node-oracledb/examples/example.js

/* Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved. */

/******************************************************************************
 *
 * You may not use the identified files except in compliance with the Apache
 * License, Version 2.0 (the "License.")
 *
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * NAME
 *   example.js
 *
 * DESCRIPTION
 *   A basic node-oracledb example using Node.js 8's async/await syntax.
 *
 *   For a connection pool example see connectionpool.js
 *   For a ResultSet example see resultset2.js
 *   For a query stream example see selectstream.js
 *   For a Promise example see promises.js
 *   For a callback example see select1.js
 *
 *   This example requires node-oracledb 2.2 or later.
 *
 *****************************************************************************/

// Using a fixed Oracle time zone helps avoid machine and deployment differences
process.env.ORA_SDTZ = 'UTC';

var oracledb = require('oracledb');
var dbConfig = require('./dbconfig.js');

async function run() {
  let connection;

  try {

    let sql, binds, options, result;

    connection = await oracledb.getConnection(  {
      user          : dbConfig.user,
      password      : dbConfig.password,
      connectString : dbConfig.connectString
    });

    // Create a table

    await connection.execute(
      `BEGIN
         EXECUTE IMMEDIATE 'DROP TABLE mytab';
         EXCEPTION
         WHEN OTHERS THEN
           IF SQLCODE NOT IN (-00942) THEN
             RAISE;
           END IF;
       END;`);

    await connection.execute(
      `CREATE TABLE mytab (id NUMBER, data VARCHAR2(20))`);

    // Insert some data

    sql = `INSERT INTO mytab VALUES (:1, :2)`;

    binds = [ [101, "Alpha" ], [102, "Beta" ], [103, "Gamma" ] ];

    // For a complete list of options see the documentation.
    options = {
      autoCommit: true,
      // batchErrors: true,  // continue processing even if there are data errors
      bindDefs: [
        { type: oracledb.NUMBER },
        { type: oracledb.STRING, maxSize: 20 }
      ]
    };

    result = await connection.executeMany(sql, binds, options);

    console.log("Number of rows inserted:", result.rowsAffected);

    // Query the data

    sql = `SELECT * FROM mytab`;

    binds = {};

    // For a complete list of options see the documentation.
    options = {
      outFormat: oracledb.OBJECT   // query result format
      // extendedMetaData: true,   // get extra metadata
      // fetchArraySize: 100       // internal buffer allocation size for tuning
    };

    result = await connection.execute(sql, binds, options);

    console.log("Column metadata: ", result.metaData);
    console.log("Query results: ");
    console.log(result.rows);

    // Show the date.  The value of ORA_SDTZ affects the output

    sql = `SELECT TO_CHAR(CURRENT_DATE, 'DD-Mon-YYYY HH24:MI') AS CD FROM DUAL`;
    result = await connection.execute(sql, binds, options);
    console.log("Current date query results: ");
    console.log(result.rows[0]['CD']);

  } catch (err) {
    console.error(err);
  } finally {
    if (connection) {
      try {
        await connection.close();
      } catch (err) {
        console.error(err);
      }
    }
  }
}

run();