ABAP Select data from SAP table RELULBHDR_DI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RELULBHDR_DI
*  INTO TABLE @DATA(IT_RELULBHDR_DI2).
*--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_RELULBHDR_DI INDEX 1 INTO DATA(WA_RELULBHDR_DI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RELULBHDR_DI>-AKTYP = 1.
<RELULBHDR_DI>-RLTP1 = 1.
<RELULBHDR_DI>-RLTP2 = 1.
<RELULBHDR_DI>-RLTP3 = 1.
<RELULBHDR_DI>-RLTP4 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RELULBHDR_DI-RLTP5, sy-vline,
  WA_RELULBHDR_DI-RLTP6, sy-vline,
  WA_RELULBHDR_DI-RLTP7, sy-vline,
  WA_RELULBHDR_DI-RLTP8, sy-vline,
  WA_RELULBHDR_DI-RLTP9, sy-vline,
  WA_RELULBHDR_DI-COUNTRY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RELULBHDR_DI 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_RELULBHDR_DI 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_RELULBHDR_DI INTO WA_RELULBHDR_DI.


*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_RELULBHDR_DI_STR, 
AKTYP TYPE STRING,
RLTP1 TYPE STRING,
RLTP2 TYPE STRING,
RLTP3 TYPE STRING,
RLTP4 TYPE STRING,
RLTP5 TYPE STRING,
RLTP6 TYPE STRING,
RLTP7 TYPE STRING,
RLTP8 TYPE STRING,
RLTP9 TYPE STRING,
COUNTRY TYPE STRING,
STATE TYPE STRING,
DISTRICT TYPE STRING,
MUNICIPAL TYPE STRING,
LBCNO TYPE STRING,
PROCNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RELULBHDR_DI_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_RELULBHDR_DI_STR-AKTYP sy-vline 
WA_RELULBHDR_DI_STR-RLTP1 sy-vline 
WA_RELULBHDR_DI_STR-RLTP2 sy-vline 
WA_RELULBHDR_DI_STR-RLTP3 sy-vline 
WA_RELULBHDR_DI_STR-RLTP4 sy-vline 
WA_RELULBHDR_DI_STR-RLTP5 sy-vline 
WA_RELULBHDR_DI_STR-RLTP6 sy-vline 
WA_RELULBHDR_DI_STR-RLTP7 sy-vline 
WA_RELULBHDR_DI_STR-RLTP8 sy-vline 
WA_RELULBHDR_DI_STR-RLTP9 sy-vline 
WA_RELULBHDR_DI_STR-COUNTRY sy-vline 
WA_RELULBHDR_DI_STR-STATE sy-vline 
WA_RELULBHDR_DI_STR-DISTRICT sy-vline 
WA_RELULBHDR_DI_STR-MUNICIPAL sy-vline 
WA_RELULBHDR_DI_STR-LBCNO sy-vline 
WA_RELULBHDR_DI_STR-PROCNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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