ABAP Select data from SAP table RN1WP_REQUEST_LIST_REQ into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1WP_REQUEST_LIST_REQ 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 RN1WP_REQUEST_LIST_REQ. 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 RN1WP_REQUEST_LIST_REQ 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_RN1WP_REQUEST_LIST_REQ TYPE STANDARD TABLE OF RN1WP_REQUEST_LIST_REQ,
      WA_RN1WP_REQUEST_LIST_REQ TYPE RN1WP_REQUEST_LIST_REQ,
      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: <RN1WP_REQUEST_LIST_REQ> TYPE RN1WP_REQUEST_LIST_REQ.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1WP_REQUEST_LIST_REQ.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1WP_REQUEST_LIST_REQ
  INTO TABLE IT_RN1WP_REQUEST_LIST_REQ.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1WP_REQUEST_LIST_REQ
*  INTO TABLE @DATA(IT_RN1WP_REQUEST_LIST_REQ2).
*--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_RN1WP_REQUEST_LIST_REQ INDEX 1 INTO DATA(WA_RN1WP_REQUEST_LIST_REQ2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1WP_REQUEST_LIST_REQ ASSIGNING <RN1WP_REQUEST_LIST_REQ>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1WP_REQUEST_LIST_REQ>-FALNR = 1.
<RN1WP_REQUEST_LIST_REQ>-REQTYPE = 1.
<RN1WP_REQUEST_LIST_REQ>-CORDERID = 1.
<RN1WP_REQUEST_LIST_REQ>-VKGID = 1.
<RN1WP_REQUEST_LIST_REQ>-POSNR = 1.

ENDLOOP.

LOOP AT IT_RN1WP_REQUEST_LIST_REQ INTO WA_RN1WP_REQUEST_LIST_REQ.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1WP_REQUEST_LIST_REQ-OBJ_CORDER, sy-vline,
  WA_RN1WP_REQUEST_LIST_REQ-ANFID, sy-vline,
  WA_RN1WP_REQUEST_LIST_REQ-ANFNR, sy-vline,
  WA_RN1WP_REQUEST_LIST_REQ-ANFTY, sy-vline,
  WA_RN1WP_REQUEST_LIST_REQ-TPAE, sy-vline,
  WA_RN1WP_REQUEST_LIST_REQ-TPATXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1WP_REQUEST_LIST_REQ 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_RN1WP_REQUEST_LIST_REQ 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_RN1WP_REQUEST_LIST_REQ INTO WA_RN1WP_REQUEST_LIST_REQ.


*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 FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WP_REQUEST_LIST_REQ-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WP_REQUEST_LIST_REQ-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WP_REQUEST_LIST_REQ-ANFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WP_REQUEST_LIST_REQ-ANFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANKERLEI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WP_REQUEST_LIST_REQ-ANKERLEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WP_REQUEST_LIST_REQ-ANKERLEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANFOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WP_REQUEST_LIST_REQ-ANFOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WP_REQUEST_LIST_REQ-ANFOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANPOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WP_REQUEST_LIST_REQ-ANPOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WP_REQUEST_LIST_REQ-ANPOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ETRGP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WP_REQUEST_LIST_REQ-ETRGP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WP_REQUEST_LIST_REQ-ETRGP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TRTGP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1WP_REQUEST_LIST_REQ-TRTGP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1WP_REQUEST_LIST_REQ-TRTGP.
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_RN1WP_REQUEST_LIST_REQ_STR, 
FALNR TYPE STRING,
REQTYPE TYPE STRING,
CORDERID TYPE STRING,
VKGID TYPE STRING,
POSNR TYPE STRING,
OBJ_CORDER TYPE STRING,
ANFID TYPE STRING,
ANFNR TYPE STRING,
ANFTY TYPE STRING,
TPAE TYPE STRING,
TPATXT TYPE STRING,
APRIE TYPE STRING,
SCHW TYPE STRING,
RCKRUF TYPE STRING,
TDOK_ICON TYPE STRING,
TDOK_EXIST TYPE STRING,
POSTOP_ICON TYPE STRING,
POSTOP_EXIST TYPE STRING,
PRAEOP_ICON TYPE STRING,
PRAEOP_EXIST TYPE STRING,
ANKERLEI TYPE STRING,
ANFOE TYPE STRING,
ANPOE TYPE STRING,
ETRGP TYPE STRING,
ETRGP_TXT TYPE STRING,
TRTGP TYPE STRING,
TRTGP_TXT TYPE STRING,
EBGDT TYPE STRING,
EBZT TYPE STRING,
ERUSR TYPE STRING,
TXTTYPE TYPE STRING,
TXTOBJECT TYPE STRING,
STDAT TYPE STRING,
STTIM TYPE STRING,
STUSR TYPE STRING,
STOID TYPE STRING,
STOTX TYPE STRING,
WUZPE TYPE STRING,
WUZPRFG TYPE STRING,
WUMNT TYPE STRING,
WUMNT_TXT TYPE STRING,
WUJHR TYPE STRING,
CPOSQUEST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1WP_REQUEST_LIST_REQ_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_RN1WP_REQUEST_LIST_REQ_STR-FALNR sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-REQTYPE sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-CORDERID sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-VKGID sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-POSNR sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-OBJ_CORDER sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-ANFID sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-ANFNR sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-ANFTY sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-TPAE sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-TPATXT sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-APRIE sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-SCHW sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-RCKRUF sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-TDOK_ICON sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-TDOK_EXIST sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-POSTOP_ICON sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-POSTOP_EXIST sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-PRAEOP_ICON sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-PRAEOP_EXIST sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-ANKERLEI sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-ANFOE sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-ANPOE sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-ETRGP sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-ETRGP_TXT sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-TRTGP sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-TRTGP_TXT sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-EBGDT sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-EBZT sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-ERUSR sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-TXTTYPE sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-TXTOBJECT sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-STDAT sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-STTIM sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-STUSR sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-STOID sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-STOTX sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-WUZPE sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-WUZPRFG sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-WUMNT sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-WUMNT_TXT sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-WUJHR sy-vline 
WA_RN1WP_REQUEST_LIST_REQ_STR-CPOSQUEST sy-vline      INTO ld_text SEPARATED BY SPACE.

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