ABAP Select data from SAP table ROI0_REL_PP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ROI0_REL_PP 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 ROI0_REL_PP. 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 ROI0_REL_PP 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_ROI0_REL_PP TYPE STANDARD TABLE OF ROI0_REL_PP,
      WA_ROI0_REL_PP TYPE ROI0_REL_PP,
      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: <ROI0_REL_PP> TYPE ROI0_REL_PP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ROI0_REL_PP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ROI0_REL_PP
  INTO TABLE IT_ROI0_REL_PP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROI0_REL_PP
*  INTO TABLE @DATA(IT_ROI0_REL_PP2).
*--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_ROI0_REL_PP INDEX 1 INTO DATA(WA_ROI0_REL_PP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ROI0_REL_PP ASSIGNING <ROI0_REL_PP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROI0_REL_PP>-DAUAT = 1.
<ROI0_REL_PP>-PSOBS = 1.
<ROI0_REL_PP>-BESKZ = 1.
<ROI0_REL_PP>-MATNR = 1.
<ROI0_REL_PP>-BWTAR = 1.

ENDLOOP.

LOOP AT IT_ROI0_REL_PP INTO WA_ROI0_REL_PP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROI0_REL_PP-BWTTY, sy-vline,
  WA_ROI0_REL_PP-PWERK, sy-vline,
  WA_ROI0_REL_PP-LGORT, sy-vline,
  WA_ROI0_REL_PP-VERID, sy-vline,
  WA_ROI0_REL_PP-DWERK, sy-vline,
  WA_ROI0_REL_PP-CHARG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROI0_REL_PP 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_ROI0_REL_PP 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_ROI0_REL_PP INTO WA_ROI0_REL_PP.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ROI0_REL_PP-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROI0_REL_PP-MATNR.
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_ROI0_REL_PP_STR, 
DAUAT TYPE STRING,
PSOBS TYPE STRING,
BESKZ TYPE STRING,
MATNR TYPE STRING,
BWTAR TYPE STRING,
BWTTY TYPE STRING,
PWERK TYPE STRING,
LGORT TYPE STRING,
VERID TYPE STRING,
DWERK TYPE STRING,
CHARG TYPE STRING,
GSBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROI0_REL_PP_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_ROI0_REL_PP_STR-DAUAT sy-vline 
WA_ROI0_REL_PP_STR-PSOBS sy-vline 
WA_ROI0_REL_PP_STR-BESKZ sy-vline 
WA_ROI0_REL_PP_STR-MATNR sy-vline 
WA_ROI0_REL_PP_STR-BWTAR sy-vline 
WA_ROI0_REL_PP_STR-BWTTY sy-vline 
WA_ROI0_REL_PP_STR-PWERK sy-vline 
WA_ROI0_REL_PP_STR-LGORT sy-vline 
WA_ROI0_REL_PP_STR-VERID sy-vline 
WA_ROI0_REL_PP_STR-DWERK sy-vline 
WA_ROI0_REL_PP_STR-CHARG sy-vline 
WA_ROI0_REL_PP_STR-GSBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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