125 lines
4.4 KiB
JavaScript
125 lines
4.4 KiB
JavaScript
/* Copyright (c) 2015, 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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* lobinsert1.js
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*
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* DESCRIPTION
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* Reads text from clobexample.txt and INSERTs it into a CLOB column.
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* Reads binary data from fuzzydinosaur.jpg and INSERTs it into a BLOB column.
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* After running this, Run lobselect.js to query the inserted data.
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*
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* "Small" amounts of data can be bound directly for INSERT into LOB
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* columns. Larger amounts should be streamed, see lobinssert2.js.
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* The boundary between 'small' and 'large' depends on how Node.js
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* and V8 handle large data in memory, and on your streaming and
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* performance requirements.
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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 fs = require('fs');
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const oracledb = require('oracledb');
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const dbConfig = require('./dbconfig.js');
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const demoSetup = require('./demosetup.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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oracledb.autoCommit = true; // for ease of demonstration only
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const clobInFileName = 'clobexample.txt'; // the file with text to be inserted into the database
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const blobInFileName = 'fuzzydinosaur.jpg'; // contains the image 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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await demoSetup.setupLobs(connection, false); // create the demo table without data
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let result;
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// Insert a CLOB
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const str = fs.readFileSync(clobInFileName, 'utf8');
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result = await connection.execute(
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`INSERT INTO no_lobs (id, c) VALUES (:id, :c)`,
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{ id: 1, c: str }
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);
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if (result.rowsAffected != 1)
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throw new Error('CLOB was not inserted');
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else
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console.log('CLOB inserted from ' + clobInFileName);
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// Insert a BLOB
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const buf = fs.readFileSync(blobInFileName);
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result = await connection.execute(
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`INSERT INTO no_lobs (id, b) VALUES (:id, :b)`,
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{ id: 2, b: buf },
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);
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if (result.rowsAffected != 1)
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throw new Error('BLOB was not inserted');
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else
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console.log('BLOB inserted from ' + blobInFileName);
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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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