ABAP Select data from SAP table /PLMU/S_PPE_RELATION_UI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /PLMU/S_PPE_RELATION_UI 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 /PLMU/S_PPE_RELATION_UI. 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 /PLMU/S_PPE_RELATION_UI 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_/PLMU/S_PPE_RELATION_UI TYPE STANDARD TABLE OF /PLMU/S_PPE_RELATION_UI,
      WA_/PLMU/S_PPE_RELATION_UI TYPE /PLMU/S_PPE_RELATION_UI,
      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: </PLMU/S_PPE_RELATION_UI> TYPE /PLMU/S_PPE_RELATION_UI.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /PLMU/S_PPE_RELATION_UI
  INTO TABLE IT_/PLMU/S_PPE_RELATION_UI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PLMU/S_PPE_RELATION_UI
*  INTO TABLE @DATA(IT_/PLMU/S_PPE_RELATION_UI2).
*--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_/PLMU/S_PPE_RELATION_UI INDEX 1 INTO DATA(WA_/PLMU/S_PPE_RELATION_UI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/PLMU/S_PPE_RELATION_UI ASSIGNING </PLMU/S_PPE_RELATION_UI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PLMU/S_PPE_RELATION_UI>-OBJECT_TYPE = 1.
</PLMU/S_PPE_RELATION_UI>-GUID = 1.
</PLMU/S_PPE_RELATION_UI>-ECN_COUNTER = 1.
</PLMU/S_PPE_RELATION_UI>-APPLREL_TYPE = 1.
</PLMU/S_PPE_RELATION_UI>-RELATION_TYPE = 1.

ENDLOOP.

LOOP AT IT_/PLMU/S_PPE_RELATION_UI INTO WA_/PLMU/S_PPE_RELATION_UI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PLMU/S_PPE_RELATION_UI-PARENT_OBJECT_TYPE, sy-vline,
  WA_/PLMU/S_PPE_RELATION_UI-PARENT_GUID, sy-vline,
  WA_/PLMU/S_PPE_RELATION_UI-PARENT_APPLOBJ_TYPE, sy-vline,
  WA_/PLMU/S_PPE_RELATION_UI-CHILD_OBJECT_TYPE, sy-vline,
  WA_/PLMU/S_PPE_RELATION_UI-CHILD_GUID, sy-vline,
  WA_/PLMU/S_PPE_RELATION_UI-CHILD_APPLOBJ_TYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PLMU/S_PPE_RELATION_UI 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_/PLMU/S_PPE_RELATION_UI 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_/PLMU/S_PPE_RELATION_UI INTO WA_/PLMU/S_PPE_RELATION_UI.


*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 LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PLMU/S_PPE_RELATION_UI-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMU/S_PPE_RELATION_UI-LOGSYS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field CHANGE_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PLMU/S_PPE_RELATION_UI-CHANGE_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PLMU/S_PPE_RELATION_UI-CHANGE_NO.
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_/PLMU/S_PPE_RELATION_UI_STR, 
OBJECT_TYPE TYPE STRING,
GUID TYPE STRING,
ECN_COUNTER TYPE STRING,
APPLREL_TYPE TYPE STRING,
RELATION_TYPE TYPE STRING,
PARENT_OBJECT_TYPE TYPE STRING,
PARENT_GUID TYPE STRING,
PARENT_APPLOBJ_TYPE TYPE STRING,
CHILD_OBJECT_TYPE TYPE STRING,
CHILD_GUID TYPE STRING,
CHILD_APPLOBJ_TYPE TYPE STRING,
SORT TYPE STRING,
TIMESTMP TYPE STRING,
CREADAT TYPE STRING,
CREABY TYPE STRING,
CHNGDAT TYPE STRING,
CHNGBY TYPE STRING,
LOGSYS TYPE STRING,
HISTFLG TYPE STRING,
NODE_NAME TYPE STRING,
NODE_TYPE TYPE STRING,
NODE_TYPE_DESCR TYPE STRING,
NODE_TEXT TYPE STRING,
NODE_ECN_COUNTER TYPE STRING,
NODE_CHANGE_NO TYPE STRING,
CLINT TYPE STRING,
CLASS TYPE STRING,
CLASS_TYPE TYPE STRING,
CLASS_DESC TYPE STRING,
LONG_TEXT_EXISTS TYPE STRING,
CHANGE_NO TYPE STRING,
DELETION_FLAG TYPE STRING,
PARAMETER_EFFECTIVITY TYPE STRING,
CHANGE_NUMBER_LOCKED TYPE STRING,
LONG_TEXT_LINK TYPE STRING,
LONG_TEXT_LINK_ENABLED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PLMU/S_PPE_RELATION_UI_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_/PLMU/S_PPE_RELATION_UI_STR-OBJECT_TYPE sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-GUID sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-ECN_COUNTER sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-APPLREL_TYPE sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-RELATION_TYPE sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-PARENT_OBJECT_TYPE sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-PARENT_GUID sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-PARENT_APPLOBJ_TYPE sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-CHILD_OBJECT_TYPE sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-CHILD_GUID sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-CHILD_APPLOBJ_TYPE sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-SORT sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-TIMESTMP sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-CREADAT sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-CREABY sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-CHNGDAT sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-CHNGBY sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-LOGSYS sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-HISTFLG sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-NODE_NAME sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-NODE_TYPE sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-NODE_TYPE_DESCR sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-NODE_TEXT sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-NODE_ECN_COUNTER sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-NODE_CHANGE_NO sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-CLINT sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-CLASS sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-CLASS_TYPE sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-CLASS_DESC sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-LONG_TEXT_EXISTS sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-CHANGE_NO sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-DELETION_FLAG sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-PARAMETER_EFFECTIVITY sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-CHANGE_NUMBER_LOCKED sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-LONG_TEXT_LINK sy-vline 
WA_/PLMU/S_PPE_RELATION_UI_STR-LONG_TEXT_LINK_ENABLED sy-vline      INTO ld_text SEPARATED BY SPACE.

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