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Add DBMS_OUTPUT examples
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‎examples/dbmsoutputgetline.js

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/* Copyright (c) 2015, 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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* dbmsoutputgetline.js
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*
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* DESCRIPTION
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* Displays PL/SQL DBMS_OUTPUT in node-oracledb, fetching one record at a time.
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*
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*****************************************************************************/
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var async = require('async');
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var oracledb = require('oracledb');
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var dbConfig = require('./dbconfig.js');
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oracledb.createPool(
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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, pool) {
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if (err)
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console.error(err.message);
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else
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doit(pool);
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});
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var doit = function(pool) {
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async.waterfall(
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[
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function(cb) {
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pool.getConnection(cb);
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},
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enableDbmsOutput,
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createDbmsOutput,
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fetchDbmsOutputLine
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],
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function (err, conn) {
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if (err) { console.error("In waterfall error cb: ==>", err, "<=="); }
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conn.release(function (err) { if (err) console.error(err.message); });
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}
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);
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};
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var enableDbmsOutput = function (conn, cb) {
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conn.execute(
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"BEGIN DBMS_OUTPUT.ENABLE(NULL); END;",
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function(err) { return cb(err, conn); });
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};
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var createDbmsOutput = function (conn, cb) {
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conn.execute(
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"BEGIN " +
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"DBMS_OUTPUT.PUT_LINE('Hello, Oracle!')`;" +
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"DBMS_OUTPUT.PUT_LINE('Hello, Node!');" +
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"END;",
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function(err) { return cb(err, conn); });
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};
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var fetchDbmsOutputLine = function (conn, cb) {
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conn.execute(
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"BEGIN DBMS_OUTPUT.GET_LINE(:ln, :st); END;",
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{ ln: { dir: oracledb.BIND_OUT, type: oracledb.STRING, maxSize: 32767 },
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st: { dir: oracledb.BIND_OUT, type: oracledb.NUMBER } },
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function(err, result) {
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if (err) {
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return cb(err, conn);
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} else if (result.outBinds.st == 1) {
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return cb(null, conn); // no more output
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} else {
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console.log(result.outBinds.ln);
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return fetchDbmsOutputLine(conn, cb);
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}
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});
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};

‎examples/dbmsoutputpipe.js

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/* Copyright (c) 2015, 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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* dbmsoutputpipe.js
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*
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* DESCRIPTION
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* Displays PL/SQL DBMS_OUTPUT using a pipelined table.
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* Use demo.sql to create the dependencies or do:
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*
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* CREATE OR REPLACE TYPE dorow AS TABLE OF VARCHAR2(32767);
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* /
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* SHOW ERRORS
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*
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* CREATE OR REPLACE FUNCTION mydofetch RETURN dorow PIPELINED IS
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* line VARCHAR2(32767);
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* status INTEGER;
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* BEGIN LOOP
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* DBMS_OUTPUT.GET_LINE(line, status);
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* EXIT WHEN status = 1;
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* PIPE ROW (line);
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* END LOOP;
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* END;
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* /
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* SHOW ERRORS
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*
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*****************************************************************************/
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var async = require('async');
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var oracledb = require('oracledb');
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var dbConfig = require('./dbconfig.js');
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var numRows = 100; // fetch this many records at a time
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oracledb.createPool(
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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, pool) {
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if (err)
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console.error(err.message);
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else
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doit(pool);
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});
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var doit = function(pool) {
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async.waterfall(
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[
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function(cb) {
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pool.getConnection(cb);
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},
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enableDbmsOutput,
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createDbmsOutput,
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fetchDbmsOutput,
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printDbmsOutput
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],
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function (err, conn) {
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if (err) { console.error("In waterfall error cb: ==>", err, "<=="); }
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conn.release(function (err) { if (err) console.error(err.message); });
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});
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};
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var enableDbmsOutput = function (conn, cb) {
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conn.execute(
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"BEGIN DBMS_OUTPUT.ENABLE(NULL); END;",
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function(err) { return cb(err, conn); });
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};
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var createDbmsOutput = function (conn, cb) {
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conn.execute(
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"BEGIN " +
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"DBMS_OUTPUT.PUT_LINE('Hello, Oracle!');" +
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"DBMS_OUTPUT.PUT_LINE('Hello, Node!');" +
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"END;",
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function(err) { return cb(err, conn); });
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};
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var fetchDbmsOutput = function (conn, cb) {
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conn.execute(
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"SELECT * FROM TABLE(mydofetch())",
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[],
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{ resultSet: true },
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function (err, result) {
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if (err)
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return cb(err, conn);
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else
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return cb(null, conn, result);
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});
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};
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var printDbmsOutput = function(conn, result, cb) {
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if (result.resultSet) {
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return fetchRowsFromRS(conn, result.resultSet, numRows, cb);
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} else {
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console.log("No results");
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return cb(null, conn);
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}
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};
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var fetchRowsFromRS = function(conn, resultSet, numRows, cb) {
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resultSet.getRows(
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numRows,
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function (err, rows) {
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if (err) {
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return cb(err, conn);
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} else if (rows.length > 0) {
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console.log(rows);
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return fetchRowsFromRS(conn, resultSet, numRows, cb);
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} else {
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return cb(null, conn);
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}
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});
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};

‎examples/demo.sql

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-- For LOB examples
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DROP TABLE mylobs;
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CREATE TABLE mylobs (id NUMBER, c CLOB, b BLOB);
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-- For DBMS_OUTPUT example dbmsoutputpipe.js
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CREATE OR REPLACE TYPE dorow AS TABLE OF VARCHAR2(32767);
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/
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SHOW ERRORS
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CREATE OR REPLACE FUNCTION mydofetch RETURN dorow PIPELINED IS
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line VARCHAR2(32767);
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status INTEGER;
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BEGIN LOOP
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DBMS_OUTPUT.GET_LINE(line, status);
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EXIT WHEN status = 1;
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PIPE ROW (line);
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END LOOP;
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END;
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/
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SHOW ERRORS

‎examples/demodrop.sql

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DROP TABLE dmlrupdtab;
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DROP TABLE mylobs;
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DROP TYPE dorow;
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DROP FUNCTION mydofetch;

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