ALV field catalog

[Former Member]

I am trying to create field catalog for list display in ALV report. While declaring internal table of type SLIS_T_FIELDCAT_ALV error is being shown that "it is unidentified " Why is it so? Suggest me most effficient way of creating field catalog.

[Former Member]

Hi ,

Just try to define the Type pool before declaring internal table. I think it will work. Since the structure of SLIS_T_FIELDCAT_ALV  is defined in type pool "SLIS".

ie, TYPE-POOLS:slis.

Regards,

Sajeesh

[Former Member]

Hi,

You can create field catalog in the following way :-

Decleration

    Type-pool :SLIS

   DATA : it_fieldcat    TYPE slis_t_fieldcat_alv,
              wa_fieldcat  TYPE slis_fieldcat_alv.

  CONSTANTS : c_one       TYPE char1  VALUE 1,
                        c_two        TYPE char1  VALUE 2,

                        c_zempid  TYPE char6  VALUE 'ZEMPID',   (name of the field to be displayed)
                        c_zfname  TYPE char6  VALUE 'ZFNAME',

Create Field Catalog

PERFORM field_cat USING : c_one     c_zempid   text-001, (Create the text value for the field)
                                             c_two     c_zfname   text-002,

Field Catalog decleration

   FORM field_cat  USING    p_c_one       TYPE c
                                          p_c_zempid TYPE c
                                          p_text_020   TYPE c.

  wa_fieldcat-col_pos   = p_c_one.
  wa_fieldcat-fieldname = p_c_zempid.
  wa_fieldcat-seltext_m = p_text_020.

  APPEND wa_fieldcat TO it_fieldcat.
  CLEAR wa_fieldcat.

Call the FM for ALV display.

CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
    EXPORTING
      i_callback_program   = sy-repid
      it_fieldcat                 = it_fieldcat
    TABLES
      t_outtab                   = itab
    EXCEPTIONS
      program_error           = 1
      OTHERS                  = 2.

  IF sy-subrc NE 0.
    MESSAGE text-005 TYPE 'E'.
  ENDIF.

Hope it helps.
                

[Former Member]

Hi,  is there any specific reason for using the variables for col_pos instead of entering direct values like wa_fieldcat-col-pos = 2 ?

[Former Member]

Hi Manan,

Its a better custom to use variables/constants  to store constant values or  to avoid hard-coding the values at the point where we are assigning it to some other variables.

ie, We are using text elements for error messages rather than hard-coding it.

Regards,

Sajeesh

[Former Member]

Hi Manan,

As Sajeesh pointed out it is always better to assign some variables than hard coding the values in the report.

Regards,

Srish

[thanga_prakash]

Hello Manan,

Use function module REUSE_ALV_FIELDCATALOG_MERGE to create a fieldcatalog.

Also define TYPE-POOLS: slis in your report to use the type group SLIS.

Regards,

Thanga