Database Connections
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Database formats include a Database Connection parameter that defines and stores authentication information. For general information about sharing database connections, please see Using Database Connections. Note that Database Connection parameters may differ slightly, depending on context and/or database format. |
Connection
Select an existing connection, or Add Database Connection to define a new connection.
The new connection can be made visible only to the current user, or can be shared among multiple users.
Schemas for Table Listing
Schemas are used to organize tables. This parameter provides the list of viewable schemas.
If this parameter is left blank, the Table List dialog will only show choices from the search path for the current user. Selecting specific schemas here will cause tables from those schemas to be shown instead.
This parameter also specifies the schemas to fetch candidate tables when merging feature types. If it is not set, candidate tables are fetched based on the search path for the current user.
Connection Parameters
Host
This specifies the machine running the Redshift ORDBMS as either an IP address or host name. The database must have proper permissions and be set up to accept TCP/IP connections if connecting from a remote machine.
Port
When connecting remotely, this specifies the TCP/IP port on which to connect to the ORDBMS service. The default port is 5439.
Database
This specifies the name of the Redshift database. The database must exist in the ORDBMS.
Username and Password
Enter the username and password to access the service.
Constraints
Table List
After you have specified the database connection, click the Browse button to select tables for import. A connection window appears while the system compiles a table from the database.
Once the table list appears, you can select one or more tables, and then click OK to dismiss the window. The table name(s) will appear in the Table List field in the parameter box.
Schema Attributes
Additional Attributes to Expose
Use this parameter to expose Format Attributes in Workbench when you create a workspace:
- In a dynamic scenario, it means these attributes can be passed to the output dataset at runtime.
- In a non-dynamic scenario, you can use this parameter to expose additional attributes on multiple feature types.
Advanced
Number Of Records To Fetch At A Time
The number of rows that are retrieved at one time into local memory from the data source. For example, if set to 10, the reader reads ten rows into local memory, and processes features from this memory buffer. After the reading the last row, the reader retrieves the next 10 rows from the data source.
Note: If this parameter is incorrectly set, it will cause significantly degraded performance. The optimum value depends primarily on the characteristics of individual records and the transport between the database and the client machine. It is less affected by the quantity of rows that are to be retrieved. The optimal value is the default value of 10.