ABAP Select data from SAP table PNDREL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PNDREL
*  INTO TABLE @DATA(IT_PNDREL2).
*--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_PNDREL INDEX 1 INTO DATA(WA_PNDREL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PNDREL>-MANDT = 1.
<PNDREL>-PNINT1 = 1.
<PNDREL>-ALTNUM = 1.
<PNDREL>-PNINT2 = 1.
<PNDREL>-PNRCOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PNDREL-TYPE, sy-vline,
  WA_PNDREL-CREADAT, sy-vline,
  WA_PNDREL-CREABY, sy-vline,
  WA_PNDREL-CHNGDAT, sy-vline,
  WA_PNDREL-CHNGBY, sy-vline,
  WA_PNDREL-LOGSYS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PNDREL 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_PNDREL 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_PNDREL INTO WA_PNDREL.


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

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PNDREL-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PNDREL-LOGSYS.
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_PNDREL_STR, 
MANDT TYPE STRING,
PNINT1 TYPE STRING,
ALTNUM TYPE STRING,
PNINT2 TYPE STRING,
PNRCOUNT TYPE STRING,
TYPE TYPE STRING,
CREADAT TYPE STRING,
CREABY TYPE STRING,
CHNGDAT TYPE STRING,
CHNGBY TYPE STRING,
LOGSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PNDREL_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_PNDREL_STR-MANDT sy-vline 
WA_PNDREL_STR-PNINT1 sy-vline 
WA_PNDREL_STR-ALTNUM sy-vline 
WA_PNDREL_STR-PNINT2 sy-vline 
WA_PNDREL_STR-PNRCOUNT sy-vline 
WA_PNDREL_STR-TYPE sy-vline 
WA_PNDREL_STR-CREADAT sy-vline 
WA_PNDREL_STR-CREABY sy-vline 
WA_PNDREL_STR-CHNGDAT sy-vline 
WA_PNDREL_STR-CHNGBY sy-vline 
WA_PNDREL_STR-LOGSYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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