node-firebird-data

Pure JavaScript Firebird client for Node.js.

Pure JavaScript and Asynchronous Firebird client for Node.js. Firebird forum on Google Groups.

Firebird database on social networks

• Firebird on Google+
• Firebird on Twitter
• Firebird on Facebook

Changelog for version v0.9.x

• Better blob management (warning API Breaking Changes)
• Much unit-test
• Better sequentially select (warning API Breaking Changes)
• Added transation.sequentially
• Bugs correction

---

Changelog for version v0.2.x

• added auto-reconnect
• added sequentially selects
• events for connection (attach, detach, row, result, transaction, commit, rollback, error, etc.)
• performance improvements
• supports inserting/updating buffers and streams
• reading blobs (sequentially)
• pooling
• database.detach() waits for last command
• better unit-test
• best of use with total.js - web application framework for node.js

---

• Firebird documentation
• Firebird limits and data types

Installation

npm install node-firebird-data

Usage

var Firebird = require('node-firebird-data');

Methods

• Firebird.escape(value) -> return {String} - prevent for SQL Injections
• Firebird.attach(options, function(err, db)) attach a database
• Firebird.create(options, function(err, db)) create a database
• Firebird.attachOrCreate(options, function(err, db)) attach or create database
• Firebird.pool(max, options, function(err, db)) -> return {Object} create a connection pooling

Connection types

Connection options

var options = {};
 
options.host = '127.0.0.1';
options.port = 3050;
options.database = 'database.fdb';
options.user = 'SYSDBA';
options.password = 'masterkey';
options.lowercase_keys = false; // set to true to lowercase keys
options.role = null;            // default
options.pageSize = 4096;        // default when creating database
 

Classic

Firebird.attach(options, function(err, db) {
 
    if (err)
        throw err;
 
    // db = DATABASE
    db.query('SELECT * FROM TABLE', function(err, result) {
        // IMPORTANT: close the connection
        db.detach();
    });
 
});

Pooling

// 5 = the number is count of opened sockets
var pool = Firebird.pool(5, options);
 
// Get a free pool
pool.get(function(err, db) {
 
    if (err)
        throw err;
 
    // db = DATABASE
    db.query('SELECT * FROM TABLE', function(err, result) {
        // IMPORTANT: release the pool connection
        db.detach();
    });
});
 
// Destroy pool
pool.destroy();

Database object (db)

Methods

• db.query(query, [params], function(err, result)) - classic query, returns Array of Object
• db.execute(query, [params], function(err, result)) - classic query, returns Array of Array
• db.sequentially(query, [params], function(row, index, next), function(err), asArray) - sequentially query
• db.detach(function(err)) detach a database
• db.transaction(isolation, function(err, transaction)) create transaction

Transaction methods

• transaction.query(query, [params], function(err, result)) - classic query, returns Array of Object
• transaction.execute(query, [params], function(err, result)) - classic query, returns Array of Array
• transaction.sequentially(query, [params], function(row, index, next), function(err), asArray) - sequentially query
• transaction.commit(function(err)) commit current transaction
• transaction.rollback(function(err)) rollback current transaction

Examples

PARAMETRIZED QUERIES

Parameters

Firebird.attach(options, function(err, db) {
 
    if (err)
        throw err;
 
    // db = DATABASE
    db.query('INSERT INTO USERS (ID, ALIAS, CREATED) VALUES(?, ?, ?) RETURNING ID', [1, 'Pe\'ter', new Date()] function(err, result) {
        console.log(result[0].id);
        db.query('SELECT * FROM USERS WHERE Alias=?', ['Peter'], function(err, result) {
            console.log(result);
            db.detach();
        });
    });
});

BLOB (stream)

Firebird.attach(options, function(err, db) {
 
    if (err)
        throw err;
 
    // db = DATABASE
    // INSERT STREAM as BLOB
    db.query('INSERT INTO USERS (ID, ALIAS, FILE) VALUES(?, ?, ?)', [1, 'Peter', fs.createReadStream('/users/image.jpg')] function(err, result) {
        // IMPORTANT: close the connection
        db.detach();
    });
});

BLOB (buffer)

Firebird.attach(options, function(err, db) {
 
    if (err)
        throw err;
 
    // db = DATABASE
    // INSERT BUFFER as BLOB
    db.query('INSERT INTO USERS (ID, ALIAS, FILE) VALUES(?, ?, ?)', [1, 'Peter', fs.readFileSync('/users/image.jpg')] function(err, result) {
        // IMPORTANT: close the connection
        db.detach();
    });
});

READING BLOBS (ASYNCHRONOUS)

// async (only with transaction)
Firebird.attach(options, function(err, db) {
 
    if (err)
        throw err;
    db.transaction(function(err, transaction) {    
        // db = DATABASE
        db.query('SELECT ID, ALIAS, USERPICTURE FROM USER', function(err, rows) {
 
            if (err)
                throw err;
 
            // first row
            rows[0].userpicture(function(err, name, e) {
 
                if (err)
                    throw err;
 
                // +v0.2.4
                // e.pipe(writeStream/Response);
 
                // e === EventEmitter
                e.on('data', function(chunk) {
                    // reading data
                });
 
                e.on('end', function() {
                    // end reading
                    // IMPORTANT: close the connection
                    db.detach();
                });
            });
        });
    });
});
 
// sync blob are fetched automatically
Firebird.attach(options, function(err, db) {
 
    if (err)
        throw err;
 
    // db = DATABASE
    db.query('SELECT ID, ALIAS, USERPICTURE FROM USER', function(err, rows) {
 
        if (err)
            throw err;
 
        // first row
        // userpicture is a Buffer that contain the blob data
        rows[0].userpicture;
    });
});

STREAMING A BIG DATA

Firebird.attach(options, function(err, db) {
 
    if (err)
        throw err;
 
    // db = DATABASE
    db.sequentially('SELECT * FROM BIGTABLE', function(row, index, next) {
 
        // EXAMPLE
        stream.write(JSON.stringify(row));
        next()
    }, function(err) {
        // END
        // IMPORTANT: close the connection
        db.detach();
    });
});

TRANSACTIONS

Transaction types:

• Firebird.ISOLATION_READ_UNCOMMITTED
• Firebird.ISOLATION_READ_COMMITED
• Firebird.ISOLATION_REPEATABLE_READ
• Firebird.ISOLATION_SERIALIZABLE
• Firebird.ISOLATION_READ_COMMITED_READ_ONLY

Firebird.attach(options, function(err, db) {
 
    if (err)
        throw err;
 
    // db = DATABASE
    db.transaction(Firebird.ISOLATION_READ_COMMITED, function(err, transaction) {
        transaction.query('INSERT INTO users VALUE(?,?)', [1, 'Janko'], function(err, result) {
 
            if (err) {
                transaction.rollback();
                return;
            }
 
            transaction.commit(function(err) {
                if (err)
                    transaction.rollback();
                else
                    db.detach();
            });
        });
    });
});

EVENTS

Firebird.attach(options, function(err, db) {
 
    if (err)
        throw err;
 
    db.on('row', function(row, index, isObject) {
        // index === Number
        // isObject === is row object or array?
    });
 
    db.on('result', function(result) {
        // result === Array
    });
 
    db.on('attach', function() {
 
    });
 
    db.on('detach', function(isPoolConnection) {
        // isPoolConnection == Boolean
    });
 
    db.on('reconnect', function() {
 
    });
 
    db.on('error', function(err) {
 
    });
 
    db.on('transaction', function(isolation) {
        // isolation === Number
    });
 
    db.on('commit', function() {
 
    });
 
    db.on('rollback', function() {
 
    });
 
    db.detach();
});

Escaping query values

var sql1 = 'SELECT * FROM TBL_USER WHERE ID>' + Firebird.escape(1);
var sql2 = 'SELECT * FROM TBL_USER WHERE NAME=' + Firebird.escape('Pe\'er');
var sql3 = 'SELECT * FROM TBL_USER WHERE CREATED<=' + Firebird.escape(new Date());
var sql4 = 'SELECT * FROM TBL_USER WHERE NEWSLETTER=' + Firebird.escape(true);
 
// or db.escape()
 
console.log(sql1);
console.log(sql2);
console.log(sql3);
console.log(sql4);

Service Manager functions

• backup
• restore
• fixproperties
• serverinfo
• database validation
• commit transaction
• rollback transaction
• recover transaction
• database stats
• users infos
• user actions (add modify remove)
• get firebird file log
• tracing

// each row : fctname : [params], typeofreturn
var fbsvc = {
    "backup" : { [ "options"], "stream" },
    "nbackup" : { [ "options"], "stream" },
    "restore" : { [ "options"], "stream" },
    "nrestore" : { [ "options"], "stream" },
    "setDialect": { [ "database","dialect"], "stream" },
    "setSweepinterval": { [ "database","sweepinterval"], "stream" },
    "setCachebuffer" : { [ "database","nbpagebuffers"], "stream" },
    "BringOnline" : { [ "database"], "stream" },
    "Shutdown" : { [ "database","shutdown","shutdowndelay","shutdownmode"], "stream" },
    "setShadow" : { [ "database","activateshadow"], "stream" },
    "setForcewrite" : { [ "database","forcewrite"], "stream" },
    "setReservespace" : { [ "database","reservespace"], "stream" },
    "setReadonlyMode" : { [ "database"], "stream" },
    "setReadwriteMode" : { [ "database"], "stream" },
    "validate" : { [ "options"], "stream" },
    "commit" : { [ "database", "transactid"], "stream" },
    "rollback" : { [ "database", "transactid"], "stream" },
    "recover" : { [ "database", "transactid"], "stream" },
    "getStats" : { [ "options"], "stream" },
    "getLog" : { [ "options"], "stream" },
    "getUsers" : { [ "username"], "object" },
    "addUser" : { [ "username", "password", "options"], "stream" },
    "editUser" : { [ "username", "options"], "stream" },
    "removeUser" : { [ "username","rolename"], "stream" },
    "getFbserverInfos" : { [ "options", "options"], "object" },
    "startTrace" : { [ "options"], "stream" },
    "suspendTrace" : { [ "options"], "stream" },
    "resumeTrace" : { [ "options"], "stream" },
    "stopTrace" : { [ "options"], "stream" },
    "getTraceList" : { [ "options"], "stream" },
    "hasActionRunning" : { [ "options"], "object"}
}
 

Backup Service example

 
Firebird.attach(options, function(err, svc) {
    if (err)
        return;
    svc.backup(
        {
            database:'/DB/MYDB.FDB',
            files: [
                    {
                     filename:'/DB/MYDB.FBK',
                     sizefile:'0'
                    }
                   ]
        },
        function(err, data) {
            console.log(data);
        });

getLog and getFbserverInfos Service examples with use of stream and object return

fb.attach(_connection, function(err, svc) {
    if (err)
        return;
    // all function that return a stream take two optional parameter
    // optread => byline or buffer  byline use isc_info_svc_line and buffer use isc_info_svc_to_eof
    // buffersize => is the buffer for service manager it can't exceed 8ko (i'm not sure)

    svc.getLog({optread:'buffer', buffersize:2048}, function (err, data) {
            // data is a readablestream that contain the firebird.log file
            console.log(err);
            data.on('data', function (data) {
                console.log(data.toString());
            });
            data.on('end', function() {
                console.log('finish');
            });
        });

    // an other exemple to use function that return object
    svc.getFbserverInfos(
            {
            "dbinfo" : true,
            "fbconfig" : true,
            "svcversion" : true,
            "fbversion" : true,
            "fbimplementation" : true,
            "fbcapatibilities" : true,
            "pathsecuritydb" : true,
            "fbenv" : true,
            "fbenvlock" : true,
            "fbenvmsg" : true
        }, {}, function (err, data) {
            console.log(err);
            console.log(data);
        });
});

Charset for database connection is always UTF-8

node-firebird doesn't let you chose the charset connection, it will always use UTF8. Node is unicode, no matter if your database is using another charset to store string or blob, Firebird will transliterate automatically.

This is why you should use Firebird 2.5 server at least.

Firebird 3.0 Support

Firebird new wire protocol is not supported yet so for Firebird 3.0 you need to add the following in firebird.conf

AuthServer = Legacy_Auth
WireCrypt = Disabled

Contributors

• Henri Gourvest, https://github.com/hgourvest
• Popa Marius Adrian, https://github.com/mariuz
• Peter Širka, https://github.com/petersirka
• Arnaud Le Roy https://github.com/sdnetwork