ABAP Select data from SAP table PPEWEB_RELATION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PPEWEB_RELATION
*  INTO TABLE @DATA(IT_PPEWEB_RELATION2).
*--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_PPEWEB_RELATION INDEX 1 INTO DATA(WA_PPEWEB_RELATION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PPEWEB_RELATION>-RELATION_ID = 1.
<PPEWEB_RELATION>-RELATION_TYPE = 1.
<PPEWEB_RELATION>-RELATION_TYPE_NAME = 1.
<PPEWEB_RELATION>-CHANGE_NO = 1.
<PPEWEB_RELATION>-DELETE_FLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PPEWEB_RELATION-NODE_ID, sy-vline,
  WA_PPEWEB_RELATION-NODE_NAME, sy-vline,
  WA_PPEWEB_RELATION-NODE_TYPE, sy-vline,
  WA_PPEWEB_RELATION-NODE_TEXT, sy-vline,
  WA_PPEWEB_RELATION-VARIANT_ID, sy-vline,
  WA_PPEWEB_RELATION-VARIANT_NAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PPEWEB_RELATION 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_PPEWEB_RELATION 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_PPEWEB_RELATION INTO WA_PPEWEB_RELATION.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PPEWEB_RELATION_STR, 
RELATION_ID TYPE STRING,
RELATION_TYPE TYPE STRING,
RELATION_TYPE_NAME TYPE STRING,
CHANGE_NO TYPE STRING,
DELETE_FLG TYPE STRING,
NODE_ID TYPE STRING,
NODE_NAME TYPE STRING,
NODE_TYPE TYPE STRING,
NODE_TEXT TYPE STRING,
VARIANT_ID TYPE STRING,
VARIANT_NAME TYPE STRING,
VARIANT_CHANGE_NO TYPE STRING,
ALTERNATIVE_ID TYPE STRING,
ALTERNATIVE_NAME TYPE STRING,
CLASS_NUM TYPE STRING,
CLASS_TYPE TYPE STRING,
CLASS_NAME TYPE STRING,
OBJECT_OTYPE TYPE STRING,
OBJECT_TYPE TYPE STRING,
OBJECT_TYPE_NAME TYPE STRING,
OBJECT_TYPE_ICON TYPE STRING,
OBJECT_TEXT TYPE STRING,
OBJECT_APPLOBJ_TYPE TYPE STRING,
DECOMP_FLG TYPE STRING,
PLEVEL TYPE STRING,
PATHS_ON_STRUC_LEVEL TYPE STRING,
ORIGIN_ID TYPE STRING,
ORIGIN_OTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PPEWEB_RELATION_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_PPEWEB_RELATION_STR-RELATION_ID sy-vline 
WA_PPEWEB_RELATION_STR-RELATION_TYPE sy-vline 
WA_PPEWEB_RELATION_STR-RELATION_TYPE_NAME sy-vline 
WA_PPEWEB_RELATION_STR-CHANGE_NO sy-vline 
WA_PPEWEB_RELATION_STR-DELETE_FLG sy-vline 
WA_PPEWEB_RELATION_STR-NODE_ID sy-vline 
WA_PPEWEB_RELATION_STR-NODE_NAME sy-vline 
WA_PPEWEB_RELATION_STR-NODE_TYPE sy-vline 
WA_PPEWEB_RELATION_STR-NODE_TEXT sy-vline 
WA_PPEWEB_RELATION_STR-VARIANT_ID sy-vline 
WA_PPEWEB_RELATION_STR-VARIANT_NAME sy-vline 
WA_PPEWEB_RELATION_STR-VARIANT_CHANGE_NO sy-vline 
WA_PPEWEB_RELATION_STR-ALTERNATIVE_ID sy-vline 
WA_PPEWEB_RELATION_STR-ALTERNATIVE_NAME sy-vline 
WA_PPEWEB_RELATION_STR-CLASS_NUM sy-vline 
WA_PPEWEB_RELATION_STR-CLASS_TYPE sy-vline 
WA_PPEWEB_RELATION_STR-CLASS_NAME sy-vline 
WA_PPEWEB_RELATION_STR-OBJECT_OTYPE sy-vline 
WA_PPEWEB_RELATION_STR-OBJECT_TYPE sy-vline 
WA_PPEWEB_RELATION_STR-OBJECT_TYPE_NAME sy-vline 
WA_PPEWEB_RELATION_STR-OBJECT_TYPE_ICON sy-vline 
WA_PPEWEB_RELATION_STR-OBJECT_TEXT sy-vline 
WA_PPEWEB_RELATION_STR-OBJECT_APPLOBJ_TYPE sy-vline 
WA_PPEWEB_RELATION_STR-DECOMP_FLG sy-vline 
WA_PPEWEB_RELATION_STR-PLEVEL sy-vline 
WA_PPEWEB_RELATION_STR-PATHS_ON_STRUC_LEVEL sy-vline 
WA_PPEWEB_RELATION_STR-ORIGIN_ID sy-vline 
WA_PPEWEB_RELATION_STR-ORIGIN_OTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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