ABAP Select data from SAP table RNERP_FI_MM_MARM_RCV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNERP_FI_MM_MARM_RCV
*  INTO TABLE @DATA(IT_RNERP_FI_MM_MARM_RCV2).
*--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_RNERP_FI_MM_MARM_RCV INDEX 1 INTO DATA(WA_RNERP_FI_MM_MARM_RCV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNERP_FI_MM_MARM_RCV>-MATNR = 1.
<RNERP_FI_MM_MARM_RCV>-MEINH = 1.
<RNERP_FI_MM_MARM_RCV>-UMREZ = 1.
<RNERP_FI_MM_MARM_RCV>-UMREN = 1.
<RNERP_FI_MM_MARM_RCV>-EANNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNERP_FI_MM_MARM_RCV-EAN11, sy-vline,
  WA_RNERP_FI_MM_MARM_RCV-NUMTP, sy-vline,
  WA_RNERP_FI_MM_MARM_RCV-LAENG, sy-vline,
  WA_RNERP_FI_MM_MARM_RCV-BREIT, sy-vline,
  WA_RNERP_FI_MM_MARM_RCV-HOEHE, sy-vline,
  WA_RNERP_FI_MM_MARM_RCV-MEABM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNERP_FI_MM_MARM_RCV 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_RNERP_FI_MM_MARM_RCV 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_RNERP_FI_MM_MARM_RCV INTO WA_RNERP_FI_MM_MARM_RCV.


*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_RNERP_FI_MM_MARM_RCV_STR, 
MATNR TYPE STRING,
MEINH TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
EANNR TYPE STRING,
EAN11 TYPE STRING,
NUMTP TYPE STRING,
LAENG TYPE STRING,
BREIT TYPE STRING,
HOEHE TYPE STRING,
MEABM TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
BRGEW TYPE STRING,
GEWEI TYPE STRING,
MESUB TYPE STRING,
ATINN TYPE STRING,
MESRT TYPE STRING,
XFHDW TYPE STRING,
XBEWW TYPE STRING,
KZWSO TYPE STRING,
MSEHI TYPE STRING,
BFLME_MARM TYPE STRING,
GTIN_VARIANT TYPE STRING,
NEST_FTR TYPE STRING,
MAX_STACK TYPE STRING,
CAPAUSE TYPE STRING,
TY2TQ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNERP_FI_MM_MARM_RCV_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_RNERP_FI_MM_MARM_RCV_STR-MATNR sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-MEINH sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-UMREZ sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-UMREN sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-EANNR sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-EAN11 sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-NUMTP sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-LAENG sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-BREIT sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-HOEHE sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-MEABM sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-VOLUM sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-VOLEH sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-BRGEW sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-GEWEI sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-MESUB sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-ATINN sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-MESRT sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-XFHDW sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-XBEWW sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-KZWSO sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-MSEHI sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-BFLME_MARM sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-GTIN_VARIANT sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-NEST_FTR sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-MAX_STACK sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-CAPAUSE sy-vline 
WA_RNERP_FI_MM_MARM_RCV_STR-TY2TQ sy-vline      INTO ld_text SEPARATED BY SPACE.

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