Connect to other data sources

Option

Description

CF Data Source Name

The data source name (DSN) that ColdFusion uses to connect to the data source.

JDBC URL

The JDBC Connection URL for this data source.

Driver Class

The fully qualified class name of the JDBC driver. For example, the Microsoft SQL 2000 JDBC driver is com.microsoft.jdbc.sqlserver.SQLServerDriver. The JAR file containing this class must be in the ColdFusion classpath; for example, cf_root/lib.

Driver Name

(Optional) The name of the driver.

Username

The user name that ColdFusion passes to the JDBC driver to connect to the data source if a ColdFusion application does not supply a user name (for example, in a cfquery tag).

Password

The password that ColdFusion passes to the JDBC driver to connect to the data source if a ColdFusion application does not supply a password (for example, in a cfquery tag).

Description

(Optional) A description for this connection.

Connection String

A field that passes database-specific parameters, such as login credentials, to the data source.

Limit Connections

If selected, limits the number of data source connections to the value entered in the Restrict Connections To field.

Restrict Connections To

The maximum number of data source connections; used with the Limit Connections option.

Maintain Connections

ColdFusion establishes a connection to a data source for every operation that requires one. Select this option to improve performance by caching the data source connection.

Timeout (min)

The number of minutes that ColdFusion maintains an unused connection before destroying it.

Interval (min)

The time (in minutes) that the server waits between cycles to check for expired data source connections to close.

Disable Connections

If selected, suspends all client connections.

Login Timeout (sec)

The number of seconds before ColdFusion times out the data source connection login attempt.

CLOB

Select to return the entire contents of any CLOB/Text columns in the database for this data source. If not selected, ColdFusion retrieves the amount specified in the Long Text Buffer setting.

BLOB

Select to return the entire contents of any BLOB/Image columns in the database for this data source. If not selected, ColdFusion retrieves the amount specified in the BLOB Buffer setting.

Long Text Buffer (chr)

The default buffer size, used if the CLOB option is not selected. The default value is 64000 bytes.

BLOB Buffer (bytes)

The default buffer size, used if the BLOB option is not selected. The default value is 64000 bytes.

Allowed SQL

The SQL operations that can interact with the current data source.

Validation Query

Called when a connection from the pool is resued. This can slow query response time because an additional query is generated. You should specify this just before restarting the database to verify all connections, but remove the validation query after restarting the database to avoid any performance loss.