ABAP Select data from SAP table /SAPAPO/RELH_OBJECT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/RELH_OBJECT 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 /SAPAPO/RELH_OBJECT. 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 /SAPAPO/RELH_OBJECT 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_/SAPAPO/RELH_OBJECT TYPE STANDARD TABLE OF /SAPAPO/RELH_OBJECT,
      WA_/SAPAPO/RELH_OBJECT TYPE /SAPAPO/RELH_OBJECT,
      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: </SAPAPO/RELH_OBJECT> TYPE /SAPAPO/RELH_OBJECT.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/RELH_OBJECT
  INTO TABLE IT_/SAPAPO/RELH_OBJECT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/RELH_OBJECT
*  INTO TABLE @DATA(IT_/SAPAPO/RELH_OBJECT2).
*--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_/SAPAPO/RELH_OBJECT INDEX 1 INTO DATA(WA_/SAPAPO/RELH_OBJECT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/RELH_OBJECT ASSIGNING </SAPAPO/RELH_OBJECT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/RELH_OBJECT>-OBJ_TYPE = 1.
</SAPAPO/RELH_OBJECT>-OBJ = 1.
</SAPAPO/RELH_OBJECT>-MODEL = 1.
</SAPAPO/RELH_OBJECT>-POBJ_TYPE = 1.
</SAPAPO/RELH_OBJECT>-POBJ = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/RELH_OBJECT INTO WA_/SAPAPO/RELH_OBJECT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/RELH_OBJECT-PMODEL, sy-vline,
  WA_/SAPAPO/RELH_OBJECT-XOBJID, sy-vline,
  WA_/SAPAPO/RELH_OBJECT-LVORM, sy-vline,
  WA_/SAPAPO/RELH_OBJECT-NOT_IN_MODEL_FLG, sy-vline,
  WA_/SAPAPO/RELH_OBJECT-EXPANDER, sy-vline,
  WA_/SAPAPO/RELH_OBJECT-DDHANDLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/RELH_OBJECT 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_/SAPAPO/RELH_OBJECT 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_/SAPAPO/RELH_OBJECT INTO WA_/SAPAPO/RELH_OBJECT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_/SAPAPO/RELH_OBJECT_STR, 
OBJ_TYPE TYPE STRING,
OBJ TYPE STRING,
MODEL TYPE STRING,
POBJ_TYPE TYPE STRING,
POBJ TYPE STRING,
PMODEL TYPE STRING,
XOBJID TYPE STRING,
LVORM TYPE STRING,
NOT_IN_MODEL_FLG TYPE STRING,
EXPANDER TYPE STRING,
DDHANDLE TYPE STRING,
DESCRS TYPE STRING,
DESCRL TYPE STRING,
DESCRS1 TYPE STRING,
DESCRL1 TYPE STRING,
DESCRS2 TYPE STRING,
DESCRL2 TYPE STRING,
SEQUENCE TYPE STRING,
GENERICFLD TYPE STRING,
RELATSHIP TYPE STRING,
RELLEVID TYPE STRING,
RELLEVNO TYPE STRING,
RELLEVT TYPE STRING,
POS TYPE STRING,
ALVTREEID TYPE STRING,
RELVCNODE TYPE STRING,
RELLDNODE TYPE STRING,
RELNODESEQ TYPE STRING,
RELAFSDS TYPE STRING,
RELAFSS TYPE STRING,
RELAHDD TYPE STRING,
RELAHRD TYPE STRING,
RELQUOTA TYPE STRING,
RELMULTF TYPE STRING,
RELINVISIBLE TYPE STRING,
VALFROM TYPE STRING,
PERIODID TYPE STRING,
DESCRS3 TYPE STRING,
DESCRL3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/RELH_OBJECT_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_/SAPAPO/RELH_OBJECT_STR-OBJ_TYPE sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-OBJ sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-MODEL sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-POBJ_TYPE sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-POBJ sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-PMODEL sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-XOBJID sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-LVORM sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-NOT_IN_MODEL_FLG sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-EXPANDER sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-DDHANDLE sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-DESCRS sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-DESCRL sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-DESCRS1 sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-DESCRL1 sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-DESCRS2 sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-DESCRL2 sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-SEQUENCE sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-GENERICFLD sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELATSHIP sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELLEVID sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELLEVNO sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELLEVT sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-POS sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-ALVTREEID sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELVCNODE sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELLDNODE sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELNODESEQ sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELAFSDS sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELAFSS sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELAHDD sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELAHRD sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELQUOTA sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELMULTF sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-RELINVISIBLE sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-VALFROM sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-PERIODID sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-DESCRS3 sy-vline 
WA_/SAPAPO/RELH_OBJECT_STR-DESCRL3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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