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ALV Tree and set_table_for_first_display problem

Former Member

‎2010 Jan 21 3:44 AM

0 Likes
1,271

I am trying to create an alv tree. I have some sample code that uses the sflight table and this works fine however when i replace sflight with my internal structure and table it crashes at set_table_for_first_display with a "Field symbol has not been assigned" error.

This is part of the original code that works. *This isn't all the code just the relevant parts.

DATA: gt_sflight      TYPE sflight OCCURS 0,   " Output-Table
           gt_fieldcatalog TYPE lvc_t_fcat,            " Field Catalog

CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
    EXPORTING
      i_structure_name = 'sflight'
    CHANGING
      ct_fieldcat      = gt_fieldcatalog.

*  change fieldcatalog
  DATA: ls_fieldcatalog TYPE lvc_s_fcat.
  LOOP AT gt_fieldcatalog INTO ls_fieldcatalog.
    CASE ls_fieldcatalog-fieldname.
      WHEN 'CARRID' OR 'CONNID' OR 'FLDATE'.
        ls_fieldcatalog-no_out = 'X'.
        ls_fieldcatalog-key    = ''.
      WHEN 'PRICE' OR 'SEATSOCC' OR 'SEATSMAX' OR 'PAYMENTSUM'.
        ls_fieldcatalog-do_sum = 'X'.
    ENDCASE.
    MODIFY gt_fieldcatalog FROM ls_fieldcatalog.
  ENDLOOP.

SELECT * FROM sflight INTO TABLE gt_sflight.

create hierarchy
  CALL METHOD tree1->set_table_for_first_display
    EXPORTING
      it_list_commentary = lt_list_commentary
      i_logo             = l_logo
      i_background_id    = 'ALV_BACKGROUND'
      i_save             = 'A'
      is_variant         = ls_variant
    CHANGING
      it_sort            = gt_sort
      it_outtab          = gt_sflight
      it_fieldcatalog    = gt_fieldcatalog.

Here is the code when I replace gt_sflight with my internal table.

DATA: gt_detailed      TYPE ZDT_REPORT1_DETAIL_STRUC occurs 0 ,   " Output-Table
           gt_fieldcatalog TYPE lvc_t_fcat,         " Field Catalog

CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
    EXPORTING
      i_structure_name = 'ZDT_REPORT1_DETAIL_STRUC'
    CHANGING
      ct_fieldcat      = gt_fieldcatalog
    EXCEPTIONS
      inconsistent_interface = 1
      program_error = 2
      OTHERS = 3.
    IF sy-subrc <> 0.
*--Exception handling
    ENDIF.


"* change fieldcatalog
  DATA: ls_fieldcatalog TYPE lvc_s_fcat.
  LOOP AT gt_fieldcatalog INTO ls_fieldcatalog.
    CASE ls_fieldcatalog-fieldname.
      WHEN 'COMP_DESC' OR 'SUBC_DESC'.
        ls_fieldcatalog-no_out = 'X'.
        ls_fieldcatalog-key    = ''.
      WHEN 'DOWNTIME'.
        ls_fieldcatalog-do_sum = 'X'.
    ENDCASE.
    MODIFY gt_fieldcatalog FROM ls_fieldcatalog.
  ENDLOOP.

" Select statement to fill gt_detailed

* create hierarchy
  CALL METHOD tree1->set_table_for_first_display
    EXPORTING
      it_list_commentary = lt_list_commentary
      i_logo             = l_logo
      i_background_id    = 'ALV_BACKGROUND'
      i_save             = 'A'
      is_variant         = ls_variant
    CHANGING
      it_sort            = gt_sort
      it_outtab          = gt_detailed
      it_fieldcatalog    = gt_fieldcatalog.

When it runs like this it crashes at set_table_for_first_display

I am trying to create an alv tree. I have some sample code that uses the sflight table and this works fine however when i replace sflight with my internal structure and table it crashes at set_table_for_first_display with a "Field symbol has not been assigned" error.

This is part of the original code that works. *This isn't all the code just the relevant parts.

DATA: gt_sflight      TYPE sflight OCCURS 0,   " Output-Table
           gt_fieldcatalog TYPE lvc_t_fcat,            " Field Catalog

CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
    EXPORTING
      i_structure_name = 'sflight'
    CHANGING
      ct_fieldcat      = gt_fieldcatalog.

*  change fieldcatalog
  DATA: ls_fieldcatalog TYPE lvc_s_fcat.
  LOOP AT gt_fieldcatalog INTO ls_fieldcatalog.
    CASE ls_fieldcatalog-fieldname.
      WHEN 'CARRID' OR 'CONNID' OR 'FLDATE'.
        ls_fieldcatalog-no_out = 'X'.
        ls_fieldcatalog-key    = ''.
      WHEN 'PRICE' OR 'SEATSOCC' OR 'SEATSMAX' OR 'PAYMENTSUM'.
        ls_fieldcatalog-do_sum = 'X'.
    ENDCASE.
    MODIFY gt_fieldcatalog FROM ls_fieldcatalog.
  ENDLOOP.

SELECT * FROM sflight INTO TABLE gt_sflight.

create hierarchy
  CALL METHOD tree1->set_table_for_first_display
    EXPORTING
      it_list_commentary = lt_list_commentary
      i_logo             = l_logo
      i_background_id    = 'ALV_BACKGROUND'
      i_save             = 'A'
      is_variant         = ls_variant
    CHANGING
      it_sort            = gt_sort
      it_outtab          = gt_sflight
      it_fieldcatalog    = gt_fieldcatalog.

Here is the code when I replace gt_sflight with my internal table.

DATA: gt_detailed      TYPE ZDT_REPORT1_DETAIL_STRUC occurs 0 ,   " Output-Table
           gt_fieldcatalog TYPE lvc_t_fcat,         " Field Catalog

CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
    EXPORTING
      i_structure_name = 'ZDT_REPORT1_DETAIL_STRUC'
    CHANGING
      ct_fieldcat      = gt_fieldcatalog
    EXCEPTIONS
      inconsistent_interface = 1
      program_error = 2
      OTHERS = 3.
    IF sy-subrc <> 0.
*--Exception handling
    ENDIF.


"* change fieldcatalog
  DATA: ls_fieldcatalog TYPE lvc_s_fcat.
  LOOP AT gt_fieldcatalog INTO ls_fieldcatalog.
    CASE ls_fieldcatalog-fieldname.
      WHEN 'COMP_DESC' OR 'SUBC_DESC'.
        ls_fieldcatalog-no_out = 'X'.
        ls_fieldcatalog-key    = ''.
      WHEN 'DOWNTIME'.
        ls_fieldcatalog-do_sum = 'X'.
    ENDCASE.
    MODIFY gt_fieldcatalog FROM ls_fieldcatalog.
  ENDLOOP.

" Select statement to fill gt_detailed

* create hierarchy
  CALL METHOD tree1->set_table_for_first_display
    EXPORTING
      it_list_commentary = lt_list_commentary
      i_logo             = l_logo
      i_background_id    = 'ALV_BACKGROUND'
      i_save             = 'A'
      is_variant         = ls_variant
    CHANGING
      it_sort            = gt_sort
      it_outtab          = gt_detailed
      it_fieldcatalog    = gt_fieldcatalog.

When it runs like this it crashes at set_table_for_first_display

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3 REPLIES 3
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Former Member

‎2010 Jan 21 4:23 AM

0 Likes
859

Hi,

Have a look at this program it will be pretty much clearer then,

BCALV_TREE_01

Hope it helps you,

Regards,

Abhijit G. Borkar

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Former Member
In response to Former Member

‎2010 Jan 21 5:52 AM

0 Likes
859

The code I am using as an example is BCALV_TREE_SIMPLE_DEMO. If I have no data in my table it doesn't error when I call set_table_for_first_display.

But it looks like I might have to use that one instead because from what I understand you can use cl_gui_alv_tree_simple when the input table has all the required columns such as sflight but you use cl_gui_alv_tree when you need an internal table.

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Former Member

‎2010 Jan 22 2:42 AM

0 Likes
859

I needed to use cl_gui_alv_tree instead of cl_gui_alv_tree_simple. BCALV_TREE_01 is a good example.