SET Statement

Execution properties may also be set on the connection by using the SET statement. The SET statement is not yet a language feature of the Data Virtuality Server and is handled only in the JDBC client.

Syntax

SET [payload] (parameter|SESSION AUTHORIZATION) value

Syntax Rules

The parameter must be a non-quoted identifier - it cannot contain spaces.
The value may be either a non-quoted identifier or a quoted string literal value.
If payload is specified, e.g. "SET PAYLOAD x y", then a session scoped payload properties object will have the corresponding name value pair set. The payload object is not fully session scoped. It will be removed from the session when the XAConnection handle is closed/returned to the pool.

The SET statement is most commonly used to control planning and execution:

SET SHOWPLAN (ON|DEBUG|OFF)
SET NOEXEC (ON|OFF)
SET $NOOPT (FALSE|TRUE)
SET $PREFER_DWH (FORCE|ALWAYS|CONDITIONAL|NEVER)
SET $ALLOW_CARTESIAN (NEVER|INTERNAL|IMPLICIT|EXPLICIT|ALWAYS)

The SET statement may also be used to control authorization; see Authorization for more information.

Options changed by the SET statement can be overridden explicitly by the OPTION Clause.