node-mssql

Microsoft SQL Server client for Node.js (Based on https://github.com/tediousjs/node-mssql - @patriksimek)

Supported TDS drivers:

• Tedious (pure JavaScript - Windows/macOS/Linux, default)
• Microsoft / Contributors Node V8 Driver for Node.js for SQL Server (native - Windows only)

Installation

npm install mssql-plus

Use @next tag to install the most recent version with latest fixes and features.

npm install mssql-plus@next

Quick Example

const sql = require('mssql-plus')
 
async () => {
    try {
        await sql.connect('mssql://username:password@localhost/database')
        const result = await sql.query`select * from mytable where id = ${value}`
        console.dir(result)
    } catch (err) {
        // ... error checks
    }
}

If you're on Windows Azure, add ?encrypt=true to your connection string. See docs to learn more.

Documentation

Examples

• Async/Await
• Promises
• ES6 Tagged template literals
• Callbacks
• Streaming
• Connection Pools

Configuration

• General
• Formats

Drivers

• Tedious
• Microsoft / Contributors Node V8 Driver for Node.js for SQL Server

Connections

• ConnectionPool
• connect
• close

Requests

• Request
• execute
• input
• output
• pipe
• query
• batch
• bulk
• cancel

Transactions

• Transaction
• begin
• commit
• rollback

Prepared Statements

• PreparedStatement
• input
• output
• prepare
• execute
• unprepare

Other

• CLI
• Geography and Geometry
• Table-Valued Parameter
• Affected Rows
• JSON support
• Errors
• Informational messages
• Metadata
• Data Types
• SQL injection
• Known Issues
• Contributing
• 3.x to 4.x changes
• 3.x Documentation

Examples

Config

const config = {
    user: '...',
    password: '...',
    server: 'localhost', // You can use 'localhost\\instance' to connect to named instance
    database: '...',
 
    options: {
        encrypt: true // Use this if you're on Windows Azure
    }
}

Async/Await

const sql = require('mssql-plus')
 
(async function () {
    try {
        let pool = await sql.connect(config)
        let result1 = await pool.request()
            .input('input_parameter', sql.Int, value)
            .query('select * from mytable where id = @input_parameter')
            
        console.dir(result1)
    
        // Stored procedure
        
        let result2 = await pool.request()
            .input('input_parameter', sql.Int, value)
            .output('output_parameter', sql.VarChar(50))
            .execute('procedure_name')
        
        console.dir(result2)
    } catch (err) {
        // ... error checks
    }
})()
 
sql.on('error', err => {
    // ... error handler
})

Promises

const sql = require('mssql-plus')
 
sql.connect(config).then(pool => {
    // Query
    
    return pool.request()
    .input('input_parameter', sql.Int, value)
    .query('select * from mytable where id = @input_parameter')
}).then(result => {
    console.dir(result)
    
    // Stored procedure
    
    return pool.request()
    .input('input_parameter', sql.Int, value)
    .output('output_parameter', sql.VarChar(50))
    .execute('procedure_name')
}).then(result => {
    console.dir(result)
}).catch(err => {
    // ... error checks
})
 
sql.on('error', err => {
    // ... error handler
})

Native Promise is used by default. You can easily change this with sql.Promise = require('myownpromisepackage').

ES6 Tagged template literals

const sql = require('mssql-plus')
 
sql.connect(config).then(() => {
    return sql.query`select * from mytable where id = ${value}`
}).then(result => {
    console.dir(result)
}).catch(err => {
    // ... error checks
})
 
sql.on('error', err => {
    // ... error handler
})

All values are automatically sanitized against sql injection.

Callbacks

const sql = require('mssql-plus')
 
sql.connect(config, err => {
    // ... error checks
 
    // Query
 
    new sql.Request().query('select 1 as number', (err, result) => {
        // ... error checks
 
        console.dir(result)
    })
 
    // Stored Procedure
 
    new sql.Request()
    .input('input_parameter', sql.Int, value)
    .output('output_parameter', sql.VarChar(50))
    .execute('procedure_name', (err, result) => {
        // ... error checks
 
        console.dir(result)
    })
})
 
sql.on('error', err => {
    // ... error handler
})

Streaming

If you plan to work with large amount of rows, you should always use streaming. Once you enable this, you must listen for events to receive data.

const sql = require('mssql-plus')
 
sql.connect(config, err => {
    // ... error checks
 
    const request = new sql.Request()
    request.stream = true // You can set streaming differently for each request
    request.query('select * from verylargetable') // or request.execute(procedure)
 
    request.on('recordset', columns => {
        // Emitted once for each recordset in a query
    })
 
    request.on('row', row => {
        // Emitted for each row in a recordset
    })
 
    request.on('error', err => {
        // May be emitted multiple times
    })
 
    request.on('done', result => {
        // Always emitted as the last one
    })
})
 
sql.on('error', err => {
    // ... error handler
})

Connection Pools

const sql = require('mssql-plus')
 
const pool1 = new sql.ConnectionPool(config, err => {
    // ... error checks
 
    // Query
 
    pool1.request() // or: new sql.Request(pool1)
    .query('select 1 as number', (err, result) => {
        // ... error checks
 
        console.dir(result)
    })
 
})
 
pool1.on('error', err => {
    // ... error handler
})
 
const pool2 = new sql.ConnectionPool(config, err => {
    // ... error checks
 
    // Stored Procedure
 
    pool2.request() // or: new sql.Request(pool2)
    .input('input_parameter', sql.Int, 10)
    .output('output_parameter', sql.VarChar(50))
    .execute('procedure_name', (err, result) => {
        // ... error checks
 
        console.dir(result)
    })
})
 
pool2.on('error', err => {
    // ... error handler
})

ES6 Tagged template literals

new sql.ConnectionPool(config).connect().then(pool => {
    return pool.query`select * from mytable where id = ${value}`
}).then(result => {
    console.dir(result)
}).catch(err => {
    // ... error checks
})

All values are automatically sanitized against sql injection.

Configuration

const config = {
    user: '...',
    password: '...',
    server: 'localhost',
    database: '...',
    pool: {
        max: 10,
        min: 0,
        idleTimeoutMillis: 30000
    }
}

General (same for all drivers)

• user - User name to use for authentication.
• password - Password to use for authentication.
• server - Server to connect to. You can use 'localhost\instance' to connect to named instance.
• port - Port to connect to (default: 1433). Don't set when connecting to named instance.
• domain - Once you set domain, driver will connect to SQL Server using domain login.
• database - Database to connect to (default: dependent on server configuration).
• connectionTimeout - Connection timeout in ms (default: 15000).
• requestTimeout - Request timeout in ms (default: 15000). NOTE: msnodesqlv8 driver doesn't support timeouts < 1 second.
• stream - Stream recordsets/rows instead of returning them all at once as an argument of callback (default: false). You can also enable streaming for each request independently (request.stream = true). Always set to true if you plan to work with large amount of rows.
• parseJSON - Parse JSON recordsets to JS objects (default: false). For more information please see section JSON support.
• pool.max - The maximum number of connections there can be in the pool (default: 10).
• pool.min - The minimum of connections there can be in the pool (default: 0).
• pool.idleTimeoutMillis - The Number of milliseconds before closing an unused connection (default: 30000).

Complete list of pool options can be found here.

Formats

In addition to configuration object there is an option to pass config as a connection string. Two formats of connection string are supported.

Classic Connection String

Server=localhost,1433;Database=database;User Id=username;Password=password;Encrypt=true
Driver=msnodesqlv8;Server=(local)\INSTANCE;Database=database;UID=DOMAIN\username;PWD=password;Encrypt=true

Connection String URI

mssql://username:password@localhost:1433/database?encrypt=true
mssql://username:password@localhost/INSTANCE/database?encrypt=true&domain=DOMAIN&driver=msnodesqlv8

Drivers

Tedious

Default driver, actively maintained and production ready. Platform independent, runs everywhere Node.js runs. Officially supported by Microsoft.

Extra options:

• options.instanceName - The instance name to connect to. The SQL Server Browser service must be running on the database server, and UDP port 1434 on the database server must be reachable.
• options.useUTC - A boolean determining whether or not use UTC time for values without time zone offset (default: true).
• options.encrypt - A boolean determining whether or not the connection will be encrypted (default: false).
• options.tdsVersion - The version of TDS to use (default: 7_4, available: 7_1, 7_2, 7_3_A, 7_3_B, 7_4).
• options.appName - Application name used for SQL server logging.
• options.abortTransactionOnError - A boolean determining whether to rollback a transaction automatically if any error is encountered during the given transaction's execution. This sets the value for XACT_ABORT during the initial SQL phase of a connection.

More information about Tedious specific options: http://tediousjs.github.io/tedious/api-connection.html

Microsoft / Contributors Node V8 Driver for Node.js for SQL Server

Requires Node.js 0.12.x or newer. Windows only. This driver is not part of the default package and must be installed separately by npm install msnodesqlv8. To use this driver, use this require syntax: const sql = require('mssql/msnodesqlv8').

Extra options:

• connectionString - Connection string (default: see below).
• options.instanceName - The instance name to connect to. The SQL Server Browser service must be running on the database server, and UDP port 1444 on the database server must be reachable.
• options.trustedConnection - Use Windows Authentication (default: false).
• options.useUTC - A boolean determining whether or not to use UTC time for values without time zone offset (default: true).

Default connection string when connecting to port:

Driver={SQL Server Native Client 11.0};Server={#{server},#{port}};Database={#{database}};Uid={#{user}};Pwd={#{password}};Trusted_Connection={#{trusted}};

Default connection string when connecting to named instance:

Driver={SQL Server Native Client 11.0};Server={#{server}\\#{instance}};Database={#{database}};Uid={#{user}};Pwd={#{password}};Trusted_Connection={#{trusted}};

Connections

Internally, each ConnectionPool instance is a separate pool of TDS connections. Once you create a new Request/Transaction/Prepared Statement, a new TDS connection is acquired from the pool and reserved for desired action. Once the action is complete, connection is released back to the pool. Connection health check is built-in so once the dead connection is discovered, it is immediately replaced with a new one.

IMPORTANT: Always attach an error listener to created connection. Whenever something goes wrong with the connection it will emit an error and if there is no listener it will crash your application with an uncaught error.

const pool = new sql.ConnectionPool({ /* config */ })

Events

• error(err) - Dispatched on connection error.

connect ([callback])

Create a new connection pool. The initial probe connection is created to find out whether the configuration is valid.

Arguments

• callback(err) - A callback which is called after initial probe connection has established, or an error has occurred. Optional. If omitted, returns Promise.

Example

const pool = new sql.ConnectionPool({
    user: '...',
    password: '...',
    server: 'localhost',
    database: '...'
})
 
pool.connect(err => {
    // ...
})

Errors

• ELOGIN (ConnectionError) - Login failed.
• ETIMEOUT (ConnectionError) - Connection timeout.
• EALREADYCONNECTED (ConnectionError) - Database is already connected!
• EALREADYCONNECTING (ConnectionError) - Already connecting to database!
• EINSTLOOKUP (ConnectionError) - Instance lookup failed.
• ESOCKET (ConnectionError) - Socket error.

close()

Close all active connections in the pool.

Example

pool.close()

Request

const request = new sql.Request(/* [pool or transaction] */)

If you omit pool/transaction argument, global pool is used instead.

Events

• recordset(columns) - Dispatched when metadata for new recordset are parsed.
• row(row) - Dispatched when new row is parsed.
• done(returnValue) - Dispatched when request is complete.
• error(err) - Dispatched on error.
• info(message) - Dispatched on informational message.

execute (procedure, [callback])

Call a stored procedure.

Arguments

• procedure - Name of the stored procedure to be executed.
• callback(err, recordsets, returnValue) - A callback which is called after execution has completed, or an error has occurred. returnValue is also accessible as property of recordsets. Optional. If omitted, returns Promise.

Example

const request = new sql.Request()
request.input('input_parameter', sql.Int, value)
request.output('output_parameter', sql.Int)
request.execute('procedure_name', (err, result) => {
    // ... error checks
 
    console.log(result.recordsets.length) // count of recordsets returned by the procedure
    console.log(result.recordsets[0].length) // count of rows contained in first recordset
    console.log(result.recordset) // first recordset from result.recordsets
    console.log(result.returnValue) // procedure return value
    console.log(result.output) // key/value collection of output values
    console.log(result.rowsAffected) // array of numbers, each number represents the number of rows affected by executed statemens
 
    // ...
})

Errors

• EREQUEST (RequestError) - Message from SQL Server
• ECANCEL (RequestError) - Cancelled.
• ETIMEOUT (RequestError) - Request timeout.
• ENOCONN (RequestError) - No connection is specified for that request.
• ENOTOPEN (ConnectionError) - Connection not yet open.
• ECONNCLOSED (ConnectionError) - Connection is closed.
• ENOTBEGUN (TransactionError) - Transaction has not begun.
• EABORT (TransactionError) - Transaction was aborted (by user or because of an error).

input (name, [type], value)

Add an input parameter to the request.

Arguments

• name - Name of the input parameter without @ char.
• type - SQL data type of input parameter. If you omit type, module automatically decide which SQL data type should be used based on JS data type.
• value - Input parameter value. undefined ans NaN values are automatically converted to null values.

Example

request.input('input_parameter', value)
request.input('input_parameter', sql.Int, value)

JS Data Type To SQL Data Type Map

• String -> sql.NVarChar
• Number -> sql.Int
• Boolean -> sql.Bit
• Date -> sql.DateTime
• Buffer -> sql.VarBinary
• sql.Table -> sql.TVP

Default data type for unknown object is sql.NVarChar.

You can define your own type map.

sql.map.register(MyClass, sql.Text)

You can also overwrite the default type map.

sql.map.register(Number, sql.BigInt)

Errors (synchronous)

• EARGS (RequestError) - Invalid number of arguments.
• EINJECT (RequestError) - SQL injection warning.

output (name, type, [value])

Add an output parameter to the request.

Arguments

• name - Name of the output parameter without @ char.
• type - SQL data type of output parameter.
• value - Output parameter value initial value. undefined and NaN values are automatically converted to null values. Optional.

Example

request.output('output_parameter', sql.Int)
request.output('output_parameter', sql.VarChar(50), 'abc')

Errors (synchronous)

• EARGS (RequestError) - Invalid number of arguments.
• EINJECT (RequestError) - SQL injection warning.

pipe (stream)

Sets request to stream mode and pulls all rows from all recordsets to a given stream.

Arguments

• stream - Writable stream in object mode.

Example

const request = new sql.Request()
request.pipe(stream)
request.query('select * from mytable')
stream.on('error', err => {
    // ...
})
stream.on('finish', () => {
    // ...
})

query (command, [callback])

Execute the SQL command. To execute commands like create procedure or if you plan to work with local temporary tables, use batch instead.

Arguments

• command - T-SQL command to be executed.
• callback(err, recordset) - A callback which is called after execution has completed, or an error has occurred. Optional. If omitted, returns Promise.

Example

const request = new sql.Request()
request.query('select 1 as number', (err, result) => {
    // ... error checks
 
    console.log(result.recordset[0].number) // return 1
 
    // ...
})

Errors

• ETIMEOUT (RequestError) - Request timeout.
• EREQUEST (RequestError) - Message from SQL Server
• ECANCEL (RequestError) - Cancelled.
• ENOCONN (RequestError) - No connection is specified for that request.
• ENOTOPEN (ConnectionError) - Connection not yet open.
• ECONNCLOSED (ConnectionError) - Connection is closed.
• ENOTBEGUN (TransactionError) - Transaction has not begun.
• EABORT (TransactionError) - Transaction was aborted (by user or because of an error).

const request = new sql.Request()
request.query('select 1 as number; select 2 as number', (err, result) => {
    // ... error checks
 
    console.log(result.recordset[0].number) // return 1
    console.log(result.recordsets[0][0].number) // return 1
    console.log(result.recordsets[1][0].number) // return 2
})

NOTE: To get number of rows affected by the statement(s), see section Affected Rows.

batch (batch, [callback])

Execute the SQL command. Unlike query, it doesn't use sp_executesql, so is not likely that SQL Server will reuse the execution plan it generates for the SQL. Use this only in special cases, for example when you need to execute commands like create procedure which can't be executed with query or if you're executing statements longer than 4000 chars on SQL Server 2000. Also you should use this if you're plan to work with local temporary tables (more information here).

NOTE: Table-Valued Parameter (TVP) is not supported in batch.

Arguments

• batch - T-SQL command to be executed.
• callback(err, recordset) - A callback which is called after execution has completed, or an error has occurred. Optional. If omitted, returns Promise.

Example

const request = new sql.Request()
request.batch('create procedure #temporary as select * from table', (err, result) => {
    // ... error checks
})

Errors

• ETIMEOUT (RequestError) - Request timeout.
• EREQUEST (RequestError) - Message from SQL Server
• ECANCEL (RequestError) - Cancelled.
• ENOCONN (RequestError) - No connection is specified for that request.
• ENOTOPEN (ConnectionError) - Connection not yet open.
• ECONNCLOSED (ConnectionError) - Connection is closed.
• ENOTBEGUN (TransactionError) - Transaction has not begun.
• EABORT (TransactionError) - Transaction was aborted (by user or because of an error).

You can enable multiple recordsets in queries with the request.multiple = true command.

bulk (table, [callback])

Perform a bulk insert.

Arguments

• table - sql.Table instance.
• callback(err, rowCount) - A callback which is called after bulk insert has completed, or an error has occurred. Optional. If omitted, returns Promise.

Example

const table = new sql.Table('table_name') // or temporary table, e.g. #temptable
table.create = true
table.columns.add('a', sql.Int, {nullable: true, primary: true})
table.columns.add('b', sql.VarChar(50), {nullable: false})
table.rows.add(777, 'test')
 
const request = new sql.Request()
request.bulk(table, (err, result) => {
    // ... error checks
})

IMPORTANT: Always indicate whether the column is nullable or not!

TIP: If you set table.create to true, module will check if the table exists before it start sending data. If it doesn't, it will automatically create it. You can specify primary key columns by setting primary: true to column's options. Primary key constraint on multiple columns is supported.

TIP: You can also create Table variable from any recordset with recordset.toTable(). You can optionally specify table type name in the first argument.

Errors

• ENAME (RequestError) - Table name must be specified for bulk insert.
• ETIMEOUT (RequestError) - Request timeout.
• EREQUEST (RequestError) - Message from SQL Server
• ECANCEL (RequestError) - Cancelled.
• ENOCONN (RequestError) - No connection is specified for that request.
• ENOTOPEN (ConnectionError) - Connection not yet open.
• ECONNCLOSED (ConnectionError) - Connection is closed.
• ENOTBEGUN (TransactionError) - Transaction has not begun.
• EABORT (TransactionError) - Transaction was aborted (by user or because of an error).

cancel()

Cancel currently executing request. Return true if cancellation packet was send successfully.

Example

const request = new sql.Request()
request.query('waitfor delay \'00:00:05\'; select 1 as number', (err, result) => {
    console.log(err instanceof sql.RequestError)  // true
    console.log(err.message)                      // Cancelled.
    console.log(err.code)                         // ECANCEL
 
    // ...
})
 
request.cancel()

Transaction

IMPORTANT: always use Transaction class to create transactions - it ensures that all your requests are executed on one connection. Once you call begin, a single connection is acquired from the connection pool and all subsequent requests (initialized with the Transaction object) are executed exclusively on this connection. After you call commit or rollback, connection is then released back to the connection pool.

const transaction = new sql.Transaction(/* [pool] */)

If you omit connection argument, global connection is used instead.

Example

const transaction = new sql.Transaction(/* [pool] */)
transaction.begin(err => {
    // ... error checks
 
    const request = new sql.Request(transaction)
    request.query('insert into mytable (mycolumn) values (12345)', (err, result) => {
        // ... error checks
 
        transaction.commit(err => {
            // ... error checks
 
            console.log("Transaction committed.")
        })
    })
})

Transaction can also be created by const transaction = pool.transaction(). Requests can also be created by const request = transaction.request().

Aborted transactions

This example shows how you should correctly handle transaction errors when abortTransactionOnError (XACT_ABORT) is enabled. Added in 2.0.

const transaction = new sql.Transaction(/* [pool] */)
transaction.begin(err => {
    // ... error checks
 
    let rolledBack = false
 
    transaction.on('rollback', aborted => {
        // emited with aborted === true
 
        rolledBack = true
    })
 
    new sql.Request(transaction)
    .query('insert into mytable (bitcolumn) values (2)', (err, result) => {
        // insert should fail because of invalid value
 
        if (err) {
            if (!rolledBack) {
                transaction.rollback(err => {
                    // ... error checks
                })
            }
        } else {
            transaction.commit(err => {
                // ... error checks
            })
        }
    })
})

Events

• begin - Dispatched when transaction begin.
• commit - Dispatched on successful commit.
• rollback(aborted) - Dispatched on successful rollback with an argument determining if the transaction was aborted (by user or because of an error).

begin ([isolationLevel], [callback])

Begin a transaction.

Arguments

• isolationLevel - Controls the locking and row versioning behavior of TSQL statements issued by a connection. Optional. READ_COMMITTED by default. For possible values see sql.ISOLATION_LEVEL.
• callback(err) - A callback which is called after transaction has began, or an error has occurred. Optional. If omitted, returns Promise.

Example

const transaction = new sql.Transaction()
transaction.begin(err => {
    // ... error checks
})

Errors

• ENOTOPEN (ConnectionError) - Connection not yet open.
• EALREADYBEGUN (TransactionError) - Transaction has already begun.

commit ([callback])

Commit a transaction.

Arguments

• callback(err) - A callback which is called after transaction has committed, or an error has occurred. Optional. If omitted, returns Promise.

Example

const transaction = new sql.Transaction()
transaction.begin(err => {
    // ... error checks
 
    transaction.commit(err => {
        // ... error checks
    })
})

Errors

• ENOTBEGUN (TransactionError) - Transaction has not begun.
• EREQINPROG (TransactionError) - Can't commit transaction. There is a request in progress.

rollback ([callback])

Rollback a transaction. If the queue isn't empty, all queued requests will be Cancelled and the transaction will be marked as aborted.

Arguments

• callback(err) - A callback which is called after transaction has rolled back, or an error has occurred. Optional. If omitted, returns Promise.

Example

const transaction = new sql.Transaction()
transaction.begin(err => {
    // ... error checks
 
    transaction.rollback(err => {
        // ... error checks
    })
})

Errors

• ENOTBEGUN (TransactionError) - Transaction has not begun.
• EREQINPROG (TransactionError) - Can't rollback transaction. There is a request in progress.

Prepared Statement

IMPORTANT: always use PreparedStatement class to create prepared statements - it ensures that all your executions of prepared statement are executed on one connection. Once you call prepare, a single connection is acquired from the connection pool and all subsequent executions are executed exclusively on this connection. After you call unprepare, the connection is then released back to the connection pool.

const ps = new sql.PreparedStatement(/* [pool] */)

If you omit the connection argument, the global connection is used instead.

Example

const ps = new sql.PreparedStatement(/* [pool] */)
ps.input('param', sql.Int)
ps.prepare('select @param as value', err => {
    // ... error checks
 
    ps.execute({param: 12345}, (err, result) => {
        // ... error checks
 
        ps.unprepare(err => {
            // ... error checks
 
        })
    })
})

IMPORTANT: Remember that each prepared statement means one reserved connection from the pool. Don't forget to unprepare a prepared statement!

TIP: You can also create prepared statements in transactions (new sql.PreparedStatement(transaction)), but keep in mind you can't execute other requests in the transaction until you call unprepare.

input (name, type)

Add an input parameter to the prepared statement.

Arguments

• name - Name of the input parameter without @ char.
• type - SQL data type of input parameter.

Example

ps.input('input_parameter', sql.Int)
ps.input('input_parameter', sql.VarChar(50))

Errors (synchronous)

• EARGS (PreparedStatementError) - Invalid number of arguments.
• EINJECT (PreparedStatementError) - SQL injection warning.

output (name, type)

Add an output parameter to the prepared statement.

Arguments

• name - Name of the output parameter without @ char.
• type - SQL data type of output parameter.

Example

ps.output('output_parameter', sql.Int)
ps.output('output_parameter', sql.VarChar(50))

Errors (synchronous)

• EARGS (PreparedStatementError) - Invalid number of arguments.
• EINJECT (PreparedStatementError) - SQL injection warning.

prepare (statement, [callback])

Prepare a statement.

Arguments

• statement - T-SQL statement to prepare.
• callback(err) - A callback which is called after preparation has completed, or an error has occurred. Optional. If omitted, returns Promise.

Example

const ps = new sql.PreparedStatement()
ps.prepare('select @param as value', err => {
    // ... error checks
})

Errors

• ENOTOPEN (ConnectionError) - Connection not yet open.
• EALREADYPREPARED (PreparedStatementError) - Statement is already prepared.
• ENOTBEGUN (TransactionError) - Transaction has not begun.

execute (values, [callback])

Execute a prepared statement.

Arguments

• values - An object whose names correspond to the names of parameters that were added to the prepared statement before it was prepared.
• callback(err) - A callback which is called after execution has completed, or an error has occurred. Optional. If omitted, returns Promise.

Example

const ps = new sql.PreparedStatement()
ps.input('param', sql.Int)
ps.prepare('select @param as value', err => {
    // ... error checks
 
    ps.execute({param: 12345}, (err, result) => {
        // ... error checks
 
        console.log(result.recordset[0].value) // return 12345
        console.log(result.rowsAffected) // Returns number of affected rows in case of INSERT, UPDATE or DELETE statement.
        
        ps.unprepare(err => {
            // ... error checks
        })
    })
})

You can also stream executed request.

const ps = new sql.PreparedStatement()
ps.input('param', sql.Int)
ps.prepare('select @param as value', err => {
    // ... error checks
 
    ps.stream = true
    const request = ps.execute({param: 12345})
 
    request.on('recordset', columns => {
        // Emitted once for each recordset in a query
    })
 
    request.on('row', row => {
        // Emitted for each row in a recordset
    })
 
    request.on('error', err => {
        // May be emitted multiple times
    })
 
    request.on('done', result => {
        // Always emitted as the last one
        
        console.log(result.rowsAffected) // Returns number of affected rows in case of INSERT, UPDATE or DELETE statement.
        
        ps.unprepare(err => {
            // ... error checks
        })
    })
})