114 lines
3.6 KiB
JavaScript
114 lines
3.6 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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* lobinsert2.js
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*
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* DESCRIPTION
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* INSERTs text into a CLOB column using the 'RETURNING INTO' method.
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*
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* For smaller LOBs you will probably prefer the method shown in lobinsert1.js
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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 table or do:
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* DROP TABLE mylobs;
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* CREATE TABLE mylobs (id NUMBER, c CLOB, b BLOB);
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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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*****************************************************************************/
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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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oracledb.getConnection(
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{
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user : dbConfig.user,
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password : dbConfig.password,
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connectString : dbConfig.connectString
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},
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function(err, connection) {
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if (err) { console.error(err.message); return; }
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connection.execute(
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"INSERT INTO mylobs (id, c) VALUES (:id, EMPTY_CLOB()) RETURNING c INTO :lobbv",
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{ id: 4, lobbv: {type: oracledb.CLOB, dir: oracledb.BIND_OUT} },
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{ autoCommit: false }, // a transaction needs to span the INSERT and pipe()
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function(err, result) {
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if (err) { console.error(err.message); return; }
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if (result.rowsAffected != 1 || result.outBinds.lobbv.length != 1) {
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console.error('Error getting a LOB locator');
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return;
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}
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var errorHandled = false;
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var lob = result.outBinds.lobbv[0];
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lob.on(
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'close',
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function() {
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console.log("lob.on 'close' event");
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connection.commit(
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function(err) {
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if (!errorHandled) {
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errorHandled = true;
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if (err) {
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console.error(err);
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} else {
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console.log("Text inserted successfully.");
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}
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connection.close(function(err) {
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if (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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lob.on(
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'error',
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function(err) {
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console.log("lob.on 'error' event");
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if (!errorHandled) {
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errorHandled = true;
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console.error(err);
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lob.close(function(err) {
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if (err) {
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console.error(err.message);
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}
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});
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}
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});
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console.log('Reading from ' + inFileName);
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var inStream = fs.createReadStream(inFileName);
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inStream.on(
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'error',
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function(err) {
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console.log("inStream.on 'error' event");
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if (!errorHandled) {
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errorHandled = true;
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console.error(err);
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}
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});
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inStream.pipe(lob); // copies the text to the LOB
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});
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});
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