ABAP Select data from SAP table RNGPA_CE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNGPA_CE
*  INTO TABLE @DATA(IT_RNGPA_CE2).
*--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_RNGPA_CE INDEX 1 INTO DATA(WA_RNGPA_CE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNGPA_CE>-INSTN = 1.
<RNGPA_CE>-NAME1 = 1.
<RNGPA_CE>-NAME2 = 1.
<RNGPA_CE>-NAME3 = 1.
<RNGPA_CE>-KNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNGPA_CE-NPKZ, sy-vline,
  WA_RNGPA_CE-SPRAS, sy-vline,
  WA_RNGPA_CE-ANRED, sy-vline,
  WA_RNGPA_CE-TITEL, sy-vline,
  WA_RNGPA_CE-NAMZU, sy-vline,
  WA_RNGPA_CE-VORSW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNGPA_CE 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_RNGPA_CE 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_RNGPA_CE INTO WA_RNGPA_CE.


*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 INSTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNGPA_CE-INSTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNGPA_CE-INSTN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RNGPA_CE-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNGPA_CE-SPRAS.
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_RNGPA_CE_STR, 
INSTN TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
KNAME TYPE STRING,
NPKZ TYPE STRING,
SPRAS TYPE STRING,
ANRED TYPE STRING,
TITEL TYPE STRING,
NAMZU TYPE STRING,
VORSW TYPE STRING,
GSCHL TYPE STRING,
SPVON TYPE STRING,
SPBIS TYPE STRING,
TITEL1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNGPA_CE_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_RNGPA_CE_STR-INSTN sy-vline 
WA_RNGPA_CE_STR-NAME1 sy-vline 
WA_RNGPA_CE_STR-NAME2 sy-vline 
WA_RNGPA_CE_STR-NAME3 sy-vline 
WA_RNGPA_CE_STR-KNAME sy-vline 
WA_RNGPA_CE_STR-NPKZ sy-vline 
WA_RNGPA_CE_STR-SPRAS sy-vline 
WA_RNGPA_CE_STR-ANRED sy-vline 
WA_RNGPA_CE_STR-TITEL sy-vline 
WA_RNGPA_CE_STR-NAMZU sy-vline 
WA_RNGPA_CE_STR-VORSW sy-vline 
WA_RNGPA_CE_STR-GSCHL sy-vline 
WA_RNGPA_CE_STR-SPVON sy-vline 
WA_RNGPA_CE_STR-SPBIS sy-vline 
WA_RNGPA_CE_STR-TITEL1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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