ABAP Select data from SAP table E2VPACH into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E2VPACH 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 E2VPACH. 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 E2VPACH 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_E2VPACH TYPE STANDARD TABLE OF E2VPACH,
      WA_E2VPACH TYPE E2VPACH,
      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: <E2VPACH> TYPE E2VPACH.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E2VPACH.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E2VPACH
  INTO TABLE IT_E2VPACH.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E2VPACH
*  INTO TABLE @DATA(IT_E2VPACH2).
*--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_E2VPACH INDEX 1 INTO DATA(WA_E2VPACH2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E2VPACH ASSIGNING <E2VPACH>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E2VPACH>-EXIDV = 1.
<E2VPACH>-EXIDA = 1.
<E2VPACH>-VSTEL = 1.
<E2VPACH>-LSTEL = 1.
<E2VPACH>-BRGEW = 1.

ENDLOOP.

LOOP AT IT_E2VPACH INTO WA_E2VPACH.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E2VPACH-NTGEW, sy-vline,
  WA_E2VPACH-MAGEW, sy-vline,
  WA_E2VPACH-TARAG, sy-vline,
  WA_E2VPACH-GEWEI, sy-vline,
  WA_E2VPACH-BTVOL, sy-vline,
  WA_E2VPACH-NTVOL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E2VPACH 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_E2VPACH 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_E2VPACH INTO WA_E2VPACH.


*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 EXIDV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2VPACH-EXIDV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2VPACH-EXIDV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field VHILM
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_E2VPACH-VHILM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2VPACH-VHILM.
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_E2VPACH_STR, 
EXIDV TYPE STRING,
EXIDA TYPE STRING,
VSTEL TYPE STRING,
LSTEL TYPE STRING,
BRGEW TYPE STRING,
NTGEW TYPE STRING,
MAGEW TYPE STRING,
TARAG TYPE STRING,
GEWEI TYPE STRING,
BTVOL TYPE STRING,
NTVOL TYPE STRING,
MAVOL TYPE STRING,
TAVOL TYPE STRING,
VOLEH TYPE STRING,
ANZGL TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERUHR TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AEZET TYPE STRING,
SORTL TYPE STRING,
VEGR1 TYPE STRING,
VEGR2 TYPE STRING,
VEGR3 TYPE STRING,
VEGR4 TYPE STRING,
VEGR5 TYPE STRING,
VHILM TYPE STRING,
LAENG TYPE STRING,
BREIT TYPE STRING,
HOEHE TYPE STRING,
MEABM TYPE STRING,
ERLKZ TYPE STRING,
GEWTO TYPE STRING,
VOLTO TYPE STRING,
MEINS TYPE STRING,
VOLEH_MAX TYPE STRING,
GEWEI_MAX TYPE STRING,
INHALT TYPE STRING,
WERKS TYPE STRING,
PSTYV TYPE STRING,
LADLG TYPE STRING,
LADEH TYPE STRING,
FARZT TYPE STRING,
FAREH TYPE STRING,
ENTFE TYPE STRING,
EHENT TYPE STRING,
LGORT TYPE STRING,
GEWFX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E2VPACH_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_E2VPACH_STR-EXIDV sy-vline 
WA_E2VPACH_STR-EXIDA sy-vline 
WA_E2VPACH_STR-VSTEL sy-vline 
WA_E2VPACH_STR-LSTEL sy-vline 
WA_E2VPACH_STR-BRGEW sy-vline 
WA_E2VPACH_STR-NTGEW sy-vline 
WA_E2VPACH_STR-MAGEW sy-vline 
WA_E2VPACH_STR-TARAG sy-vline 
WA_E2VPACH_STR-GEWEI sy-vline 
WA_E2VPACH_STR-BTVOL sy-vline 
WA_E2VPACH_STR-NTVOL sy-vline 
WA_E2VPACH_STR-MAVOL sy-vline 
WA_E2VPACH_STR-TAVOL sy-vline 
WA_E2VPACH_STR-VOLEH sy-vline 
WA_E2VPACH_STR-ANZGL sy-vline 
WA_E2VPACH_STR-ERNAM sy-vline 
WA_E2VPACH_STR-ERDAT sy-vline 
WA_E2VPACH_STR-ERUHR sy-vline 
WA_E2VPACH_STR-AENAM sy-vline 
WA_E2VPACH_STR-AEDAT sy-vline 
WA_E2VPACH_STR-AEZET sy-vline 
WA_E2VPACH_STR-SORTL sy-vline 
WA_E2VPACH_STR-VEGR1 sy-vline 
WA_E2VPACH_STR-VEGR2 sy-vline 
WA_E2VPACH_STR-VEGR3 sy-vline 
WA_E2VPACH_STR-VEGR4 sy-vline 
WA_E2VPACH_STR-VEGR5 sy-vline 
WA_E2VPACH_STR-VHILM sy-vline 
WA_E2VPACH_STR-LAENG sy-vline 
WA_E2VPACH_STR-BREIT sy-vline 
WA_E2VPACH_STR-HOEHE sy-vline 
WA_E2VPACH_STR-MEABM sy-vline 
WA_E2VPACH_STR-ERLKZ sy-vline 
WA_E2VPACH_STR-GEWTO sy-vline 
WA_E2VPACH_STR-VOLTO sy-vline 
WA_E2VPACH_STR-MEINS sy-vline 
WA_E2VPACH_STR-VOLEH_MAX sy-vline 
WA_E2VPACH_STR-GEWEI_MAX sy-vline 
WA_E2VPACH_STR-INHALT sy-vline 
WA_E2VPACH_STR-WERKS sy-vline 
WA_E2VPACH_STR-PSTYV sy-vline 
WA_E2VPACH_STR-LADLG sy-vline 
WA_E2VPACH_STR-LADEH sy-vline 
WA_E2VPACH_STR-FARZT sy-vline 
WA_E2VPACH_STR-FAREH sy-vline 
WA_E2VPACH_STR-ENTFE sy-vline 
WA_E2VPACH_STR-EHENT sy-vline 
WA_E2VPACH_STR-LGORT sy-vline 
WA_E2VPACH_STR-GEWFX sy-vline      INTO ld_text SEPARATED BY SPACE.

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