teradatasql/samples/CancelSleep.js

Teradata SQL Driver for Node.js

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const teradatasql = __importStar(require("teradatasql"));
async function worker(cur) {
    let dStart = 0;
    let dElapsed = 0;
    try {
        dStart = Date.now();
        let sql = "select mysleep (10)";
        console.log(`worker ${sql}`);
        await cur.executeAsync(sql);
        dElapsed = Date.now() - dStart;
    }
    catch (error) {
        dElapsed = Date.now() - dStart;
        console.log(`worker received error: ${error.message.split("\n")[0]}`);
    }
    finally {
        console.log(`worker completed in ${dElapsed / 1000} seconds`);
    }
}
async function main() {
    const con = teradatasql.connect({ host: "whomooz", user: "guest", password: "please" });
    try {
        const cur = con.cursor();
        try {
            let sql = "drop function mysleep";
            console.log(`main ${sql}`);
            cur.execute(sql, undefined, 5589);
            sql =
                "create function mysleep (integer) returns integer language c no sql parameter style sql external name 'CS!udfsleep!udfsleep.c!F!udfsleep'";
            console.log(`main ${sql}`);
            cur.execute(sql);
            try {
                console.log("main starting worker");
                const result = worker(cur);
                console.log("main waiting for 5 seconds");
                const dStart = Date.now();
                await new Promise((resolve) => setTimeout(resolve, 5000));
                const dElapsed = Date.now() - dStart;
                console.log(`main waited ${dElapsed / 1000} seconds`);
                try {
                    console.log("main calling cancel");
                    con.cancel();
                    console.log("main completed cancel");
                }
                catch (error) {
                    console.log(`main ${error.message}`);
                }
                try {
                    console.log("main waiting for worker to finish");
                    await result;
                    console.log("main done waiting for worker");
                }
                catch (error) {
                    console.log(`main ${error.message}`);
                }
            }
            finally {
                sql = "drop function mysleep";
                console.log(`main ${sql}`);
                cur.execute(sql);
            }
        }
        finally {
            cur.close();
        }
    }
    finally {
        con.close();
    }
}
main();
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