Upload tab delimted file without using GUI_UPLOAD

hi gurus,
my requirement is I have to upload a Tab - delimited text file into a internal table. this should happen as a background job due to which, I cannot use GUI_UPLOAD.
please provide me with code snippets using open dataset and close dataset.
points will be awarded for best code!

Hello,
Check this sample.
CONSTANTS: CON_TAB TYPE X VALUE '09'.
OPEN DATASET P_FILE FOR OUTPUT IN TEXT MODE.
IF SY-SUBRC = 0.
loop at g_T_outtab.
        CONCATENATE G_T_OUTTAB-VBELN
                    G_T_OUTTAB-POSNR
                    G_T_OUTTAB-VKBUR
                    L_F_POSID
                    G_T_OUTTAB-BSTKD
                    L_F_NETWR
                    L_F_ERDAT_OR
                    L_F_ERDAT_IN
                    G_T_OUTTAB-VBELN_IN
                    L_F_ERDAT_DE
                    G_T_OUTTAB-VBELN_DE
                    INTO OUTPUT
                    SEPARATED BY CON_TAB.
      TRANSFER OUTPUT TO P_FILE.
endloop.
endif.
CLOSE DATASET P_FILE.
Cheers,
Vasanth

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