ABAP Select data from SAP table PPL20 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PPL20 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 PPL20. 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 PPL20 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_PPL20 TYPE STANDARD TABLE OF PPL20,
      WA_PPL20 TYPE PPL20,
      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: <PPL20> TYPE PPL20.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PPL20.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PPL20
  INTO TABLE IT_PPL20.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PPL20
*  INTO TABLE @DATA(IT_PPL202).
*--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_PPL20 INDEX 1 INTO DATA(WA_PPL202).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PPL20 ASSIGNING <PPL20>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PPL20>-PERNR = 1.
<PPL20>-ENAME = 1.
<PPL20>-ADR01 = 1.
<PPL20>-ADR02 = 1.
<PPL20>-BUTXT = 1.

ENDLOOP.

LOOP AT IT_PPL20 INTO WA_PPL20.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PPL20-PBTXT, sy-vline,
  WA_PPL20-BTEXT, sy-vline,
  WA_PPL20-GBDAT, sy-vline,
  WA_PPL20-HDATE, sy-vline,
  WA_PPL20-WTTXT, sy-vline,
  WA_PPL20-MTH01, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PPL20 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_PPL20 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_PPL20 INTO WA_PPL20.


*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 PDATE, internal->external for field GBDAT
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_PPL20-GBDAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PPL20-GBDAT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PPL20-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PPL20-KOSTL.
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_PPL20_STR, 
PERNR TYPE STRING,
ENAME TYPE STRING,
ADR01 TYPE STRING,
ADR02 TYPE STRING,
BUTXT TYPE STRING,
PBTXT TYPE STRING,
BTEXT TYPE STRING,
GBDAT TYPE STRING,
HDATE TYPE STRING,
WTTXT TYPE STRING,
MTH01 TYPE STRING,
MTH02 TYPE STRING,
MTH03 TYPE STRING,
MTH04 TYPE STRING,
MTH05 TYPE STRING,
MTH06 TYPE STRING,
MTH07 TYPE STRING,
MTH08 TYPE STRING,
MTH09 TYPE STRING,
MTH10 TYPE STRING,
MTH11 TYPE STRING,
MTH12 TYPE STRING,
TOTAL TYPE STRING,
WTGRP TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
WERKS TYPE STRING,
BTRTL TYPE STRING,
PERSG TYPE STRING,
PERSK TYPE STRING,
ABKRS TYPE STRING,
KOKRS TYPE STRING,
KOSTL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PPL20_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_PPL20_STR-PERNR sy-vline 
WA_PPL20_STR-ENAME sy-vline 
WA_PPL20_STR-ADR01 sy-vline 
WA_PPL20_STR-ADR02 sy-vline 
WA_PPL20_STR-BUTXT sy-vline 
WA_PPL20_STR-PBTXT sy-vline 
WA_PPL20_STR-BTEXT sy-vline 
WA_PPL20_STR-GBDAT sy-vline 
WA_PPL20_STR-HDATE sy-vline 
WA_PPL20_STR-WTTXT sy-vline 
WA_PPL20_STR-MTH01 sy-vline 
WA_PPL20_STR-MTH02 sy-vline 
WA_PPL20_STR-MTH03 sy-vline 
WA_PPL20_STR-MTH04 sy-vline 
WA_PPL20_STR-MTH05 sy-vline 
WA_PPL20_STR-MTH06 sy-vline 
WA_PPL20_STR-MTH07 sy-vline 
WA_PPL20_STR-MTH08 sy-vline 
WA_PPL20_STR-MTH09 sy-vline 
WA_PPL20_STR-MTH10 sy-vline 
WA_PPL20_STR-MTH11 sy-vline 
WA_PPL20_STR-MTH12 sy-vline 
WA_PPL20_STR-TOTAL sy-vline 
WA_PPL20_STR-WTGRP sy-vline 
WA_PPL20_STR-BUKRS sy-vline 
WA_PPL20_STR-GSBER sy-vline 
WA_PPL20_STR-WERKS sy-vline 
WA_PPL20_STR-BTRTL sy-vline 
WA_PPL20_STR-PERSG sy-vline 
WA_PPL20_STR-PERSK sy-vline 
WA_PPL20_STR-ABKRS sy-vline 
WA_PPL20_STR-KOKRS sy-vline 
WA_PPL20_STR-KOSTL sy-vline      INTO ld_text SEPARATED BY SPACE.

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