SAP IQ translator wrong pushdown of dateadd function

SAP IQ translator's pushdown of DATEADD function is wrong.

The function DATEADD has following signature in SAP IQ:

DATEADD ( date-part, numeric-expression, date-expression )

the date-part is of type Date Part, see (1).

Teiid is currently pushing DATEADD function with date-part argument as string, which causes an error. It should be Date Part identifier, e.g. instead of 'DAY', it should be DAY.

(1) http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.infocenter.dc38159.1600/doc/html/san1277395118633.html