112 lines
3.3 KiB
JavaScript
112 lines
3.3 KiB
JavaScript
/* Copyright (c) 2016, 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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* lobinserttemp.js
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*
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* DESCRIPTION
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* Creates a 'temporary CLOB', loads clobexample.txt into it, and
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* then INSERTs it into a CLOB column.
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*
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* You may prefer the method shown in lobinsert2.js, which inserts
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* directly into the table.
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*
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* Create clobexample.txt before running this example.
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* Use demo.sql to create the required schema.
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*
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* This example requires node-oracledb 1.12 or later.
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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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var fs = require('fs');
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var oracledb = require('oracledb');
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var dbConfig = require('./dbconfig.js');
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var inFileName = 'clobexample.txt'; // the file with text to be inserted into the database
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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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// Cleanup anything other than lobinsert1.js demo data
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await connection.execute(`DELETE FROM mylobs WHERE id > 2`);
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// Write into a temporary LOB.
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// An alternative would be to stream into it.
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let tempLob = await connection.createLob(oracledb.CLOB);
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const data = fs.readFileSync(inFileName, 'utf8');
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tempLob.write(data);
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tempLob.write("That's all!");
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await tempLob.end(); // indicate the app has no more data to insert
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const doInsert = new Promise((resolve, reject) => {
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// The 'finish' event is emitted when node-oracledb has
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// processed all data for the Temporary LOB
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tempLob.on('finish', async () => {
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try {
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console.log('Inserting the temporary LOB into the database');
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const result = await connection.execute(
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`INSERT INTO mylobs (id, c) VALUES (:idbv, :lobbv)`,
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{
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idbv: 3,
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lobbv: tempLob
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},
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{
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autoCommit: true
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});
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console.log("Rows inserted: " + result.rowsAffected);
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} catch (err) {
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reject(err);
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} finally {
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if (tempLob) {
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try {
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// Applications should close LOBs that were created using createLob()
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console.log('Closing the temporary LOB');
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await tempLob.close();
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resolve();
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} catch (err) {
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reject(err);
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}
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}
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}
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}); // end 'finish'
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}); // end Promise
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await doInsert;
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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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