ABAP Select data from SAP table PEX2003GEN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PEX2003GEN 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 PEX2003GEN. 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 PEX2003GEN 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_PEX2003GEN TYPE STANDARD TABLE OF PEX2003GEN,
      WA_PEX2003GEN TYPE PEX2003GEN,
      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: <PEX2003GEN> TYPE PEX2003GEN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PEX2003GEN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PEX2003GEN
  INTO TABLE IT_PEX2003GEN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PEX2003GEN
*  INTO TABLE @DATA(IT_PEX2003GEN2).
*--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_PEX2003GEN INDEX 1 INTO DATA(WA_PEX2003GEN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PEX2003GEN ASSIGNING <PEX2003GEN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PEX2003GEN>-LOGSYS = 1.
<PEX2003GEN>-AWTYP = 1.
<PEX2003GEN>-AWKEY = 1.
<PEX2003GEN>-STOKZ = 1.
<PEX2003GEN>-CUSTFLD = 1.

ENDLOOP.

LOOP AT IT_PEX2003GEN INTO WA_PEX2003GEN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PEX2003GEN-PERNR, sy-vline,
  WA_PEX2003GEN-DATUM, sy-vline,
  WA_PEX2003GEN-SPRPS, sy-vline,
  WA_PEX2003GEN-VTART, sy-vline,
  WA_PEX2003GEN-TPROG, sy-vline,
  WA_PEX2003GEN-VARIA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PEX2003GEN 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_PEX2003GEN 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_PEX2003GEN INTO WA_PEX2003GEN.


*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 ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PEX2003GEN-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PEX2003GEN-LOGSYS.
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_PEX2003GEN_STR, 
LOGSYS TYPE STRING,
AWTYP TYPE STRING,
AWKEY TYPE STRING,
STOKZ TYPE STRING,
CUSTFLD TYPE STRING,
PERNR TYPE STRING,
DATUM TYPE STRING,
SPRPS TYPE STRING,
VTART TYPE STRING,
TPROG TYPE STRING,
VARIA TYPE STRING,
PAMOD TYPE STRING,
NO_BREAKS TYPE STRING,
TPKLA TYPE STRING,
TAGTY TYPE STRING,
TRFGR TYPE STRING,
TRFST TYPE STRING,
PRAKN TYPE STRING,
PRAKZ TYPE STRING,
OTYPE TYPE STRING,
PLANS TYPE STRING,
AUFKZ TYPE STRING,
BWGRL TYPE STRING,
WAERS TYPE STRING,
WTART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PEX2003GEN_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_PEX2003GEN_STR-LOGSYS sy-vline 
WA_PEX2003GEN_STR-AWTYP sy-vline 
WA_PEX2003GEN_STR-AWKEY sy-vline 
WA_PEX2003GEN_STR-STOKZ sy-vline 
WA_PEX2003GEN_STR-CUSTFLD sy-vline 
WA_PEX2003GEN_STR-PERNR sy-vline 
WA_PEX2003GEN_STR-DATUM sy-vline 
WA_PEX2003GEN_STR-SPRPS sy-vline 
WA_PEX2003GEN_STR-VTART sy-vline 
WA_PEX2003GEN_STR-TPROG sy-vline 
WA_PEX2003GEN_STR-VARIA sy-vline 
WA_PEX2003GEN_STR-PAMOD sy-vline 
WA_PEX2003GEN_STR-NO_BREAKS sy-vline 
WA_PEX2003GEN_STR-TPKLA sy-vline 
WA_PEX2003GEN_STR-TAGTY sy-vline 
WA_PEX2003GEN_STR-TRFGR sy-vline 
WA_PEX2003GEN_STR-TRFST sy-vline 
WA_PEX2003GEN_STR-PRAKN sy-vline 
WA_PEX2003GEN_STR-PRAKZ sy-vline 
WA_PEX2003GEN_STR-OTYPE sy-vline 
WA_PEX2003GEN_STR-PLANS sy-vline 
WA_PEX2003GEN_STR-AUFKZ sy-vline 
WA_PEX2003GEN_STR-BWGRL sy-vline 
WA_PEX2003GEN_STR-WAERS sy-vline 
WA_PEX2003GEN_STR-WTART sy-vline      INTO ld_text SEPARATED BY SPACE.

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