ABAP Select data from SAP table RN1REQX into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1REQX 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 RN1REQX. 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 RN1REQX 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_RN1REQX TYPE STANDARD TABLE OF RN1REQX,
      WA_RN1REQX TYPE RN1REQX,
      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: <RN1REQX> TYPE RN1REQX.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1REQX.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1REQX
  INTO TABLE IT_RN1REQX.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1REQX
*  INTO TABLE @DATA(IT_RN1REQX2).
*--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_RN1REQX INDEX 1 INTO DATA(WA_RN1REQX2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1REQX ASSIGNING <RN1REQX>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1REQX>-MANDT = 1.
<RN1REQX>-EINRI = 1.
<RN1REQX>-ANFID = 1.
<RN1REQX>-ORGID = 1.
<RN1REQX>-ORGID_X = 1.

ENDLOOP.

LOOP AT IT_RN1REQX INTO WA_RN1REQX.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1REQX-ANFOE, sy-vline,
  WA_RN1REQX-ANFOE_X, sy-vline,
  WA_RN1REQX-ANPOE, sy-vline,
  WA_RN1REQX-ANPOE_X, sy-vline,
  WA_RN1REQX-ANFTY, sy-vline,
  WA_RN1REQX-ANFTY_X, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1REQX 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_RN1REQX 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_RN1REQX INTO WA_RN1REQX.


*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 EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1REQX-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1REQX-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1REQX-ORGID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1REQX-ORGID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANFOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1REQX-ANFOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1REQX-ANFOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANPOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1REQX-ANPOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1REQX-ANPOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1REQX-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1REQX-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALDIA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1REQX-FALDIA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1REQX-FALDIA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1REQX-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1REQX-DOKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1REQX-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1REQX-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGFD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1REQX-ORGFD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1REQX-ORGFD.
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_RN1REQX_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
ANFID TYPE STRING,
ORGID TYPE STRING,
ORGID_X TYPE STRING,
ANFOE TYPE STRING,
ANFOE_X TYPE STRING,
ANPOE TYPE STRING,
ANPOE_X TYPE STRING,
ANFTY TYPE STRING,
ANFTY_X TYPE STRING,
ANFNR TYPE STRING,
ANFNR_X TYPE STRING,
FALNR TYPE STRING,
FALNR_X TYPE STRING,
ANSTAE TYPE STRING,
ANSTAE_X TYPE STRING,
APRI TYPE STRING,
APRI_X TYPE STRING,
KANAM TYPE STRING,
KANAM_X TYPE STRING,
KALTX TYPE STRING,
KALTX_X TYPE STRING,
FALDIA TYPE STRING,
FALDIA_X TYPE STRING,
LFDDIA TYPE STRING,
LFDDIA_X TYPE STRING,
FRAGE TYPE STRING,
FRAGE_X TYPE STRING,
FRLTX TYPE STRING,
FRLTX_X TYPE STRING,
SCHWKZ TYPE STRING,
SCHWKZ_X TYPE STRING,
SCHWO TYPE STRING,
SCHWO_X TYPE STRING,
LFDMEHR TYPE STRING,
LFDMEHR_X TYPE STRING,
TPAE TYPE STRING,
TPAE_X TYPE STRING,
RCKRUF TYPE STRING,
RCKRUF_X TYPE STRING,
DOKAR TYPE STRING,
DOKAR_X TYPE STRING,
DOKNR TYPE STRING,
DOKNR_X TYPE STRING,
DOKVR TYPE STRING,
DOKVR_X TYPE STRING,
DOKTL TYPE STRING,
DOKTL_X TYPE STRING,
BHANF TYPE STRING,
BHANF_X TYPE STRING,
BHATX TYPE STRING,
BHATX_X TYPE STRING,
PATNR TYPE STRING,
PATNR_X TYPE STRING,
DITXT TYPE STRING,
DITXT_X TYPE STRING,
DILTX TYPE STRING,
DILTX_X TYPE STRING,
VBUND TYPE STRING,
VBUND_X TYPE STRING,
MI TYPE STRING,
MI_X TYPE STRING,
SM TYPE STRING,
SM_X TYPE STRING,
KM TYPE STRING,
KM_X TYPE STRING,
JOD TYPE STRING,
JOD_X TYPE STRING,
ANDERE TYPE STRING,
ANDERE_X TYPE STRING,
KGR TYPE STRING,
KGR_X TYPE STRING,
KGEW TYPE STRING,
KGEW_X TYPE STRING,
RP TYPE STRING,
RP_X TYPE STRING,
RPID TYPE STRING,
RPID_X TYPE STRING,
ORGFD TYPE STRING,
ORGFD_X TYPE STRING,
MODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1REQX_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_RN1REQX_STR-MANDT sy-vline 
WA_RN1REQX_STR-EINRI sy-vline 
WA_RN1REQX_STR-ANFID sy-vline 
WA_RN1REQX_STR-ORGID sy-vline 
WA_RN1REQX_STR-ORGID_X sy-vline 
WA_RN1REQX_STR-ANFOE sy-vline 
WA_RN1REQX_STR-ANFOE_X sy-vline 
WA_RN1REQX_STR-ANPOE sy-vline 
WA_RN1REQX_STR-ANPOE_X sy-vline 
WA_RN1REQX_STR-ANFTY sy-vline 
WA_RN1REQX_STR-ANFTY_X sy-vline 
WA_RN1REQX_STR-ANFNR sy-vline 
WA_RN1REQX_STR-ANFNR_X sy-vline 
WA_RN1REQX_STR-FALNR sy-vline 
WA_RN1REQX_STR-FALNR_X sy-vline 
WA_RN1REQX_STR-ANSTAE sy-vline 
WA_RN1REQX_STR-ANSTAE_X sy-vline 
WA_RN1REQX_STR-APRI sy-vline 
WA_RN1REQX_STR-APRI_X sy-vline 
WA_RN1REQX_STR-KANAM sy-vline 
WA_RN1REQX_STR-KANAM_X sy-vline 
WA_RN1REQX_STR-KALTX sy-vline 
WA_RN1REQX_STR-KALTX_X sy-vline 
WA_RN1REQX_STR-FALDIA sy-vline 
WA_RN1REQX_STR-FALDIA_X sy-vline 
WA_RN1REQX_STR-LFDDIA sy-vline 
WA_RN1REQX_STR-LFDDIA_X sy-vline 
WA_RN1REQX_STR-FRAGE sy-vline 
WA_RN1REQX_STR-FRAGE_X sy-vline 
WA_RN1REQX_STR-FRLTX sy-vline 
WA_RN1REQX_STR-FRLTX_X sy-vline 
WA_RN1REQX_STR-SCHWKZ sy-vline 
WA_RN1REQX_STR-SCHWKZ_X sy-vline 
WA_RN1REQX_STR-SCHWO sy-vline 
WA_RN1REQX_STR-SCHWO_X sy-vline 
WA_RN1REQX_STR-LFDMEHR sy-vline 
WA_RN1REQX_STR-LFDMEHR_X sy-vline 
WA_RN1REQX_STR-TPAE sy-vline 
WA_RN1REQX_STR-TPAE_X sy-vline 
WA_RN1REQX_STR-RCKRUF sy-vline 
WA_RN1REQX_STR-RCKRUF_X sy-vline 
WA_RN1REQX_STR-DOKAR sy-vline 
WA_RN1REQX_STR-DOKAR_X sy-vline 
WA_RN1REQX_STR-DOKNR sy-vline 
WA_RN1REQX_STR-DOKNR_X sy-vline 
WA_RN1REQX_STR-DOKVR sy-vline 
WA_RN1REQX_STR-DOKVR_X sy-vline 
WA_RN1REQX_STR-DOKTL sy-vline 
WA_RN1REQX_STR-DOKTL_X sy-vline 
WA_RN1REQX_STR-BHANF sy-vline 
WA_RN1REQX_STR-BHANF_X sy-vline 
WA_RN1REQX_STR-BHATX sy-vline 
WA_RN1REQX_STR-BHATX_X sy-vline 
WA_RN1REQX_STR-PATNR sy-vline 
WA_RN1REQX_STR-PATNR_X sy-vline 
WA_RN1REQX_STR-DITXT sy-vline 
WA_RN1REQX_STR-DITXT_X sy-vline 
WA_RN1REQX_STR-DILTX sy-vline 
WA_RN1REQX_STR-DILTX_X sy-vline 
WA_RN1REQX_STR-VBUND sy-vline 
WA_RN1REQX_STR-VBUND_X sy-vline 
WA_RN1REQX_STR-MI sy-vline 
WA_RN1REQX_STR-MI_X sy-vline 
WA_RN1REQX_STR-SM sy-vline 
WA_RN1REQX_STR-SM_X sy-vline 
WA_RN1REQX_STR-KM sy-vline 
WA_RN1REQX_STR-KM_X sy-vline 
WA_RN1REQX_STR-JOD sy-vline 
WA_RN1REQX_STR-JOD_X sy-vline 
WA_RN1REQX_STR-ANDERE sy-vline 
WA_RN1REQX_STR-ANDERE_X sy-vline 
WA_RN1REQX_STR-KGR sy-vline 
WA_RN1REQX_STR-KGR_X sy-vline 
WA_RN1REQX_STR-KGEW sy-vline 
WA_RN1REQX_STR-KGEW_X sy-vline 
WA_RN1REQX_STR-RP sy-vline 
WA_RN1REQX_STR-RP_X sy-vline 
WA_RN1REQX_STR-RPID sy-vline 
WA_RN1REQX_STR-RPID_X sy-vline 
WA_RN1REQX_STR-ORGFD sy-vline 
WA_RN1REQX_STR-ORGFD_X sy-vline 
WA_RN1REQX_STR-MODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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