ABAP Select data from SAP table FMLI_S_ALV_MAIN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FMLI_S_ALV_MAIN table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to FMLI_S_ALV_MAIN. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the FMLI_S_ALV_MAIN table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_FMLI_S_ALV_MAIN TYPE STANDARD TABLE OF FMLI_S_ALV_MAIN,
      WA_FMLI_S_ALV_MAIN TYPE FMLI_S_ALV_MAIN,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <FMLI_S_ALV_MAIN> TYPE FMLI_S_ALV_MAIN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FMLI_S_ALV_MAIN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FMLI_S_ALV_MAIN
  INTO TABLE IT_FMLI_S_ALV_MAIN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMLI_S_ALV_MAIN
*  INTO TABLE @DATA(IT_FMLI_S_ALV_MAIN2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_FMLI_S_ALV_MAIN INDEX 1 INTO DATA(WA_FMLI_S_ALV_MAIN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FMLI_S_ALV_MAIN ASSIGNING <FMLI_S_ALV_MAIN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMLI_S_ALV_MAIN>-DOCLN = 1.
<FMLI_S_ALV_MAIN>-VALTYPE_9 = 1.
<FMLI_S_ALV_MAIN>-VALTYPE_TXT = 1.
<FMLI_S_ALV_MAIN>-WFSTATE_9 = 1.
<FMLI_S_ALV_MAIN>-WFSTATET = 1.

ENDLOOP.

LOOP AT IT_FMLI_S_ALV_MAIN INTO WA_FMLI_S_ALV_MAIN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMLI_S_ALV_MAIN-LINE_SIGN, sy-vline,
  WA_FMLI_S_ALV_MAIN-RGRANT_NBR, sy-vline,
  WA_FMLI_S_ALV_MAIN-RFUND, sy-vline,
  WA_FMLI_S_ALV_MAIN-RFUNDSCTR, sy-vline,
  WA_FMLI_S_ALV_MAIN-RCMMTITEM, sy-vline,
  WA_FMLI_S_ALV_MAIN-RFUNCAREA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMLI_S_ALV_MAIN you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_FMLI_S_ALV_MAIN TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_FMLI_S_ALV_MAIN INTO WA_FMLI_S_ALV_MAIN.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field RGRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMLI_S_ALV_MAIN-RGRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLI_S_ALV_MAIN-RGRANT_NBR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIL, internal->external for field RCMMTITEM
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_FMLI_S_ALV_MAIN-RCMMTITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLI_S_ALV_MAIN-RCMMTITEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field CEFFYEAR_9
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FMLI_S_ALV_MAIN-CEFFYEAR_9
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLI_S_ALV_MAIN-CEFFYEAR_9.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMLI_S_ALV_MAIN-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMLI_S_ALV_MAIN-RLDNR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_FMLI_S_ALV_MAIN_STR, 
DOCLN TYPE STRING,
VALTYPE_9 TYPE STRING,
VALTYPE_TXT TYPE STRING,
WFSTATE_9 TYPE STRING,
WFSTATET TYPE STRING,
LINE_SIGN TYPE STRING,
RGRANT_NBR TYPE STRING,
RFUND TYPE STRING,
RFUNDSCTR TYPE STRING,
RCMMTITEM TYPE STRING,
RFUNCAREA TYPE STRING,
RMEASURE TYPE STRING,
BUDGET_PD_9 TYPE STRING,
RUSERDIM TYPE STRING,
BUDTYPE_9 TYPE STRING,
CEFFYEAR_9 TYPE STRING,
TOTAL_AMOUNT TYPE STRING,
RTCUR TYPE STRING,
CURR_UI TYPE STRING,
RLDNR TYPE STRING,
BUDCAT_TEXT TYPE STRING,
PROCESS_9 TYPE STRING,
PROCESS_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMLI_S_ALV_MAIN_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_FMLI_S_ALV_MAIN_STR-DOCLN sy-vline 
WA_FMLI_S_ALV_MAIN_STR-VALTYPE_9 sy-vline 
WA_FMLI_S_ALV_MAIN_STR-VALTYPE_TXT sy-vline 
WA_FMLI_S_ALV_MAIN_STR-WFSTATE_9 sy-vline 
WA_FMLI_S_ALV_MAIN_STR-WFSTATET sy-vline 
WA_FMLI_S_ALV_MAIN_STR-LINE_SIGN sy-vline 
WA_FMLI_S_ALV_MAIN_STR-RGRANT_NBR sy-vline 
WA_FMLI_S_ALV_MAIN_STR-RFUND sy-vline 
WA_FMLI_S_ALV_MAIN_STR-RFUNDSCTR sy-vline 
WA_FMLI_S_ALV_MAIN_STR-RCMMTITEM sy-vline 
WA_FMLI_S_ALV_MAIN_STR-RFUNCAREA sy-vline 
WA_FMLI_S_ALV_MAIN_STR-RMEASURE sy-vline 
WA_FMLI_S_ALV_MAIN_STR-BUDGET_PD_9 sy-vline 
WA_FMLI_S_ALV_MAIN_STR-RUSERDIM sy-vline 
WA_FMLI_S_ALV_MAIN_STR-BUDTYPE_9 sy-vline 
WA_FMLI_S_ALV_MAIN_STR-CEFFYEAR_9 sy-vline 
WA_FMLI_S_ALV_MAIN_STR-TOTAL_AMOUNT sy-vline 
WA_FMLI_S_ALV_MAIN_STR-RTCUR sy-vline 
WA_FMLI_S_ALV_MAIN_STR-CURR_UI sy-vline 
WA_FMLI_S_ALV_MAIN_STR-RLDNR sy-vline 
WA_FMLI_S_ALV_MAIN_STR-BUDCAT_TEXT sy-vline 
WA_FMLI_S_ALV_MAIN_STR-PROCESS_9 sy-vline 
WA_FMLI_S_ALV_MAIN_STR-PROCESS_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.