can we create internal table dynamically ? how?

[Former Member]

hi to all experts,

can we create internal table dynamically ? how?plz explain me with an example.Anybody with good example will be rewarded.it was asked in an interview what the answer for it

[Former Member]

hi,

check this sample program............

REPORT ZCLUST1 .

• Example: how to create a dynamic internal table

• The dynamic internal table stucture

DATA: BEGIN OF STRUCT OCCURS 10,

FILDNAME(8) TYPE C,

ABPTYPE TYPE C,

LENGTH TYPE I,

END OF STRUCT.

• The dynamic program source table

DATA: BEGIN OF INCTABL OCCURS 10,

LINE(72),

END OF INCTABL.

DATA: LNG TYPE I, TYPESRTING(6).

• Sample dynamic internal table stucture

STRUCT-FILDNAME = 'field1'. STRUCT-ABPTYPE = 'c'. STRUCT-LENGTH = '6'.

APPEND STRUCT. CLEAR STRUCT.

STRUCT-FILDNAME = 'field2'. STRUCT-ABPTYPE = 'd'.

APPEND STRUCT. CLEAR STRUCT.

STRUCT-FILDNAME = 'field3'. STRUCT-ABPTYPE = 'i'.

APPEND STRUCT. CLEAR STRUCT.

• Create the dynamic internal table definition in the dyn. program

INCTABL-LINE = 'program zdynpro.'. APPEND INCTABL.

INCTABL-LINE = 'data: begin of dyntab occurs 10,'. APPEND INCTABL.

LOOP AT STRUCT.

INCTABL-LINE = STRUCT-FILDNAME.

LNG = STRLEN( STRUCT-FILDNAME ).

IF NOT STRUCT-LENGTH IS INITIAL .

TYPESRTING(1) = '('.

TYPESRTING+1 = STRUCT-LENGTH.

TYPESRTING+5 = ')'.

CONDENSE TYPESRTING NO-GAPS.

INCTABL-LINE+LNG = TYPESRTING.

ENDIF.

INCTABL-LINE+15 = 'type '.

INCTABL-LINE+21 = STRUCT-ABPTYPE.

INCTABL-LINE+22 = ','.

APPEND INCTABL.

ENDLOOP.

INCTABL-LINE = 'end of dyntab. '.

APPEND INCTABL.

• Create the code processes the dynamic internal table

INCTABL-LINE = ' '. APPEND INCTABL.

INCTABL-LINE = 'dyntab-field1 = ''aaaaaa''.'. APPEND INCTABL.

INCTABL-LINE = 'dyntab-field1 = ''19970814''.'. APPEND INCTABL.

INCTABL-LINE = 'dyntab-field1 = 1.'. APPEND INCTABL.

INCTABL-LINE = 'append dyntab.'. APPEND INCTABL.

INCTABL-LINE = ' '. APPEND INCTABL.

INCTABL-LINE = 'loop at dyntab.'. APPEND INCTABL.

INCTABL-LINE = 'write: / dyntab.'. APPEND INCTABL.

INCTABL-LINE = 'endloop.'. APPEND INCTABL.

• Create and run the dynamic program

INSERT REPORT 'zdynpro'(001) FROM INCTABL.

SUBMIT ZDYNPRO.

-

---

or Just try out this simpler dynamic internal tables

DATA: itab TYPE STANDARD TABLE OF spfli,

wa LIKE LINE OF itab.

DATA: line(72) TYPE c,

list LIKE TABLE OF line(72).

START-OF-SELECTION.

*line = ' CITYFROM CITYTO '.

line = ' AIRPTO '.

APPEND line TO list.

SELECT DISTINCT (list)

INTO CORRESPONDING FIELDS OF TABLE itab

FROM spfli.

IF sy-subrc EQ 0.

LOOP AT itab INTO wa.

• WRITE: / wa-cityfrom, wa-cityto.

WRITE 😕 wa-airpto.

ENDLOOP.

ENDIF.

[Former Member]

HI

Yes you can create

see this

/people/rich.heilman2/blog/2005/07/27/dynamic-internal-tables-and-structures--abap

JUST USE THIS CODE AND DO THE ESSENTIAL CHANGES ACCORDING TO YOU

• STEP: 1 - get backend field catalog (currently displayed alv)

CLEAR: tl_fieldcatalog. REFRESH: tl_fieldcatalog.

CALL METHOD w_grid->get_backend_fieldcatalog

IMPORTING

et_fieldcatalog = tl_fieldcatalog.

• STEP: 2 - create a new fieldcatalog for dynamic internal table

CLEAR: sl_fieldcatalog.

CLEAR: t_outtab_fieldname. REFRESH: t_outtab_fieldname.

CLEAR: tl_fieldcatalog_new. REFRESH: tl_fieldcatalog_new.

CLEAR: t_download_fieldname. REFRESH: t_download_fieldname.

CLEAR: t_download_fieldheading. REFRESH: t_download_fieldheading.

LOOP AT tl_fieldcatalog INTO sl_fieldcatalog.

• STEP: 2.1 - populate data in T_OUTTAB_FIELDNAME

APPEND sl_fieldcatalog-fieldname TO t_outtab_fieldname.

• STEP: 2.2 - populate TL_FIELDCATALOG_NEW & T_DOWNLOAD_FIELDNAME

IF sl_fieldcatalog-no_out EQ ''.

IF sl_fieldcatalog-fieldname NE 'STATUS'

OR sl_fieldcatalog-fieldname NE 'MESG_STATUS'

OR sl_fieldcatalog-fieldname NE 'ZLOCK'

OR sl_fieldcatalog-fieldname NE 'T_PLANT'

OR sl_fieldcatalog-fieldname NE 'T_CSR'.

• If field is COMM_PLANT, change its length

IF sl_fieldcatalog-fieldname EQ 'COMM_PLANT'.

sl_fieldcatalog-outputlen = 1800.

sl_fieldcatalog-intlen = 1800.

sl_fieldcatalog-dd_outlen = 1800.

ENDIF. "comm_plant

sl_fieldcatalog_new = sl_fieldcatalog.

APPEND sl_fieldcatalog_new TO tl_fieldcatalog_new.

APPEND sl_fieldcatalog-fieldname TO t_download_fieldname.

APPEND sl_fieldcatalog-scrtext_l TO t_download_fieldheading.

CLEAR: sl_fieldcatalog, sl_fieldcatalog_new.

ENDIF.

ENDIF.

ENDLOOP.

• STEP: 3 - create dynamic internal table

FREE: ref_download.

CALL METHOD cl_alv_table_create=>create_dynamic_table

EXPORTING

• I_STYLE_TABLE =

it_fieldcatalog = tl_fieldcatalog_new

IMPORTING

ep_table = ref_download

• E_STYLE_FNAME =

EXCEPTIONS

generate_subpool_dir_full = 1

OTHERS = 2

.

IF sy-subrc <> 0.

MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno

WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.

ENDIF.

ASSIGN ref_download->* TO <ft_download>.

CREATE DATA ref_wa LIKE LINE OF <ft_download>.

ASSIGN ref_wa->* TO <fs_download>.

• STEP: 4 - populate data in dynamic internal table

LOOP AT t_outtab INTO wa_outtab.

LOOP AT t_download_fieldname.

ASSIGN COMPONENT t_download_fieldname OF STRUCTURE

<fs_download> TO <fs_download_field>.

IF t_download_fieldname-field EQ 'COMM_PLANT'.

• STEP: 4.1 - get long text from database table

CLEAR: wal_table.

SELECT SINGLE * FROM zshaven_plnt_txt

INTO wal_table

WHERE vbeln = wa_outtab-vbeln

AND posnr = wa_outtab-posnr

AND del_no = wa_outtab-del_no

AND del_itm = wa_outtab-del_itm.

IF sy-subrc EQ 0.

• STEP: 4.2 - break long-text into separate lines

CLEAR: tl_text. REFRESH: tl_text.

SPLIT wal_table-plant_comm

AT '~'

INTO TABLE tl_text.

• STEP: 4.3 - Combine these separate lines with space in

• between two lines

CLEAR: wal_text, final_text.

LOOP AT tl_text INTO wal_text.

IF final_text IS INITIAL.

final_text = wal_text.

ELSE.

CONCATENATE final_text '-' wal_text

INTO final_text.

REPLACE '-' WITH ' ' INTO final_text.

ENDIF.

ENDLOOP.

• STEP: 4.4 - move long text to work-area

<fs_download_field> = final_text.

ENDIF. "subrc

ELSE. "t_download_fieldname

READ TABLE t_outtab_fieldname

WITH KEY field = t_download_fieldname-field.

ASSIGN COMPONENT t_outtab_fieldname-field OF STRUCTURE

wa_outtab TO <fs_outtab_field>.

<fs_download_field> = <fs_outtab_field>.

ENDIF.

ENDLOOP.

• STEP: 4.5 - Move data from work-area to dynamic internal table

APPEND <fs_download> TO <ft_download>.

CLEAR: <fs_download>.

ENDLOOP.

• STEP: 5 - download

CALL FUNCTION 'DOWNLOAD'

EXPORTING

filename = 'C:\zshaven.xls'

filetype = 'DAT'

filetype_no_show = 'X'

filetype_no_change = 'X'

TABLES

data_tab = <ft_download>

fieldnames = t_download_fieldheading

EXCEPTIONS

invalid_filesize = 1

invalid_table_width = 2

invalid_type = 3

no_batch = 4

unknown_error = 5

gui_refuse_filetransfer = 6

customer_error = 7

OTHERS = 8.

IF sy-subrc <> 0.

MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno

WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.

ENDIF.

[Former Member]

Hi,

You can very well create internal tables dynamically.

Please check the below links for more details on it.

http://www.sap-img.com/ab030.htm

/people/rich.heilman2/blog/2005/07/27/dynamic-internal-tables-and-structures--abap

Reward if useful.

Regards

Sayee