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how to difine unknow table?

hi guys,

now i am trying to define a internal table use the table name which i can get from an input parameter, is that possible? ans if there is any FM about converting the input table into structure or sth like that?


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    author's profile photo Former Member
    Former Member
    Posted on Sep 29, 2005 at 04:57 AM

    Hi Adamyam,

    Actualy i did one program in which i used to take the table name from the user as input , create an internal table depending on that.

    I think this is exactly what you want.You will see some alv related functons here,but they make the task easy.

    *---------------------Global Data -------------------------------------
    TYPE-POOLS: slis.
    Parameters: p_table LIKE dd02l-tabname.
    DATA:     new_table TYPE REF TO data,
              new_line TYPE  REF TO data.
    DATA:     it_fcat TYPE slis_t_fieldcat_alv,
              is_fcat LIKE LINE OF it_fcat.
    DATA:     it_fieldcat TYPE lvc_t_fcat,
              is_fieldcat LIKE LINE OF it_fieldcat.
                   <l_line>  TYPE ANY.
                 i_structure_name = p_table
                 ct_fieldcat      = it_fcat[].
       LOOP AT it_fcat INTO is_fcat.
         MOVE-CORRESPONDING is_fcat TO is_fieldcat.
         is_fieldcat-fieldname = is_fcat-fieldname.
         is_fieldcat-ref_field = is_fcat-fieldname.
         is_fieldcat-ref_table = is_fcat-ref_tabname.
         APPEND is_fieldcat TO it_fieldcat.
    * Create a new Table
       CALL METHOD cl_alv_table_create=>create_dynamic_table
               it_fieldcatalog = it_fieldcat
               ep_table        = new_table.
    * Create a new Line with the same structure of the table.
       ASSIGN new_table->* TO <l_table>.

    So <l_table> will be he dynamic structure..

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  • author's profile photo Former Member
    Former Member
    Posted on Sep 29, 2005 at 02:47 AM

    look at this link


    sample codes

    type-pools : abap.

    data: wa_vbak type vbak .(for u its ur structure)

    data : it_details type abap_compdescr_tab,

    wa_comp type abap_compdescr.

    data : ref_descr type ref to cl_abap_structdescr.

    ref_descr ?= cl_abap_typedescr=>describe_by_data( wa_vbak ).

    it_details[] = ref_descr->components[].


    type-pools: slis.

    field-symbols: <dyn_table> type standard table,

    data: alv_fldcat type slis_t_fieldcat_alv,

    it_fldcat type lvc_t_fcat.


    selection-screen begin of block b1 with frame title text-001.

    parameters: p_check type c.

    selection-screen end of block b1.


    perform build_dyn_itab.

    perform build_report.

    loop at <dyn_table> into <dyn_wa>.

    write:/ <dyn_wa>.



    form build_dyn_itab.

    data: index(3) type c.

    data: new_table type ref to data,

    new_line type ref to data,

    wa_it_fldcat type lvc_s_fcat.

    clear wa_it_fldcat.

    wa_it_fldcat-fieldname = 'AUFNR'.

    wa_it_fldcat-datatype = 'CHAR'.

    wa_it_fldcat-intlen = 12.

    append wa_it_fldcat to it_fldcat .

    clear wa_it_fldcat.

    wa_it_fldcat-fieldname = 'POSNR'.

    wa_it_fldcat-datatype = 'CHAR'.

    wa_it_fldcat-intlen = 6.

    append wa_it_fldcat to it_fldcat .

    • Create fields

    clear index.

    do 2 times.

    index = sy-index.

    clear wa_it_fldcat.

    concatenate 'Field' index into

    wa_it_fldcat-fieldname .

    condense wa_it_fldcat-fieldname no-gaps.

    wa_it_fldcat-datatype = 'CHAR'.

    wa_it_fldcat-intlen = 5.

    append wa_it_fldcat to it_fldcat .


    • Create dynamic internal table and assign to FS

    call method cl_alv_table_create=>create_dynamic_table


    it_fieldcatalog = it_fldcat


    ep_table = new_table. assign new_table->* to <dyn_table>.

    • Create dynamic work area and assign to FS

    create data new_line like line of <dyn_table>.

    assign new_line->* to <dyn_wa>.


    Form build_report*********************************************************************

    form build_report.

    data: fieldname(20) type c.

    data: fieldvalue(5) type c.

    data: index(3) type c.

    field-symbols: <fs1>.

    assign component 'AUFNR' of structure <dyn_wa> to <fs1>.

    <fs1> = '123456789'.

    assign component 'POSNR' of structure <dyn_wa> to <fs1>.

    <fs1> = '000001'.

    do 2 times.

    index = sy-index.

    • Set up fieldname

    concatenate 'FIELD' index into fieldname .

    condense fieldname no-gaps.

    • Set up fieldvalue

    concatenate 'FLD' index into fieldvalue.

    condense fieldvalue no-gaps.

    assign component fieldname of structure <dyn_wa> to <fs1>.

    <fs1> = fieldvalue.


    • Append to the dynamic internal table

    append <dyn_wa> to <dyn_table>.


    hope this will some idea on how to create ur internal table.

    plz reward point if useful



    Message was edited by: Venkat

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