Answer Posted / sayak roy

for better performance please use the below syntax.

SORT it_tab2 BY fname1 fname2.

LOOP AT it_itab1 into wa_itab1.
READ TABLE it_tab2 into wa_itab2
WHERE fname1 = wa_itab1-fname1
fname2 = wa_itab1-fname2
BINARY SEARCH.
IF SY_SUBRC = 0.
Do the processing.
ENDIF.
ENDLOOP.

Even if you read the table with INDEX you can sort the table
depending on what result you are expecting from that read,
means, the order and the priority of the value of the
particular fields expected from that READ statement.

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