132 lines
4.1 KiB
JavaScript
132 lines
4.1 KiB
JavaScript
/* Copyright (c) 2015, 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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* insert2.js
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*
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* DESCRIPTION
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* Show the auto commit behavior.
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*
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* By default, node-oracledb does not commit on execute.
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* The driver also has commit() and rollback() methods to explicitly control transactions.
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*
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* Note: regardless of the auto commit mode, any open transaction
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* will be rolled back when a connection is closed.
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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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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 connection1, connection2;
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try {
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connection1 = await oracledb.getConnection(dbConfig);
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connection2 = await oracledb.getConnection(dbConfig);
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let result;
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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_tab2`,
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`CREATE TABLE no_tab2 (id NUMBER, name 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 connection1.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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// Show several examples of inserting
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//
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// Insert with autoCommit enabled
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result = await connection1.execute(
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`INSERT INTO no_tab2 VALUES (:id, :nm)`,
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[1, 'Chris'], // Bind values
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{ autoCommit: true} // Override the default, non-autocommit behavior
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);
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console.log("Rows inserted: " + result.rowsAffected); // 1
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// Insert without committing
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result = await connection1.execute(
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`INSERT INTO no_tab2 VALUES (:id, :nm)`,
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[2, 'Alison'], // Bind values
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// { autoCommit: true}, // Since this isn't set, operations using a second connection won't see this row
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);
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console.log("Rows inserted: " + result.rowsAffected); // 1
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// A query on the second connection will only show 'Chris' because
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// inserting 'Alison' is not commited by default. Uncomment the
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// autoCommit option above and you will see both rows
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result = await connection2.execute(
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`SELECT * FROM no_tab2`
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);
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console.log(result.rows);
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} catch (err) {
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console.error(err);
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} finally {
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try {
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if (connection1)
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await connection1.close();
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if (connection2)
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await connection2.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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run();
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