Valid Attribute Names and Values

The table lists valid attribute names and values for the dsn keyword argument.

Name

Description

Value

ANSINull

Determines whether evaluation of NULL-valued operands in SQL equality (=) or inequality (!=) comparisons is ANSI-compliant.

If the value is true, Adaptive Server enforces the ANSI behavior that = NULL and is NULL are not equivalent. In standard Transact-SQL, = NULL and is NULL are considered to be equivalent.

This option affects <> NULL and is not NULL behavior in a similar fashion.

Boolean value.

The default is false.

BulkLogin

Determines whether a connection is enabled to perform a bulk-copy operation.

Boolean value.

The default is false.

ChainXacts

If true, Adaptive Server uses chained transaction behavior, that is, each server command is considered to be a distinct transaction.

Adaptive Server implicitly executes a begin transaction before any of these statements: delete, fetch, insert, open, select, and update. You must still explicitly end or roll back the transaction.

If false, an application must specify explicit begin transaction statements paired with commit or rollback statements.

Boolean value.

The default is false.

Charset

Specifies the charset to be used on this connection.

String value.

Confidentiality

Whether data encryption service is performed on the connection.

Boolean value.

The default is false.

CredentialDelegation

Determines whether to allow the server to connect to a second server with the user’s delegated credentials.

Boolean value.

The default is false.

DetectReplay

Determines whether the connection’s security mechanism detects replayed transmissions.

Boolean value.

The default is false.

DetectOutOfSequence

Determines whether the connection’s security mechanism detects transmissions that arrive out of sequence.

Boolean value.

The default is false.

Integrity

Determines whether the connection’s security mechanism performs data integrity checking.

Boolean value.

The default is false.

Interfaces

The path and name of the interfaces file.

String value.

Keytab

The name and path to the file from which a connection’s security mechanism reads the security key to go with the username value.

String value.

The default is NULL, that is, the user must have established credentials before connecting.

Locale

Determines which language and character set to use for messages, datatype conversions, and datetime formats.

String value.

Language

Determines which language set to use for messages, datatype conversions, and datetime formats.

String value.

LoginTimeout

Specifies the login timeout value.

Integer value.

MaxConnect

Specifies the maximum number of simultaneously open connections that a context may have.

Integer value.

Default value is 25. Negative and zero values are not allowed.

MutualAuthentication

Determines whether the server is required to authenticate itself to the client.

Boolean value.

The default is false.

NetworkAuthentication

Determines whether the connection’s security mechanism performs network-based user authentication.

Boolean value.

The default is false.

PacketSize

Specifies the TDS packet size.

Integer value.

Password

Specifies the password used to log in to the server.

String value.

PasswordEncryption

Determines whether the connection uses asymmetrical password encryption.

Boolean value.

The default is false.

SecurityMechanism

Specifies the name of the network security mechanism that performs security services for the connection.

String value.

The default value depends on security driver configuration.

Server

Servername

Specifies the name of the server to which you are connected.

String value.

ServerPrincipalName

Specifies the network security principal name for the server to which a connection is opened.

String value.

The default is NULL, which means that the connection assumes the server principal name is the same as its ServerName value.

TDS_Keepalive

Determines whether to use the KEEPALIVE option.

Boolean value.

The default is true.

Timeout

Specifies the connection timeout value.

Integer value.

UID

User

Username

Specifies the name used to log in to the server.

String value.