BKPF Performence Issue

Hello,

I am using BKPF table to fetch FI documents but it is taking so much time.

How to reduce time. Please guide me.

Here is my code:

SELECT xblnr bldat FROM bkpf

INTO TABLE it_bkpf1

FOR ALL ENTRIES IN it_bkpf

WHERE awkey = it_bkpf-awkey

belnr = it_bkpf-belnr

and gjahr = it_bkpf-gjahr.