ABAP Select data from SAP table RN1FOFOA_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1FOFOA_ALV 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 RN1FOFOA_ALV. 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 RN1FOFOA_ALV 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_RN1FOFOA_ALV TYPE STANDARD TABLE OF RN1FOFOA_ALV,
      WA_RN1FOFOA_ALV TYPE RN1FOFOA_ALV,
      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: <RN1FOFOA_ALV> TYPE RN1FOFOA_ALV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1FOFOA_ALV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1FOFOA_ALV
  INTO TABLE IT_RN1FOFOA_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1FOFOA_ALV
*  INTO TABLE @DATA(IT_RN1FOFOA_ALV2).
*--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_RN1FOFOA_ALV INDEX 1 INTO DATA(WA_RN1FOFOA_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1FOFOA_ALV ASSIGNING <RN1FOFOA_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1FOFOA_ALV>-DRUGNAME = 1.
<RN1FOFOA_ALV>-DESCR = 1.
<RN1FOFOA_ALV>-DRUGTYP_LIST = 1.
<RN1FOFOA_ALV>-MANDT = 1.
<RN1FOFOA_ALV>-GROUPDRUG = 1.

ENDLOOP.

LOOP AT IT_RN1FOFOA_ALV INTO WA_RN1FOFOA_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1FOFOA_ALV-INGDRUG, sy-vline,
  WA_RN1FOFOA_ALV-DRUGTYP, sy-vline,
  WA_RN1FOFOA_ALV-UNIT, sy-vline,
  WA_RN1FOFOA_ALV-QUANT, sy-vline,
  WA_RN1FOFOA_ALV-STUNIT, sy-vline,
  WA_RN1FOFOA_ALV-STRGTH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1FOFOA_ALV 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_RN1FOFOA_ALV 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_RN1FOFOA_ALV INTO WA_RN1FOFOA_ALV.


*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 CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RN1FOFOA_ALV-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1FOFOA_ALV-UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MEQUA, internal->external for field QUANT
CALL FUNCTION 'CONVERSION_EXIT_MEQUA_OUTPUT'
  EXPORTING
    input =                      WA_RN1FOFOA_ALV-QUANT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1FOFOA_ALV-QUANT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field STUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RN1FOFOA_ALV-STUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1FOFOA_ALV-STUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MEQUA, internal->external for field STRGTH
CALL FUNCTION 'CONVERSION_EXIT_MEQUA_OUTPUT'
  EXPORTING
    input =                      WA_RN1FOFOA_ALV-STRGTH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1FOFOA_ALV-STRGTH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field CALCUDU
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RN1FOFOA_ALV-CALCUDU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1FOFOA_ALV-CALCUDU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MEQUA, internal->external for field CMQUAN
CALL FUNCTION 'CONVERSION_EXIT_MEQUA_OUTPUT'
  EXPORTING
    input =                      WA_RN1FOFOA_ALV-CMQUAN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1FOFOA_ALV-CMQUAN.
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_RN1FOFOA_ALV_STR, 
DRUGNAME TYPE STRING,
DESCR TYPE STRING,
DRUGTYP_LIST TYPE STRING,
MANDT TYPE STRING,
GROUPDRUG TYPE STRING,
INGDRUG TYPE STRING,
DRUGTYP TYPE STRING,
UNIT TYPE STRING,
QUANT TYPE STRING,
STUNIT TYPE STRING,
STRGTH TYPE STRING,
CALCUD TYPE STRING,
CALCUDU TYPE STRING,
CMQUAN TYPE STRING,
DESTRGTH TYPE STRING,
QUANTEQREC TYPE STRING,
EQUIVQUAN TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPTIM TYPE STRING,
UPUSR TYPE STRING,
DRUGTYPE_HANDLE TYPE STRING,
UPDKZ TYPE STRING,
CELLTAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1FOFOA_ALV_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_RN1FOFOA_ALV_STR-DRUGNAME sy-vline 
WA_RN1FOFOA_ALV_STR-DESCR sy-vline 
WA_RN1FOFOA_ALV_STR-DRUGTYP_LIST sy-vline 
WA_RN1FOFOA_ALV_STR-MANDT sy-vline 
WA_RN1FOFOA_ALV_STR-GROUPDRUG sy-vline 
WA_RN1FOFOA_ALV_STR-INGDRUG sy-vline 
WA_RN1FOFOA_ALV_STR-DRUGTYP sy-vline 
WA_RN1FOFOA_ALV_STR-UNIT sy-vline 
WA_RN1FOFOA_ALV_STR-QUANT sy-vline 
WA_RN1FOFOA_ALV_STR-STUNIT sy-vline 
WA_RN1FOFOA_ALV_STR-STRGTH sy-vline 
WA_RN1FOFOA_ALV_STR-CALCUD sy-vline 
WA_RN1FOFOA_ALV_STR-CALCUDU sy-vline 
WA_RN1FOFOA_ALV_STR-CMQUAN sy-vline 
WA_RN1FOFOA_ALV_STR-DESTRGTH sy-vline 
WA_RN1FOFOA_ALV_STR-QUANTEQREC sy-vline 
WA_RN1FOFOA_ALV_STR-EQUIVQUAN sy-vline 
WA_RN1FOFOA_ALV_STR-ERDAT sy-vline 
WA_RN1FOFOA_ALV_STR-ERTIM sy-vline 
WA_RN1FOFOA_ALV_STR-ERUSR sy-vline 
WA_RN1FOFOA_ALV_STR-UPDAT sy-vline 
WA_RN1FOFOA_ALV_STR-UPTIM sy-vline 
WA_RN1FOFOA_ALV_STR-UPUSR sy-vline 
WA_RN1FOFOA_ALV_STR-DRUGTYPE_HANDLE sy-vline 
WA_RN1FOFOA_ALV_STR-UPDKZ sy-vline 
WA_RN1FOFOA_ALV_STR-CELLTAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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