87 lines
2.6 KiB
JavaScript
87 lines
2.6 KiB
JavaScript
/* Copyright (c) 2015, 2016, 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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* clobstream1.js
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*
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* DESCRIPTION
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* SELECTs a CLOB and pipes it to a file, clobstream1out.txt
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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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* Run clobinsert1.js to load text before running this example.
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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 outFileName = 'clobstream1out.txt';
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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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{
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if (err) { console.error(err.message); return; }
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connection.execute(
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"SELECT c FROM mylobs WHERE id = :id",
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{ id: 1 },
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function(err, result)
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{
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if (err) { console.error(err.message); return; }
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if (result.rows.length === 0) { console.log("No results"); return; }
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var lob = result.rows[0][0];
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if (lob === null) { console.log("CLOB was NULL"); return; }
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lob.setEncoding('utf8'); // set the encoding so we get a 'string' not a 'buffer'
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lob.on(
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'error',
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function(err)
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{
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console.log("lob.on 'error' event");
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console.error(err);
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});
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lob.on(
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'close',
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function()
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{
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console.log("lob.on 'close' event");
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connection.release(function(err) {
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if (err) console.error(err.message);
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});
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});
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console.log('Writing to ' + outFileName);
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var outStream = fs.createWriteStream(outFileName);
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outStream.on(
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'error',
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function(err)
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{
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console.log("outStream.on 'error' event");
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console.error(err);
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});
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lob.pipe(outStream);
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});
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});
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