ABAP Select data from SAP table IFMFGRCN_LOAD_ADD_FIELDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IFMFGRCN_LOAD_ADD_FIELDS
*  INTO TABLE @DATA(IT_IFMFGRCN_LOAD_ADD_FIELDS2).
*--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_IFMFGRCN_LOAD_ADD_FIELDS INDEX 1 INTO DATA(WA_IFMFGRCN_LOAD_ADD_FIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IFMFGRCN_LOAD_ADD_FIELDS>-RYEAR = 1.
<IFMFGRCN_LOAD_ADD_FIELDS>-RPMAX = 1.
<IFMFGRCN_LOAD_ADD_FIELDS>-HSLVT = 1.
<IFMFGRCN_LOAD_ADD_FIELDS>-HSL01 = 1.
<IFMFGRCN_LOAD_ADD_FIELDS>-HSL02 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IFMFGRCN_LOAD_ADD_FIELDS-HSL03, sy-vline,
  WA_IFMFGRCN_LOAD_ADD_FIELDS-HSL04, sy-vline,
  WA_IFMFGRCN_LOAD_ADD_FIELDS-HSL05, sy-vline,
  WA_IFMFGRCN_LOAD_ADD_FIELDS-HSL06, sy-vline,
  WA_IFMFGRCN_LOAD_ADD_FIELDS-HSL07, sy-vline,
  WA_IFMFGRCN_LOAD_ADD_FIELDS-HSL08, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IFMFGRCN_LOAD_ADD_FIELDS 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_IFMFGRCN_LOAD_ADD_FIELDS 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_IFMFGRCN_LOAD_ADD_FIELDS INTO WA_IFMFGRCN_LOAD_ADD_FIELDS.


*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 GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_IFMFGRCN_LOAD_ADD_FIELDS-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFMFGRCN_LOAD_ADD_FIELDS-RYEAR.
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_IFMFGRCN_LOAD_ADD_FIELDS_STR, 
RYEAR TYPE STRING,
RPMAX TYPE STRING,
HSLVT TYPE STRING,
HSL01 TYPE STRING,
HSL02 TYPE STRING,
HSL03 TYPE STRING,
HSL04 TYPE STRING,
HSL05 TYPE STRING,
HSL06 TYPE STRING,
HSL07 TYPE STRING,
HSL08 TYPE STRING,
HSL09 TYPE STRING,
HSL10 TYPE STRING,
HSL11 TYPE STRING,
HSL12 TYPE STRING,
HSL13 TYPE STRING,
HSL14 TYPE STRING,
HSL15 TYPE STRING,
HSL16 TYPE STRING,
MAXVT TYPE STRING,
MAX01 TYPE STRING,
MAX02 TYPE STRING,
MAX03 TYPE STRING,
MAX04 TYPE STRING,
MAX05 TYPE STRING,
MAX06 TYPE STRING,
MAX07 TYPE STRING,
MAX08 TYPE STRING,
MAX09 TYPE STRING,
MAX10 TYPE STRING,
MAX11 TYPE STRING,
MAX12 TYPE STRING,
MAX13 TYPE STRING,
MAX14 TYPE STRING,
MAX15 TYPE STRING,
MAX16 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IFMFGRCN_LOAD_ADD_FIELDS_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_IFMFGRCN_LOAD_ADD_FIELDS_STR-RYEAR sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-RPMAX sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSLVT sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL01 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL02 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL03 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL04 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL05 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL06 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL07 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL08 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL09 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL10 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL11 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL12 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL13 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL14 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL15 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-HSL16 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAXVT sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX01 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX02 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX03 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX04 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX05 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX06 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX07 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX08 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX09 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX10 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX11 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX12 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX13 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX14 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX15 sy-vline 
WA_IFMFGRCN_LOAD_ADD_FIELDS_STR-MAX16 sy-vline      INTO ld_text SEPARATED BY SPACE.

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