ABAP Select data from SAP table RN1_S_WVIEW_PG_PO_OUTTAB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1_S_WVIEW_PG_PO_OUTTAB 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 RN1_S_WVIEW_PG_PO_OUTTAB. 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 RN1_S_WVIEW_PG_PO_OUTTAB 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_RN1_S_WVIEW_PG_PO_OUTTAB TYPE STANDARD TABLE OF RN1_S_WVIEW_PG_PO_OUTTAB,
      WA_RN1_S_WVIEW_PG_PO_OUTTAB TYPE RN1_S_WVIEW_PG_PO_OUTTAB,
      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: <RN1_S_WVIEW_PG_PO_OUTTAB> TYPE RN1_S_WVIEW_PG_PO_OUTTAB.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1_S_WVIEW_PG_PO_OUTTAB.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1_S_WVIEW_PG_PO_OUTTAB
  INTO TABLE IT_RN1_S_WVIEW_PG_PO_OUTTAB.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1_S_WVIEW_PG_PO_OUTTAB
*  INTO TABLE @DATA(IT_RN1_S_WVIEW_PG_PO_OUTTAB2).
*--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_RN1_S_WVIEW_PG_PO_OUTTAB INDEX 1 INTO DATA(WA_RN1_S_WVIEW_PG_PO_OUTTAB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1_S_WVIEW_PG_PO_OUTTAB ASSIGNING <RN1_S_WVIEW_PG_PO_OUTTAB>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1_S_WVIEW_PG_PO_OUTTAB>-MANDT = 1.
<RN1_S_WVIEW_PG_PO_OUTTAB>-VIEW_TYPE = 1.
<RN1_S_WVIEW_PG_PO_OUTTAB>-VIEWID = 1.
<RN1_S_WVIEW_PG_PO_OUTTAB>-POBNR = 1.
<RN1_S_WVIEW_PG_PO_OUTTAB>-SEQNR = 1.

ENDLOOP.

LOOP AT IT_RN1_S_WVIEW_PG_PO_OUTTAB INTO WA_RN1_S_WVIEW_PG_PO_OUTTAB.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1_S_WVIEW_PG_PO_OUTTAB-NRDAYS, sy-vline,
  WA_RN1_S_WVIEW_PG_PO_OUTTAB-DAY1, sy-vline,
  WA_RN1_S_WVIEW_PG_PO_OUTTAB-MONDAY, sy-vline,
  WA_RN1_S_WVIEW_PG_PO_OUTTAB-TUESDAY, sy-vline,
  WA_RN1_S_WVIEW_PG_PO_OUTTAB-WEDNESDAY, sy-vline,
  WA_RN1_S_WVIEW_PG_PO_OUTTAB-THURSDAY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1_S_WVIEW_PG_PO_OUTTAB 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_RN1_S_WVIEW_PG_PO_OUTTAB 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_RN1_S_WVIEW_PG_PO_OUTTAB INTO WA_RN1_S_WVIEW_PG_PO_OUTTAB.


*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 DAY1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1_S_WVIEW_PG_PO_OUTTAB-DAY1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1_S_WVIEW_PG_PO_OUTTAB-DAY1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field A_DAY1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1_S_WVIEW_PG_PO_OUTTAB-A_DAY1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1_S_WVIEW_PG_PO_OUTTAB-A_DAY1.
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_RN1_S_WVIEW_PG_PO_OUTTAB_STR, 
MANDT TYPE STRING,
VIEW_TYPE TYPE STRING,
VIEWID TYPE STRING,
POBNR TYPE STRING,
SEQNR TYPE STRING,
NRDAYS TYPE STRING,
DAY1 TYPE STRING,
MONDAY TYPE STRING,
TUESDAY TYPE STRING,
WEDNESDAY TYPE STRING,
THURSDAY TYPE STRING,
FRIDAY TYPE STRING,
SATURDAY TYPE STRING,
SUNDAY TYPE STRING,
STORN TYPE STRING,
PLOB TYPE STRING,
PLOBTXT TYPE STRING,
OE TYPE STRING,
VIEW_BEZ TYPE STRING,
A_DAY1 TYPE STRING,
STYLE TYPE STRING,
CT TYPE STRING,
OBJECT TYPE STRING,
DISABLED TYPE STRING,
INACTIVE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1_S_WVIEW_PG_PO_OUTTAB_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_RN1_S_WVIEW_PG_PO_OUTTAB_STR-MANDT sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-VIEW_TYPE sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-VIEWID sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-POBNR sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-SEQNR sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-NRDAYS sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-DAY1 sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-MONDAY sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-TUESDAY sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-WEDNESDAY sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-THURSDAY sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-FRIDAY sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-SATURDAY sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-SUNDAY sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-STORN sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-PLOB sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-PLOBTXT sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-OE sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-VIEW_BEZ sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-A_DAY1 sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-STYLE sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-CT sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-OBJECT sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-DISABLED sy-vline 
WA_RN1_S_WVIEW_PG_PO_OUTTAB_STR-INACTIVE sy-vline      INTO ld_text SEPARATED BY SPACE.

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