ABAP Select data from SAP table HCMFAB_S_PERS_UI0021_42 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP HCMFAB_S_PERS_UI0021_42 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 HCMFAB_S_PERS_UI0021_42. 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 HCMFAB_S_PERS_UI0021_42 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_HCMFAB_S_PERS_UI0021_42 TYPE STANDARD TABLE OF HCMFAB_S_PERS_UI0021_42,
      WA_HCMFAB_S_PERS_UI0021_42 TYPE HCMFAB_S_PERS_UI0021_42,
      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: <HCMFAB_S_PERS_UI0021_42> TYPE HCMFAB_S_PERS_UI0021_42.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_HCMFAB_S_PERS_UI0021_42.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM HCMFAB_S_PERS_UI0021_42
  INTO TABLE IT_HCMFAB_S_PERS_UI0021_42.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HCMFAB_S_PERS_UI0021_42
*  INTO TABLE @DATA(IT_HCMFAB_S_PERS_UI0021_422).
*--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_HCMFAB_S_PERS_UI0021_42 INDEX 1 INTO DATA(WA_HCMFAB_S_PERS_UI0021_422).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_HCMFAB_S_PERS_UI0021_42 ASSIGNING <HCMFAB_S_PERS_UI0021_42>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HCMFAB_S_PERS_UI0021_42>-OBJECT_KEY = 1.
<HCMFAB_S_PERS_UI0021_42>-PERNR = 1.
<HCMFAB_S_PERS_UI0021_42>-AEDTM = 1.
<HCMFAB_S_PERS_UI0021_42>-UNAME = 1.
<HCMFAB_S_PERS_UI0021_42>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_HCMFAB_S_PERS_UI0021_42 INTO WA_HCMFAB_S_PERS_UI0021_42.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HCMFAB_S_PERS_UI0021_42-SPRTX, sy-vline,
  WA_HCMFAB_S_PERS_UI0021_42-ITBLD, sy-vline,
  WA_HCMFAB_S_PERS_UI0021_42-ITXEX, sy-vline,
  WA_HCMFAB_S_PERS_UI0021_42-BEGDA, sy-vline,
  WA_HCMFAB_S_PERS_UI0021_42-ENDDA, sy-vline,
  WA_HCMFAB_S_PERS_UI0021_42-FAMSA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HCMFAB_S_PERS_UI0021_42 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_HCMFAB_S_PERS_UI0021_42 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_HCMFAB_S_PERS_UI0021_42 INTO WA_HCMFAB_S_PERS_UI0021_42.


*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 PDATE, internal->external for field FGBDT
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_HCMFAB_S_PERS_UI0021_42-FGBDT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HCMFAB_S_PERS_UI0021_42-FGBDT.
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_HCMFAB_S_PERS_UI0021_42_STR, 
OBJECT_KEY TYPE STRING,
PERNR TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
SPRPS TYPE STRING,
SPRTX TYPE STRING,
ITBLD TYPE STRING,
ITXEX TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
FAMSA TYPE STRING,
STEXT TYPE STRING,
OBJPS TYPE STRING,
FANAM TYPE STRING,
FKNZN TYPE STRING,
FAVOR TYPE STRING,
PPNAM TYPE STRING,
CNNAM TYPE STRING,
FGBDT TYPE STRING,
TWYY1 TYPE STRING,
TWYY2 TYPE STRING,
TWMTH TYPE STRING,
TWDAY TYPE STRING,
FGBOT TYPE STRING,
FANAT TYPE STRING,
IDNUM TYPE STRING,
IDCHK TYPE STRING,
NHIFA TYPE STRING,
FAREL TYPE STRING,
NHIST TYPE STRING,
NHISR TYPE STRING,
NSRTX TYPE STRING,
NHIEX TYPE STRING,
EXRSN TYPE STRING,
EXRTX TYPE STRING,
DISAB TYPE STRING,
LISTR TYPE STRING,
PSTLZ TYPE STRING,
STATE TYPE STRING,
LAND1 TYPE STRING,
COUNC TYPE STRING,
BEZEI02 TYPE STRING,
VILLA TYPE STRING,
NEIGH TYPE STRING,
TOWN TYPE STRING,
ADRTW TYPE STRING,
TELNR TYPE STRING,
FASEX TYPE STRING,
VADAT TYPE STRING,
THMTH TYPE STRING,
BEZEI01 TYPE STRING,
SEXDE TYPE STRING,
GBDTW TYPE STRING,
TWINI TYPE STRING,
NATIO TYPE STRING,
IDCHKX TYPE STRING,
LANDX TYPE STRING,
THMTHX TYPE STRING,
FARTX TYPE STRING,
NSTTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HCMFAB_S_PERS_UI0021_42_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_HCMFAB_S_PERS_UI0021_42_STR-OBJECT_KEY sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-PERNR sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-AEDTM sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-UNAME sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-SPRPS sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-SPRTX sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-ITBLD sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-ITXEX sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-BEGDA sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-ENDDA sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-FAMSA sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-STEXT sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-OBJPS sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-FANAM sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-FKNZN sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-FAVOR sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-PPNAM sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-CNNAM sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-FGBDT sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-TWYY1 sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-TWYY2 sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-TWMTH sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-TWDAY sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-FGBOT sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-FANAT sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-IDNUM sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-IDCHK sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-NHIFA sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-FAREL sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-NHIST sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-NHISR sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-NSRTX sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-NHIEX sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-EXRSN sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-EXRTX sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-DISAB sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-LISTR sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-PSTLZ sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-STATE sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-LAND1 sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-COUNC sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-BEZEI02 sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-VILLA sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-NEIGH sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-TOWN sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-ADRTW sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-TELNR sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-FASEX sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-VADAT sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-THMTH sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-BEZEI01 sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-SEXDE sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-GBDTW sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-TWINI sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-NATIO sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-IDCHKX sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-LANDX sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-THMTHX sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-FARTX sy-vline 
WA_HCMFAB_S_PERS_UI0021_42_STR-NSTTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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