ABAP Select data from SAP table /GBT/E1KNVVM into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /GBT/E1KNVVM 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 /GBT/E1KNVVM. 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 /GBT/E1KNVVM 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_/GBT/E1KNVVM TYPE STANDARD TABLE OF /GBT/E1KNVVM,
      WA_/GBT/E1KNVVM TYPE /GBT/E1KNVVM,
      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: </GBT/E1KNVVM> TYPE /GBT/E1KNVVM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/GBT/E1KNVVM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /GBT/E1KNVVM
  INTO TABLE IT_/GBT/E1KNVVM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /GBT/E1KNVVM
*  INTO TABLE @DATA(IT_/GBT/E1KNVVM2).
*--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_/GBT/E1KNVVM INDEX 1 INTO DATA(WA_/GBT/E1KNVVM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/GBT/E1KNVVM ASSIGNING </GBT/E1KNVVM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</GBT/E1KNVVM>-MSGFN = 1.
</GBT/E1KNVVM>-VKORG = 1.
</GBT/E1KNVVM>-VTWEG = 1.
</GBT/E1KNVVM>-SPART = 1.
</GBT/E1KNVVM>-BEGRU = 1.

ENDLOOP.

LOOP AT IT_/GBT/E1KNVVM INTO WA_/GBT/E1KNVVM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/GBT/E1KNVVM-LOEVM, sy-vline,
  WA_/GBT/E1KNVVM-VERSG, sy-vline,
  WA_/GBT/E1KNVVM-AUFSD, sy-vline,
  WA_/GBT/E1KNVVM-KALKS, sy-vline,
  WA_/GBT/E1KNVVM-KDGRP, sy-vline,
  WA_/GBT/E1KNVVM-BZIRK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/GBT/E1KNVVM 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_/GBT/E1KNVVM 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_/GBT/E1KNVVM INTO WA_/GBT/E1KNVVM.


*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_/GBT/E1KNVVM_STR, 
MSGFN TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
BEGRU TYPE STRING,
LOEVM TYPE STRING,
VERSG TYPE STRING,
AUFSD TYPE STRING,
KALKS TYPE STRING,
KDGRP TYPE STRING,
BZIRK TYPE STRING,
KONDA TYPE STRING,
PLTYP TYPE STRING,
AWAHR TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
LIFSD TYPE STRING,
AUTLF TYPE STRING,
ANTLF TYPE STRING,
KZTLF TYPE STRING,
KZAZU TYPE STRING,
CHSPL TYPE STRING,
LPRIO TYPE STRING,
EIKTO TYPE STRING,
VSBED TYPE STRING,
FAKSD TYPE STRING,
MRNKZ TYPE STRING,
PERFK TYPE STRING,
PERRL TYPE STRING,
WAERS TYPE STRING,
KTGRD TYPE STRING,
ZTERM TYPE STRING,
VWERK TYPE STRING,
VKGRP TYPE STRING,
VKBUR TYPE STRING,
VSORT TYPE STRING,
KVGR1 TYPE STRING,
KVGR2 TYPE STRING,
KVGR3 TYPE STRING,
KVGR4 TYPE STRING,
KVGR5 TYPE STRING,
BOKRE TYPE STRING,
KURST TYPE STRING,
PRFRE TYPE STRING,
KLABC TYPE STRING,
KABSS TYPE STRING,
KKBER TYPE STRING,
CASSD TYPE STRING,
RDOFF TYPE STRING,
AGREL TYPE STRING,
MEGRU TYPE STRING,
UEBTO TYPE STRING,
UNTTO TYPE STRING,
UEBTK TYPE STRING,
PVKSM TYPE STRING,
PODKZ TYPE STRING,
PODTG TYPE STRING,
BLIND TYPE STRING,
CARRIER_NOTIF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/GBT/E1KNVVM_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_/GBT/E1KNVVM_STR-MSGFN sy-vline 
WA_/GBT/E1KNVVM_STR-VKORG sy-vline 
WA_/GBT/E1KNVVM_STR-VTWEG sy-vline 
WA_/GBT/E1KNVVM_STR-SPART sy-vline 
WA_/GBT/E1KNVVM_STR-BEGRU sy-vline 
WA_/GBT/E1KNVVM_STR-LOEVM sy-vline 
WA_/GBT/E1KNVVM_STR-VERSG sy-vline 
WA_/GBT/E1KNVVM_STR-AUFSD sy-vline 
WA_/GBT/E1KNVVM_STR-KALKS sy-vline 
WA_/GBT/E1KNVVM_STR-KDGRP sy-vline 
WA_/GBT/E1KNVVM_STR-BZIRK sy-vline 
WA_/GBT/E1KNVVM_STR-KONDA sy-vline 
WA_/GBT/E1KNVVM_STR-PLTYP sy-vline 
WA_/GBT/E1KNVVM_STR-AWAHR sy-vline 
WA_/GBT/E1KNVVM_STR-INCO1 sy-vline 
WA_/GBT/E1KNVVM_STR-INCO2 sy-vline 
WA_/GBT/E1KNVVM_STR-LIFSD sy-vline 
WA_/GBT/E1KNVVM_STR-AUTLF sy-vline 
WA_/GBT/E1KNVVM_STR-ANTLF sy-vline 
WA_/GBT/E1KNVVM_STR-KZTLF sy-vline 
WA_/GBT/E1KNVVM_STR-KZAZU sy-vline 
WA_/GBT/E1KNVVM_STR-CHSPL sy-vline 
WA_/GBT/E1KNVVM_STR-LPRIO sy-vline 
WA_/GBT/E1KNVVM_STR-EIKTO sy-vline 
WA_/GBT/E1KNVVM_STR-VSBED sy-vline 
WA_/GBT/E1KNVVM_STR-FAKSD sy-vline 
WA_/GBT/E1KNVVM_STR-MRNKZ sy-vline 
WA_/GBT/E1KNVVM_STR-PERFK sy-vline 
WA_/GBT/E1KNVVM_STR-PERRL sy-vline 
WA_/GBT/E1KNVVM_STR-WAERS sy-vline 
WA_/GBT/E1KNVVM_STR-KTGRD sy-vline 
WA_/GBT/E1KNVVM_STR-ZTERM sy-vline 
WA_/GBT/E1KNVVM_STR-VWERK sy-vline 
WA_/GBT/E1KNVVM_STR-VKGRP sy-vline 
WA_/GBT/E1KNVVM_STR-VKBUR sy-vline 
WA_/GBT/E1KNVVM_STR-VSORT sy-vline 
WA_/GBT/E1KNVVM_STR-KVGR1 sy-vline 
WA_/GBT/E1KNVVM_STR-KVGR2 sy-vline 
WA_/GBT/E1KNVVM_STR-KVGR3 sy-vline 
WA_/GBT/E1KNVVM_STR-KVGR4 sy-vline 
WA_/GBT/E1KNVVM_STR-KVGR5 sy-vline 
WA_/GBT/E1KNVVM_STR-BOKRE sy-vline 
WA_/GBT/E1KNVVM_STR-KURST sy-vline 
WA_/GBT/E1KNVVM_STR-PRFRE sy-vline 
WA_/GBT/E1KNVVM_STR-KLABC sy-vline 
WA_/GBT/E1KNVVM_STR-KABSS sy-vline 
WA_/GBT/E1KNVVM_STR-KKBER sy-vline 
WA_/GBT/E1KNVVM_STR-CASSD sy-vline 
WA_/GBT/E1KNVVM_STR-RDOFF sy-vline 
WA_/GBT/E1KNVVM_STR-AGREL sy-vline 
WA_/GBT/E1KNVVM_STR-MEGRU sy-vline 
WA_/GBT/E1KNVVM_STR-UEBTO sy-vline 
WA_/GBT/E1KNVVM_STR-UNTTO sy-vline 
WA_/GBT/E1KNVVM_STR-UEBTK sy-vline 
WA_/GBT/E1KNVVM_STR-PVKSM sy-vline 
WA_/GBT/E1KNVVM_STR-PODKZ sy-vline 
WA_/GBT/E1KNVVM_STR-PODTG sy-vline 
WA_/GBT/E1KNVVM_STR-BLIND sy-vline 
WA_/GBT/E1KNVVM_STR-CARRIER_NOTIF sy-vline      INTO ld_text SEPARATED BY SPACE.

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