ABAP Select data from SAP table FMHED_S_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMHED_S_HEADER
*  INTO TABLE @DATA(IT_FMHED_S_HEADER2).
*--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_FMHED_S_HEADER INDEX 1 INTO DATA(WA_FMHED_S_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMHED_S_HEADER>-DOCYEAR = 1.
<FMHED_S_HEADER>-VERSION = 1.
<FMHED_S_HEADER>-PROCESS_UI = 1.
<FMHED_S_HEADER>-EXT_DOCNR = 1.
<FMHED_S_HEADER>-CRTDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMHED_S_HEADER-CRTTIME, sy-vline,
  WA_FMHED_S_HEADER-DOCDATE, sy-vline,
  WA_FMHED_S_HEADER-POSTDATE, sy-vline,
  WA_FMHED_S_HEADER-HELD_STATE, sy-vline,
  WA_FMHED_S_HEADER-RESPPERS, sy-vline,
  WA_FMHED_S_HEADER-TEXT50, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMHED_S_HEADER 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_FMHED_S_HEADER 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_FMHED_S_HEADER INTO WA_FMHED_S_HEADER.


*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 DOCYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FMHED_S_HEADER-DOCYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMHED_S_HEADER-DOCYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field DOCFAM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMHED_S_HEADER-DOCFAM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMHED_S_HEADER-DOCFAM.
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_FMHED_S_HEADER_STR, 
DOCYEAR TYPE STRING,
VERSION TYPE STRING,
PROCESS_UI TYPE STRING,
EXT_DOCNR TYPE STRING,
CRTDATE TYPE STRING,
CRTTIME TYPE STRING,
DOCDATE TYPE STRING,
POSTDATE TYPE STRING,
HELD_STATE TYPE STRING,
RESPPERS TYPE STRING,
TEXT50 TYPE STRING,
TEXTNAME TYPE STRING,
LTXT_IND TYPE STRING,
DOCTYPE TYPE STRING,
LAYOUTVAR TYPE STRING,
LOGSYS TYPE STRING,
COHORT TYPE STRING,
PUBLAW TYPE STRING,
LEGIS TYPE STRING,
AWORG TYPE STRING,
AWREF TYPE STRING,
AWSYS TYPE STRING,
AWTYP TYPE STRING,
TECHORG TYPE STRING,
SUPL_FIELD TYPE STRING,
TRANSFER_AGENCY TYPE STRING,
TRANSFER_ACCOUNT TYPE STRING,
RCOMP TYPE STRING,
DOCFAM TYPE STRING,
FMFGUS_KEY TYPE STRING,
DUMMY_BCS_DOC_EXT TYPE STRING,
PFM_FOA TYPE STRING,
PFM_SPEC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMHED_S_HEADER_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_FMHED_S_HEADER_STR-DOCYEAR sy-vline 
WA_FMHED_S_HEADER_STR-VERSION sy-vline 
WA_FMHED_S_HEADER_STR-PROCESS_UI sy-vline 
WA_FMHED_S_HEADER_STR-EXT_DOCNR sy-vline 
WA_FMHED_S_HEADER_STR-CRTDATE sy-vline 
WA_FMHED_S_HEADER_STR-CRTTIME sy-vline 
WA_FMHED_S_HEADER_STR-DOCDATE sy-vline 
WA_FMHED_S_HEADER_STR-POSTDATE sy-vline 
WA_FMHED_S_HEADER_STR-HELD_STATE sy-vline 
WA_FMHED_S_HEADER_STR-RESPPERS sy-vline 
WA_FMHED_S_HEADER_STR-TEXT50 sy-vline 
WA_FMHED_S_HEADER_STR-TEXTNAME sy-vline 
WA_FMHED_S_HEADER_STR-LTXT_IND sy-vline 
WA_FMHED_S_HEADER_STR-DOCTYPE sy-vline 
WA_FMHED_S_HEADER_STR-LAYOUTVAR sy-vline 
WA_FMHED_S_HEADER_STR-LOGSYS sy-vline 
WA_FMHED_S_HEADER_STR-COHORT sy-vline 
WA_FMHED_S_HEADER_STR-PUBLAW sy-vline 
WA_FMHED_S_HEADER_STR-LEGIS sy-vline 
WA_FMHED_S_HEADER_STR-AWORG sy-vline 
WA_FMHED_S_HEADER_STR-AWREF sy-vline 
WA_FMHED_S_HEADER_STR-AWSYS sy-vline 
WA_FMHED_S_HEADER_STR-AWTYP sy-vline 
WA_FMHED_S_HEADER_STR-TECHORG sy-vline 
WA_FMHED_S_HEADER_STR-SUPL_FIELD sy-vline 
WA_FMHED_S_HEADER_STR-TRANSFER_AGENCY sy-vline 
WA_FMHED_S_HEADER_STR-TRANSFER_ACCOUNT sy-vline 
WA_FMHED_S_HEADER_STR-RCOMP sy-vline 
WA_FMHED_S_HEADER_STR-DOCFAM sy-vline 
WA_FMHED_S_HEADER_STR-FMFGUS_KEY sy-vline 
WA_FMHED_S_HEADER_STR-DUMMY_BCS_DOC_EXT sy-vline 
WA_FMHED_S_HEADER_STR-PFM_FOA sy-vline 
WA_FMHED_S_HEADER_STR-PFM_SPEC sy-vline      INTO ld_text SEPARATED BY SPACE.

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