ABAP Select data from SAP table RM01A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RM01A 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 RM01A. 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 RM01A 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_RM01A TYPE STANDARD TABLE OF RM01A,
      WA_RM01A TYPE RM01A,
      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: <RM01A> TYPE RM01A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RM01A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RM01A
  INTO TABLE IT_RM01A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RM01A
*  INTO TABLE @DATA(IT_RM01A2).
*--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_RM01A INDEX 1 INTO DATA(WA_RM01A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RM01A ASSIGNING <RM01A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RM01A>-ABELP = 1.
<RM01A>-ABLNV = 1.
<RM01A>-ABLNB = 1.
<RM01A>-ABLPV = 1.
<RM01A>-ABLPB = 1.

ENDLOOP.

LOOP AT IT_RM01A INTO WA_RM01A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RM01A-EKORG, sy-vline,
  WA_RM01A-EKGRP, sy-vline,
  WA_RM01A-BELPO, sy-vline,
  WA_RM01A-REFBS, sy-vline,
  WA_RM01A-REFPV, sy-vline,
  WA_RM01A-REFPB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RM01A 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_RM01A 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_RM01A INTO WA_RM01A.


*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 ABLNV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM01A-ABLNV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM01A-ABLNV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABLNB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM01A-ABLNB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM01A-ABLNB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFBS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM01A-REFBS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM01A-REFBS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RFBST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM01A-RFBST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM01A-RFBST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RFAKT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM01A-RFAKT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM01A-RFAKT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RFKTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RM01A-RFKTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM01A-RFKTN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RM01A-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM01A-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field AUFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RM01A-AUFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM01A-AUFME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RM01A-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RM01A-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_RM01A_STR, 
ABELP TYPE STRING,
ABLNV TYPE STRING,
ABLNB TYPE STRING,
ABLPV TYPE STRING,
ABLPB TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
BELPO TYPE STRING,
REFBS TYPE STRING,
REFPV TYPE STRING,
REFPB TYPE STRING,
REFPS TYPE STRING,
REFBA TYPE STRING,
REFDT TYPE STRING,
REFMG TYPE STRING,
RFBST TYPE STRING,
RFBPO TYPE STRING,
RFBPV TYPE STRING,
RFBPB TYPE STRING,
RFAKT TYPE STRING,
RFKTN TYPE STRING,
RFKTP TYPE STRING,
KTRPV TYPE STRING,
KTRPB TYPE STRING,
AUFAR TYPE STRING,
APSTP TYPE STRING,
LISTG TYPE STRING,
RUNDG TYPE STRING,
RESTV TYPE STRING,
PMNGE TYPE STRING,
AMNGE TYPE STRING,
IMNGE TYPE STRING,
MMNGE TYPE STRING,
HMNGE TYPE STRING,
MEINS TYPE STRING,
AUFME TYPE STRING,
SELKZ TYPE STRING,
EINTE TYPE STRING,
ETMNG TYPE STRING,
LPEIN TYPE STRING,
EEIND TYPE STRING,
PSTYP TYPE STRING,
KNTTP TYPE STRING,
ASTAK TYPE STRING,
AKTST TYPE STRING,
ASTAP TYPE STRING,
PFLST TYPE STRING,
BEDAT TYPE STRING,
VEDAT TYPE STRING,
BSART TYPE STRING,
EVART TYPE STRING,
SPRAS TYPE STRING,
AFDAT TYPE STRING,
AFDTP TYPE STRING,
FBDAT TYPE STRING,
FBDTP TYPE STRING,
FLDAT TYPE STRING,
FLDTP TYPE STRING,
FUDAT TYPE STRING,
FUDTP TYPE STRING,
WEFDT TYPE STRING,
WEFTP TYPE STRING,
WEVDT TYPE STRING,
WEVTP TYPE STRING,
VKDAT TYPE STRING,
VKDTP TYPE STRING,
DATYP TYPE STRING,
WEDAT TYPE STRING,
WETYP TYPE STRING,
WEPRZ TYPE STRING,
WEUZT TYPE STRING,
LIEFW TYPE STRING,
TEXT1 TYPE STRING,
FORM1 TYPE STRING,
FORM2 TYPE STRING,
LTXT1 TYPE STRING,
LTXT2 TYPE STRING,
KZLTX TYPE STRING,
FIXIE TYPE STRING,
EBELP TYPE STRING,
OLDZL TYPE STRING,
FILKB TYPE STRING,
WEPMG TYPE STRING,
WEIMG TYPE STRING,
WAERS TYPE STRING,
ASTRA TYPE STRING,
KMEHR TYPE STRING,
ICONE TYPE STRING,
AAVIT TYPE STRING,
RETPO TYPE STRING,
BERMIMA TYPE STRING,
SA_VERF TYPE STRING,
SA_MATNAUT TYPE STRING,
WVTYP TYPE STRING,
WVDAT TYPE STRING,
WVUZT TYPE STRING,
ICON_VZ_LFW TYPE STRING,
KMEHR_VZ TYPE STRING,
NREMFIN TYPE STRING,
WRF_AT_REF_APC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RM01A_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_RM01A_STR-ABELP sy-vline 
WA_RM01A_STR-ABLNV sy-vline 
WA_RM01A_STR-ABLNB sy-vline 
WA_RM01A_STR-ABLPV sy-vline 
WA_RM01A_STR-ABLPB sy-vline 
WA_RM01A_STR-EKORG sy-vline 
WA_RM01A_STR-EKGRP sy-vline 
WA_RM01A_STR-BELPO sy-vline 
WA_RM01A_STR-REFBS sy-vline 
WA_RM01A_STR-REFPV sy-vline 
WA_RM01A_STR-REFPB sy-vline 
WA_RM01A_STR-REFPS sy-vline 
WA_RM01A_STR-REFBA sy-vline 
WA_RM01A_STR-REFDT sy-vline 
WA_RM01A_STR-REFMG sy-vline 
WA_RM01A_STR-RFBST sy-vline 
WA_RM01A_STR-RFBPO sy-vline 
WA_RM01A_STR-RFBPV sy-vline 
WA_RM01A_STR-RFBPB sy-vline 
WA_RM01A_STR-RFAKT sy-vline 
WA_RM01A_STR-RFKTN sy-vline 
WA_RM01A_STR-RFKTP sy-vline 
WA_RM01A_STR-KTRPV sy-vline 
WA_RM01A_STR-KTRPB sy-vline 
WA_RM01A_STR-AUFAR sy-vline 
WA_RM01A_STR-APSTP sy-vline 
WA_RM01A_STR-LISTG sy-vline 
WA_RM01A_STR-RUNDG sy-vline 
WA_RM01A_STR-RESTV sy-vline 
WA_RM01A_STR-PMNGE sy-vline 
WA_RM01A_STR-AMNGE sy-vline 
WA_RM01A_STR-IMNGE sy-vline 
WA_RM01A_STR-MMNGE sy-vline 
WA_RM01A_STR-HMNGE sy-vline 
WA_RM01A_STR-MEINS sy-vline 
WA_RM01A_STR-AUFME sy-vline 
WA_RM01A_STR-SELKZ sy-vline 
WA_RM01A_STR-EINTE sy-vline 
WA_RM01A_STR-ETMNG sy-vline 
WA_RM01A_STR-LPEIN sy-vline 
WA_RM01A_STR-EEIND sy-vline 
WA_RM01A_STR-PSTYP sy-vline 
WA_RM01A_STR-KNTTP sy-vline 
WA_RM01A_STR-ASTAK sy-vline 
WA_RM01A_STR-AKTST sy-vline 
WA_RM01A_STR-ASTAP sy-vline 
WA_RM01A_STR-PFLST sy-vline 
WA_RM01A_STR-BEDAT sy-vline 
WA_RM01A_STR-VEDAT sy-vline 
WA_RM01A_STR-BSART sy-vline 
WA_RM01A_STR-EVART sy-vline 
WA_RM01A_STR-SPRAS sy-vline 
WA_RM01A_STR-AFDAT sy-vline 
WA_RM01A_STR-AFDTP sy-vline 
WA_RM01A_STR-FBDAT sy-vline 
WA_RM01A_STR-FBDTP sy-vline 
WA_RM01A_STR-FLDAT sy-vline 
WA_RM01A_STR-FLDTP sy-vline 
WA_RM01A_STR-FUDAT sy-vline 
WA_RM01A_STR-FUDTP sy-vline 
WA_RM01A_STR-WEFDT sy-vline 
WA_RM01A_STR-WEFTP sy-vline 
WA_RM01A_STR-WEVDT sy-vline 
WA_RM01A_STR-WEVTP sy-vline 
WA_RM01A_STR-VKDAT sy-vline 
WA_RM01A_STR-VKDTP sy-vline 
WA_RM01A_STR-DATYP sy-vline 
WA_RM01A_STR-WEDAT sy-vline 
WA_RM01A_STR-WETYP sy-vline 
WA_RM01A_STR-WEPRZ sy-vline 
WA_RM01A_STR-WEUZT sy-vline 
WA_RM01A_STR-LIEFW sy-vline 
WA_RM01A_STR-TEXT1 sy-vline 
WA_RM01A_STR-FORM1 sy-vline 
WA_RM01A_STR-FORM2 sy-vline 
WA_RM01A_STR-LTXT1 sy-vline 
WA_RM01A_STR-LTXT2 sy-vline 
WA_RM01A_STR-KZLTX sy-vline 
WA_RM01A_STR-FIXIE sy-vline 
WA_RM01A_STR-EBELP sy-vline 
WA_RM01A_STR-OLDZL sy-vline 
WA_RM01A_STR-FILKB sy-vline 
WA_RM01A_STR-WEPMG sy-vline 
WA_RM01A_STR-WEIMG sy-vline 
WA_RM01A_STR-WAERS sy-vline 
WA_RM01A_STR-ASTRA sy-vline 
WA_RM01A_STR-KMEHR sy-vline 
WA_RM01A_STR-ICONE sy-vline 
WA_RM01A_STR-AAVIT sy-vline 
WA_RM01A_STR-RETPO sy-vline 
WA_RM01A_STR-BERMIMA sy-vline 
WA_RM01A_STR-SA_VERF sy-vline 
WA_RM01A_STR-SA_MATNAUT sy-vline 
WA_RM01A_STR-WVTYP sy-vline 
WA_RM01A_STR-WVDAT sy-vline 
WA_RM01A_STR-WVUZT sy-vline 
WA_RM01A_STR-ICON_VZ_LFW sy-vline 
WA_RM01A_STR-KMEHR_VZ sy-vline 
WA_RM01A_STR-NREMFIN sy-vline 
WA_RM01A_STR-WRF_AT_REF_APC sy-vline      INTO ld_text SEPARATED BY SPACE.

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