ODBC Driver for SQL Server

Connection String Options - ODBC Driver for SQL Server

SQL Server ODBC Connection String Options

The following table lists the connection string options for SQL Server.

Option Description

Authentication

Used to specify the SQL Server authentication mode.

  • Server - The SQL Server username and password are used to authenticate the user to the server.
  • Windows - The Windows account is used to authenticate the user to the server.

Database

Used to set the name of the database

Password

Used to supply a password for login.

Port

Used to specify the port number for the connection. 1433 by default.

Server

Serves to supply the server name for login.

Username

Used to supply a user name for login.

Advanced Settings

Option Description

Allow NULL strings

To retrieve metadata, not all parameters according to MSDN can accept a null value. If NULL, the driver should return an error. But some 3rd-party tools pass NULL to the parameters. These options should be enabled for compatibility with such tools.

Empty strings as NULL

ApplicationIntent

Used to specify the application workload type when connecting to a server.

ApplicationName

The name of a client application. The default value is the name of the executable file of your application.

AutoTranslate

Used to translate character strings sent between the client and server by converting through Unicode.

Connection Timeout

The time (in seconds) to wait for a connection to open before terminating an attempt. The default value is 15.

Encryption

Specifies if data should be encrypted before sending it over the network.

IP Version The Internet Protocol Version.
ivIPv4
The default value. Internet Protocol Version 4 (IPv4) is used.
ivIPv6
Internet Protocol Version 6 (IPv6) is used.
ivIPBoth
Either Internet Protocol Version 6 (IPv6) or Version 4 (IPv4) is used.
Note: When the property is set to ivIPBoth, a connection attempt is made via IPv6 if it is enabled in the operating system. If the connection attempt fails, a new connection attempt is made via IPv4.

MultipleActiveResultSets

Enables support for the Multiple Active Result Sets (MARS) technology.

MultipleConnections

Enables or disables the creation of additional connections to support concurrent sessions, commands and rowset objects.

ODBC Behavior

Used to set the behavior corresponding to the ODBC specification version that a third-party tool expects. The behavior of ODBC driver can be changed by setting a value for the SQL_ATTR_ODBC_VERSION attribute by calling the SQLSetEnvAttr function. But some third-party tools expect the driver to exhibit ODBC 2.x behavior, but forget to call SQLSetEnvAttr with the specified version or pass an incorrect value there. In this case, the required behavior can be explicitly specified in the Connection String by setting the ODBC Behavior parameter. The possible values are:

  • Default - default ODBC behavior determined by a third-party tool.
  • Ver 2.x - ODBC 2.x behavior is explicitly set.
  • Ver 3.x - ODBC 3.x behavior is explicitly set.

PacketSize

Network packet size in bytes.

RegionalNumberSettings

Enables the use of local regional settings when converting numbers to strings.

RegionalDateTimeSettings

Enables the use of local regional settings when converting dates and times to strings.

String Types

Sets the string value types returned by the driver as Default, Ansi or Unicode.

  • Default - the driver defines the string types.
  • Ansi - all string types will be returned as SQL_CHAR, SQL_VARCHAR and SQL_LONGVARCHAR.
  • Unicode - all string types will be returned as SQL_WCHAR, SQL_WVARCHAR and SQL_WLONGVARCHAR.

The option value should be changed if any third-party tool supports only Ansi string types or Unicode ones.

Sample SQL Server ODBC Connection String

DRIVER={Devart ODBC Driver for SQL Server};Data Source=DBMSSQL;Initial Catalog=myDatabase;User ID=sa;Port=1433

See also:

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