ABAP Select data from SAP table ENT6421 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ENT6421 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 ENT6421. 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 ENT6421 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_ENT6421 TYPE STANDARD TABLE OF ENT6421,
      WA_ENT6421 TYPE ENT6421,
      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: <ENT6421> TYPE ENT6421.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ENT6421.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ENT6421
  INTO TABLE IT_ENT6421.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ENT6421
*  INTO TABLE @DATA(IT_ENT64212).
*--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_ENT6421 INDEX 1 INTO DATA(WA_ENT64212).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ENT6421 ASSIGNING <ENT6421>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ENT6421>-MANDT = 1.
<ENT6421>-VBELN = 1.
<ENT6421>-KUNNR = 1.
<ENT6421>-KTABG = 1.
<ENT6421>-KTAEN = 1.

ENDLOOP.

LOOP AT IT_ENT6421 INTO WA_ENT6421.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ENT6421-KTABT, sy-vline,
  WA_ENT6421-KTAET, sy-vline,
  WA_ENT6421-KTAAR, sy-vline,
  WA_ENT6421-VBTYP, sy-vline,
  WA_ENT6421-TRVOG, sy-vline,
  WA_ENT6421-VKORG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ENT6421 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_ENT6421 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_ENT6421 INTO WA_ENT6421.


*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 VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT6421-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT6421-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT6421-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT6421-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADRNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT6421-ADRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT6421-ADRNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_ENT6421-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT6421-PARVW.
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_ENT6421_STR, 
MANDT TYPE STRING,
VBELN TYPE STRING,
KUNNR TYPE STRING,
KTABG TYPE STRING,
KTAEN TYPE STRING,
KTABT TYPE STRING,
KTAET TYPE STRING,
KTAAR TYPE STRING,
VBTYP TYPE STRING,
TRVOG TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
VKBUR TYPE STRING,
VKGRP TYPE STRING,
KTAGR TYPE STRING,
KTAST TYPE STRING,
KTAER TYPE STRING,
KTAEB TYPE STRING,
KTARA TYPE STRING,
ADRNR TYPE STRING,
KTEXT TYPE STRING,
VBKLA TYPE STRING,
VBKLT TYPE STRING,
KTA01 TYPE STRING,
KTA02 TYPE STRING,
KTA03 TYPE STRING,
KTA04 TYPE STRING,
KTA05 TYPE STRING,
KTA06 TYPE STRING,
KTA07 TYPE STRING,
KTA08 TYPE STRING,
KTA09 TYPE STRING,
KTA10 TYPE STRING,
GBSTK TYPE STRING,
PARVW TYPE STRING,
KTAFK TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AEZET TYPE STRING,
AENAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ENT6421_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_ENT6421_STR-MANDT sy-vline 
WA_ENT6421_STR-VBELN sy-vline 
WA_ENT6421_STR-KUNNR sy-vline 
WA_ENT6421_STR-KTABG sy-vline 
WA_ENT6421_STR-KTAEN sy-vline 
WA_ENT6421_STR-KTABT sy-vline 
WA_ENT6421_STR-KTAET sy-vline 
WA_ENT6421_STR-KTAAR sy-vline 
WA_ENT6421_STR-VBTYP sy-vline 
WA_ENT6421_STR-TRVOG sy-vline 
WA_ENT6421_STR-VKORG sy-vline 
WA_ENT6421_STR-VTWEG sy-vline 
WA_ENT6421_STR-SPART sy-vline 
WA_ENT6421_STR-VKBUR sy-vline 
WA_ENT6421_STR-VKGRP sy-vline 
WA_ENT6421_STR-KTAGR sy-vline 
WA_ENT6421_STR-KTAST sy-vline 
WA_ENT6421_STR-KTAER sy-vline 
WA_ENT6421_STR-KTAEB sy-vline 
WA_ENT6421_STR-KTARA sy-vline 
WA_ENT6421_STR-ADRNR sy-vline 
WA_ENT6421_STR-KTEXT sy-vline 
WA_ENT6421_STR-VBKLA sy-vline 
WA_ENT6421_STR-VBKLT sy-vline 
WA_ENT6421_STR-KTA01 sy-vline 
WA_ENT6421_STR-KTA02 sy-vline 
WA_ENT6421_STR-KTA03 sy-vline 
WA_ENT6421_STR-KTA04 sy-vline 
WA_ENT6421_STR-KTA05 sy-vline 
WA_ENT6421_STR-KTA06 sy-vline 
WA_ENT6421_STR-KTA07 sy-vline 
WA_ENT6421_STR-KTA08 sy-vline 
WA_ENT6421_STR-KTA09 sy-vline 
WA_ENT6421_STR-KTA10 sy-vline 
WA_ENT6421_STR-GBSTK sy-vline 
WA_ENT6421_STR-PARVW sy-vline 
WA_ENT6421_STR-KTAFK sy-vline 
WA_ENT6421_STR-ERDAT sy-vline 
WA_ENT6421_STR-ERZET sy-vline 
WA_ENT6421_STR-ERNAM sy-vline 
WA_ENT6421_STR-AEDAT sy-vline 
WA_ENT6421_STR-AEZET sy-vline 
WA_ENT6421_STR-AENAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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