ABAP Select data from SAP table RNSRVP_LIST_LINE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNSRVP_LIST_LINE
*  INTO TABLE @DATA(IT_RNSRVP_LIST_LINE2).
*--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_RNSRVP_LIST_LINE INDEX 1 INTO DATA(WA_RNSRVP_LIST_LINE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNSRVP_LIST_LINE>-EINRI = 1.
<RNSRVP_LIST_LINE>-SRVPNO = 1.
<RNSRVP_LIST_LINE>-SRVPID = 1.
<RNSRVP_LIST_LINE>-SRVP_TXT = 1.
<RNSRVP_LIST_LINE>-CATID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNSRVP_LIST_LINE-TMNID, sy-vline,
  WA_RNSRVP_LIST_LINE-ACCTY, sy-vline,
  WA_RNSRVP_LIST_LINE-ACCTYT, sy-vline,
  WA_RNSRVP_LIST_LINE-PRIOCL, sy-vline,
  WA_RNSRVP_LIST_LINE-PRIOCLT, sy-vline,
  WA_RNSRVP_LIST_LINE-DURMIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNSRVP_LIST_LINE 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_RNSRVP_LIST_LINE 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_RNSRVP_LIST_LINE INTO WA_RNSRVP_LIST_LINE.


*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_RNSRVP_LIST_LINE-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNSRVP_LIST_LINE-EINRI.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNSRVP_LIST_LINE-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNSRVP_LIST_LINE-GPART.
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_RNSRVP_LIST_LINE_STR, 
EINRI TYPE STRING,
SRVPNO TYPE STRING,
SRVPID TYPE STRING,
SRVP_TXT TYPE STRING,
CATID TYPE STRING,
TMNID TYPE STRING,
ACCTY TYPE STRING,
ACCTYT TYPE STRING,
PRIOCL TYPE STRING,
PRIOCLT TYPE STRING,
DURMIN TYPE STRING,
PATKZ TYPE STRING,
ROLTPE TYPE STRING,
ROLBZ TYPE STRING,
GPART TYPE STRING,
GPART_NAME TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
STORN TYPE STRING,
STDAT TYPE STRING,
STUSR TYPE STRING,
APP_OBJ TYPE STRING,
SRVP_OBJ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNSRVP_LIST_LINE_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_RNSRVP_LIST_LINE_STR-EINRI sy-vline 
WA_RNSRVP_LIST_LINE_STR-SRVPNO sy-vline 
WA_RNSRVP_LIST_LINE_STR-SRVPID sy-vline 
WA_RNSRVP_LIST_LINE_STR-SRVP_TXT sy-vline 
WA_RNSRVP_LIST_LINE_STR-CATID sy-vline 
WA_RNSRVP_LIST_LINE_STR-TMNID sy-vline 
WA_RNSRVP_LIST_LINE_STR-ACCTY sy-vline 
WA_RNSRVP_LIST_LINE_STR-ACCTYT sy-vline 
WA_RNSRVP_LIST_LINE_STR-PRIOCL sy-vline 
WA_RNSRVP_LIST_LINE_STR-PRIOCLT sy-vline 
WA_RNSRVP_LIST_LINE_STR-DURMIN sy-vline 
WA_RNSRVP_LIST_LINE_STR-PATKZ sy-vline 
WA_RNSRVP_LIST_LINE_STR-ROLTPE sy-vline 
WA_RNSRVP_LIST_LINE_STR-ROLBZ sy-vline 
WA_RNSRVP_LIST_LINE_STR-GPART sy-vline 
WA_RNSRVP_LIST_LINE_STR-GPART_NAME sy-vline 
WA_RNSRVP_LIST_LINE_STR-ERDAT sy-vline 
WA_RNSRVP_LIST_LINE_STR-ERUSR sy-vline 
WA_RNSRVP_LIST_LINE_STR-UPDAT sy-vline 
WA_RNSRVP_LIST_LINE_STR-UPUSR sy-vline 
WA_RNSRVP_LIST_LINE_STR-STORN sy-vline 
WA_RNSRVP_LIST_LINE_STR-STDAT sy-vline 
WA_RNSRVP_LIST_LINE_STR-STUSR sy-vline 
WA_RNSRVP_LIST_LINE_STR-APP_OBJ sy-vline 
WA_RNSRVP_LIST_LINE_STR-SRVP_OBJ sy-vline      INTO ld_text SEPARATED BY SPACE.

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