91 lines
2.9 KiB
JavaScript
91 lines
2.9 KiB
JavaScript
/* Copyright (c) 2015, 2018, 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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* select1.js
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*
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* DESCRIPTION
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* Executes a basic query without using a connection pool or ResultSet.
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* Uses Oracle's sample HR schema.
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*
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* Scripts to create the HR schema can be found at:
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* https://github.com/oracle/db-sample-schemas
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*
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* For a connection pool example see webapp.js
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* For a ResultSet example see resultset2.js
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* For a query stream example see selectstream.js
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* For a Promise example see promises.js
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*
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*****************************************************************************/
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var oracledb = require('oracledb');
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var dbConfig = require('./dbconfig.js');
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// Get a non-pooled connection
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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) {
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console.error(err.message);
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return;
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}
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connection.execute(
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// The statement to execute
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`SELECT department_id, department_name
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FROM departments
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WHERE department_id = :id`,
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// The "bind value" 180 for the bind variable ":id"
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[180],
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// execute() options argument. Since the query only returns one
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// row, we can optimize memory usage by reducing the default
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// maxRows value. For the complete list of other options see
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// the documentation.
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{ maxRows: 1
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//, outFormat: oracledb.OBJECT // query result format
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//, extendedMetaData: true // get extra metadata
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//, fetchArraySize: 100 // internal buffer allocation size for tuning
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},
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// The callback function handles the SQL execution results
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function(err, result) {
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if (err) {
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console.error(err.message);
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doRelease(connection);
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return;
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}
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console.log(result.metaData); // [ { name: 'DEPARTMENT_ID' }, { name: 'DEPARTMENT_NAME' } ]
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console.log(result.rows); // [ [ 180, 'Construction' ] ]
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doRelease(connection);
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});
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});
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// Note: connections should always be released when not needed
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function doRelease(connection) {
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connection.close(
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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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