Search for a getAlias: Returned empty set

            SELECT a.alias, a.language
            FROM cor_tbl_alias AS a, cor_tbl_module AS b
            WHERE
            CASE
                WHEN a.language = 'en' THEN a.language = 'en'
                ELSE a.language = 'en'
            END
            AND a.aliastype = 1
            AND a.itemkey = 'cor_tbl_module'
            AND a.itemvalue = b.id
            AND b.itemkey = 'fst_cd=AIAC773'