ABAP Select data from SAP table PKW_EMPLOYEE_SALARY_CERT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKW_EMPLOYEE_SALARY_CERT
*  INTO TABLE @DATA(IT_PKW_EMPLOYEE_SALARY_CERT2).
*--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_PKW_EMPLOYEE_SALARY_CERT INDEX 1 INTO DATA(WA_PKW_EMPLOYEE_SALARY_CERT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKW_EMPLOYEE_SALARY_CERT>-FMONT = 1.
<PKW_EMPLOYEE_SALARY_CERT>-FYEAR = 1.
<PKW_EMPLOYEE_SALARY_CERT>-CNAME = 1.
<PKW_EMPLOYEE_SALARY_CERT>-MFILE = 1.
<PKW_EMPLOYEE_SALARY_CERT>-ATHUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKW_EMPLOYEE_SALARY_CERT-ACIVI, sy-vline,
  WA_PKW_EMPLOYEE_SALARY_CERT-TDATE, sy-vline,
  WA_PKW_EMPLOYEE_SALARY_CERT-NEMPS, sy-vline,
  WA_PKW_EMPLOYEE_SALARY_CERT-PMONT, sy-vline,
  WA_PKW_EMPLOYEE_SALARY_CERT-PYEAR, sy-vline,
  WA_PKW_EMPLOYEE_SALARY_CERT-COWNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKW_EMPLOYEE_SALARY_CERT 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_PKW_EMPLOYEE_SALARY_CERT 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_PKW_EMPLOYEE_SALARY_CERT INTO WA_PKW_EMPLOYEE_SALARY_CERT.


*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 FYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PKW_EMPLOYEE_SALARY_CERT-FYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKW_EMPLOYEE_SALARY_CERT-FYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field PYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PKW_EMPLOYEE_SALARY_CERT-PYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKW_EMPLOYEE_SALARY_CERT-PYEAR.
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_PKW_EMPLOYEE_SALARY_CERT_STR, 
FMONT TYPE STRING,
FYEAR TYPE STRING,
CNAME TYPE STRING,
MFILE TYPE STRING,
ATHUP TYPE STRING,
ACIVI TYPE STRING,
TDATE TYPE STRING,
NEMPS TYPE STRING,
PMONT TYPE STRING,
PYEAR TYPE STRING,
COWNR TYPE STRING,
TRNUM TYPE STRING,
TEFIL TYPE STRING,
TESNT TYPE STRING,
EMPVA TYPE STRING,
ABEMP TYPE STRING,
NWEMP TYPE STRING,
CNEMP TYPE STRING,
TREMP TYPE STRING,
OTEMP TYPE STRING,
NOSAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKW_EMPLOYEE_SALARY_CERT_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_PKW_EMPLOYEE_SALARY_CERT_STR-FMONT sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-FYEAR sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-CNAME sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-MFILE sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-ATHUP sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-ACIVI sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-TDATE sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-NEMPS sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-PMONT sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-PYEAR sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-COWNR sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-TRNUM sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-TEFIL sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-TESNT sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-EMPVA sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-ABEMP sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-NWEMP sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-CNEMP sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-TREMP sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-OTEMP sy-vline 
WA_PKW_EMPLOYEE_SALARY_CERT_STR-NOSAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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