ABAP Select data from SAP table HAPCN_S_OBJ_LIB_LIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HAPCN_S_OBJ_LIB_LIST
*  INTO TABLE @DATA(IT_HAPCN_S_OBJ_LIB_LIST2).
*--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_HAPCN_S_OBJ_LIB_LIST INDEX 1 INTO DATA(WA_HAPCN_S_OBJ_LIB_LIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HAPCN_S_OBJ_LIB_LIST>-PLVAR = 1.
<HAPCN_S_OBJ_LIB_LIST>-OTYPE = 1.
<HAPCN_S_OBJ_LIB_LIST>-OBJID = 1.
<HAPCN_S_OBJ_LIB_LIST>-SHORT = 1.
<HAPCN_S_OBJ_LIB_LIST>-STEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HAPCN_S_OBJ_LIB_LIST-LANGU, sy-vline,
  WA_HAPCN_S_OBJ_LIB_LIST-BEGDA, sy-vline,
  WA_HAPCN_S_OBJ_LIB_LIST-ENDDA, sy-vline,
  WA_HAPCN_S_OBJ_LIB_LIST-ISTAT, sy-vline,
  WA_HAPCN_S_OBJ_LIB_LIST-VCOUNT, sy-vline,
  WA_HAPCN_S_OBJ_LIB_LIST-LEVEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HAPCN_S_OBJ_LIB_LIST 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_HAPCN_S_OBJ_LIB_LIST 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_HAPCN_S_OBJ_LIB_LIST INTO WA_HAPCN_S_OBJ_LIB_LIST.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_HAPCN_S_OBJ_LIB_LIST-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HAPCN_S_OBJ_LIB_LIST-LANGU.
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_HAPCN_S_OBJ_LIB_LIST_STR, 
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
SHORT TYPE STRING,
STEXT TYPE STRING,
LANGU TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
ISTAT TYPE STRING,
VCOUNT TYPE STRING,
LEVEL TYPE STRING,
PUP_OTYPE TYPE STRING,
PUP_OBJID TYPE STRING,
PUP_STEXT TYPE STRING,
SOURCE_ID TYPE STRING,
SOURCE_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HAPCN_S_OBJ_LIB_LIST_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_HAPCN_S_OBJ_LIB_LIST_STR-PLVAR sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-OTYPE sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-OBJID sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-SHORT sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-STEXT sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-LANGU sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-BEGDA sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-ENDDA sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-ISTAT sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-VCOUNT sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-LEVEL sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-PUP_OTYPE sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-PUP_OBJID sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-PUP_STEXT sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-SOURCE_ID sy-vline 
WA_HAPCN_S_OBJ_LIB_LIST_STR-SOURCE_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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