ABAP Select data from SAP table RNEHCE111 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNEHCE111 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 RNEHCE111. 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 RNEHCE111 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_RNEHCE111 TYPE STANDARD TABLE OF RNEHCE111,
      WA_RNEHCE111 TYPE RNEHCE111,
      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: <RNEHCE111> TYPE RNEHCE111.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNEHCE111.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNEHCE111
  INTO TABLE IT_RNEHCE111.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNEHCE111
*  INTO TABLE @DATA(IT_RNEHCE1112).
*--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_RNEHCE111 INDEX 1 INTO DATA(WA_RNEHCE1112).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNEHCE111 ASSIGNING <RNEHCE111>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNEHCE111>-LNCRD = 1.
<RNEHCE111>-CRDTYPE = 1.
<RNEHCE111>-EXT_KEY1 = 1.
<RNEHCE111>-EXT_KEY2 = 1.
<RNEHCE111>-PATNR = 1.

ENDLOOP.

LOOP AT IT_RNEHCE111 INTO WA_RNEHCE111.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNEHCE111-STORN_NEHC, sy-vline,
  WA_RNEHCE111-LNCRD_E111, sy-vline,
  WA_RNEHCE111-DOCTYPE, sy-vline,
  WA_RNEHCE111-STCODE, sy-vline,
  WA_RNEHCE111-NNAME, sy-vline,
  WA_RNEHCE111-VNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNEHCE111 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_RNEHCE111 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_RNEHCE111 INTO WA_RNEHCE111.


*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 ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNEHCE111-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNEHCE111-PATNR.
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_RNEHCE111_STR, 
LNCRD TYPE STRING,
CRDTYPE TYPE STRING,
EXT_KEY1 TYPE STRING,
EXT_KEY2 TYPE STRING,
PATNR TYPE STRING,
STORN_NEHC TYPE STRING,
LNCRD_E111 TYPE STRING,
DOCTYPE TYPE STRING,
STCODE TYPE STRING,
NNAME TYPE STRING,
VNAME TYPE STRING,
GBDAT TYPE STRING,
PERSID TYPE STRING,
INSTNR TYPE STRING,
ACNYM TYPE STRING,
CARDNR TYPE STRING,
EXPDT TYPE STRING,
STORN_E111 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNEHCE111_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_RNEHCE111_STR-LNCRD sy-vline 
WA_RNEHCE111_STR-CRDTYPE sy-vline 
WA_RNEHCE111_STR-EXT_KEY1 sy-vline 
WA_RNEHCE111_STR-EXT_KEY2 sy-vline 
WA_RNEHCE111_STR-PATNR sy-vline 
WA_RNEHCE111_STR-STORN_NEHC sy-vline 
WA_RNEHCE111_STR-LNCRD_E111 sy-vline 
WA_RNEHCE111_STR-DOCTYPE sy-vline 
WA_RNEHCE111_STR-STCODE sy-vline 
WA_RNEHCE111_STR-NNAME sy-vline 
WA_RNEHCE111_STR-VNAME sy-vline 
WA_RNEHCE111_STR-GBDAT sy-vline 
WA_RNEHCE111_STR-PERSID sy-vline 
WA_RNEHCE111_STR-INSTNR sy-vline 
WA_RNEHCE111_STR-ACNYM sy-vline 
WA_RNEHCE111_STR-CARDNR sy-vline 
WA_RNEHCE111_STR-EXPDT sy-vline 
WA_RNEHCE111_STR-STORN_E111 sy-vline      INTO ld_text SEPARATED BY SPACE.

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