94 lines
2.9 KiB
JavaScript
94 lines
2.9 KiB
JavaScript
/* Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved. */
|
|
|
|
/******************************************************************************
|
|
*
|
|
* You may not use the identified files except in compliance with the Apache
|
|
* License, Version 2.0 (the "License.")
|
|
*
|
|
* You may obtain a copy of the License at
|
|
* http://www.apache.org/licenses/LICENSE-2.0.
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
*
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
* NAME
|
|
* selectjsonblob.js
|
|
*
|
|
* DESCRIPTION
|
|
* Executes sample insert and query statements using a JSON column with BLOB storage.
|
|
* Requires Oracle Database 12.1.0.2, which has extensive JSON datatype support.
|
|
* See https://www.oracle.com/pls/topic/lookup?ctx=dblatest&id=ADJSN
|
|
*
|
|
* Use demo.sql to create the required table.
|
|
*
|
|
* This example requires node-oracledb 1.13 or later.
|
|
*
|
|
* This example uses Node 8's async/await syntax.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
const oracledb = require('oracledb');
|
|
const dbConfig = require('./dbconfig.js');
|
|
|
|
async function run() {
|
|
|
|
let connection;
|
|
|
|
try {
|
|
let result;
|
|
|
|
connection = await oracledb.getConnection(dbConfig);
|
|
|
|
if (connection.oracleServerVersion < 1201000200) {
|
|
throw new Error('This example only works with Oracle Database 12.1.0.2 or greater');
|
|
}
|
|
|
|
console.log('Inserting Data');
|
|
const data = { "userId": 2, "userName": "Bob", "location": "USA" };
|
|
const s = JSON.stringify(data);
|
|
const b = Buffer.from(s, 'utf8');
|
|
await connection.execute(
|
|
`INSERT INTO j_purchaseorder_b (po_document) VALUES (:lobbv)`,
|
|
{ lobbv: b });
|
|
|
|
console.log('Selecting JSON stored in a BLOB column:');
|
|
result = await connection.execute(
|
|
`SELECT po_document
|
|
FROM j_purchaseorder_b
|
|
WHERE JSON_EXISTS (po_document, '$.location')`,
|
|
[],
|
|
{ fetchInfo: { "PO_DOCUMENT": { type: oracledb.BUFFER } } }); // Fetch as a Buffer instead of a Stream
|
|
if (result.rows.length === 0)
|
|
throw new Error('No results');
|
|
console.log(result.rows[0][0].toString('utf8'));
|
|
|
|
console.log('Selecting a JSON value using "dotted" notation:');
|
|
if (connection.oracleServerVersion < 1202000000) {
|
|
throw new Error('This example only works with Oracle Database 12.2 or greater');
|
|
}
|
|
result = await connection.execute(
|
|
`SELECT pob.po_document.location
|
|
FROM j_purchaseorder_b pob`);
|
|
if (result.rows.length === 0)
|
|
throw new Error('No results');
|
|
console.log(result.rows[0][0]);
|
|
|
|
} catch (err) {
|
|
console.error(err);
|
|
} finally {
|
|
if (connection) {
|
|
try {
|
|
await connection.close();
|
|
} catch (err) {
|
|
console.error(err);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
run();
|