6. The method according to claim 1 , further comprising storing named variable information for said named memory variables to a system catalog coupled to the RDBMS and wherein maintaining a named memory variable comprises referencing named variable information in said system catalog.
7. The method according to claim 6 , wherein the named variable information comprises at least one of a variable name; a data type; a maximum length of the variable; a scale of the variable; an indication whether a value for the named memory variable may change during an execution of the query; duration for the value; and an initial default value for the named memory variable.