REPORT  z05_10.

TYPES: BEGIN OF  t_line,
       col1 TYPE i,
       col2 TYPE i,
  END OF t_line.

DATA gt_itab TYPE SORTED TABLE OF t_line WITH NON-UNIQUE KEY COL1
      WITH HEADER LINE.

*DO 10000000 TIMES.
DO 10000 TIMES.
  gt_itab-col1 = sy-index.
  gt_itab-col2 = sy-index.
  INSERT table gt_itab.
ENDDO.

READ TABLE gt_itab WITH KEY col1 = 99999.