171 lines
4.5 KiB
JavaScript
171 lines
4.5 KiB
JavaScript
/* Copyright (c) 2020, 2022, 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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* selectnestedcursor.js
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*
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* DESCRIPTION
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* An example of querying nested cursors that shows names of people living in
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* countries.
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*
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* This example requires node-oracledb 5.0.
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*
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*****************************************************************************/
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const fs = require('fs');
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const oracledb = require('oracledb');
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const dbConfig = require('./dbconfig.js');
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// On Windows and macOS, you can specify the directory containing the Oracle
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// Client Libraries at runtime, or before Node.js starts. On other platforms
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// the system library search path must always be set before Node.js is started.
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// See the node-oracledb installation documentation.
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// If the search path is not correct, you will get a DPI-1047 error.
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let libPath;
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if (process.platform === 'win32') { // Windows
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libPath = 'C:\\oracle\\instantclient_19_12';
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} else if (process.platform === 'darwin') { // macOS
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libPath = process.env.HOME + '/Downloads/instantclient_19_8';
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}
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if (libPath && fs.existsSync(libPath)) {
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oracledb.initOracleClient({ libDir: libPath });
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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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let sql, binds, options, result;
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connection = await oracledb.getConnection(dbConfig);
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//
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// Create a table
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//
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const stmts = [
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`DROP TABLE no_nc_people`,
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`CREATE TABLE no_nc_people (id NUMBER, name VARCHAR2(20), addresskey NUMBER)`,
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`DROP TABLE no_nc_address`,
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`CREATE TABLE no_nc_address (addresskey NUMBER, country VARCHAR2(20))`
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];
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for (const s of stmts) {
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try {
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await connection.execute(s);
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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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}
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//
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// Insert rows
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//
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sql = `INSERT INTO no_nc_people VALUES (:1, :2, :3)`;
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binds = [
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[101, "Alice", 201 ],
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[102, "Bruce", 203 ],
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[103, "Christine", 203 ],
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[104, "David", 201 ],
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[105, "Erica", 203 ],
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[106, "Frank", 202 ]
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];
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options = {
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autoCommit: true,
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bindDefs: [
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{ type: oracledb.NUMBER },
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{ type: oracledb.STRING, maxSize: 20 },
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{ type: oracledb.NUMBER },
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]
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};
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result = await connection.executeMany(sql, binds, options);
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sql = `INSERT INTO no_nc_address VALUES (:1, :2)`;
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binds = [
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[201, "Austria" ],
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[202, "Brazil" ],
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[203, "Chile" ]
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];
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options = {
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autoCommit: true,
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bindDefs: [
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{ type: oracledb.NUMBER },
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{ type: oracledb.STRING, maxSize: 20 }
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]
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};
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result = await connection.executeMany(sql, binds, options);
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//
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// For each country, show who lives there
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//
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sql = `SELECT country,
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CURSOR(SELECT name
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FROM no_nc_people p
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WHERE p.addresskey = a.addresskey
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ORDER by name
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) as NC
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FROM no_nc_address a
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ORDER BY country`;
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binds = {};
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options = {
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outFormat: oracledb.OUT_FORMAT_OBJECT
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};
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result = await connection.execute(sql, binds, options);
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console.log("Metadata: ");
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console.dir(result.metaData, { depth: null });
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console.log("Query results: ");
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console.dir(result.rows, {depth: null});
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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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