Description
The call statement enables you to call an Ingres tool from within an embedded QUEL program. When calling an Ingres tool:
subsystem
Must be the name of an Ingres tool
dbname
Must be the name of the current database. You cannot invoke the Ingres tool on a different database.
parameter
Must be the name of a parameter accepted by the Ingres tool being called
value
Must be the value to be assigned to the parameter. If a particular parameter has no value, a null string (empty quotes) must be used.
Note: When your application calls an Ingres tool, the state of open transactions, open cursors, and repeat queries is not preserved. Each call to an Ingres tool must be considered as a separate DBMS server session.
When the user exits from the Ingres tool, control passes to the statement following the call. When used to call the operating system, the specified command_string is executed as if the user typed it at the operating system command line.
If command_string is a null, empty, or blank string, the statement transfers control to the operating system. The user can execute any operating system commands. Logging out returns the user to the application.
For more information about calling Ingres tools, see
Calling Ingres Tools from Embedded QUEL.