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insert2.js
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168 lines (156 loc) · 4.39 KB
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/* Copyright (c) 2015, 2018, 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
* insert2.js
*
* DESCRIPTION
* Show the auto commit behavior.
*
* By default, node-oracledb does not commit on execute.
* The driver also has commit() and rollback() methods to explicitly control transactions.
*
* Note: regardless of the auto commit mode, any open transaction
* will be rolled back when a connection is closed.
*
*****************************************************************************/
var async = require('async');
var oracledb = require('oracledb');
var dbConfig = require('./dbconfig.js');
var doconnect = function(cb) {
oracledb.getConnection(
{
user : dbConfig.user,
password : dbConfig.password,
connectString : dbConfig.connectString
},
cb);
};
var dorelease = function(conn) {
conn.close(function (err) {
if (err)
console.error(err.message);
});
};
var dodrop = function (conn, cb) {
conn.execute(
`BEGIN
EXECUTE IMMEDIATE 'DROP TABLE test';
EXCEPTION WHEN OTHERS THEN
IF SQLCODE <> -942 THEN
RAISE;
END IF;
END;`,
function(err) {
if (err) {
return cb(err, conn);
} else {
console.log("Table dropped");
return cb(null, conn);
}
});
};
var docreate = function (conn, cb) {
conn.execute(
"CREATE TABLE test (id NUMBER, name VARCHAR2(20))",
function(err) {
if (err) {
return cb(err, conn);
} else {
console.log("Table created");
return cb(null, conn);
}
});
};
// Insert with autoCommit enabled
var doinsert_autocommit = function (conn, cb) {
conn.execute(
"INSERT INTO test VALUES (:id, :nm)",
[1, 'Chris'], // Bind values
{ autoCommit: true}, // Override the default non-autocommit behavior
function(err, result) {
if (err) {
return cb(err, conn);
} else {
console.log("Rows inserted: " + result.rowsAffected); // 1
return cb(null, conn);
}
});
};
// Insert without committing
var doinsert_nocommit = function (conn, cb) {
conn.execute(
"INSERT INTO test VALUES (:id, :nm)",
[2, 'Alison'], // Bind values
// { autoCommit: true}, // Since this isn't set, operations using a second connection won't see this row
function(err, result) {
if (err) {
return cb(err, conn);
} else {
console.log("Rows inserted: " + result.rowsAffected); // 1
return cb(null, conn);
}
});
};
// Query on a second connection
var doquery = function (conn, cb) {
oracledb.getConnection(
{
user : dbConfig.user,
password : dbConfig.password,
connectString : dbConfig.connectString
},
function(err, connection2) {
if (err) {
console.error(err.message);
return cb(err, conn);
}
connection2.execute(
"SELECT * FROM test",
function(err, result) {
if (err) {
console.error(err.message);
return cb(err, conn);
}
// This will only show 'Chris' because inserting 'Alison' is not commited by default.
// Uncomment the autoCommit option above and you will see both rows
console.log(result.rows);
connection2.close(
function(err) {
if (err) {
console.error(err.message);
return cb(err, conn);
} else
return cb(null, conn);
});
});
});
};
async.waterfall(
[
doconnect,
dodrop,
docreate,
doinsert_autocommit,
doinsert_nocommit,
doquery,
dodrop
],
function (err, conn) {
if (err) { console.error("In waterfall error cb: ==>", err, "<=="); }
if (conn)
dorelease(conn);
});