126 lines
3.9 KiB
JavaScript
126 lines
3.9 KiB
JavaScript
/* Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved. */
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/******************************************************************************
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*
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* You may not use the identified files except in compliance with the Apache
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* License, Version 2.0 (the "License.")
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*
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* NAME
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* date.js
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*
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* DESCRIPTION
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* Insert and query DATE and TIMESTAMP columns.
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*
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* When bound in an INSERT, JavaScript Dates are inserted using
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* TIMESTAMP WITH LOCAL TIMEZONE. Similarly for queries, TIMESTAMP
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* and DATE columns are fetched as TIMESTAMP WITH LOCAL TIMEZONE.
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*
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* This example uses Node 8's async/await syntax.
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*
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*****************************************************************************///
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// Using a fixed Oracle time zone helps avoid machine and deployment differences
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process.env.ORA_SDTZ = 'UTC';
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const oracledb = require('oracledb');
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const dbConfig = require('./dbconfig.js');
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oracledb.outFormat = oracledb.OUT_FORMAT_OBJECT;
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async function run() {
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let connection;
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try {
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let result, date;
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connection = await oracledb.getConnection(dbConfig);
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console.log('Creating table');
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await connection.execute(
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`BEGIN
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DECLARE
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e_table_exists EXCEPTION;
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PRAGMA EXCEPTION_INIT(e_table_exists, -00942);
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BEGIN
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EXECUTE IMMEDIATE ('DROP TABLE datetest');
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EXCEPTION
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WHEN e_table_exists
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THEN NULL;
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END;
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END;`);
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await connection.execute(
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`CREATE TABLE datetest(
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id NUMBER,
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timestampcol TIMESTAMP,
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timestamptz TIMESTAMP WITH TIME ZONE,
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timestampltz TIMESTAMP WITH LOCAL TIME ZONE,
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datecol DATE)`);
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// When bound, JavaScript Dates are inserted using TIMESTAMP WITH LOCAL TIMEZONE
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date = new Date();
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console.log('Inserting JavaScript date: ' + date);
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result = await connection.execute(
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`INSERT INTO datetest (id, timestampcol, timestamptz, timestampltz, datecol)
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VALUES (1, :ts, :tstz, :tsltz, :td)`,
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{ ts: date, tstz: date, tsltz: date, td: date });
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console.log('Rows inserted: ' + result.rowsAffected );
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console.log('Query Results:');
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result = await connection.execute(
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`SELECT id, timestampcol, timestamptz, timestampltz, datecol,
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TO_CHAR(CURRENT_DATE, 'DD-Mon-YYYY HH24:MI') AS CD
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FROM datetest
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ORDER BY id`);
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console.log(result.rows);
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console.log('Altering session time zone');
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await connection.execute(`ALTER SESSION SET TIME_ZONE='+5:00'`); // resets ORA_SDTZ value
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date = new Date();
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console.log('Inserting JavaScript date: ' + date);
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result = await connection.execute(
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`INSERT INTO datetest (id, timestampcol, timestamptz, timestampltz, datecol)
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VALUES (2, :ts, :tstz, :tsltz, :td)`,
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{ ts: date, tstz: date, tsltz: date, td: date });
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console.log('Rows inserted: ' + result.rowsAffected );
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console.log('Query Results:');
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result = await connection.execute(
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`SELECT id, timestampcol, timestamptz, timestampltz, datecol,
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TO_CHAR(CURRENT_DATE, 'DD-Mon-YYYY HH24:MI') AS CD
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FROM datetest
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ORDER BY id`);
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console.log(result.rows);
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// Show the queried dates are of type Date
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let ts = result.rows[0]['TIMESTAMPCOL'];
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ts.setDate(ts.getDate() + 5);
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console.log('TIMESTAMP manipulation in JavaScript:', ts);
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} catch (err) {
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console.error(err);
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} finally {
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if (connection) {
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try {
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await connection.close();
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} catch (err) {
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console.error(err);
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}
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}
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}
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}
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run();
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