HANA translator : DAYNAME function is not pushed

Teiid's DAYNAME function is not being pushed to HANA even though it could be as HANA's DAYNAME function. The only difference could be that HANA returns names in capital letters.
Query:

SELECT DAYNAME(datevalue) FROM bqt1.smalla

Source specific query:

SELECT g_0."DATEVALUE" FROM "BQT1"."SMALLA" AS g_0