ABAP Select data from SAP table PAEP_PNRULES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PAEP_PNRULES
*  INTO TABLE @DATA(IT_PAEP_PNRULES2).
*--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_PAEP_PNRULES INDEX 1 INTO DATA(WA_PAEP_PNRULES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PAEP_PNRULES>-PERNR = 1.
<PAEP_PNRULES>-AGE = 1.
<PAEP_PNRULES>-PNYRS = 1.
<PAEP_PNRULES>-PNMNS = 1.
<PAEP_PNRULES>-KYPOS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PAEP_PNRULES-GESCH, sy-vline,
  WA_PAEP_PNRULES-FAMST, sy-vline,
  WA_PAEP_PNRULES-CHILD, sy-vline,
  WA_PAEP_PNRULES-TERMI, sy-vline,
  WA_PAEP_PNRULES-DISAB, sy-vline,
  WA_PAEP_PNRULES-PNTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PAEP_PNRULES 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_PAEP_PNRULES 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_PAEP_PNRULES INTO WA_PAEP_PNRULES.


*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_PAEP_PNRULES_STR, 
PERNR TYPE STRING,
AGE TYPE STRING,
PNYRS TYPE STRING,
PNMNS TYPE STRING,
KYPOS TYPE STRING,
GESCH TYPE STRING,
FAMST TYPE STRING,
CHILD TYPE STRING,
TERMI TYPE STRING,
DISAB TYPE STRING,
PNTYP TYPE STRING,
TRFGR TYPE STRING,
AVGSAL TYPE STRING,
ELIG_DESC TYPE STRING,
PENSION_AMOUNT TYPE STRING,
PENSION_COMPENSATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PAEP_PNRULES_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_PAEP_PNRULES_STR-PERNR sy-vline 
WA_PAEP_PNRULES_STR-AGE sy-vline 
WA_PAEP_PNRULES_STR-PNYRS sy-vline 
WA_PAEP_PNRULES_STR-PNMNS sy-vline 
WA_PAEP_PNRULES_STR-KYPOS sy-vline 
WA_PAEP_PNRULES_STR-GESCH sy-vline 
WA_PAEP_PNRULES_STR-FAMST sy-vline 
WA_PAEP_PNRULES_STR-CHILD sy-vline 
WA_PAEP_PNRULES_STR-TERMI sy-vline 
WA_PAEP_PNRULES_STR-DISAB sy-vline 
WA_PAEP_PNRULES_STR-PNTYP sy-vline 
WA_PAEP_PNRULES_STR-TRFGR sy-vline 
WA_PAEP_PNRULES_STR-AVGSAL sy-vline 
WA_PAEP_PNRULES_STR-ELIG_DESC sy-vline 
WA_PAEP_PNRULES_STR-PENSION_AMOUNT sy-vline 
WA_PAEP_PNRULES_STR-PENSION_COMPENSATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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