118 lines
3.2 KiB
JavaScript
118 lines
3.2 KiB
JavaScript
/* Copyright (c) 2015, 2021, 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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* refcursor.js
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*
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* DESCRIPTION
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* Shows using a ResultSet to fetch rows from a REF CURSOR using getRows().
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* Streaming is also possible (this is not shown).
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*
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* This example uses Node 8's async/await syntax.
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*
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*****************************************************************************/
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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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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.setupBf(connection); // create the demo table
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//
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// Create a PL/SQL procedure
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//
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await connection.execute(
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`CREATE OR REPLACE PROCEDURE no_get_rs (p_id IN NUMBER, p_recordset OUT SYS_REFCURSOR)
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AS
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BEGIN
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OPEN p_recordset FOR
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SELECT farmer, weight, ripeness
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FROM no_banana_farmer
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WHERE id < p_id;
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END;`
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);
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//
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// Get a REF CURSOR result set
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//
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const result = await connection.execute(
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`BEGIN
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no_get_rs(:id, :cursor);
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END;`,
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{
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id: 3,
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cursor: { type: oracledb.CURSOR, dir: oracledb.BIND_OUT }
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});
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console.log("Cursor metadata:");
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console.log(result.outBinds.cursor.metaData);
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//
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// Fetch rows from the REF CURSOR.
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//
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const resultSet = result.outBinds.cursor;
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const numRows = 10; // number of rows to return from each call to getRows()
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let rows;
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// If getRows(numRows) returns:
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// Zero rows => there were no rows, or are no more rows to return
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// Fewer than numRows rows => this was the last set of rows to get
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// Exactly numRows rows => there may be more rows to fetch
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do {
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rows = await resultSet.getRows(numRows); // get numRows rows at a time
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if (rows.length > 0) {
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console.log("getRows(): Got " + rows.length + " rows");
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console.log(rows);
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}
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} while (rows.length === numRows);
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// From node-oracledb 5.2, you can alternatively fetch all rows in one call.
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// This is useful when the ResultSet is known to contain a small number of
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// rows that will always fit in memory.
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//
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// rows = await resultSet.getRows(); // no parameter means get all rows
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// console.log(rows);
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// always close the ResultSet
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await resultSet.close();
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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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