ABAP Select data from SAP table PAIETWSS02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PAIETWSS02 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 PAIETWSS02. 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 PAIETWSS02 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_PAIETWSS02 TYPE STANDARD TABLE OF PAIETWSS02,
      WA_PAIETWSS02 TYPE PAIETWSS02,
      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: <PAIETWSS02> TYPE PAIETWSS02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PAIETWSS02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PAIETWSS02
  INTO TABLE IT_PAIETWSS02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PAIETWSS02
*  INTO TABLE @DATA(IT_PAIETWSS022).
*--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_PAIETWSS02 INDEX 1 INTO DATA(WA_PAIETWSS022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PAIETWSS02 ASSIGNING <PAIETWSS02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PAIETWSS02>-MANDT = 1.
<PAIETWSS02>-ERNIE = 1.
<PAIETWSS02>-TAXYR = 1.
<PAIETWSS02>-DLDTE = 1.
<PAIETWSS02>-DLTIM = 1.

ENDLOOP.

LOOP AT IT_PAIETWSS02 INTO WA_PAIETWSS02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PAIETWSS02-PPSN, sy-vline,
  WA_PAIETWSS02-EMPID, sy-vline,
  WA_PAIETWSS02-EMPRF, sy-vline,
  WA_PAIETWSS02-ELIGI, sy-vline,
  WA_PAIETWSS02-VORNA, sy-vline,
  WA_PAIETWSS02-NACHN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PAIETWSS02 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_PAIETWSS02 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_PAIETWSS02 INTO WA_PAIETWSS02.


*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 GJAHR, internal->external for field TAXYR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PAIETWSS02-TAXYR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PAIETWSS02-TAXYR.
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_PAIETWSS02_STR, 
MANDT TYPE STRING,
ERNIE TYPE STRING,
TAXYR TYPE STRING,
DLDTE TYPE STRING,
DLTIM TYPE STRING,
PPSN TYPE STRING,
EMPID TYPE STRING,
EMPRF TYPE STRING,
ELIGI TYPE STRING,
VORNA TYPE STRING,
NACHN TYPE STRING,
GSPY TYPE STRING,
TXPD TYPE STRING,
USPD TYPE STRING,
PEPD TYPE STRING,
DIVISOR TYPE STRING,
ARNWP TYPE STRING,
T1 TYPE STRING,
T1MWWS TYPE STRING,
T1MWEPBT TYPE STRING,
T2 TYPE STRING,
T2MWWS TYPE STRING,
T2MWEPBT TYPE STRING,
T3 TYPE STRING,
T3MWWS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PAIETWSS02_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_PAIETWSS02_STR-MANDT sy-vline 
WA_PAIETWSS02_STR-ERNIE sy-vline 
WA_PAIETWSS02_STR-TAXYR sy-vline 
WA_PAIETWSS02_STR-DLDTE sy-vline 
WA_PAIETWSS02_STR-DLTIM sy-vline 
WA_PAIETWSS02_STR-PPSN sy-vline 
WA_PAIETWSS02_STR-EMPID sy-vline 
WA_PAIETWSS02_STR-EMPRF sy-vline 
WA_PAIETWSS02_STR-ELIGI sy-vline 
WA_PAIETWSS02_STR-VORNA sy-vline 
WA_PAIETWSS02_STR-NACHN sy-vline 
WA_PAIETWSS02_STR-GSPY sy-vline 
WA_PAIETWSS02_STR-TXPD sy-vline 
WA_PAIETWSS02_STR-USPD sy-vline 
WA_PAIETWSS02_STR-PEPD sy-vline 
WA_PAIETWSS02_STR-DIVISOR sy-vline 
WA_PAIETWSS02_STR-ARNWP sy-vline 
WA_PAIETWSS02_STR-T1 sy-vline 
WA_PAIETWSS02_STR-T1MWWS sy-vline 
WA_PAIETWSS02_STR-T1MWEPBT sy-vline 
WA_PAIETWSS02_STR-T2 sy-vline 
WA_PAIETWSS02_STR-T2MWWS sy-vline 
WA_PAIETWSS02_STR-T2MWEPBT sy-vline 
WA_PAIETWSS02_STR-T3 sy-vline 
WA_PAIETWSS02_STR-T3MWWS sy-vline      INTO ld_text SEPARATED BY SPACE.

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