131 lines
4.2 KiB
JavaScript
131 lines
4.2 KiB
JavaScript
/* Copyright (c) 2023, Oracle and/or its affiliates. */
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/******************************************************************************
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*
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* This software is dual-licensed to you under the Universal Permissive License
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* (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
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* 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
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* either license.
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*
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* If you elect to accept the software under the Apache License, Version 2.0,
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* the following applies:
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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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* typehandlerdate.js
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*
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* DESCRIPTION
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* Show how a type handler can format a queried date in a locale-specific
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* way.
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*
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*****************************************************************************/
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'use strict';
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Error.stackTraceLimit = 50;
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const oracledb = require('oracledb');
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const dbConfig = require('./dbconfig.js');
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// This example runs in both node-oracledb Thin and Thick modes.
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//
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// Optionally run in node-oracledb Thick mode
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if (process.env.NODE_ORACLEDB_DRIVER_MODE === 'thick') {
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// Thick mode requires Oracle Client or Oracle Instant Client libraries.
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// On Windows and macOS Intel you can specify the directory containing the
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// libraries at runtime or before Node.js starts. On other platforms (where
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// Oracle libraries are available) the system library search path must always
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// include the Oracle library path before Node.js starts. If the search path
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// is not correct, you will get a DPI-1047 error. See the node-oracledb
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// installation documentation.
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let clientOpts = {};
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// On Windows and macOS Intel platforms, set the environment
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// variable NODE_ORACLEDB_CLIENT_LIB_DIR to the Oracle Client library path
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if (process.platform === 'win32' || (process.platform === 'darwin' && process.arch === 'x64')) {
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clientOpts = { libDir: process.env.NODE_ORACLEDB_CLIENT_LIB_DIR };
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}
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oracledb.initOracleClient(clientOpts); // enable node-oracledb Thick mode
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}
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console.log(oracledb.thin ? 'Running in thin mode' : 'Running in thick mode');
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// The fetch type handler is called once per column in the SELECT list.
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// If the metadata name & type tests are satified, then the returned
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// converter function is enabled for that column. Data in this column will
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// be processed by the converter function before it is returned to the
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// application.
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function fth(metaData) {
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if (metaData.name == 'D_COL' && metaData.dbType === oracledb.DB_TYPE_DATE) {
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return {converter: formatDate};
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}
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}
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// Format dates using a German display format
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function formatDate(val) {
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if (val !== null) {
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val = val.toLocaleString('de-DE');
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}
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return val;
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}
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async function run() {
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let connection;
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try {
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connection = await oracledb.getConnection(dbConfig);
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console.log('1. Creating Table');
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try {
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await connection.execute(`DROP TABLE no_typehandler_tab`);
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} catch (e) {
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if (e.errorNum != 942)
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console.error(e);
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}
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await connection.execute(
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`CREATE TABLE no_typehandler_tab (d_col DATE)`);
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const data = new Date(1995, 11, 17); // 17th Dec 1995
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console.log('2. Inserting date ' + data);
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const inssql = `INSERT INTO no_typehandler_tab (d_col) VALUES (:bv)`;
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await connection.execute(inssql, { bv: data });
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console.log('3. Selecting the date');
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const result = await connection.execute(
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"select d_col from no_typehandler_tab",
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[],
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{ fetchTypeHandler: fth }
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);
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console.log(`Column ${result.metaData[0].name} is formatted as ${result.rows[0][0]}`);
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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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