the structure of the table and index are

[japerez]

desc ausp
Name Null? Type
*MANDT NOT NULL VARCHAR2(3)
*OBJEK NOT NULL VARCHAR2(50)
*ATINN NOT NULL VARCHAR2(10)
* ATZHL NOT NULL VARCHAR2(3)
* MAFID NOT NULL VARCHAR2(1)
*KLART NOT NULL VARCHAR2(3)
ADZHL NOT NULL VARCHAR2(4)
*ATWRT VARCHAR2(30)
* ATFLV FLOAT(126)
ATAWE VARCHAR2(3)
ATFLB FLOAT(126)
ATAW1 VARCHAR2(3)
ATCOD NOT NULL VARCHAR2(1)
ATTLV FLOAT(126)
ATTLB FLOAT(126)
ATPRZ VARCHAR2(1)
ATINC FLOAT(126)
ATAUT VARCHAR2(1)
AENNR VARCHAR2(12)
*DATUV NOT NULL VARCHAR2(8)
LKENZ NOT NULL VARCHAR2(1)
ATIMB VARCHAR2(10)
ATZIS VARCHAR2(3)
ATSRT NOT NULL VARCHAR2(4)
ATVGLART NOT NULL VARCHAR2(1)

* those fields compose the index

[sambavan]

They are not null colums. So it doesn't mean they are indexed.

Sam