teradatasql/samples/BatchInsertJSON.js

Teradata SQL Driver for Node.js

"use strict";
// Copyright 2026 by Teradata Corporation. All rights reserved.
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Object.defineProperty(exports, "__esModule", { value: true });
// This sample program demonstrates how to insert a batch of rows using a JSON file.
// It also illustrates dual treatment of a nested JSON object: the raw JSON
// string is stored verbatim in the "address" column, while the flattened
// sub-field "city" is stored in a separate column.
const fs = __importStar(require("fs"));
// @ts-ignore
const teradatasql = __importStar(require("teradatasql"));
// Each record has three top-level keys:
//   id      -- scalar integer
//   name    -- scalar string
//   address -- nested object; its raw JSON string maps to the "address" column
//              and its sub-field "city" maps to the "city" column.
const records = [
    { id: 1, name: "Alice", address: { city: "Boston" } },
    { id: 2, name: "Bob", address: { city: "Austin" } },
    { id: 3, name: "Carol", address: { city: "Chicago" } },
    { id: 4, name: "Dave", address: { city: "Denver" } },
    { id: 5, name: "Erin", address: { city: "Eugene" } },
    { id: 6, name: "Frank", address: { city: "Fresno" } },
    { id: 7, name: "Grace", address: { city: "Houston" } },
    { id: 8, name: "Hank", address: { city: "Irvine" } },
    { id: 9, name: "Iris", address: { city: "Jacksonville" } },
];
const con = teradatasql.connect({ host: "whomooz", user: "guest", password: "please" });
try {
    const cur = con.cursor();
    try {
        cur.execute("create volatile table voltab (id integer, name varchar(20), address varchar(200), city varchar(20)) on commit preserve rows");
        const sFileName = "dataBatchJs.json";
        console.log(`Writing ${sFileName}`);
        fs.writeFileSync(sFileName, JSON.stringify(records));
        try {
            // The INSERT column list (id, name, address, city) drives name-based matching:
            //   ?1 -> id      (scalar)
            //   ?2 -> name    (scalar)
            //   ?3 -> address (raw JSON object string -- dual treatment)
            //   ?4 -> city    (flattened sub-field of address)
            console.log("Inserting data");
            cur.execute(`{fn teradata_read_json(${sFileName})} insert into voltab (id, name, address, city) values (?, ?, ?, ?)`);
        }
        finally {
            fs.unlinkSync(sFileName);
        }
        cur.execute("select id, name, address, city from voltab order by 1");
        console.log(cur.fetchall());
    }
    finally {
        cur.close();
    }
}
finally {
    con.close();
}
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