ABAP Select data from SAP table PNEMPLOYWSDET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PNEMPLOYWSDET
*  INTO TABLE @DATA(IT_PNEMPLOYWSDET2).
*--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_PNEMPLOYWSDET INDEX 1 INTO DATA(WA_PNEMPLOYWSDET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PNEMPLOYWSDET>-MANDT = 1.
<PNEMPLOYWSDET>-EMPLOYMENTINTERNALID = 1.
<PNEMPLOYWSDET>-STARTDATE = 1.
<PNEMPLOYWSDET>-ENDDATE = 1.
<PNEMPLOYWSDET>-PERSONNELNUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PNEMPLOYWSDET-ISMAINEMPLOYMENT, sy-vline,
  WA_PNEMPLOYWSDET-EMPLOYMENTPERCENT, sy-vline,
  WA_PNEMPLOYWSDET-WEEKLYWORKINGHOURS, sy-vline,
  WA_PNEMPLOYWSDET-WEEKLYWORKDAYS, sy-vline,
  WA_PNEMPLOYWSDET-PERSONWORKAGRMTAUTHZNGRPG, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_PNEMPLOYWSDET 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_PNEMPLOYWSDET 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_PNEMPLOYWSDET INTO WA_PNEMPLOYWSDET.


*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_PNEMPLOYWSDET_STR, 
MANDT TYPE STRING,
EMPLOYMENTINTERNALID TYPE STRING,
STARTDATE TYPE STRING,
ENDDATE TYPE STRING,
PERSONNELNUMBER TYPE STRING,
ISMAINEMPLOYMENT TYPE STRING,
EMPLOYMENTPERCENT TYPE STRING,
WEEKLYWORKINGHOURS TYPE STRING,
WEEKLYWORKDAYS TYPE STRING,
PERSONWORKAGRMTAUTHZNGRPG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PNEMPLOYWSDET_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_PNEMPLOYWSDET_STR-MANDT sy-vline 
WA_PNEMPLOYWSDET_STR-EMPLOYMENTINTERNALID sy-vline 
WA_PNEMPLOYWSDET_STR-STARTDATE sy-vline 
WA_PNEMPLOYWSDET_STR-ENDDATE sy-vline 
WA_PNEMPLOYWSDET_STR-PERSONNELNUMBER sy-vline 
WA_PNEMPLOYWSDET_STR-ISMAINEMPLOYMENT sy-vline 
WA_PNEMPLOYWSDET_STR-EMPLOYMENTPERCENT sy-vline 
WA_PNEMPLOYWSDET_STR-WEEKLYWORKINGHOURS sy-vline 
WA_PNEMPLOYWSDET_STR-WEEKLYWORKDAYS sy-vline 
WA_PNEMPLOYWSDET_STR-PERSONWORKAGRMTAUTHZNGRPG sy-vline      INTO ld_text SEPARATED BY SPACE.

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