ABAP Select data from SAP table PESREDEMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PESREDEMP
*  INTO TABLE @DATA(IT_PESREDEMP2).
*--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_PESREDEMP INDEX 1 INTO DATA(WA_PESREDEMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PESREDEMP>-CABECERA = 1.
<PESREDEMP>-REGIMEN = 1.
<PESREDEMP>-SECTOR = 1.
<PESREDEMP>-PROVINCIA = 1.
<PESREDEMP>-NUMERO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PESREDEMP-TIPO_IDEN, sy-vline,
  WA_PESREDEMP-PAIS, sy-vline,
  WA_PESREDEMP-NUM_IDEN, sy-vline,
  WA_PESREDEMP-CALIFIC, sy-vline,
  WA_PESREDEMP-REGIME2, sy-vline,
  WA_PESREDEMP-SECTO2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PESREDEMP 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_PESREDEMP 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_PESREDEMP INTO WA_PESREDEMP.


*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_PESREDEMP_STR, 
CABECERA TYPE STRING,
REGIMEN TYPE STRING,
SECTOR TYPE STRING,
PROVINCIA TYPE STRING,
NUMERO TYPE STRING,
TIPO_IDEN TYPE STRING,
PAIS TYPE STRING,
NUM_IDEN TYPE STRING,
CALIFIC TYPE STRING,
REGIME2 TYPE STRING,
SECTO2 TYPE STRING,
PROVINCI2 TYPE STRING,
NUMER2 TYPE STRING,
ANIO TYPE STRING,
DESDE TYPE STRING,
HASTA TYPE STRING,
CALIFI2 TYPE STRING,
CLASE TYPE STRING,
ACCEMPR TYPE STRING,
MONEDA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PESREDEMP_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_PESREDEMP_STR-CABECERA sy-vline 
WA_PESREDEMP_STR-REGIMEN sy-vline 
WA_PESREDEMP_STR-SECTOR sy-vline 
WA_PESREDEMP_STR-PROVINCIA sy-vline 
WA_PESREDEMP_STR-NUMERO sy-vline 
WA_PESREDEMP_STR-TIPO_IDEN sy-vline 
WA_PESREDEMP_STR-PAIS sy-vline 
WA_PESREDEMP_STR-NUM_IDEN sy-vline 
WA_PESREDEMP_STR-CALIFIC sy-vline 
WA_PESREDEMP_STR-REGIME2 sy-vline 
WA_PESREDEMP_STR-SECTO2 sy-vline 
WA_PESREDEMP_STR-PROVINCI2 sy-vline 
WA_PESREDEMP_STR-NUMER2 sy-vline 
WA_PESREDEMP_STR-ANIO sy-vline 
WA_PESREDEMP_STR-DESDE sy-vline 
WA_PESREDEMP_STR-HASTA sy-vline 
WA_PESREDEMP_STR-CALIFI2 sy-vline 
WA_PESREDEMP_STR-CLASE sy-vline 
WA_PESREDEMP_STR-ACCEMPR sy-vline 
WA_PESREDEMP_STR-MONEDA sy-vline      INTO ld_text SEPARATED BY SPACE.

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