6) {
    console.log("Parameters: Host User Password SQL");
    process.exit(1);
}

const sHost: string = process.argv[2];
const sUser: string = process.argv[3];
const sPassword: string = process.argv[4];
const sSQL: string = process.argv[5];

type Rows = any[];
type Row = any[] | null;

let con: teradatasql.TeradataConnection = teradatasql.connect({ host: sHost, user: sUser, password: sPassword });
try {
    let cur: teradatasql.TeradataCursor = con.cursor();
    try {
        console.log(`Executing ${sSQL}`);
        cur.execute(sSQL);

        for (let nResult: number = 1; ; nResult++) {
            const rows: Rows = cur.fetchall();

            for (let iRow: number = 0; iRow < rows.length; iRow++) {
                const row: Row = rows[iRow];

                for (let iColumn: number = 0; row != null && iColumn < row.length; iColumn++) {
                    let oValue: any = row[iColumn];
                    let sType: string = typeof oValue;

                    if (sType === "number") {
                        const n: number = Number(cur.description[iColumn][5]);
                        if (n > 0) {
                            oValue = oValue.toFixed(n);
                        }
                    } else if (sType === "object") {
                        sType = oValue.constructor.name;
                    }

                    if (sType === "Date") {
                        oValue = "toISOString: " + oValue.toISOString() + " toString: " + oValue.toString();
                    }

                    if (sType === "Uint8Array") {
                        oValue = Buffer.from(oValue).toString("hex");
                    }

                    console.log(`Result ${nResult} Row ${iRow + 1} Column ${iColumn + 1} ${cur.description[iColumn][0]} ${sType} = ${oValue}`);
                } // end for iColumn
            } // end for iRow

            if (!cur.nextset()) {
                break;
            }
        } // end for nResult
    } finally {
        cur.close();
    }
} finally {
    con.close();
}